2025-01 spring-06-bean-scopes-and-lifecycle added

2025-01/spring-06-bean-scopes-and-lifecycle/.gitignore

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+.idea/
+*.iml
+
+target/

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/.gitignore

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+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+#other
+*.bat
+*/.idea
+*.iml
+*/target
+
+.idea
+*.iml
+target

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/README.md

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+#### Упражнение №2
+- Изучить классы ничего в них не меняя:
+    - CustomBeanFactoryPostProcessor
+    - CustomBeanPostProcessor
+    - CustomLifeCycleBean 
+- Запуститить приложение
+- Изучить распечатанный жизненный цикл
+
+
+#### Упражнение №3
+- В application.yml выставить spring.shell.interactive.enabled в true
+- Запуститить приложение командой "cfn" или "call-favorite-number"
+- Запомнить результат
+- В CustomBeanFactoryPostProcessor раскомментировать блок кода
+- Запуститить приложение командой "cfn" или "call-favorite-number"
+- Что изменилось?
+- В CustomBeanPostProcessor раскомментировать строку
+- Запуститить приложение командой "cfn" или "call-favorite-number"
+- Что изменилось теперь? Круто, да?

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/pom.xml

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+<?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>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>3.4.2</version>
+		<relativePath/>
+	</parent>
+	<groupId>ru.otus.example</groupId>
+	<artifactId>beans-lifecycle-exercise</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+
+	<properties>
+		<java.version>17</java.version>
+		<maven.compiler.source>17</maven.compiler.source>
+		<maven.compiler.target>17</maven.compiler.target>
+		<snakeyaml.version>2.0</snakeyaml.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.yaml</groupId>
+			<artifactId>snakeyaml</artifactId>
+			<version>${snakeyaml.version}</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+</project>

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/java/ru/otus/example/beanslifecycledemo/BeansLifecycleDemoApplication.java

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+package ru.otus.example.beanslifecycledemo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+import ru.otus.example.beanslifecycledemo.domain.Phone;
+
+@SpringBootApplication
+public class BeansLifecycleDemoApplication {
+
+	public static void main(String[] args) {
+		ApplicationContext ctx = SpringApplication.run(BeansLifecycleDemoApplication.class, args);
+		try {
+			Phone phone = ctx.getBean(Phone.class);
+			phone.callFavoriteNumber();
+		}catch (Exception e) {
+		}
+	}
+
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/java/ru/otus/example/beanslifecycledemo/domain/FriendPhoneNumber.java

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+package ru.otus.example.beanslifecycledemo.domain;
+
+public class FriendPhoneNumber extends PhoneNumber {
+    @Override
+    public String getOwnerName() {
+        return "Друг";
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/java/ru/otus/example/beanslifecycledemo/domain/GirlfiendPhoneNumber.java

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+package ru.otus.example.beanslifecycledemo.domain;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class GirlfiendPhoneNumber extends PhoneNumber {
+    @Override
+    public String getOwnerName() {
+        return "Подруга";
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/java/ru/otus/example/beanslifecycledemo/domain/Phone.java

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+package ru.otus.example.beanslifecycledemo.domain;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.stereotype.Component;
+
+@Component
+@ConditionalOnProperty(name = "lifecycle.print.enabled", havingValue = "false")
+@RequiredArgsConstructor
+public class Phone {
+    private String greeting = "Погнали к родителям";
+
+    private final PhoneNumber favoriteNumber;
+
+    public void callFavoriteNumber() {
+        System.out.println(favoriteNumber.getOwnerName() + " " + greeting);
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/java/ru/otus/example/beanslifecycledemo/domain/PhoneNumber.java

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+package ru.otus.example.beanslifecycledemo.domain;
+
+public abstract class PhoneNumber {
+    public String getOwnerName() {
+        return "Спорт-лото";
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/java/ru/otus/example/beanslifecycledemo/lifecycle/CustomBeanDefinitionRegistrar.java

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+package ru.otus.example.beanslifecycledemo.lifecycle;
+
+import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.beans.factory.support.BeanNameGenerator;
+import org.springframework.beans.factory.support.GenericBeanDefinition;
+import org.springframework.context.EnvironmentAware;
+import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
+import org.springframework.core.env.Environment;
+import org.springframework.core.type.AnnotationMetadata;
+
+import java.util.Optional;
+
+public class CustomBeanDefinitionRegistrar implements ImportBeanDefinitionRegistrar, EnvironmentAware {
+    private Environment environment;
+
+    @Override
+    public void setEnvironment(Environment environment) {
+        this.environment = environment;
+    }
+
+    @Override
+    public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata,
+                                        BeanDefinitionRegistry registry,
+                                        BeanNameGenerator importBeanNameGenerator) {
+        registerBeanDefinitions(importingClassMetadata, registry);
+    }
+
+    @Override
+    public void registerBeanDefinitions(AnnotationMetadata metadata,
+                                        BeanDefinitionRegistry registry) {
+
+        registerBeanFactoryPostProcessor(registry);
+        registerBeanPostProcessor(registry);
+
+        if (Optional.ofNullable(environment.getProperty("lifecycle.print.enabled", Boolean.class)).orElse(false)) {
+            System.out.println("Шаг #0: ImportBeanDefinitionRegistrar.registerBeanDefinitions\n");
+            registerCustomLifeCycleBean(registry);
+        }
+
+    }
+
+    private void registerCustomLifeCycleBean(BeanDefinitionRegistry registry) {
+        GenericBeanDefinition gbd = new GenericBeanDefinition();
+        gbd.setBeanClass(CustomLifeCycleBean.class);
+        gbd.setInitMethodName("customInitMethod");
+        gbd.setDestroyMethodName("customDestroyMethod");
+        registry.registerBeanDefinition("customLifeCycleBean", gbd);
+    }
+
+    private void registerBeanFactoryPostProcessor(BeanDefinitionRegistry registry) {
+        GenericBeanDefinition gbd = new GenericBeanDefinition();
+        gbd.setBeanClass(CustomBeanFactoryPostProcessor.class);
+        registry.registerBeanDefinition("customBeanFactoryPostProcessor", gbd);
+    }
+
+    private void registerBeanPostProcessor(BeanDefinitionRegistry registry) {
+        GenericBeanDefinition gbd = new GenericBeanDefinition();
+        gbd.setBeanClass(CustomBeanPostProcessor.class);
+        registry.registerBeanDefinition("customBeanPostProcessor", gbd);
+    }
+
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/java/ru/otus/example/beanslifecycledemo/lifecycle/CustomBeanFactoryPostProcessor.java

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+package ru.otus.example.beanslifecycledemo.lifecycle;
+
+import org.springframework.beans.BeanMetadataAttribute;
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
+import org.springframework.context.annotation.ScannedGenericBeanDefinition;
+import ru.otus.example.beanslifecycledemo.domain.FriendPhoneNumber;
+import ru.otus.example.beanslifecycledemo.domain.GirlfiendPhoneNumber;
+
+public class CustomBeanFactoryPostProcessor implements BeanFactoryPostProcessor {
+
+    private static final String CLASS_NAME_ATTR = "className";
+
+    @Override
+    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
+
+        if (beanFactory.containsBean("customLifeCycleBean")) {
+            System.out.println("Шаг #1: BeanFactoryPostProcessor.postProcessBeanFactory\n");
+        }
+
+/*        for (String beanName : beanFactory.getBeanDefinitionNames()) {
+            var d = beanFactory.getBeanDefinition(beanName);
+            if (d instanceof ScannedGenericBeanDefinition scannedBeanDefinition) {
+
+                if (!GirlfiendPhoneNumber.class.getName().equalsIgnoreCase(d.getBeanClassName())) {
+                    continue;
+                }
+                d.setBeanClassName(FriendPhoneNumber.class.getName());
+                var classNameAttr = new BeanMetadataAttribute(CLASS_NAME_ATTR, FriendPhoneNumber.class.getName());
+                scannedBeanDefinition.addMetadataAttribute(classNameAttr);
+            }
+        }*/
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/java/ru/otus/example/beanslifecycledemo/lifecycle/CustomBeanPostProcessor.java

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+package ru.otus.example.beanslifecycledemo.lifecycle;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.InvalidPropertyException;
+import org.springframework.beans.factory.config.BeanPostProcessor;
+import ru.otus.example.beanslifecycledemo.domain.Phone;
+
+import java.lang.reflect.Field;
+
+public class CustomBeanPostProcessor implements BeanPostProcessor {
+
+    public static final String GREETING_PROPERTY = "greeting";
+
+    @Override
+    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
+        if (bean.getClass().equals(CustomLifeCycleBean.class)) {
+            System.out.println("Шаг #5: BeanPostProcessor.postProcessBeforeInitialization\n");
+        }
+        return bean;
+    }
+
+    @Override
+    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
+        if (bean.getClass().equals(CustomLifeCycleBean.class)) {
+            System.out.println("Шаг #9: BeanPostProcessor.postProcessAfterInitialization\n");
+        }
+
+/*
+        if (bean.getClass().isAssignableFrom(Phone.class)) {
+            updateGreeting(bean);
+        }
+*/
+        return bean;
+    }
+
+    private void updateGreeting(Object bean) {
+        Class<?> aClass = Phone.class;
+        try {
+            Field greetingField = aClass.getDeclaredField(GREETING_PROPERTY);
+
+            greetingField.setAccessible(true);
+            greetingField.set(bean, "Ай-да в гараж. Стихи читать!");
+        } catch (Exception e) {
+            throw new InvalidPropertyException(Phone.class, GREETING_PROPERTY,
+                    "Bean class does not have expected property", e);
+        }
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/java/ru/otus/example/beanslifecycledemo/lifecycle/CustomLifeCycleBean.java

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+package ru.otus.example.beanslifecycledemo.lifecycle;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.*;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+/*
+import javax.annotation.PostConstruct;
+import javax.annotation.PreDestroy;
+*/
+
+import jakarta.annotation.PostConstruct;
+import jakarta.annotation.PreDestroy;
+
+public class CustomLifeCycleBean implements InitializingBean, DisposableBean, BeanNameAware,
+        BeanFactoryAware, ApplicationContextAware {
+
+    @Override
+    public void setBeanName(String s) {
+        System.out.println("Шаг #2: BeanNameAware\n");
+    }
+
+    @Override
+    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
+        System.out.println("Шаг #3: BeanFactoryAware\n");
+    }
+
+    @Override
+    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
+        System.out.println("Шаг #4: ApplicationContextAware\n");
+    }
+
+    @PostConstruct
+    public void postConstruct() {
+        System.out.println("Шаг #6: @PostConstruct\n");
+    }
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        System.out.println("Шаг #7: InitializingBean.afterPropertiesSet\n");
+    }
+
+    public void customInitMethod() {
+        System.out.println("Шаг #8: CustomLifeCycleBean.customInitMethod\n");
+    }
+
+    @PreDestroy
+    public void preDestroy() {
+        System.out.println("Шаг #10: @PreDestroy\n");
+    }
+
+    @Override
+    public void destroy() throws Exception {
+        System.out.println("Шаг #11: DisposableBean.destroy\n");
+    }
+
+    public void customDestroyMethod() {
+        System.out.println("Шаг #12: CustomLifeCycleBean.customDestroyMethod\n");
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/java/ru/otus/example/beanslifecycledemo/lifecycle/LifeCycleConfig.java

@@ -0,0 +1,30 @@
+package ru.otus.example.beanslifecycledemo.lifecycle;
+
+import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
+import org.springframework.beans.factory.config.BeanPostProcessor;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+@Import(CustomBeanDefinitionRegistrar.class)
+@Configuration
+public class LifeCycleConfig {
+/*
+    @Bean
+    public BeanFactoryPostProcessor customBeanFactoryPostProcessor() {
+        return new CustomBeanFactoryPostProcessor();
+    }
+
+    @Bean
+    public BeanPostProcessor customBeanPostProcessor() {
+        return new CustomBeanPostProcessor();
+    }
+
+    @ConditionalOnProperty(name = "lifecycle.print.enabled", havingValue = "true")
+    @Bean(initMethod = "customInitMethod", destroyMethod = "customDestroyMethod")
+    public CustomLifeCycleBean customLifeCycleBean() {
+        return new CustomLifeCycleBean();
+    }
+*/
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-lifecycle-exercise/src/main/resources/application.yml

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+logging:
+  level:
+    root: ERROR
+
+lifecycle:
+  print:
+    enabled: true

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/.gitignore

@@ -0,0 +1,32 @@
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+#other
+*.bat
+*/.idea
+*.iml
+*/target
+
+.idea
+*.iml
+target

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/README.md

@@ -0,0 +1,9 @@
+#### Упражнение №1
+- Расставить скоупы над сервисами так, чтобы приложение запустилось и заработало, как указано на странице http://localhost:8080
+- Подсказки в названии сервисов
+- Не забываем про proxyMode для некоторых скоупов
+
+```
+Задать скоуп можно с помощью аннотации @Scope
+Возможные значения: singleton, prototype, session, request
+```

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/pom.xml

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+<?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>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>3.4.2</version>
+		<relativePath/>
+	</parent>
+	
+	<groupId>ru.otus.example</groupId>
+	<artifactId>beans-scopes-exercise</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+
+	<properties>
+		<java.version>17</java.version>
+		<maven.compiler.source>17</maven.compiler.source>
+		<maven.compiler.target>17</maven.compiler.target>
+		<snakeyaml.version>2.0</snakeyaml.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-thymeleaf</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.yaml</groupId>
+			<artifactId>snakeyaml</artifactId>
+			<version>${snakeyaml.version}</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+</project>

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/src/main/java/ru/otus/example/beansscopesdemo/BeansScopesDemoApplication.java

@@ -0,0 +1,15 @@
+package ru.otus.example.beansscopesdemo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class BeansScopesDemoApplication {
+
+	public static void main(String[] args) {
+		var ctx = SpringApplication.run(BeansScopesDemoApplication.class, args);
+		var serverPort = ctx.getEnvironment().getProperty("local.server.port");
+		System.out.printf("Чтобы смотреть результат переходи сюда: http://localhost:%s", serverPort);
+	}
+
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/src/main/java/ru/otus/example/beansscopesdemo/controllers/GreetingController.java

@@ -0,0 +1,41 @@
+package ru.otus.example.beansscopesdemo.controllers;
+
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import ru.otus.example.beansscopesdemo.services.GreetingService;
+
+@Controller
+public class GreetingController {
+    private final GreetingService singletonGreetingService;
+    private final GreetingService prototypeGreetingService1;
+    private final GreetingService prototypeGreetingService2;
+    private final GreetingService sessionGreetingService;
+    private final GreetingService requestGreetingService;
+
+    public GreetingController(GreetingService singletonGreetingService,
+                              @Qualifier("prototypeGreetingService")
+                                      GreetingService prototypeGreetingService1,
+                              @Qualifier("prototypeGreetingService")
+                                      GreetingService prototypeGreetingService2,
+                              GreetingService sessionGreetingService,
+                              GreetingService requestGreetingService
+    ) {
+        this.singletonGreetingService = singletonGreetingService;
+        this.prototypeGreetingService1 = prototypeGreetingService1;
+        this.prototypeGreetingService2 = prototypeGreetingService2;
+        this.sessionGreetingService = sessionGreetingService;
+        this.requestGreetingService = requestGreetingService;
+    }
+
+    @GetMapping("/")
+    public String greetingPage(Model model) {
+        model.addAttribute("singletonGreeting", singletonGreetingService.greeting());
+        model.addAttribute("sessionGreeting", sessionGreetingService.greeting());
+        model.addAttribute("requestGreeting", requestGreetingService.greeting());
+        model.addAttribute("prototype1Greeting", prototypeGreetingService1.greeting());
+        model.addAttribute("prototype2Greeting", prototypeGreetingService2.greeting());
+        return "index";
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/src/main/java/ru/otus/example/beansscopesdemo/services/AbstractGreetingServiceImpl.java

@@ -0,0 +1,23 @@
+package ru.otus.example.beansscopesdemo.services;
+
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+public abstract class AbstractGreetingServiceImpl implements GreetingService {
+
+    private final AtomicInteger counter;
+
+    public AbstractGreetingServiceImpl() {
+        this.counter = new AtomicInteger(0);
+    }
+
+    @Override
+    public String greeting() {
+        return currentGreeting();
+    }
+
+    private String currentGreeting() {
+        return String.format("Привет! Это наша встреча №%d. Меня зовут: %s",
+                counter.incrementAndGet(), Integer.toHexString(hashCode()));
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/src/main/java/ru/otus/example/beansscopesdemo/services/GreetingService.java

@@ -0,0 +1,5 @@
+package ru.otus.example.beansscopesdemo.services;
+
+public interface GreetingService {
+    String greeting();
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/src/main/java/ru/otus/example/beansscopesdemo/services/PrototypeGreetingServiceImpl.java

@@ -0,0 +1,7 @@
+package ru.otus.example.beansscopesdemo.services;
+
+import org.springframework.stereotype.Service;
+
+@Service("prototypeGreetingService")
+public class PrototypeGreetingServiceImpl extends AbstractGreetingServiceImpl {
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/src/main/java/ru/otus/example/beansscopesdemo/services/RequestGreetingServiceImpl.java

@@ -0,0 +1,7 @@
+package ru.otus.example.beansscopesdemo.services;
+
+import org.springframework.stereotype.Service;
+
+@Service("requestGreetingService")
+public class RequestGreetingServiceImpl extends AbstractGreetingServiceImpl {
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/src/main/java/ru/otus/example/beansscopesdemo/services/SessionGreetingServiceImpl.java

@@ -0,0 +1,7 @@
+package ru.otus.example.beansscopesdemo.services;
+
+import org.springframework.stereotype.Service;
+
+@Service("sessionGreetingService")
+public class SessionGreetingServiceImpl extends AbstractGreetingServiceImpl {
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/src/main/java/ru/otus/example/beansscopesdemo/services/SingletonGreetingServiceImpl.java

@@ -0,0 +1,7 @@
+package ru.otus.example.beansscopesdemo.services;
+
+import org.springframework.stereotype.Service;
+
+@Service("singletonGreetingService")
+public class SingletonGreetingServiceImpl extends AbstractGreetingServiceImpl {
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/src/main/resources/application.yml

@@ -0,0 +1,5 @@
+server:
+  port: 8081
+logging:
+  level:
+    root: ERROR

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-exercise/src/main/resources/templates/index.html

@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<html lang="ru" xmlns:th="http://www.thymeleaf.org">
+<head>
+    <meta charset="UTF-8">
+    <title>Advanced configuration demo</title>
+    <style>
+        body {
+            font-size: 16pt;
+        }
+
+        h3 {
+            color: CornflowerBlue;
+        }
+
+        li {
+            color: DarkGray;
+        }
+
+        p {
+            color: OrangeRed;
+            font-weight: bold;
+        }
+    </style>
+</head>
+<body>
+<p>
+<h3>Демонстрация @Scope</h3>
+<ul>
+    <li>Singleton должен постоянно накручивать счетчик встреч и не менять имя</li>
+    <li>Prototype1 должен вести себя так же, как и Singleton, но иметь имя отличное от Prototype2</li>
+    <li>Prototype2 должен вести себя так же, как и Singleton, но иметь имя отличное от Prototype1</li>
+    <li>Session должен вести себя как Singleton, но только до перезапуска браузера. После, счетчик встреч должен пойти заново</li>
+    <li>Request должен всегда показывать первую встречу и разное имя</li>
+</ul>
+</p>
+
+<hr/>
+
+<p th:text = "'Singleton сказал: ' + ${singletonGreeting}"></p>
+<p th:text = "'Prototype1 сказал: ' + ${prototype1Greeting}"></p>
+<p th:text = "'Prototype2 сказал: ' + ${prototype2Greeting}"></p>
+<p th:text = "'Session сказал: ' + ${sessionGreeting}"></p>
+<p th:text = "'Request сказал: ' + ${requestGreeting}"></p>
+</body>
+</html>

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/.gitignore

@@ -0,0 +1,32 @@
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+#other
+*.bat
+*/.idea
+*.iml
+*/target
+
+.idea
+*.iml
+target

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/README.md

@@ -0,0 +1,15 @@
+#### Решение к упражнению №1
+
+@Scope("singleton")  
+SingletonGreetingServiceImpl
+
+@Scope("prototype")  
+PrototypeGreetingServiceImpl
+
+@Scope(value = "request", proxyMode = ScopedProxyMode.INTERFACES)
+RequestGreetingServiceImpl
+
+@Scope(value = "session", proxyMode = ScopedProxyMode.INTERFACES)
+SessionGreetingServiceImpl
+
+

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/pom.xml

@@ -0,0 +1,56 @@
+<?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>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>3.4.2</version>
+		<relativePath/>
+	</parent>
+	
+	<groupId>ru.otus.example</groupId>
+	<artifactId>beans-scopes-solution</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+
+	<properties>
+		<java.version>17</java.version>
+		<maven.compiler.source>17</maven.compiler.source>
+		<maven.compiler.target>17</maven.compiler.target>
+		<snakeyaml.version>2.0</snakeyaml.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-thymeleaf</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.yaml</groupId>
+			<artifactId>snakeyaml</artifactId>
+			<version>${snakeyaml.version}</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+</project>

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/src/main/java/ru/otus/example/beansscopesdemo/BeansScopesDemoApplication.java

@@ -0,0 +1,15 @@
+package ru.otus.example.beansscopesdemo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class BeansScopesDemoApplication {
+
+	public static void main(String[] args) {
+		var ctx = SpringApplication.run(BeansScopesDemoApplication.class, args);
+		var serverPort = ctx.getEnvironment().getProperty("local.server.port");
+		System.out.printf("Чтобы смотреть результат переходи сюда: http://localhost:%s", serverPort);
+	}
+
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/src/main/java/ru/otus/example/beansscopesdemo/controllers/GreetingController.java

@@ -0,0 +1,41 @@
+package ru.otus.example.beansscopesdemo.controllers;
+
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import ru.otus.example.beansscopesdemo.services.GreetingService;
+
+@Controller
+public class GreetingController {
+    private final GreetingService singletonGreetingService;
+    private final GreetingService prototypeGreetingService1;
+    private final GreetingService prototypeGreetingService2;
+    private final GreetingService sessionGreetingService;
+    private final GreetingService requestGreetingService;
+
+    public GreetingController(GreetingService singletonGreetingService,
+                              @Qualifier("prototypeGreetingService")
+                                      GreetingService prototypeGreetingService1,
+                              @Qualifier("prototypeGreetingService")
+                                      GreetingService prototypeGreetingService2,
+                              GreetingService sessionGreetingService,
+                              GreetingService requestGreetingService
+    ) {
+        this.singletonGreetingService = singletonGreetingService;
+        this.prototypeGreetingService1 = prototypeGreetingService1;
+        this.prototypeGreetingService2 = prototypeGreetingService2;
+        this.sessionGreetingService = sessionGreetingService;
+        this.requestGreetingService = requestGreetingService;
+    }
+
+    @GetMapping("/")
+    public String greetingPage(Model model) {
+        model.addAttribute("singletonGreeting", singletonGreetingService.greeting());
+        model.addAttribute("sessionGreeting", sessionGreetingService.greeting());
+        model.addAttribute("requestGreeting", requestGreetingService.greeting());
+        model.addAttribute("prototype1Greeting", prototypeGreetingService1.greeting());
+        model.addAttribute("prototype2Greeting", prototypeGreetingService2.greeting());
+        return "index";
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/src/main/java/ru/otus/example/beansscopesdemo/services/AbstractGreetingServiceImpl.java

@@ -0,0 +1,23 @@
+package ru.otus.example.beansscopesdemo.services;
+
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+public abstract class AbstractGreetingServiceImpl implements GreetingService {
+
+    private final AtomicInteger counter;
+
+    public AbstractGreetingServiceImpl() {
+        this.counter = new AtomicInteger(0);
+    }
+
+    @Override
+    public String greeting() {
+        return currentGreeting();
+    }
+
+    private String currentGreeting() {
+        return String.format("Привет! Это наша встреча №%d. Меня зовут: %s",
+                counter.incrementAndGet(), Integer.toHexString(hashCode()));
+    }
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/src/main/java/ru/otus/example/beansscopesdemo/services/GreetingService.java

@@ -0,0 +1,5 @@
+package ru.otus.example.beansscopesdemo.services;
+
+public interface GreetingService {
+    String greeting();
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/src/main/java/ru/otus/example/beansscopesdemo/services/PrototypeGreetingServiceImpl.java

@@ -0,0 +1,10 @@
+package ru.otus.example.beansscopesdemo.services;
+
+import org.springframework.context.annotation.Scope;
+import org.springframework.context.annotation.ScopedProxyMode;
+import org.springframework.stereotype.Service;
+
+@Scope(scopeName = "prototype")
+@Service("prototypeGreetingService")
+public class PrototypeGreetingServiceImpl extends AbstractGreetingServiceImpl {
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/src/main/java/ru/otus/example/beansscopesdemo/services/RequestGreetingServiceImpl.java

@@ -0,0 +1,11 @@
+package ru.otus.example.beansscopesdemo.services;
+
+import org.springframework.context.annotation.Scope;
+import org.springframework.context.annotation.ScopedProxyMode;
+import org.springframework.stereotype.Service;
+import org.springframework.web.context.WebApplicationContext;
+
+@Scope(value = "request", proxyMode = ScopedProxyMode.INTERFACES)
+@Service("requestGreetingService")
+public class RequestGreetingServiceImpl extends AbstractGreetingServiceImpl {
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/src/main/java/ru/otus/example/beansscopesdemo/services/SessionGreetingServiceImpl.java

@@ -0,0 +1,11 @@
+package ru.otus.example.beansscopesdemo.services;
+
+import org.springframework.context.annotation.Scope;
+import org.springframework.context.annotation.ScopedProxyMode;
+import org.springframework.stereotype.Service;
+import org.springframework.web.context.WebApplicationContext;
+
+@Scope(value = "session", proxyMode = ScopedProxyMode.INTERFACES)
+@Service("sessionGreetingService")
+public class SessionGreetingServiceImpl extends AbstractGreetingServiceImpl {
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/src/main/java/ru/otus/example/beansscopesdemo/services/SingletonGreetingServiceImpl.java

@@ -0,0 +1,9 @@
+package ru.otus.example.beansscopesdemo.services;
+
+import org.springframework.context.annotation.Scope;
+import org.springframework.stereotype.Service;
+
+@Scope("singleton")
+@Service("singletonGreetingService")
+public class SingletonGreetingServiceImpl extends AbstractGreetingServiceImpl {
+}

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/src/main/resources/application.yml

@@ -0,0 +1,5 @@
+server:
+  port: 8081
+logging:
+  level:
+    root: ERROR

2025-01/spring-06-bean-scopes-and-lifecycle/beans-scopes-solution/src/main/resources/templates/index.html

@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<html lang="ru" xmlns:th="http://www.thymeleaf.org">
+<head>
+    <meta charset="UTF-8">
+    <title>Advanced configuration demo</title>
+    <style>
+        body {
+            font-size: 16pt;
+        }
+
+        h3 {
+            color: CornflowerBlue;
+        }
+
+        li {
+            color: DarkGray;
+        }
+
+        p {
+            color: OrangeRed;
+            font-weight: bold;
+        }
+    </style>
+</head>
+<body>
+    <p>
+        <h3>Демонстрация @Scope</h3>
+        <ul>
+            <li>Singleton должен постоянно накручивать счетчик встреч и не менять имя</li>
+            <li>Prototype1 должен вести себя так же, как и Singleton, но иметь имя отличное от Prototype2</li>
+            <li>Prototype2 должен вести себя так же, как и Singleton, но иметь имя отличное от Prototype1</li>
+            <li>Session должен вести себя как Singleton, но только до перезапуска браузера. После, счетчик встреч должен пойти заново</li>
+            <li>Request должен всегда показывать первую встречу и разное имя</li>
+        </ul>
+    </p>
+
+    <hr/>
+
+    <p th:text = "'Singleton сказал: ' + ${singletonGreeting}"></p>
+    <p th:text = "'Prototype1 сказал: ' + ${prototype1Greeting}"></p>
+    <p th:text = "'Prototype2 сказал: ' + ${prototype2Greeting}"></p>
+    <p th:text = "'Session сказал: ' + ${sessionGreeting}"></p>
+    <p th:text = "'Request сказал: ' + ${requestGreeting}"></p>
+</body>
+</html>

2025-01/spring-06-bean-scopes-and-lifecycle/pom.xml

@@ -0,0 +1,18 @@
+<?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>advanced-config-class-work</artifactId>
+    <version>1.0</version>
+
+    <packaging>pom</packaging>
+
+    <modules>
+		<module>beans-scopes-exercise</module>
+		<module>beans-scopes-solution</module>
+		<module>beans-lifecycle-exercise</module>
+    </modules>
+</project>