spring-35-36

2025-09/spring-35-36-spring-cloud/.gitignore

@@ -0,0 +1,39 @@
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+!gradle-wrapper.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+# Ignore Gradle project-specific cache directory
+.gradle
+/buildSrc/.gradle/
+
+# Ignore Gradle build output directory
+build
+out
+
+#Idea
+*.iml
+*.iws
+*.ipr
+*.idea
+

2025-09/spring-35-36-spring-cloud/README.md

@@ -0,0 +1 @@
+# Spring Cloud example

2025-09/spring-35-36-spring-cloud/api-gateway/build.gradle.kts

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+plugins {
+    id("com.google.cloud.tools.jib")
+}
+
+dependencies {
+    implementation(project(":kafka-log-appender"))
+    implementation("net.logstash.logback:logstash-logback-encoder")
+    implementation("ch.qos.logback:logback-classic")
+
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("io.micrometer:micrometer-registry-prometheus")
+
+    implementation("org.springframework.cloud:spring-cloud-starter-config")
+    implementation("org.springframework.cloud:spring-cloud-starter-gateway")
+    implementation("org.springframework.cloud:spring-cloud-starter-netflix-eureka-client")
+
+    implementation("io.micrometer:micrometer-tracing-bridge-otel") // bridges the Micrometer Observation API to OpenTelemetry.
+    implementation("io.opentelemetry:opentelemetry-exporter-zipkin") // reports traces to Zipkin.
+}
+
+jib {
+    container {
+        creationTime.set("USE_CURRENT_TIMESTAMP")
+    }
+    from {
+        image = "bellsoft/liberica-openjdk-alpine-musl:21.0.1"
+    }
+
+    to {
+        image = "localrun/api-gateway"
+        tags = setOf(project.version.toString())
+    }
+}
+
+tasks {
+    build {
+        dependsOn(spotlessApply)
+        dependsOn(jibBuildTar)
+    }
+}

2025-09/spring-35-36-spring-cloud/api-gateway/runApiGateway.sh

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+#!/bin/bash
+
+../gradlew :api-gateway:build
+
+docker load --input build/jib-image.tar
+
+docker stop api-gateway
+
+docker run --rm -d --name api-gateway \
+--memory=512m \
+--cpus 1 \
+--network="host" \
+-v $HOME/.ssh:/root/.ssh \
+-e JAVA_TOOL_OPTIONS="-XX:InitialRAMPercentage=80 -XX:MaxRAMPercentage=80" \
+localrun/api-gateway:latest
+

2025-09/spring-35-36-spring-cloud/api-gateway/runLoad.sh

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+#!/bin/bash
+./hey -n=1000000 -c=1 -m GET http://localhost:7777/client/info?name=testClientName
+

2025-09/spring-35-36-spring-cloud/api-gateway/src/main/java/ru/demo/ApiGateway.java

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+package ru.demo;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ApiGateway {
+    private static final Logger log = LoggerFactory.getLogger(ApiGateway.class);
+
+    /*
+       curl -v http://localhost:7777/client/info?name=testClientName
+       curl -v http://localhost:7777/order/info?id=testOrderId
+
+    */
+
+    public static void main(String[] args) {
+        SpringApplication.run(ApiGateway.class, args);
+        log.info("SrvApiGateway started");
+    }
+}

2025-09/spring-35-36-spring-cloud/api-gateway/src/main/java/ru/demo/config/ApiConfig.java

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+package ru.demo.config;
+
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+import org.springframework.cloud.gateway.route.RouteLocator;
+import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import ru.demo.controller.XrequestFilter;
+
+@Configuration
+@EnableConfigurationProperties(ApplConfigProperties.class)
+@EnableDiscoveryClient
+public class ApiConfig {
+
+    @Bean
+    public XrequestFilter xrequestFilter() {
+        return new XrequestFilter();
+    }
+
+    @Bean
+    RouteLocator gateway(
+            RouteLocatorBuilder rlb, ApplConfigProperties applConfigProperties, XrequestFilter xrequestFilter) {
+        var routesBuilder = rlb.routes();
+        for (var route : applConfigProperties.getApiRoutes()) {
+            routesBuilder.route(route.id(), routeSpec -> routeSpec
+                    .path(String.format("/%s/**", route.from()))
+                    .filters(fs -> fs.filters(xrequestFilter)
+                            .rewritePath(String.format("/%s/(?<segment>.*)", route.from()), "/${segment}"))
+                    .uri(String.format("%s/@", route.to())));
+        }
+        return routesBuilder.build();
+    }
+}

2025-09/spring-35-36-spring-cloud/api-gateway/src/main/java/ru/demo/config/ApiRoute.java

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+package ru.demo.config;
+
+public record ApiRoute(String id, String from, String to) {}

2025-09/spring-35-36-spring-cloud/api-gateway/src/main/java/ru/demo/config/ApplConfigProperties.java

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+package ru.demo.config;
+
+import java.util.List;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.bind.ConstructorBinding;
+
+@ConfigurationProperties(prefix = "application")
+public class ApplConfigProperties {
+    private final String authHost;
+    private final List<ApiRoute> apiRoutes;
+
+    @ConstructorBinding
+    public ApplConfigProperties(String authHost, List<ApiRoute> apiRoutes) {
+        this.authHost = authHost;
+        this.apiRoutes = apiRoutes;
+    }
+
+    public String getAuthHost() {
+        return authHost;
+    }
+
+    public List<ApiRoute> getApiRoutes() {
+        return apiRoutes;
+    }
+
+    @Override
+    public String toString() {
+        return "ApplConfigProperties{" + "authHost='" + authHost + '\'' + ", apiRoutes=" + apiRoutes + '}';
+    }
+}

2025-09/spring-35-36-spring-cloud/api-gateway/src/main/java/ru/demo/controller/ErrorHandler.java

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+package ru.demo.controller;
+
+import java.net.ConnectException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.web.reactive.error.ErrorWebExceptionHandler;
+import org.springframework.core.annotation.Order;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Component;
+import org.springframework.web.server.ServerWebExchange;
+import reactor.core.publisher.Mono;
+import reactor.util.annotation.NonNull;
+
+@Order(-2)
+@Component
+public class ErrorHandler implements ErrorWebExceptionHandler {
+    private static final Logger log = LoggerFactory.getLogger(ErrorHandler.class);
+
+    @Override
+    public @NonNull Mono<Void> handle(@NonNull ServerWebExchange serverWebExchange, @NonNull Throwable thr) {
+        var bufferFactory = serverWebExchange.getResponse().bufferFactory();
+        var response = serverWebExchange.getResponse();
+        response.getHeaders().setContentType(MediaType.APPLICATION_JSON);
+
+        if (thr instanceof ConnectException) {
+            log.error("Target host connection error", thr);
+            response.setStatusCode(HttpStatus.SERVICE_UNAVAILABLE);
+            var dataBuffer = bufferFactory.wrap("Target host connection error".getBytes());
+            return response.writeWith(Mono.just(dataBuffer));
+        } else {
+            log.error("Unhandled exception", thr);
+            response.setStatusCode(HttpStatus.INTERNAL_SERVER_ERROR);
+            var dataBuffer = bufferFactory.wrap("Unhandled error".getBytes());
+            return response.writeWith(Mono.just(dataBuffer));
+        }
+    }
+}

2025-09/spring-35-36-spring-cloud/api-gateway/src/main/java/ru/demo/controller/XrequestFilter.java

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+package ru.demo.controller;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.cloud.gateway.filter.GatewayFilter;
+import org.springframework.cloud.gateway.filter.GatewayFilterChain;
+import org.springframework.web.server.ServerWebExchange;
+import reactor.core.publisher.Mono;
+
+public class XrequestFilter implements GatewayFilter {
+    private static final String HEADER_X_REQUEST_ID = "X-Request-Id";
+    private static final Logger log = LoggerFactory.getLogger(XrequestFilter.class);
+
+    @Override
+    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
+        var guid = java.util.UUID.randomUUID().toString();
+        log.info("requestId:{}", guid);
+
+        var request =
+                exchange.getRequest().mutate().header(HEADER_X_REQUEST_ID, guid).build();
+
+        return chain.filter(exchange.mutate().request(request).build());
+    }
+}

2025-09/spring-35-36-spring-cloud/api-gateway/src/main/resources/application.yml

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+spring:
+  application:
+    name: api-gateway
+  cloud:
+    config:
+      fail-fast: true
+      retry:
+        initial-interval: 5000
+        max-attempts: 10
+        max-interval: 5000
+        multiplier: 1.2
+  config:
+    import: optional:configserver:http://localhost:8888
+  codec:
+    max-in-memory-size: 10MB

2025-09/spring-35-36-spring-cloud/api-gateway/src/main/resources/logback.xml

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+<configuration scan="true" scanPeriod="10 seconds">
+    <jmxConfigurator />
+
+    <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>
+
+    <appender name="kafka" class="ru.appender.kafka.LogAppender">
+        <bootstrapServers>localhost:9092</bootstrapServers>
+        <topicName>applLogs</topicName>
+        <encoder class="net.logstash.logback.encoder.LogstashEncoder">
+            <fieldNames>
+                <version>[ignore]</version>
+            </fieldNames>
+            <customFields>{"appname":"api-gateway"}</customFields>
+        </encoder>
+    </appender>
+
+    <root level="info">
+        <appender-ref ref="STDOUT" />
+        <appender-ref ref="kafka" />
+    </root>
+</configuration>

2025-09/spring-35-36-spring-cloud/build.gradle.kts

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+import io.spring.gradle.dependencymanagement.dsl.DependencyManagementExtension
+import name.remal.gradle_plugins.sonarlint.SonarLintExtension
+import org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES
+import org.gradle.plugins.ide.idea.model.IdeaLanguageLevel
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
+
+plugins {
+    idea
+    id("fr.brouillard.oss.gradle.jgitver")
+    id("io.spring.dependency-management")
+    id("org.springframework.boot") apply false
+    id("name.remal.sonarlint") apply false
+    id("com.diffplug.spotless") apply false
+}
+
+allprojects {
+    group = "ru.demo"
+
+    repositories {
+        mavenLocal()
+        mavenCentral()
+    }
+
+    val springCloudVersion: String by project
+    val logbackEncoder: String by project
+
+    apply(plugin = "io.spring.dependency-management")
+    dependencyManagement {
+        dependencies {
+            imports {
+                mavenBom(BOM_COORDINATES)
+                mavenBom("org.springframework.cloud:spring-cloud-dependencies:$springCloudVersion")
+            }
+            dependency("net.logstash.logback:logstash-logback-encoder:$logbackEncoder")
+        }
+    }
+
+    configurations.all {
+        resolutionStrategy {
+            failOnVersionConflict()
+
+            force("org.glassfish.hk2.external:aopalliance-repackaged:3.1.1")
+            force("org.glassfish.hk2:hk2-utils:3.1.1")
+            force("commons-logging:commons-logging:1.3.1")
+            force("com.fasterxml.woodstox:woodstox-core:6.6.2")
+            force("org.glassfish.hk2:hk2-api:3.1.1")
+            force("org.apache.httpcomponents:httpclient:4.5.14")
+            force("org.sonarsource.analyzer-commons:sonar-analyzer-commons:2.11.0.2861")
+            force("org.sonarsource.analyzer-commons:sonar-xml-parsing:2.11.0.2861")
+            force("org.sonarsource.sslr:sslr-core:1.24.0.633")
+            force("org.sonarsource.analyzer-commons:sonar-analyzer-recognizers:2.11.0.2861")
+            force("commons-io:commons-io:2.15.1")
+            force("com.google.guava:guava:32.1.3-jre")
+            force("com.google.code.findbugs:jsr305:3.0.2")
+            force("org.codehaus.woodstox:stax2-api:4.2.2")
+            force("io.opentelemetry:opentelemetry-api-incubator:1.38.0-alpha")
+        }
+    }
+}
+
+subprojects {
+    plugins.apply(SpringBootPlugin::class.java)
+    plugins.apply(JavaPlugin::class.java)
+    extensions.configure<JavaPluginExtension> {
+        sourceCompatibility = JavaVersion.VERSION_21
+        targetCompatibility = JavaVersion.VERSION_21
+    }
+
+    tasks.withType<JavaCompile> {
+        options.encoding = "UTF-8"
+        options.compilerArgs.addAll(listOf("-Xlint:all,-serial,-processing"))
+
+        dependsOn("spotlessApply")
+    }
+
+    apply<name.remal.gradle_plugins.sonarlint.SonarLintPlugin>()
+    configure<SonarLintExtension> {
+        nodeJs {
+            detectNodeJs = false
+            logNodeJsNotFound = false
+        }
+    }
+    apply<com.diffplug.gradle.spotless.SpotlessPlugin>()
+    configure<com.diffplug.gradle.spotless.SpotlessExtension> {
+        java {
+            palantirJavaFormat("2.38.0")
+        }
+    }
+
+    plugins.apply(fr.brouillard.oss.gradle.plugins.JGitverPlugin::class.java)
+    extensions.configure<fr.brouillard.oss.gradle.plugins.JGitverPluginExtension> {
+        strategy("PATTERN")
+        nonQualifierBranches("main,master")
+        tagVersionPattern("\${v}\${<meta.DIRTY_TEXT}")
+        versionPattern(
+            "\${v}\${<meta.COMMIT_DISTANCE}\${<meta.GIT_SHA1_8}" +
+                    "\${<meta.QUALIFIED_BRANCH_NAME}\${<meta.DIRTY_TEXT}-SNAPSHOT"
+        )
+    }
+
+    tasks.withType<Test> {
+        useJUnitPlatform()
+        testLogging.showExceptions = true
+        reports {
+            junitXml.required.set(true)
+            html.required.set(true)
+        }
+    }
+}
+
+tasks {
+    val managedVersions by registering {
+        doLast {
+            project.extensions.getByType<DependencyManagementExtension>()
+                .managedVersions
+                .toSortedMap()
+                .map { "${it.key}:${it.value}" }
+                .forEach(::println)
+        }
+    }
+}

2025-09/spring-35-36-spring-cloud/config-server/build.gradle.kts

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+plugins {
+    id("com.google.cloud.tools.jib")
+}
+
+dependencies {
+    implementation(project(":kafka-log-appender"))
+    implementation("net.logstash.logback:logstash-logback-encoder")
+
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("io.micrometer:micrometer-registry-prometheus")
+
+    implementation ("org.springframework.cloud:spring-cloud-config-server")
+
+    implementation("io.micrometer:micrometer-tracing-bridge-otel") // bridges the Micrometer Observation API to OpenTelemetry.
+    implementation("io.opentelemetry:opentelemetry-exporter-zipkin") // reports traces to Zipkin.
+}
+
+jib {
+    container {
+        creationTime.set("USE_CURRENT_TIMESTAMP")
+    }
+    from {
+        image = "bellsoft/liberica-openjdk-alpine-musl:21.0.1"
+    }
+
+    to {
+        image = "localrun/config-server"
+        tags = setOf(project.version.toString())
+    }
+}
+
+tasks {
+    build {
+        dependsOn(spotlessApply)
+        dependsOn(jibBuildTar)
+    }
+}

2025-09/spring-35-36-spring-cloud/config-server/runConfigServer.sh

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+#!/bin/bash
+
+../gradlew :config-server:build
+
+docker load --input build/jib-image.tar
+
+docker stop config-server
+
+docker run --rm -d --name config-server \
+--memory=1024m \
+--cpus 1 \
+--network="host" \
+-v $HOME/.ssh:/root/.ssh \
+-e JAVA_TOOL_OPTIONS="-XX:InitialRAMPercentage=80 -XX:MaxRAMPercentage=80" \
+localrun/config-server:latest
+

2025-09/spring-35-36-spring-cloud/config-server/src/main/java/ru/demo/ConfigServer.java

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+package ru.demo;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.config.server.EnableConfigServer;
+
+@SpringBootApplication
+@EnableConfigServer
+public class ConfigServer {
+    private static final Logger log = LoggerFactory.getLogger(ConfigServer.class);
+
+    public static void main(String[] args) {
+
+        SpringApplication.run(ConfigServer.class, args);
+        log.info("ConfigServer started");
+    }
+}

2025-09/spring-35-36-spring-cloud/config-server/src/main/resources/application.yml

@@ -0,0 +1,40 @@
+server:
+  port: 8888
+
+spring:
+  application:
+    name: config-server
+  cloud:
+    config:
+      server:
+        git:
+          uri: "git@github.com:OtusTeam/Spring.git"
+          search-paths: "2025-09/spring-35-36-spring-cloud/git-config"
+          ignoreLocalSshSettings: false
+          strictHostKeyChecking: false
+          defaultLabel: "master"
+
+management:
+  tracing:
+    sampling:
+      probability: 1.0
+  endpoint:
+    prometheus:
+      enabled: true
+    metrics:
+      enabled: true
+    health:
+      enabled: true
+      probes:
+        enabled: true
+    refresh:
+      enabled: true
+  endpoints:
+    web:
+      exposure:
+        include:
+          - prometheus
+          - health
+          - metrics
+          - refresh
+    enabled-by-default: false

2025-09/spring-35-36-spring-cloud/config-server/src/main/resources/logback.xml

@@ -0,0 +1,25 @@
+<configuration scan="true" scanPeriod="10 seconds">
+    <jmxConfigurator />
+
+    <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>
+
+    <appender name="kafka" class="ru.appender.kafka.LogAppender">
+        <bootstrapServers>localhost:9092</bootstrapServers>
+        <topicName>applLogs</topicName>
+        <encoder class="net.logstash.logback.encoder.LogstashEncoder">
+            <fieldNames>
+                <version>[ignore]</version>
+            </fieldNames>
+            <customFields>{"appname":"config-server"}</customFields>
+        </encoder>
+    </appender>
+
+    <root level="info">
+        <appender-ref ref="STDOUT" />
+        <appender-ref ref="kafka" />
+    </root>
+</configuration>

2025-09/spring-35-36-spring-cloud/elk/docker-compose.yml

@@ -0,0 +1,149 @@
+
+services:
+  opensearch-node1:
+    image: opensearchproject/opensearch:2.18.0
+    container_name: opensearch-node1
+    environment:
+      - cluster.name=opensearch-cluster # Name the cluster
+      - node.name=opensearch-node1 # Name the node that will run in this container
+      - discovery.seed_hosts=opensearch-node1,opensearch-node2 # Nodes to look for when discovering the cluster
+      - cluster.initial_cluster_manager_nodes=opensearch-node1,opensearch-node2 # Nodes eligibile to serve as cluster manager
+      - bootstrap.memory_lock=true # Disable JVM heap memory swapping
+      - "OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m" # Set min and max JVM heap sizes to at least 50% of system RAM
+      - "DISABLE_INSTALL_DEMO_CONFIG=true" # Prevents execution of bundled demo script which installs demo certificates and security configurations to OpenSearch
+      - "DISABLE_SECURITY_PLUGIN=true" # Disables Security plugin
+    ulimits:
+      memlock:
+        soft: -1 # Set memlock to unlimited (no soft or hard limit)
+        hard: -1
+      nofile:
+        soft: 65536 # Maximum number of open files for the opensearch user - set to at least 65536
+        hard: 65536
+    volumes:
+      - opensearch-data1:/usr/share/opensearch/data # Creates volume called opensearch-data1 and mounts it to the container
+    ports:
+      - 9200:9200 # REST API
+      - 9600:9600 # Performance Analyzer
+    networks:
+      - opensearch-net # All of the containers will join the same Docker bridge network
+  opensearch-node2:
+    image: opensearchproject/opensearch:2.18.0
+    container_name: opensearch-node2
+    environment:
+      - cluster.name=opensearch-cluster # Name the cluster
+      - node.name=opensearch-node2 # Name the node that will run in this container
+      - discovery.seed_hosts=opensearch-node1,opensearch-node2 # Nodes to look for when discovering the cluster
+      - cluster.initial_cluster_manager_nodes=opensearch-node1,opensearch-node2 # Nodes eligibile to serve as cluster manager
+      - bootstrap.memory_lock=true # Disable JVM heap memory swapping
+      - "OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m" # Set min and max JVM heap sizes to at least 50% of system RAM
+      - "DISABLE_INSTALL_DEMO_CONFIG=true" # Prevents execution of bundled demo script which installs demo certificates and security configurations to OpenSearch
+      - "DISABLE_SECURITY_PLUGIN=true" # Disables Security plugin
+    ulimits:
+      memlock:
+        soft: -1 # Set memlock to unlimited (no soft or hard limit)
+        hard: -1
+      nofile:
+        soft: 65536 # Maximum number of open files for the opensearch user - set to at least 65536
+        hard: 65536
+    volumes:
+      - opensearch-data2:/usr/share/opensearch/data # Creates volume called opensearch-data2 and mounts it to the container
+    networks:
+      - opensearch-net # All of the containers will join the same Docker bridge network
+  opensearch-dashboards:
+    image: opensearchproject/opensearch-dashboards:2.18.0
+    container_name: opensearch-dashboards
+    ports:
+      - 5601:5601 # Map host port 5601 to container port 5601
+    expose:
+      - "5601" # Expose port 5601 for web access to OpenSearch Dashboards
+    environment:
+      - 'OPENSEARCH_HOSTS=["http://opensearch-node1:9200","http://opensearch-node2:9200"]'
+      - "DISABLE_SECURITY_DASHBOARDS_PLUGIN=true" # disables security dashboards plugin in OpenSearch Dashboards
+    networks:
+      - opensearch-net
+
+#logstash
+
+  logstash:
+    image: opensearchproject/logstash-oss-with-opensearch-output-plugin:7.16.2
+    container_name: logstash
+    volumes:
+      - ./logstash.conf:/usr/share/logstash/pipeline/logstash.conf
+    networks:
+      - opensearch-net
+
+  zookeeper:
+    image: confluentinc/cp-zookeeper:6.2.0
+    container_name: zookeeper
+    environment:
+      ZOOKEEPER_CLIENT_PORT: 2181
+      ZOOKEEPER_TICK_TIME: 2000
+    networks:
+      - opensearch-net
+
+  broker:
+    image: confluentinc/cp-kafka:7.0.0
+    container_name: broker
+    ports:
+      - "9092:9092"
+    depends_on:
+      - zookeeper
+    environment:
+      KAFKA_BROKER_ID: 1
+      KAFKA_ZOOKEEPER_CONNECT: 'zookeeper:2181'
+      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_INTERNAL:PLAINTEXT
+      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092,PLAINTEXT_INTERNAL://broker:29092
+      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
+      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
+      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
+    networks:
+      - opensearch-net
+
+  kafka-ui:
+    container_name: kafka-ui
+    image: provectuslabs/kafka-ui:latest
+    network_mode: "host"
+    environment:
+      DYNAMIC_CONFIG_ENABLED: 'true'
+      KAFKA_CLUSTERS_0_NAME: local
+      KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS: localhost:9092
+    deploy:
+      resources:
+        limits:
+          memory: "256M"
+
+  zipkin:
+    container_name: zipkin
+    image: openzipkin/zipkin:3
+    network_mode: "host"
+    expose:
+      - "9411"
+
+  prometheus:
+    image: bitnami/prometheus:3.0.1
+    container_name: prometheus
+    network_mode: "host"
+    expose:
+      - "9090"
+    volumes:
+      - type: bind
+        source: ./prometheus.yml
+        target: /etc/prometheus/prometheus.yml
+
+  grafana:
+    image: grafana/grafana-enterprise:11.4.0
+    container_name: grafana
+    network_mode: "host"
+    expose:
+      - "3000"
+    environment:
+      GF_SECURITY_ADMIN_USER: "grafana"
+      GF_SECURITY_ADMIN_PASSWORD: "grafana"
+
+
+volumes:
+  opensearch-data1:
+  opensearch-data2:
+
+networks:
+  opensearch-net:

2025-09/spring-35-36-spring-cloud/elk/logstash.conf

@@ -0,0 +1,24 @@
+input {
+  http {
+    id => "test_http_plugin_id"
+    host => "127.0.0.1"
+    port => 8080
+  }
+
+  kafka {
+    bootstrap_servers => "broker:29092"
+    topics => "applLogs"
+    codec => "json"
+  }
+}
+
+output {
+  opensearch {
+    hosts       => "http://opensearch-node1:9200"
+    user        => "admin"
+    password    => "admin"
+    index       => "logstash-logs-%{+YYYY.MM.dd}"
+    ssl_certificate_verification => false
+    ssl => false
+  }
+}

2025-09/spring-35-36-spring-cloud/elk/prometheus.yml

@@ -0,0 +1,11 @@
+# JVM (Micrometer) Grafana dashboard: 4701
+global:
+  scrape_interval:     10s
+  evaluation_interval: 15s
+
+scrape_configs:
+  - job_name: service-client
+    metrics_path: '/actuator/prometheus'
+    scrape_interval: 5s
+    static_configs:
+      - targets: ['localhost:8081']

2025-09/spring-35-36-spring-cloud/eureka-server/build.gradle.kts

@@ -0,0 +1,38 @@
+plugins {
+    id("com.google.cloud.tools.jib")
+}
+
+dependencies {
+    implementation(project(":kafka-log-appender"))
+    implementation("net.logstash.logback:logstash-logback-encoder")
+
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("io.micrometer:micrometer-registry-prometheus")
+
+    implementation("org.springframework.cloud:spring-cloud-starter-config")
+    implementation ("org.springframework.cloud:spring-cloud-starter-netflix-eureka-server")
+
+    implementation("io.micrometer:micrometer-tracing-bridge-otel") // bridges the Micrometer Observation API to OpenTelemetry.
+    implementation("io.opentelemetry:opentelemetry-exporter-zipkin") // reports traces to Zipkin.
+}
+
+jib {
+    container {
+        creationTime.set("USE_CURRENT_TIMESTAMP")
+    }
+    from {
+        image = "bellsoft/liberica-openjdk-alpine-musl:21.0.1"
+    }
+
+    to {
+        image = "localrun/eureka-server"
+        tags = setOf(project.version.toString())
+    }
+}
+
+tasks {
+    build {
+        dependsOn(spotlessApply)
+        dependsOn(jibBuildTar)
+    }
+}

2025-09/spring-35-36-spring-cloud/eureka-server/runEurekaServer.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+../gradlew :eureka-server:build
+
+docker load --input build/jib-image.tar
+
+docker stop eureka-server
+
+
+docker run --rm -d --name eureka-server \
+--memory=512m \
+--cpus 1 \
+--network="host" \
+-v $HOME/.ssh:/root/.ssh \
+-e JAVA_TOOL_OPTIONS="-XX:InitialRAMPercentage=80 -XX:MaxRAMPercentage=80" \
+localrun/eureka-server:latest
+
+

2025-09/spring-35-36-spring-cloud/eureka-server/src/main/java/ru/demo/EurekaServer.java

@@ -0,0 +1,19 @@
+package ru.demo;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
+
+@SpringBootApplication
+@EnableEurekaServer
+public class EurekaServer {
+    private static final Logger log = LoggerFactory.getLogger(EurekaServer.class);
+
+    public static void main(String[] args) {
+
+        SpringApplication.run(EurekaServer.class, args);
+        log.info("EurekaServer started");
+    }
+}

2025-09/spring-35-36-spring-cloud/eureka-server/src/main/resources/application.yml

@@ -0,0 +1,17 @@
+spring:
+  application:
+    name: eureka-server
+  cloud:
+    config:
+      fail-fast: true
+      retry:
+        initial-interval: 5000
+        max-attempts: 10
+        max-interval: 5000
+        multiplier: 1.2
+  config:
+    import: optional:configserver:http://localhost:8888
+  codec:
+    max-in-memory-size: 10MB
+
+

2025-09/spring-35-36-spring-cloud/eureka-server/src/main/resources/logback.xml

@@ -0,0 +1,25 @@
+<configuration scan="true" scanPeriod="10 seconds">
+    <jmxConfigurator />
+
+    <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>
+
+    <appender name="kafka" class="ru.appender.kafka.LogAppender">
+        <bootstrapServers>localhost:9092</bootstrapServers>
+        <topicName>applLogs</topicName>
+        <encoder class="net.logstash.logback.encoder.LogstashEncoder">
+            <fieldNames>
+                <version>[ignore]</version>
+            </fieldNames>
+            <customFields>{"appname":"eureka-server"}</customFields>
+        </encoder>
+    </appender>
+
+    <root level="info">
+        <appender-ref ref="STDOUT" />
+        <appender-ref ref="kafka" />
+    </root>
+</configuration>

2025-09/spring-35-36-spring-cloud/git-config/api-gateway.yml

@@ -0,0 +1,16 @@
+server:
+  port: 7777
+
+application:
+  api-routes:
+    - id: "service-client"
+      from: "client"
+      to: "lb://SERVICE-CLIENT"
+    - id: "service-order"
+      from: "order"
+      to: "lb://SERVICE-ORDER"
+
+eureka:
+  client:
+    registerWithEureka: false
+    fetchRegistry: true

2025-09/spring-35-36-spring-cloud/git-config/application.yml

@@ -0,0 +1,36 @@
+management:
+  tracing:
+    sampling:
+      probability: 1.0
+  endpoint:
+    prometheus:
+      enabled: true
+    metrics:
+      enabled: true
+    health:
+      enabled: true
+      probes:
+        enabled: true
+    refresh:
+      enabled: true
+  endpoints:
+    web:
+      exposure:
+        include:
+          - prometheus
+          - health
+          - metrics
+          - refresh
+    enabled-by-default: false
+  metrics:
+    tags:
+      application: ${spring.application.name}
+
+eureka:
+  client:
+    serviceUrl:
+      defaultZone: http://localhost:9999/eureka/
+  instance:
+    lease-renewal-interval-in-seconds: 30
+    metadataMap:
+      zone: zone1

2025-09/spring-35-36-spring-cloud/git-config/eureka-server.yml

@@ -0,0 +1,14 @@
+server:
+  port: 9999
+
+eureka:
+  server:
+    renewal-percent-threshold: 0.5
+  instance:
+    hostname: localhost
+    lease-expiration-duration-in-seconds: 90
+  client:
+    registerWithEureka: false
+    fetchRegistry: false
+    serviceUrl:
+      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

2025-09/spring-35-36-spring-cloud/git-config/service-client-info.yml

@@ -0,0 +1,6 @@
+server:
+  port: 8083
+
+eureka:
+  client:
+    fetchRegistry: false

2025-09/spring-35-36-spring-cloud/git-config/service-client.yml

@@ -0,0 +1,6 @@
+server:
+  port: 8081
+
+eureka:
+  client:
+    fetchRegistry: true

2025-09/spring-35-36-spring-cloud/git-config/service-order.yml

@@ -0,0 +1,8 @@
+server:
+  port: 8082
+
+eureka:
+  client:
+    fetchRegistry: false
+  instance:
+    instance-id: service-order:${spring.application.instance_id:0}

2025-09/spring-35-36-spring-cloud/gradle.properties

@@ -0,0 +1,15 @@
+# -------Gradle--------
+org.gradle.jvmargs=-Xmx4g
+org.gradle.daemon=true
+org.gradle.parallel=true
+# -------Plugins---------
+jgitver=0.10.0-rc03
+dependencyManagement=1.1.5
+springframeworkBoot=3.3.1
+springCloudVersion=2023.0.3
+
+sonarlint=4.2.4
+spotless=6.25.0
+jib=3.4.5
+# -------Versions--------
+logbackEncoder=8.0

2025-09/spring-35-36-spring-cloud/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

2025-09/spring-35-36-spring-cloud/gradlew

@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original 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.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$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=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

2025-09/spring-35-36-spring-cloud/gradlew.bat

@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem 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, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

2025-09/spring-35-36-spring-cloud/kafka-log-appender/build.gradle.kts

@@ -0,0 +1,10 @@
+dependencies {
+    implementation("ch.qos.logback:logback-classic")
+    implementation ("org.apache.kafka:kafka-clients")
+}
+
+tasks {
+    bootJar {
+        enabled = false
+    }
+}

2025-09/spring-35-36-spring-cloud/kafka-log-appender/src/main/java/ru/appender/kafka/AppenderException.java

@@ -0,0 +1,8 @@
+package ru.appender.kafka;
+
+public class AppenderException extends RuntimeException {
+
+    public AppenderException(String message) {
+        super(message);
+    }
+}

2025-09/spring-35-36-spring-cloud/kafka-log-appender/src/main/java/ru/appender/kafka/ErrorMsgConsumer.java

@@ -0,0 +1,5 @@
+package ru.appender.kafka;
+
+import java.util.function.Consumer;
+
+public interface ErrorMsgConsumer extends Consumer<String> {}

2025-09/spring-35-36-spring-cloud/kafka-log-appender/src/main/java/ru/appender/kafka/LogAppender.java

@@ -0,0 +1,84 @@
+package ru.appender.kafka;
+
+import ch.qos.logback.classic.spi.LoggingEvent;
+import ch.qos.logback.core.UnsynchronizedAppenderBase;
+import ch.qos.logback.core.encoder.Encoder;
+import java.util.Queue;
+import java.util.concurrent.ArrayBlockingQueue;
+
+public class LogAppender extends UnsynchronizedAppenderBase<LoggingEvent> {
+    private static final String MESSAGE_TEMPLATE = "[Kafka appender] %s";
+
+    private String bootstrapServers;
+    private String topicName;
+
+    private final Queue<LoggingEvent> eventsQueue = new ArrayBlockingQueue<>(1000);
+
+    private Thread senderThread;
+    private Encoder<LoggingEvent> encoder;
+
+    private final ErrorMsgConsumer errorMsgConsumer = error -> addError(String.format(MESSAGE_TEMPLATE, error));
+
+    public void setEncoder(Encoder<LoggingEvent> encoder) {
+        this.encoder = encoder;
+    }
+
+    public void setBootstrapServers(String bootstrapServers) {
+        this.bootstrapServers = bootstrapServers;
+        addInfo(String.format(MESSAGE_TEMPLATE, "set bootstrapServers:" + bootstrapServers));
+    }
+
+    public void setTopicName(String topicName) {
+        this.topicName = topicName;
+        addInfo(String.format(MESSAGE_TEMPLATE, "set topicName:" + topicName));
+    }
+
+    @Override
+    public void start() {
+        if (bootstrapServers == null) {
+            addError(String.format(MESSAGE_TEMPLATE, "bootstrapServers is null"));
+            return;
+        }
+
+        if (topicName == null) {
+            addError(String.format(MESSAGE_TEMPLATE, "topicName is null"));
+            return;
+        }
+        var logProducer = new LogProducer(bootstrapServers, topicName);
+
+        senderThread = Thread.ofVirtual().name("senderThread").start(() -> sendMessages(logProducer));
+        super.start();
+        addInfo(String.format(MESSAGE_TEMPLATE, "started"));
+    }
+
+    @Override
+    public void stop() {
+        super.stop();
+        if (senderThread != null) {
+            senderThread.interrupt();
+        }
+        addInfo(String.format(MESSAGE_TEMPLATE, "stopped"));
+    }
+
+    @Override
+    public void append(LoggingEvent eventObject) {
+        var result = eventsQueue.offer(eventObject);
+        if (!result) {
+            addWarn(String.format(MESSAGE_TEMPLATE, "eventsQueue is full"));
+        }
+    }
+
+    private void sendMessages(LogProducer logProducer) {
+        while (!Thread.currentThread().isInterrupted()) {
+            var event = eventsQueue.poll();
+            if (event != null) {
+                try {
+                    var messageAsText = new String(encoder.encode(event));
+                    logProducer.send(messageAsText, errorMsgConsumer);
+                } catch (Exception ex) {
+                    addError(String.format(MESSAGE_TEMPLATE, ex.getMessage()));
+                }
+            }
+        }
+    }
+}

2025-09/spring-35-36-spring-cloud/kafka-log-appender/src/main/java/ru/appender/kafka/LogProducer.java

@@ -0,0 +1,56 @@
+package ru.appender.kafka;
+
+import static org.apache.kafka.clients.CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG;
+import static org.apache.kafka.clients.CommonClientConfigs.CLIENT_ID_CONFIG;
+import static org.apache.kafka.clients.CommonClientConfigs.RETRIES_CONFIG;
+import static org.apache.kafka.clients.producer.ProducerConfig.ACKS_CONFIG;
+import static org.apache.kafka.clients.producer.ProducerConfig.BATCH_SIZE_CONFIG;
+import static org.apache.kafka.clients.producer.ProducerConfig.BUFFER_MEMORY_CONFIG;
+import static org.apache.kafka.clients.producer.ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG;
+import static org.apache.kafka.clients.producer.ProducerConfig.LINGER_MS_CONFIG;
+import static org.apache.kafka.clients.producer.ProducerConfig.MAX_BLOCK_MS_CONFIG;
+import static org.apache.kafka.clients.producer.ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG;
+
+import java.util.Properties;
+import java.util.function.Consumer;
+import org.apache.kafka.clients.producer.KafkaProducer;
+import org.apache.kafka.clients.producer.ProducerRecord;
+import org.apache.kafka.common.serialization.StringSerializer;
+
+public class LogProducer {
+    private final KafkaProducer<String, String> kafkaProducer;
+    private final String topicName;
+    private long lastSendKey = System.currentTimeMillis();
+
+    public LogProducer(String bootstrapServers, String topicName) {
+        this.topicName = topicName;
+        Properties props = new Properties();
+        props.put(CLIENT_ID_CONFIG, "myKafkaProducer");
+        props.put(BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
+        props.put(ACKS_CONFIG, "1");
+        props.put(RETRIES_CONFIG, 1);
+        props.put(BATCH_SIZE_CONFIG, 16384);
+        props.put(LINGER_MS_CONFIG, 10);
+        props.put(BUFFER_MEMORY_CONFIG, 33_554_432); // bytes
+        props.put(MAX_BLOCK_MS_CONFIG, 1_000); // ms
+        props.put(KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
+        props.put(VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
+
+        kafkaProducer = new KafkaProducer<>(props);
+
+        Runtime.getRuntime().addShutdownHook(new Thread(this::close));
+    }
+
+    public void send(String value, Consumer<String> errorCallback) {
+        var key = lastSendKey++;
+        kafkaProducer.send(new ProducerRecord<>(topicName, String.valueOf(key), value), (metadata, exception) -> {
+            if (exception != null) {
+                errorCallback.accept(String.format(exception.getMessage()));
+            }
+        });
+    }
+
+    public void close() {
+        kafkaProducer.close();
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client-info/build.gradle.kts

@@ -0,0 +1,14 @@
+dependencies {
+    implementation(project(":kafka-log-appender"))
+    implementation("net.logstash.logback:logstash-logback-encoder")
+
+    implementation ("org.springframework.boot:spring-boot-starter-web")
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("io.micrometer:micrometer-registry-prometheus")
+
+    implementation("org.springframework.cloud:spring-cloud-starter-config")
+    implementation("org.springframework.cloud:spring-cloud-starter-netflix-eureka-client")
+
+    implementation("io.micrometer:micrometer-tracing-bridge-otel") // bridges the Micrometer Observation API to OpenTelemetry.
+    implementation("io.opentelemetry:opentelemetry-exporter-zipkin") // reports traces to Zipkin.
+}

2025-09/spring-35-36-spring-cloud/service-client-info/src/main/java/ru/demo/ServiceClientInfo.java

@@ -0,0 +1,11 @@
+package ru.demo;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+
+@SpringBootApplication
+public class ServiceClientInfo {
+    public static void main(String[] args) {
+        new SpringApplicationBuilder().sources(ServiceClientInfo.class).run(args);
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client-info/src/main/java/ru/demo/config/ApplConf.java

@@ -0,0 +1,19 @@
+package ru.demo.config;
+
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.filter.OncePerRequestFilter;
+import ru.demo.filter.MdcFilter;
+
+@Configuration
+public class ApplConf {
+
+    @Bean
+    public FilterRegistrationBean<OncePerRequestFilter> mdcFilterRegistrationBean() {
+        var registrationBean = new FilterRegistrationBean<OncePerRequestFilter>();
+        registrationBean.setFilter(new MdcFilter());
+        registrationBean.setOrder(1);
+        return registrationBean;
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client-info/src/main/java/ru/demo/controller/ClientInfoController.java

@@ -0,0 +1,30 @@
+package ru.demo.controller;
+
+import java.time.Duration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import ru.demo.model.ClientData;
+
+@RestController
+public class ClientInfoController {
+    private static final Logger logger = LoggerFactory.getLogger(ClientInfoController.class);
+
+    // curl -v http://localhost:8083/additional-info?name="testClient"
+
+    // docker run -d --rm -p 9411:9411 openzipkin/zipkin
+    // http://localhost:9411
+
+    @GetMapping(value = "/additional-info")
+    public ClientData info(@RequestParam(name = "name") String name) throws InterruptedException {
+        logger.info("request. name:{}", name);
+        doJob();
+        return new ClientData(String.format("additional ClientInfo name:%s", name));
+    }
+
+    private void doJob() throws InterruptedException {
+        Thread.sleep(Duration.ofMillis(100));
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client-info/src/main/java/ru/demo/filter/MdcFilter.java

@@ -0,0 +1,39 @@
+package ru.demo.filter;
+
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.ArrayList;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+public class MdcFilter extends OncePerRequestFilter {
+    private final Logger log = LoggerFactory.getLogger(MdcFilter.class);
+    private static final String HEADER_X_REQUEST_ID = "X-Request-Id";
+    private static final String MDC_REQUEST_ID = "requestId";
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
+            throws ServletException, IOException {
+        var xRequestId = request.getHeader(HEADER_X_REQUEST_ID);
+        log.info("method:{}, xRequestId:{}", request.getMethod(), xRequestId);
+        if (xRequestId != null) {
+            MDC.put(MDC_REQUEST_ID, xRequestId);
+        }
+
+        var headerIterator = request.getHeaderNames().asIterator();
+        var headers = new ArrayList<String>();
+        while (headerIterator.hasNext()) {
+            headers.add(headerIterator.next());
+        }
+        log.info("request headers:{}", headers);
+
+        response.addHeader(HEADER_X_REQUEST_ID, xRequestId);
+        filterChain.doFilter(request, response);
+        MDC.remove(MDC_REQUEST_ID);
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client-info/src/main/java/ru/demo/model/ClientData.java

@@ -0,0 +1,3 @@
+package ru.demo.model;
+
+public record ClientData(String data) {}

2025-09/spring-35-36-spring-cloud/service-client-info/src/main/resources/application.yml

@@ -0,0 +1,16 @@
+spring:
+  application:
+    name: service-client-info
+  cloud:
+    config:
+      fail-fast: true
+      retry:
+        initial-interval: 5000
+        max-attempts: 10
+        max-interval: 5000
+        multiplier: 1.2
+  config:
+    import: optional:configserver:http://localhost:8888
+  codec:
+    max-in-memory-size: 10MB
+

2025-09/spring-35-36-spring-cloud/service-client-info/src/main/resources/logback.xml

@@ -0,0 +1,26 @@
+<configuration scan="true" scanPeriod="10 seconds">
+    <jmxConfigurator />
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - [%X{requestId}] %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <appender name="kafka" class="ru.appender.kafka.LogAppender">
+        <bootstrapServers>localhost:9092</bootstrapServers>
+        <topicName>applLogs</topicName>
+        <encoder class="net.logstash.logback.encoder.LogstashEncoder">
+            <fieldNames>
+                <version>[ignore]</version>
+            </fieldNames>
+            <customFields>{"appname":"service-client-info"}</customFields>
+            <includeMdcKeyName>requestId</includeMdcKeyName>
+        </encoder>
+    </appender>
+
+    <root level="info">
+        <appender-ref ref="STDOUT" />
+        <appender-ref ref="kafka" />
+    </root>
+</configuration>

2025-09/spring-35-36-spring-cloud/service-client/build.gradle.kts

@@ -0,0 +1,19 @@
+dependencies {
+    implementation(project(":kafka-log-appender"))
+    implementation("net.logstash.logback:logstash-logback-encoder")
+
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("io.micrometer:micrometer-registry-prometheus")
+
+    implementation("org.springframework.boot:spring-boot-starter-web")
+
+    implementation("org.springframework.cloud:spring-cloud-starter-config")
+    implementation("org.springframework.cloud:spring-cloud-starter-netflix-eureka-client")
+    implementation("org.springframework.cloud:spring-cloud-starter-openfeign")
+
+    implementation("io.micrometer:micrometer-tracing-bridge-otel") // bridges the Micrometer Observation API to OpenTelemetry.
+    implementation("io.opentelemetry:opentelemetry-exporter-zipkin") // reports traces to Zipkin.
+    implementation("io.github.openfeign:feign-micrometer")
+
+    implementation("org.springframework.cloud:spring-cloud-starter-circuitbreaker-resilience4j")
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/ServiceClient.java

@@ -0,0 +1,12 @@
+package ru.demo;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+
+@SpringBootApplication
+public class ServiceClient {
+    public static void main(String[] args) {
+
+        new SpringApplicationBuilder().sources(ServiceClient.class).run(args);
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/config/RequestEncoder.java

@@ -0,0 +1,23 @@
+package ru.demo.config;
+
+import feign.RequestTemplate;
+import feign.codec.EncodeException;
+import feign.codec.Encoder;
+import java.lang.reflect.Type;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class RequestEncoder implements Encoder {
+    private static final Logger log = LoggerFactory.getLogger(RequestEncoder.class);
+    private final Encoder defaultEncoder;
+
+    public RequestEncoder(Encoder defaultEncoder) {
+        this.defaultEncoder = defaultEncoder;
+    }
+
+    @Override
+    public void encode(Object object, Type bodyType, RequestTemplate template) throws EncodeException {
+        log.info("encode value:{}", object);
+        defaultEncoder.encode(object, bodyType, template);
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/config/ResponseDecoder.java

@@ -0,0 +1,30 @@
+package ru.demo.config;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import feign.FeignException;
+import feign.Response;
+import feign.codec.Decoder;
+import java.io.IOException;
+import java.lang.reflect.Type;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import ru.demo.model.ClientData;
+
+public class ResponseDecoder implements Decoder {
+    private static final Logger log = LoggerFactory.getLogger(ResponseDecoder.class);
+
+    private final Decoder defaultDecoder;
+    private final ObjectMapper mapper;
+
+    public ResponseDecoder(Decoder defaultDecoder, ObjectMapper mapper) {
+        this.defaultDecoder = defaultDecoder;
+        this.mapper = mapper;
+    }
+
+    @Override
+    public ClientData decode(Response response, Type type) throws IOException, FeignException {
+        var responseAsString = (String) defaultDecoder.decode(response, String.class);
+        log.info("response:{}", responseAsString);
+        return mapper.readValue(responseAsString, ClientData.class);
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/config/ServiceClientApplConf.java

@@ -0,0 +1,106 @@
+package ru.demo.config;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.json.JsonMapper;
+import feign.Contract;
+import feign.Feign;
+import feign.Logger;
+import feign.Retryer;
+import feign.codec.Decoder;
+import feign.codec.Encoder;
+import feign.micrometer.MicrometerCapability;
+import feign.micrometer.MicrometerObservationCapability;
+import io.github.resilience4j.circuitbreaker.CircuitBreakerConfig;
+import io.github.resilience4j.ratelimiter.RateLimiter;
+import io.github.resilience4j.ratelimiter.RateLimiterConfig;
+import io.github.resilience4j.timelimiter.TimeLimiterConfig;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.observation.ObservationRegistry;
+import java.time.Duration;
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
+import org.springframework.cloud.circuitbreaker.resilience4j.Resilience4JCircuitBreakerFactory;
+import org.springframework.cloud.circuitbreaker.resilience4j.Resilience4JConfigBuilder;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
+import org.springframework.cloud.client.circuitbreaker.Customizer;
+import org.springframework.cloud.openfeign.FeignClientsConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.web.filter.OncePerRequestFilter;
+import ru.demo.controller.ClientAdditionalInfoClient;
+import ru.demo.filter.MdcFilter;
+import ru.demo.metrics.MetricsManager;
+import ru.demo.metrics.MicrometerMetricsManager;
+
+@Configuration
+@Import(FeignClientsConfiguration.class)
+public class ServiceClientApplConf {
+
+    @Bean
+    public RateLimiterConfig rateLimiterConfig() {
+        return RateLimiterConfig.custom()
+                .timeoutDuration(Duration.ofMillis(100))
+                .limitRefreshPeriod(Duration.ofSeconds(1))
+                .limitForPeriod(1000)
+                .build();
+    }
+
+    @Bean
+    public RateLimiter rateLimiter(RateLimiterConfig config) {
+        return RateLimiter.of("defaultRateLimiter", config);
+    }
+
+    @Bean
+    public Customizer<Resilience4JCircuitBreakerFactory> defaultCustomizer() {
+        return factory -> factory.configureDefault(id -> new Resilience4JConfigBuilder(id)
+                .timeLimiterConfig(TimeLimiterConfig.custom()
+                        .timeoutDuration(Duration.ofSeconds(5))
+                        .build())
+                .circuitBreakerConfig(CircuitBreakerConfig.ofDefaults())
+                .build());
+    }
+
+    @Bean
+    public CircuitBreaker circuitBreaker(CircuitBreakerFactory<?, ?> circuitBreakerFactory) {
+        return circuitBreakerFactory.create("defaultCircuitBreaker");
+    }
+
+    @Bean
+    public FilterRegistrationBean<OncePerRequestFilter> mdcFilterRegistrationBean() {
+        var registrationBean = new FilterRegistrationBean<OncePerRequestFilter>();
+        registrationBean.setFilter(new MdcFilter());
+        registrationBean.setOrder(1);
+        return registrationBean;
+    }
+
+    @Bean
+    public ObjectMapper objectMapper() {
+        return JsonMapper.builder().build();
+    }
+
+    @Bean
+    public ClientAdditionalInfoClient clientAdditionalInfoClient(
+            Decoder decoder,
+            Encoder encoder,
+            Contract contract,
+            ObjectMapper mapper,
+            MeterRegistry meterRegistry,
+            ObservationRegistry observationRegistry) {
+
+        return Feign.builder()
+                .encoder(new RequestEncoder(encoder))
+                .decoder(new ResponseDecoder(decoder, mapper))
+                .contract(contract)
+                .logLevel(Logger.Level.FULL)
+                .addCapability(new MicrometerObservationCapability(observationRegistry)) // <-- THIS IS NEW
+                .addCapability(new MicrometerCapability(meterRegistry)) // <-- THIS IS NEW
+                .retryer(new Retryer.Default(500, 5_000, 10))
+                .target(ClientAdditionalInfoClient.class, "http");
+    }
+
+    @Bean
+    public MetricsManager micrometerMetricsManager(MeterRegistry meterRegistry) {
+        return new MicrometerMetricsManager(meterRegistry);
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/controller/ClientAdditionalInfoClient.java

@@ -0,0 +1,16 @@
+package ru.demo.controller;
+
+import static ru.demo.filter.MdcFilter.HEADER_X_REQUEST_ID;
+
+import java.net.URI;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestParam;
+import ru.demo.model.ClientData;
+
+public interface ClientAdditionalInfoClient {
+
+    @GetMapping(value = "/additional-info", consumes = "application/json")
+    ClientData additionalInfo(
+            @RequestHeader(HEADER_X_REQUEST_ID) String xRequestId, URI baseUri, @RequestParam("name") String nameVal);
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/controller/ClientController.java

@@ -0,0 +1,90 @@
+package ru.demo.controller;
+
+import static ru.demo.filter.MdcFilter.MDC_REQUEST_ID;
+import static ru.demo.metrics.Meter.REQUEST_COUNTER;
+
+import com.netflix.discovery.EurekaClient;
+import io.github.resilience4j.core.functions.CheckedFunction;
+import io.github.resilience4j.ratelimiter.RateLimiter;
+import java.net.URI;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import ru.demo.metrics.Meter;
+import ru.demo.metrics.MetricsManager;
+import ru.demo.model.RequestForData;
+
+@RestController
+public class ClientController {
+    private static final Logger log = LoggerFactory.getLogger(ClientController.class);
+
+    private final MetricsManager metricsManager;
+    private final ClientAdditionalInfoClient clientAdditionalInfoClient;
+    private final EurekaClient discoveryClient;
+    private final CheckedFunction<RequestForData, String> getAdditionalInfoFunction;
+
+    // curl -v -H "X-Request-Id: 123" http://localhost:8081/info?name="testClient"
+
+    public ClientController(
+            MetricsManager metricsManager,
+            ClientAdditionalInfoClient clientAdditionalInfoClient,
+            EurekaClient discoveryClient,
+            CircuitBreaker circuitBreaker,
+            RateLimiter rateLimiter) {
+        this.metricsManager = metricsManager;
+        this.clientAdditionalInfoClient = clientAdditionalInfoClient;
+        this.discoveryClient = discoveryClient;
+
+        this.getAdditionalInfoFunction = RateLimiter.decorateCheckedFunction(
+                rateLimiter,
+                requestForData -> circuitBreaker.run(() -> doRequest(requestForData), t -> {
+                    log.error("delay call failed error:{}", t.getMessage());
+                    return "unknown info";
+                }));
+    }
+
+    @GetMapping(value = "/info")
+    public String info(@RequestParam(name = "name") String name) {
+        var startTime = System.currentTimeMillis();
+        metricsManager.incrementValue(REQUEST_COUNTER);
+        log.info("request. name:{}", name);
+        String additionalInfo = null;
+        try {
+            additionalInfo = getAdditionalInfoFunction.apply(new RequestForData(name, MDC.get(MDC_REQUEST_ID)));
+        } catch (Throwable ex) {
+            log.error("can't execute additional info, name:{}, error:{}", name, ex.getMessage());
+        }
+        var requestResult = String.format("ClientInfo name:%s, additional:%s", name, additionalInfo);
+
+        var duration = System.currentTimeMillis() - startTime;
+        metricsManager.putValue(Meter.REQUEST_DURATION, duration);
+        return requestResult;
+    }
+
+    private String doRequest(RequestForData requestForData) {
+        try {
+            MDC.put(MDC_REQUEST_ID, requestForData.requestId());
+            return getAdditionalInfo(requestForData.name());
+        } finally {
+            MDC.remove(MDC_REQUEST_ID);
+        }
+    }
+
+    private String getAdditionalInfo(String name) {
+        try {
+            var clientInfo = discoveryClient.getNextServerFromEureka("SERVICE-CLIENT-INFO", false);
+            log.info("clientInfo from Eureka:{}", clientInfo);
+            var additionalInfo = clientAdditionalInfoClient.additionalInfo(
+                    MDC.get(MDC_REQUEST_ID), new URI(clientInfo.getHomePageUrl()), name);
+            log.info("additionalInfo:{}", additionalInfo);
+            return additionalInfo.data();
+        } catch (Exception ex) {
+            log.error("can't get additional info, name:{}, error:{}", name, ex.getMessage());
+            return null;
+        }
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/filter/MdcFilter.java

@@ -0,0 +1,38 @@
+package ru.demo.filter;
+
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.ArrayList;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+public class MdcFilter extends OncePerRequestFilter {
+    public static final String HEADER_X_REQUEST_ID = "X-Request-Id";
+    public static final String MDC_REQUEST_ID = "requestId";
+    private final Logger log = LoggerFactory.getLogger(MdcFilter.class);
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
+            throws ServletException, IOException {
+        var xRequestId = request.getHeader(HEADER_X_REQUEST_ID);
+        log.debug("xRequestId:{}", xRequestId);
+        if (xRequestId != null) {
+            MDC.put(MDC_REQUEST_ID, xRequestId);
+        }
+        var headerIterator = request.getHeaderNames().asIterator();
+        var headers = new ArrayList<String>();
+        while (headerIterator.hasNext()) {
+            headers.add(headerIterator.next());
+        }
+        log.debug("request headers:{}", headers);
+        response.addHeader(HEADER_X_REQUEST_ID, xRequestId);
+        filterChain.doFilter(request, response);
+        MDC.remove(MDC_REQUEST_ID);
+        log.debug("response headers:{}", response.getHeaderNames());
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/metrics/Meter.java

@@ -0,0 +1,16 @@
+package ru.demo.metrics;
+
+public enum Meter {
+    REQUEST_COUNTER("request_counter"),
+    REQUEST_DURATION("request_duration");
+
+    private final String meterName;
+
+    Meter(String meterName) {
+        this.meterName = meterName;
+    }
+
+    public String getMeterName() {
+        return meterName;
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/metrics/MetricsManager.java

@@ -0,0 +1,11 @@
+package ru.demo.metrics;
+
+import java.util.function.Supplier;
+
+public interface MetricsManager {
+    void putValue(Meter meterName, long value);
+
+    void incrementValue(Meter meterName);
+
+    void registerGauge(Meter gaugeName, Supplier<Number> gaugeGetter);
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/metrics/MicrometerMetricsManager.java

@@ -0,0 +1,52 @@
+package ru.demo.metrics;
+
+import io.micrometer.core.instrument.Counter;
+import io.micrometer.core.instrument.Gauge;
+import io.micrometer.core.instrument.MeterRegistry;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.function.Supplier;
+
+public class MicrometerMetricsManager implements MetricsManager {
+    private final MeterRegistry meterRegistry;
+    private final Map<String, AtomicLong> gauges = new ConcurrentHashMap<>();
+    private final Map<String, Counter> counters = new ConcurrentHashMap<>();
+
+    public MicrometerMetricsManager(MeterRegistry meterRegistry) {
+        this.meterRegistry = meterRegistry;
+    }
+
+    @Override
+    public void putValue(Meter meterName, long value) {
+        var gaugeName = makeMeterName(meterName);
+        var gauge = gauges.computeIfAbsent(gaugeName, key -> {
+            var newGauge = new AtomicLong();
+            registerGauge(meterName, newGauge::get);
+            return newGauge;
+        });
+        gauge.set(value);
+    }
+
+    @Override
+    public void registerGauge(Meter gaugeName, Supplier<Number> gaugeGetter) {
+        var builder = Gauge.builder(gaugeName.getMeterName(), gaugeGetter);
+        builder.register(meterRegistry);
+    }
+
+    @Override
+    public void incrementValue(Meter meterName) {
+        var counterName = makeMeterName(meterName);
+        var counter = counters.computeIfAbsent(counterName, key -> makeCounter(meterName));
+        counter.increment();
+    }
+
+    private Counter makeCounter(Meter meterName) {
+        var builder = Counter.builder(meterName.getMeterName());
+        return builder.register(meterRegistry);
+    }
+
+    private String makeMeterName(Meter meterName) {
+        return String.format("%s--", meterName.getMeterName());
+    }
+}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/model/ClientData.java

@@ -0,0 +1,3 @@
+package ru.demo.model;
+
+public record ClientData(String data) {}

2025-09/spring-35-36-spring-cloud/service-client/src/main/java/ru/demo/model/RequestForData.java

@@ -0,0 +1,3 @@
+package ru.demo.model;
+
+public record RequestForData(String name, String requestId) {}

2025-09/spring-35-36-spring-cloud/service-client/src/main/resources/application.yml

@@ -0,0 +1,18 @@
+spring:
+  application:
+    name: service-client
+  cloud:
+    config:
+      fail-fast: true
+      retry:
+        initial-interval: 5000
+        max-attempts: 10
+        max-interval: 5000
+        multiplier: 1.2
+  config:
+    import: optional:configserver:http://localhost:8888
+  codec:
+    max-in-memory-size: 10MB
+
+
+

2025-09/spring-35-36-spring-cloud/service-client/src/main/resources/logback.xml

@@ -0,0 +1,26 @@
+<configuration scan="true" scanPeriod="10 seconds">
+    <jmxConfigurator />
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - [%X{requestId}] %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <appender name="kafka" class="ru.appender.kafka.LogAppender">
+        <bootstrapServers>localhost:9092</bootstrapServers>
+        <topicName>applLogs</topicName>
+        <encoder class="net.logstash.logback.encoder.LogstashEncoder">
+            <fieldNames>
+                <version>[ignore]</version>
+            </fieldNames>
+            <customFields>{"appname":"service-client"}</customFields>
+            <includeMdcKeyName>requestId</includeMdcKeyName>
+        </encoder>
+    </appender>
+
+    <root level="info">
+        <appender-ref ref="STDOUT" />
+        <appender-ref ref="kafka" />
+    </root>
+</configuration>

2025-09/spring-35-36-spring-cloud/service-order/build.gradle.kts

@@ -0,0 +1,39 @@
+plugins {
+    id("com.google.cloud.tools.jib")
+}
+
+dependencies {
+    implementation(project(":kafka-log-appender"))
+    implementation("net.logstash.logback:logstash-logback-encoder")
+
+    implementation ("org.springframework.boot:spring-boot-starter-web")
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("io.micrometer:micrometer-registry-prometheus")
+
+    implementation("org.springframework.cloud:spring-cloud-starter-config")
+    implementation("org.springframework.cloud:spring-cloud-starter-netflix-eureka-client")
+
+    implementation("io.micrometer:micrometer-tracing-bridge-otel") // bridges the Micrometer Observation API to OpenTelemetry.
+    implementation("io.opentelemetry:opentelemetry-exporter-zipkin") // reports traces to Zipkin.
+}
+
+jib {
+    container {
+        creationTime.set("USE_CURRENT_TIMESTAMP")
+    }
+    from {
+        image = "bellsoft/liberica-openjdk-alpine-musl:21.0.1"
+    }
+
+    to {
+        image = "localrun/service-order"
+        tags = setOf(project.version.toString())
+    }
+}
+
+tasks {
+    build {
+        dependsOn(spotlessApply)
+        dependsOn(jibBuildTar)
+    }
+}

2025-09/spring-35-36-spring-cloud/service-order/runServiceOrder.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+../gradlew :service-order:build
+
+docker load --input build/jib-image.tar
+
+docker stop service-order-1
+docker stop service-order-2
+
+docker run --rm -d --name service-order-1 \
+--memory=256m \
+--cpus 1 \
+--network="host" \
+-e JAVA_TOOL_OPTIONS="-XX:InitialRAMPercentage=80 -XX:MaxRAMPercentage=80" \
+-e SPRING_APPLICATION_INSTANCE_ID="i1" \
+-e SERVER_PORT=8091 \
+localrun/service-order:latest
+
+docker run --rm -d --name service-order-2 \
+--memory=256m \
+--cpus 1 \
+--network="host" \
+-e JAVA_TOOL_OPTIONS="-XX:InitialRAMPercentage=80 -XX:MaxRAMPercentage=80" \
+-e SPRING_APPLICATION_INSTANCE_ID="i2" \
+-e SERVER_PORT=8092 \
+localrun/service-order:latest
+

2025-09/spring-35-36-spring-cloud/service-order/src/main/java/ru/demo/Config.java

@@ -0,0 +1,15 @@
+package ru.demo;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import ru.demo.controller.InstanceId;
+
+@Configuration
+public class Config {
+
+    @Bean
+    InstanceId instanceId(@Value("${spring.application.instance_id}") String id) {
+        return new InstanceId(id);
+    }
+}

2025-09/spring-35-36-spring-cloud/service-order/src/main/java/ru/demo/ServiceOrder.java

@@ -0,0 +1,11 @@
+package ru.demo;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+
+@SpringBootApplication
+public class ServiceOrder {
+    public static void main(String[] args) {
+        new SpringApplicationBuilder().sources(ServiceOrder.class).run(args);
+    }
+}

2025-09/spring-35-36-spring-cloud/service-order/src/main/java/ru/demo/controller/InstanceId.java

@@ -0,0 +1,3 @@
+package ru.demo.controller;
+
+public record InstanceId(String name) {}

2025-09/spring-35-36-spring-cloud/service-order/src/main/java/ru/demo/controller/OrderController.java

@@ -0,0 +1,28 @@
+package ru.demo.controller;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class OrderController {
+    private static final Logger logger = LoggerFactory.getLogger(OrderController.class);
+    private final InstanceId instanceId;
+
+    public OrderController(InstanceId instanceId) {
+        this.instanceId = instanceId;
+    }
+
+    // curl -v http://localhost:8082/info?id="idClient"
+
+    // curl -v http://localhost:8091/info?id="idClient"
+    // curl -v http://localhost:8092/info?id="idClient"
+
+    @GetMapping(value = "/info")
+    public String info(@RequestParam(name = "id") String id) {
+        logger.info("instanceId:{}, request. id:{}", instanceId.name(), id);
+        return String.format("%s, Order id:%s", instanceId.name(), id);
+    }
+}

2025-09/spring-35-36-spring-cloud/service-order/src/main/resources/application.yml

@@ -0,0 +1,18 @@
+spring:
+  application:
+    name: service-order
+    instance_id: i0
+  cloud:
+    config:
+      fail-fast: true
+      retry:
+        initial-interval: 5000
+        max-attempts: 10
+        max-interval: 5000
+        multiplier: 1.2
+  config:
+    import: optional:configserver:http://localhost:8888
+  codec:
+    max-in-memory-size: 10MB
+
+

2025-09/spring-35-36-spring-cloud/service-order/src/main/resources/logback.xml

@@ -0,0 +1,26 @@
+<configuration scan="true" scanPeriod="10 seconds">
+    <jmxConfigurator />
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - [%X{requestId}] %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <appender name="kafka" class="ru.appender.kafka.LogAppender">
+        <bootstrapServers>localhost:9092</bootstrapServers>
+        <topicName>applLogs</topicName>
+        <encoder class="net.logstash.logback.encoder.LogstashEncoder">
+            <fieldNames>
+                <version>[ignore]</version>
+            </fieldNames>
+            <customFields>{"appname":"service-order"}</customFields>
+            <includeMdcKeyName>requestId</includeMdcKeyName>
+        </encoder>
+    </appender>
+
+    <root level="info">
+        <appender-ref ref="STDOUT" />
+        <appender-ref ref="kafka" />
+    </root>
+</configuration>

2025-09/spring-35-36-spring-cloud/settings.gradle.kts

@@ -0,0 +1,27 @@
+pluginManagement {
+    val jgitver: String by settings
+    val dependencyManagement: String by settings
+    val springframeworkBoot: String by settings
+    val sonarlint: String by settings
+    val spotless: String by settings
+    val jib: String by settings
+
+    plugins {
+        id("fr.brouillard.oss.gradle.jgitver") version jgitver
+        id("io.spring.dependency-management") version dependencyManagement
+        id("org.springframework.boot") version springframeworkBoot
+        id("name.remal.sonarlint") version sonarlint
+        id("com.diffplug.spotless") version spotless
+        id("com.google.cloud.tools.jib") version jib
+    }
+}
+rootProject.name = "spring-cloud"
+
+include("api-gateway")
+include("config-server")
+include("eureka-server")
+include("service-client")
+include("service-client-info")
+include("service-order")
+
+include("kafka-log-appender")