spring-19-20 reactor, webflux

2024-11/spring-19-reactor/.gitignore

@@ -0,0 +1,7 @@
+.idea/
+*.iml
+
+target/
+
+/node_modules
+/output

2024-11/spring-19-reactor/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

2024-11/spring-19-reactor/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

2024-11/spring-19-reactor/mvnw

@@ -0,0 +1,310 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

2024-11/spring-19-reactor/mvnw.cmd

@@ -0,0 +1,182 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

2024-11/spring-19-reactor/pom.xml

@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>ru.otus</groupId>
+    <artifactId>spring-19-reactor</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.4.2</version>
+    </parent>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+    </properties>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>io.projectreactor</groupId>
+                <artifactId>reactor-bom</artifactId>
+                <version>2024.0.3</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-dependencies</artifactId>
+                <version>3.4.2</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+
+    <dependencies>
+        <dependency>
+            <groupId>io.projectreactor</groupId>
+            <artifactId>reactor-core</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>io.projectreactor</groupId>
+            <artifactId>reactor-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+</project>

2024-11/spring-19-reactor/src/main/java/ru/otus/CreateExample.java

@@ -0,0 +1,74 @@
+package ru.otus;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import reactor.core.Disposable;
+import reactor.core.publisher.Flux;
+
+public class CreateExample {
+    private static final Logger logger = LoggerFactory.getLogger(CreateExample.class);
+
+    public static void main(String[] args) {
+         onEachNext();
+         lazyObservable();
+         creatorExample();
+    }
+
+    private static void onEachNext() {
+        Flux<String> obs = Flux.just("one1", "two1", "three1");
+        obs.doFirst(() -> logger.info("Starting:"))
+                .doOnComplete(() -> logger.info("The end!"))
+                .doOnEach(item -> logger.info("1 item_1:{}", item.get()))
+                .subscribe();
+
+        logger.info("-----");
+
+        obs.doOnNext(item -> logger.info("2 item_2:{}", item))
+                .map(String::length)
+                .doOnNext(item -> logger.info("length_2:{}", item))
+                .subscribe();
+    }
+
+    private static void lazyObservable() {
+        Flux<String> obs = Flux.defer(() -> {
+            logger.info("creating new Observable");
+            return Flux.just("one", "two", "three");
+        });
+
+        obs.doOnNext(item -> logger.info("item_1:{}", item))
+                .subscribe();
+
+        logger.info("----------------");
+
+        obs.doOnNext(item -> logger.info("item_2:{}", item))
+                .subscribe();
+    }
+
+    private static void creatorExample() {
+        Flux<String> obs = Flux.create(emitter -> {
+            emitter.next("one");
+            emitter.next("two");
+
+            emitter.error(new RuntimeException("Error!"));
+
+            emitter.next("three");
+            emitter.complete();
+        });
+
+        obs.onErrorResume(e -> {
+                    logger.error("error:{}", e.getMessage(), e);
+                    return Flux.just("r1", "r2", "r3");
+                })
+                .doOnNext(item -> logger.info("item__1:{}", item))
+                .subscribe();
+
+        logger.info("---------------");
+
+        Disposable disposable = obs.doOnNext(item -> logger.info("item__2:{}", item))
+                .subscribe(next -> logger.info("next:{}", next),
+                        error -> logger.info("error:{}", error.getMessage()),
+                        () -> logger.info("onComplete"));
+
+        logger.info("isDisposed:{}", disposable.isDisposed());
+    }
+}

2024-11/spring-19-reactor/src/main/java/ru/otus/OperatorsExample.java

@@ -0,0 +1,51 @@
+package ru.otus;
+
+import java.time.LocalDate;
+import java.util.List;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import reactor.core.publisher.Flux;
+
+
+public class OperatorsExample {
+    private static final Logger logger = LoggerFactory.getLogger(OperatorsExample.class);
+
+    public static void main(String[] args) {
+         merge();
+         fromList();
+    }
+
+    private static void merge() {
+        var listFlux1 = Flux.fromIterable(List.of(
+                new Person("John", "Dow", "male", LocalDate.of(1992, 3, 12)),
+                new Person("Jane", "Dow", "female", LocalDate.of(2001, 6, 23))));
+
+        var listFlux2 = Flux.fromIterable(List.of(
+                new Person("Howard", "Lovecraft", "male", LocalDate.of(1890, 8, 20)),
+                new Person("Joanne", "Rowling", "female", LocalDate.of(1965, 6, 30))));
+
+        var listFlux3 = Flux.fromIterable(List.of(
+                new Person("Ivan", "Petrov", "male", LocalDate.of(1890, 2, 10)),
+                new Person("Joanne", "Stuard", "female", LocalDate.of(1965, 1, 3))));
+
+        Flux.merge(listFlux1, listFlux2, listFlux3)
+                .subscribe(person -> logger.info("person:{}", person));
+
+    }
+
+    private static void fromList() {
+        var persons = List.of(
+                new Person("John", "Dow", "male", LocalDate.of(1992, 3, 12)),
+                new Person("Jane", "Dow", "female", LocalDate.of(2001, 6, 23)),
+                new Person("Howard", "Lovecraft", "male", LocalDate.of(1890, 8, 20)),
+                new Person("Joanne", "Rowling", "female", LocalDate.of(1965, 6, 30)));
+
+        var disposable = Flux.fromIterable(persons)
+                .filter(person -> person.birth().isAfter(LocalDate.of(1990, 1, 1)))
+                .map(p -> p.firstName() + " " + p.lastName())
+                .collectList()
+                .subscribe(item -> logger.info("item: {}", item));
+
+        logger.info("disposable.isDisposed:{}", disposable.isDisposed());
+    }
+}

2024-11/spring-19-reactor/src/main/java/ru/otus/Person.java

@@ -0,0 +1,6 @@
+package ru.otus;
+
+import java.time.LocalDate;
+
+public record Person(String firstName, String lastName, String gender, LocalDate birth) {
+}

2024-11/spring-19-reactor/src/main/java/ru/otus/PublisherExample.java

@@ -0,0 +1,56 @@
+package ru.otus;
+
+import java.time.Duration;
+import java.util.function.BiFunction;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import reactor.core.publisher.ConnectableFlux;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.SynchronousSink;
+import reactor.core.scheduler.Schedulers;
+
+public class PublisherExample {
+    private static final Logger logger = LoggerFactory.getLogger(PublisherExample.class);
+
+    public static void main(String[] args) throws Exception {
+        publisherExample();
+    }
+
+    public static void publisherExample() throws InterruptedException {
+        Flux<String> ob = magicPublisher();
+        Thread.sleep(5000);
+        logger.info("First subscribed");
+        var disposable1 = ob.subscribe(item -> logger.info("item: {}", item));
+
+        logger.info("disposable1.isDisposed:{}", disposable1.isDisposed());
+        Thread.sleep(5000);
+
+        logger.info("Second subscribed");
+        var disposable2 = ob.subscribe(item -> logger.info("item second: {}", item));
+
+
+        logger.info("disposable2.isDisposed():{}", disposable2.isDisposed());
+
+        Thread.sleep(60_000);
+    }
+
+    public static Flux<String> magicPublisher() {
+        var schedulerGenerator = Schedulers.newParallel("generator", 1);
+        var generator = Flux.generate(
+                        () -> 0L,
+                        (BiFunction<Long, SynchronousSink<Long>, Long>)
+                                (prev, sink) -> {
+                                    var newValue = prev + 1;
+                                    sink.next(newValue);
+                                    logger.info("newValue:{}", newValue);
+                                    return newValue;
+                                })
+                .delayElements(Duration.ofSeconds(5), schedulerGenerator)
+                .map(id -> "new id:" + id)
+                .doOnNext(val -> logger.info("val:{}", val));
+
+        ConnectableFlux<String> generatorConnectable = generator.publish();
+
+        return generatorConnectable.autoConnect(0);
+    }
+}

2024-11/spring-20-webflux/.gitignore

@@ -0,0 +1,4 @@
+.idea/
+*.iml
+
+target/

2024-11/spring-20-webflux/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

2024-11/spring-20-webflux/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

2024-11/spring-20-webflux/HttpRequests.http

@@ -0,0 +1,47 @@
+###
+GET http://localhost:8080/flux/one
+Accept: */*
+Content-Type: application/json
+Cache-Control: no-cache
+
+###
+GET http://localhost:8080/flux/ten
+Accept: */*
+Content-Type: application/json
+Cache-Control: no-cache
+
+###
+GET http://localhost:8080/stream
+Accept: */*
+Content-Type: application/json
+Cache-Control: no-cache
+
+###
+GET http://localhost:8080/person
+Accept: */*
+Content-Type: application/json
+Cache-Control: no-cache
+
+###
+GET curl
+Accept: */*
+Content-Type: application/json
+Cache-Control: no-cache
+
+###
+GET http://localhost:8080/func/person?name=Lermontov
+Accept: */*
+Content-Type: application/json
+Cache-Control: no-cache
+
+###
+GET http://localhost:8080/func/person?age=22
+Accept: */*
+Content-Type: application/json
+Cache-Control: no-cache
+
+###
+GET http://localhost:8080/func/person/1
+Accept: */*
+Content-Type: application/json
+Cache-Control: no-cache

2024-11/spring-20-webflux/docker/runDb.src

@@ -0,0 +1,6 @@
+docker run --rm --name pg-docker \
+-e POSTGRES_PASSWORD=pwd \
+-e POSTGRES_USER=usr \
+-e POSTGRES_DB=demoDB \
+-p 5430:5432 \
+postgres:16

2024-11/spring-20-webflux/mvnw

@@ -0,0 +1,310 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

2024-11/spring-20-webflux/mvnw.cmd

@@ -0,0 +1,182 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

2024-11/spring-20-webflux/pom.xml

@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>ru.otus</groupId>
+    <artifactId>spring-20-webflux</artifactId>
+    <version>1.0</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.4.2</version>
+    </parent>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+    </properties>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>io.projectreactor</groupId>
+                <artifactId>reactor-bom</artifactId>
+                <version>2024.0.3</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-dependencies</artifactId>
+                <version>3.4.2</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.testcontainers</groupId>
+                <artifactId>testcontainers-bom</artifactId>
+                <version>1.20.4</version>
+                <type>pom</type>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-webflux</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jdbc</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-r2dbc</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.flywaydb</groupId>
+            <artifactId>flyway-core</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.flywaydb</groupId>
+            <artifactId>flyway-database-postgresql</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>r2dbc-postgresql</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.jetbrains</groupId>
+            <artifactId>annotations</artifactId>
+            <version>24.0.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>testcontainers</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>postgresql</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+
+        <!-- Тестирование -->
+        <dependency>
+            <groupId>io.projectreactor</groupId>
+            <artifactId>reactor-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/DataFiller.java

@@ -0,0 +1,52 @@
+package ru.otus.spring;
+
+import java.util.Arrays;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.ApplicationArguments;
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.stereotype.Component;
+import reactor.core.scheduler.Scheduler;
+import ru.otus.spring.domain.Notes;
+import ru.otus.spring.domain.Person;
+import ru.otus.spring.repository.NotesRepository;
+import ru.otus.spring.repository.PersonRepository;
+import ru.otus.spring.repository.PersonRepositoryCustom;
+
+@Component
+public class DataFiller implements ApplicationRunner {
+    private static final Logger logger = LoggerFactory.getLogger(DataFiller.class);
+
+    private final PersonRepository personRepository;
+    private final NotesRepository notesRepository;
+    private final PersonRepositoryCustom personRepositoryCustom;
+    private final Scheduler workerPool;
+
+    public DataFiller(PersonRepository personRepository, NotesRepository notesRepository, PersonRepositoryCustom personRepositoryCustom, Scheduler workerPool) {
+        this.personRepository = personRepository;
+        this.notesRepository = notesRepository;
+        this.workerPool = workerPool;
+        this.personRepositoryCustom = personRepositoryCustom;
+    }
+
+    @Override
+    public void run(ApplicationArguments args) {
+        personRepository.saveAll(Arrays.asList(
+                new Person("Pushkin", 22),
+                new Person("Lermontov", 22),
+                new Person("Tolstoy", 60)
+        )).publishOn(workerPool)
+                .subscribe(savedPerson -> {
+                    logger.info("saved person:{}", savedPerson);
+                    notesRepository.saveAll(Arrays.asList(
+                                    new Notes(null, "txt_1_" + savedPerson.getId(), savedPerson.getId()),
+                                    new Notes(null, "txt_2_" + savedPerson.getId(), savedPerson.getId())))
+                            .publishOn(workerPool)
+                            .subscribe(savedNotes -> logger.info("saved notes:{}", savedNotes));
+                });
+
+        personRepositoryCustom.findAll()
+                .publishOn(workerPool)
+                .subscribe(personDto -> logger.info("personDto:{}", personDto));
+    }
+}

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/FunctionalEndpointsConfig.java

@@ -0,0 +1,67 @@
+package ru.otus.spring;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.ServerRequest;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import reactor.core.publisher.Mono;
+import ru.otus.spring.domain.Person;
+import ru.otus.spring.repository.PersonRepository;
+
+import static org.springframework.http.MediaType.APPLICATION_JSON;
+import static org.springframework.web.reactive.function.BodyInserters.fromValue;
+import static org.springframework.web.reactive.function.server.RequestPredicates.accept;
+import static org.springframework.web.reactive.function.server.RequestPredicates.queryParam;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
+import static org.springframework.web.reactive.function.server.ServerResponse.badRequest;
+import static org.springframework.web.reactive.function.server.ServerResponse.notFound;
+import static org.springframework.web.reactive.function.server.ServerResponse.ok;
+
+@Configuration
+public class FunctionalEndpointsConfig {
+    @Bean
+    public RouterFunction<ServerResponse> composedRoutes(PersonRepository repository) {
+        return route()
+                // эта функция должна стоять раньше findAll - порядок следования роутов - важен
+                .GET("/func/person",
+                        queryParam("name", param -> param != null && !param.isEmpty()),
+                        request -> request.queryParam("name")
+                                .map(name -> ok().body(repository.findAllByLastName(name), Person.class))
+                                .orElse(badRequest().build())
+                )
+                // пример другой реализации - начиная с запроса репозитория
+                .GET("/func/person", queryParam("age", param -> param != null && !param.isEmpty()),
+                        request ->
+                                ok()
+                                        .contentType(MediaType.APPLICATION_JSON)
+                                        .body(repository.findAllByAge(request.queryParam("age")
+                                                        .map(Integer::parseInt)
+                                                        .orElseThrow(IllegalArgumentException::new)), Person.class)
+                )
+                // Обратите внимание на использование хэндлера
+                .GET("/func/person", accept(APPLICATION_JSON), new PersonHandler(repository)::list)
+                // Обратите внимание на использование pathVariable
+                .GET("/func/person/{id}", accept(APPLICATION_JSON),
+                        request -> repository.findById(Long.parseLong(request.pathVariable("id")))
+                                .flatMap(person -> ok().contentType(APPLICATION_JSON).body(fromValue(person)))
+                                .switchIfEmpty(notFound().build())
+                ).build();
+    }
+
+    // Это пример хэндлера, который даже не бин
+    static class PersonHandler {
+
+        private final PersonRepository repository;
+
+        PersonHandler(PersonRepository repository) {
+            this.repository = repository;
+        }
+
+        Mono<ServerResponse> list(ServerRequest request) {
+            // Обратите внимание на пример другого порядка создания response от Flux
+            return ok().contentType(APPLICATION_JSON).body(repository.findAll(), Person.class);
+        }
+    }
+}

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/WebfluxDemo.java

@@ -0,0 +1,16 @@
+package ru.otus.spring;
+
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+
+@SpringBootApplication
+public class WebfluxDemo {
+
+
+    public static void main(String[] args) {
+     SpringApplication.run(WebfluxDemo.class);
+    }
+}
+

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/config/ApplConfig.java

@@ -0,0 +1,41 @@
+package ru.otus.spring.config;
+
+import io.netty.channel.nio.NioEventLoopGroup;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicLong;
+import org.springframework.boot.web.embedded.netty.NettyReactiveWebServerFactory;
+import org.springframework.boot.web.reactive.server.ReactiveWebServerFactory;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import reactor.core.scheduler.Scheduler;
+import reactor.core.scheduler.Schedulers;
+import reactor.util.annotation.NonNull;
+
+@Configuration
+public class ApplConfig {
+    private static final int THREAD_POOL_SIZE = 2;
+
+    @Bean(destroyMethod = "close")
+    public NioEventLoopGroup eventLoopGroup() {
+        return new NioEventLoopGroup(THREAD_POOL_SIZE,
+                new ThreadFactory() {
+                    private final AtomicLong threadIdGenerator = new AtomicLong(0);
+                    @Override
+                    public Thread newThread(@NonNull Runnable task) {
+                        return new Thread(task, "server-thread-" + threadIdGenerator.incrementAndGet());
+                    }
+                });
+    }
+
+    @Bean
+    public ReactiveWebServerFactory reactiveWebServerFactory(NioEventLoopGroup eventLoopGroup) {
+        var factory = new NettyReactiveWebServerFactory();
+        factory.addServerCustomizers(builder -> builder.runOn(eventLoopGroup));
+        return factory;
+    }
+
+    @Bean
+    public Scheduler workerPool() {
+        return Schedulers.newParallel("worker-thread", THREAD_POOL_SIZE);
+    }
+}

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/domain/Notes.java

@@ -0,0 +1,49 @@
+package ru.otus.spring.domain;
+
+import org.jetbrains.annotations.NotNull;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.annotation.PersistenceCreator;
+import org.springframework.data.relational.core.mapping.Table;
+
+@Table("notes")
+public class Notes {
+
+    @Id
+    private final Long id;
+
+    @NotNull
+    private final String noteText;
+
+    @NotNull
+    private final Long personId;
+
+    @PersistenceCreator
+    public Notes(Long id, @NotNull String noteText, @NotNull Long personId) {
+        this.id = id;
+        this.noteText = noteText;
+        this.personId = personId;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    @NotNull
+    public String getNoteText() {
+        return noteText;
+    }
+
+    @NotNull
+    public  Long getPersonId() {
+        return personId;
+    }
+
+    @Override
+    public String toString() {
+        return "Notes{" +
+                "id=" + id +
+                ", noteText='" + noteText + '\'' +
+                ", personId=" + personId +
+                '}';
+    }
+}

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/domain/Person.java

@@ -0,0 +1,53 @@
+package ru.otus.spring.domain;
+
+import org.jetbrains.annotations.NotNull;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.annotation.PersistenceCreator;
+import org.springframework.data.relational.core.mapping.Table;
+
+@Table("person")
+public class Person {
+
+    @Id
+    private final Long id;
+
+    @NotNull
+    private final String lastName;
+
+    private final int age;
+
+
+    @PersistenceCreator
+    private Person(Long id, @NotNull String lastName, int age) {
+        this.id = id;
+        this.lastName = lastName;
+        this.age = age;
+    }
+
+    public Person(String lastName, int age) {
+        this(null, lastName,  age);
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+
+    public @NotNull String getLastName() {
+        return lastName;
+    }
+
+
+    public int getAge() {
+        return age;
+    }
+
+    @Override
+    public String toString() {
+        return "Person{" +
+                "id=" + id +
+                ", lastName='" + lastName + '\'' +
+                ", age=" + age +
+                '}';
+    }
+}

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/domain/PersonDto.java

@@ -0,0 +1,8 @@
+package ru.otus.spring.domain;
+
+
+import java.util.List;
+
+public record PersonDto(String id, String name, Integer age, List<String> notes) {
+
+}

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/repository/NotesRepository.java

@@ -0,0 +1,12 @@
+package ru.otus.spring.repository;
+
+import org.jetbrains.annotations.NotNull;
+import org.springframework.data.repository.reactive.ReactiveCrudRepository;
+import reactor.core.publisher.Flux;
+import ru.otus.spring.domain.Notes;
+
+
+public interface NotesRepository extends ReactiveCrudRepository<Notes, Long> {
+
+    Flux<Notes> findByPersonId(@NotNull Long personId);
+}

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/repository/PersonRepository.java

@@ -0,0 +1,18 @@
+package ru.otus.spring.repository;
+
+import org.jetbrains.annotations.NotNull;
+import org.springframework.data.repository.reactive.ReactiveCrudRepository;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import ru.otus.spring.domain.Person;
+
+public interface PersonRepository extends ReactiveCrudRepository<Person, Long> {
+
+    @NotNull Mono<Person> findById(@NotNull Long id);
+
+    Mono<Person> save(Mono<Person> person);
+
+    Flux<Person> findAllByLastName(String lastName);
+
+    Flux<Person> findAllByAge(int age);
+}

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/repository/PersonRepositoryCustom.java

@@ -0,0 +1,55 @@
+package ru.otus.spring.repository;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import io.r2dbc.spi.Readable;
+import org.springframework.data.r2dbc.core.R2dbcEntityTemplate;
+import org.springframework.stereotype.Repository;
+import reactor.core.publisher.Flux;
+import ru.otus.spring.domain.PersonDto;
+
+import java.util.List;
+
+
+@Repository
+public class PersonRepositoryCustom {
+
+    private final R2dbcEntityTemplate template;
+    private final ObjectMapper objectMapper;
+
+    private static final String SQL_ALL = """
+            select json_agg(n.note_text) as notes, n.person_id,
+                   p.last_name, p.age
+                 from notes n
+              inner join person p
+                on n.person_id = p.id
+                group by n.person_id, p.last_name, p.age
+            """;
+
+    public PersonRepositoryCustom(R2dbcEntityTemplate template, ObjectMapper objectMapper) {
+        this.template = template;
+        this.objectMapper = objectMapper;
+    }
+
+    public Flux<PersonDto> findAll() {
+        return template.getDatabaseClient().inConnectionMany(connection ->
+                Flux.from(connection.createStatement(SQL_ALL)
+                                .execute())
+                        .flatMap(result -> result.map(this::mapper)));
+    }
+
+    private PersonDto mapper(Readable selectedRecord) {
+        var notesAsText = selectedRecord.get("notes", String.class);
+        try {
+            List<String> notes = objectMapper.readValue(notesAsText, new TypeReference<>() {
+            });
+            return new PersonDto(selectedRecord.get("person_id", String.class),
+                    selectedRecord.get("last_name", String.class),
+                    selectedRecord.get("age", Integer.class),
+                    notes);
+        } catch (JsonProcessingException e) {
+            throw new IllegalArgumentException("notes:" + notesAsText + " parsing error:" + e);
+        }
+    }
+}

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/rest/AnnotatedController.java

@@ -0,0 +1,49 @@
+package ru.otus.spring.rest;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import java.time.Duration;
+import reactor.core.scheduler.Scheduler;
+
+
+@RestController
+public class AnnotatedController {
+    private static final Logger logger = LoggerFactory.getLogger(AnnotatedController.class);
+
+    private final Scheduler workerPool;
+
+    public AnnotatedController(Scheduler workerPool) {
+        this.workerPool = workerPool;
+    }
+
+    @GetMapping("/flux/one")
+    public Mono<String> one() {
+        return Mono.just("one");
+    }
+
+    @GetMapping(path ="/flux/ten", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
+    public Flux<Integer> list() {
+        logger.info("list request");
+        return Flux.range(1, 10)
+                .delayElements(Duration.ofSeconds(1), workerPool)
+                .doOnNext(val -> logger.info("value:{}", val));
+    }
+
+    @GetMapping(path = "/stream", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
+    public Flux<String> stream() {
+        logger.info("stream");
+        return Flux.generate(() -> 0, (state, emitter) -> {
+                    emitter.next(state);
+                    return state + 1;
+                })
+                .delayElements(Duration.ofSeconds(1L))
+                .map(Object::toString)
+                .map(val -> String.format("valStr:%s", val));
+    }
+}

2024-11/spring-20-webflux/src/main/java/ru/otus/spring/rest/PersonController.java

@@ -0,0 +1,57 @@
+package ru.otus.spring.rest;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import ru.otus.spring.domain.Notes;
+import ru.otus.spring.domain.Person;
+import ru.otus.spring.domain.PersonDto;
+import ru.otus.spring.repository.NotesRepository;
+import ru.otus.spring.repository.PersonRepository;
+import ru.otus.spring.repository.PersonRepositoryCustom;
+
+import java.util.List;
+
+@RestController
+public class PersonController {
+
+    private final PersonRepository personRepository;
+    private final NotesRepository notesRepository;
+
+    private final PersonRepositoryCustom personRepositoryCustom;
+
+    public PersonController(PersonRepository personRepository, NotesRepository notesRepository, PersonRepositoryCustom personRepositoryCustom) {
+        this.personRepository = personRepository;
+        this.notesRepository = notesRepository;
+        this.personRepositoryCustom = personRepositoryCustom;
+    }
+
+    @GetMapping("/person")
+    public Flux<PersonDto> all() {
+        return personRepositoryCustom.findAll();
+    }
+
+    @GetMapping("/person/{id}")
+    public Mono<ResponseEntity<PersonDto>> byId(@PathVariable("id") Long id) {
+        return personRepository.findById(id)
+                .flatMap(person -> notesRepository.findByPersonId(person.getId()).map(Notes::getNoteText).collectList()
+                        .map(notes -> toDto(person, notes)))
+                .map(ResponseEntity::ok)
+                .switchIfEmpty(Mono.fromCallable(() -> ResponseEntity.notFound().build()));
+    }
+
+    @PostMapping("/person")
+    public Mono<Person> save(@RequestBody Mono<Person> dto) {
+        return personRepository.save(dto);
+    }
+
+    @GetMapping("/person/find")
+    public Flux<Person> byName(@RequestParam("name") String name) {
+        return personRepository.findAllByLastName(name);
+    }
+
+    private PersonDto toDto(Person person, List<String> notes) {
+        return new PersonDto(String.valueOf(person.getId()), person.getLastName(), person.getAge(), notes);
+    }
+}

2024-11/spring-20-webflux/src/main/resources/application.yml

@@ -0,0 +1,17 @@
+server:
+  port: 8080
+
+spring:
+  r2dbc:
+    url: r2dbc:postgresql://localhost:5430/demoDB
+    username: usr
+    password: pwd
+  flyway:
+    url: jdbc:postgresql://localhost:5430/demoDB
+    user: usr
+    password: pwd
+
+
+logging:
+  level:
+    org.springframework.jdbc.core.JdbcTemplate: TRACE

2024-11/spring-20-webflux/src/main/resources/db/migration/V1__initial_schema.sql

@@ -0,0 +1,15 @@
+create table person
+(
+    id         bigserial    not null primary key,
+    last_name  varchar(50)  not null,
+    age        int not null
+);
+
+create table notes
+(
+    id           bigserial   not null primary key,
+    note_text    varchar(250) not null,
+    person_id    bigint not null references person (id)
+);
+create index idx_notes_person_id on notes (person_id);
+

2024-11/spring-20-webflux/src/main/resources/logback.xml

@@ -0,0 +1,11 @@
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="info">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

2024-11/spring-20-webflux/src/test/java/ru/otus/spring/BaseContainerTest.java

@@ -0,0 +1,29 @@
+package ru.otus.spring;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.test.context.DynamicPropertyRegistry;
+import org.springframework.test.context.DynamicPropertySource;
+import org.testcontainers.containers.PostgreSQLContainer;
+
+public abstract class BaseContainerTest {
+    private static final Logger log = LoggerFactory.getLogger(BaseContainerTest.class);
+    private static final PostgreSQLContainer<?> POSTGRE_SQL_CONTAINER = new PostgreSQLContainer<>("postgres:16");
+
+    static {
+        POSTGRE_SQL_CONTAINER.start();
+    }
+
+    @DynamicPropertySource
+    public static void properties(DynamicPropertyRegistry registry) {
+        log.info("POSTGRE_SQL_CONTAINER.getJdbcUrl:{}", POSTGRE_SQL_CONTAINER.getJdbcUrl());
+        registry.add("spring.flyway.url", () -> POSTGRE_SQL_CONTAINER.getJdbcUrl() + "&stringtype=unspecified");
+        registry.add("spring.flyway.user", POSTGRE_SQL_CONTAINER::getUsername);
+        registry.add("spring.flyway.password", POSTGRE_SQL_CONTAINER::getPassword);
+
+        registry.add("spring.r2dbc.url", () -> String.format("r2dbc:postgresql://%s:%d/%s",
+                POSTGRE_SQL_CONTAINER.getHost(), POSTGRE_SQL_CONTAINER.getMappedPort(5432), POSTGRE_SQL_CONTAINER.getDatabaseName()));
+        registry.add("spring.r2dbc.username", POSTGRE_SQL_CONTAINER::getUsername);
+        registry.add("spring.r2dbc.password", POSTGRE_SQL_CONTAINER::getPassword);
+    }
+}

2024-11/spring-20-webflux/src/test/java/ru/otus/spring/repository/PersonRepositoryTest.java

@@ -0,0 +1,30 @@
+package ru.otus.spring.repository;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.data.mongo.DataMongoTest;
+import org.springframework.boot.test.context.SpringBootTest;
+import reactor.core.publisher.Mono;
+import reactor.test.StepVerifier;
+import ru.otus.spring.BaseContainerTest;
+import ru.otus.spring.domain.Person;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@SpringBootTest
+class PersonRepositoryTest extends BaseContainerTest {
+
+    @Autowired
+    private PersonRepository repository;
+
+    @Test
+    void shouldSetIdOnSave() {
+        Mono<Person> personMono = repository.save(new Person("Bill", 12));
+
+        StepVerifier
+                .create(personMono)
+                .assertNext(person -> assertNotNull(person.getId()))
+                .expectComplete()
+                .verify();
+    }
+}

2024-11/spring-20-webflux/src/test/java/ru/otus/spring/rest/AnnotatedControllerTest.java

@@ -0,0 +1,98 @@
+package ru.otus.spring.rest;
+
+import java.time.Duration;
+import java.util.List;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.test.StepVerifier;
+import ru.otus.spring.BaseContainerTest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+class AnnotatedControllerTest extends BaseContainerTest {
+
+    @Autowired
+    private WebTestClient webTestClient;
+    @LocalServerPort
+    private int port;
+
+
+    @Test
+    void oneTest() {
+        //given
+        var client = WebClient.create(String.format("http://localhost:%d", port));
+
+        //when
+        var result = client
+                .get().uri("/flux/one")
+                .accept(MediaType.APPLICATION_JSON)
+                .retrieve()
+                .bodyToMono(String.class)
+                .timeout(Duration.ofSeconds(3))
+                .block();
+
+        //then
+        assertThat(result).isEqualTo("one");
+    }
+
+    @Test
+    void streamTest() {
+        //given
+        var client = WebClient.create(String.format("http://localhost:%d", port));
+        var expectedSize = 5;
+
+        //when
+        List<String> result = client
+                .get().uri("/stream")
+                .accept(MediaType.TEXT_EVENT_STREAM)
+                .retrieve()
+                .bodyToFlux(String.class)
+                .take(expectedSize)
+                .timeout(Duration.ofSeconds(3))
+                .collectList()
+                .block();
+
+        //then
+        assertThat(result).hasSize(expectedSize)
+                .contains(String.format("valStr:%s", 0),
+                        String.format("valStr:%s", 1),
+                        String.format("valStr:%s", 2),
+                        String.format("valStr:%s", 3),
+                        String.format("valStr:%s", 4));
+    }
+
+    @Test
+    void dataTest() {
+        //given
+        var webTestClientForTest = webTestClient.mutate()
+                .responseTimeout(Duration.ofSeconds(20))
+                .build();
+
+        //when
+        var result = webTestClientForTest
+                .get().uri("/flux/ten")
+                .accept(MediaType.TEXT_EVENT_STREAM)
+                .exchange()
+                .expectStatus().isOk()
+                .returnResult(Integer.class)
+                .getResponseBody();
+
+        //then
+        var step = StepVerifier.create(result);
+        StepVerifier.Step<Integer> stepResult = null;
+        for (var idx = 1; idx <= 10; idx++) {
+            stepResult = step.expectNext(idx);
+        }
+        stepResult.verifyComplete();
+    }
+
+}

2024-11/spring-20-webflux/src/test/java/ru/otus/spring/rest/PersonControllerTest.java

@@ -0,0 +1,29 @@
+package ru.otus.spring.rest;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import ru.otus.spring.BaseContainerTest;
+
+@SpringBootTest
+class PersonControllerTest extends BaseContainerTest {
+
+    @Autowired
+    private RouterFunction<ServerResponse> route;
+
+    @Test
+    void testRoute() {
+        WebTestClient client = WebTestClient
+                .bindToRouterFunction(route)
+                .build();
+
+        client.get()
+                .uri("/func/person")
+                .exchange()
+                .expectStatus()
+                .isOk();
+    }
+}