spring core : spring bean life cycle

spring-core/basic/src/test/java/com/example/basic/lifecycle/BeanLifeCycleTest.java

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+package com.example.basic.lifecycle;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+class BeanLifeCycleTest {
+
+    @Test
+    public void lifeCycleTest() {
+        ConfigurableApplicationContext ac = new AnnotationConfigApplicationContext(LifeCycleConfig.class);
+        NetworkClientInterface bean = ac.getBean(NetworkClientInterface.class);
+        NetworkClientMethod bean1 = ac.getBean(NetworkClientMethod.class);
+        NetworkClientAnnotation bean2 = ac.getBean(NetworkClientAnnotation.class);
+        ac.close();
+    }
+
+    @Configuration
+    static class LifeCycleConfig {
+        @Bean
+        public NetworkClientInterface networkClientInterface() {
+            NetworkClientInterface networkClient = new NetworkClientInterface();
+            networkClient.setUrl("http://hello-spring.dev");
+            return networkClient;
+        }
+
+        @Bean(initMethod = "init", destroyMethod = "close")
+        public NetworkClientMethod networkClientMethod() {
+            NetworkClientMethod networkClient = new NetworkClientMethod();
+            networkClient.setUrl("http://hello-spring.dev");
+            return networkClient;
+        }
+
+        @Bean
+        public NetworkClientAnnotation networkClientAnnotation() {
+            NetworkClientAnnotation networkClient = new NetworkClientAnnotation();
+            networkClient.setUrl("http://hello-spring.dev");
+            return networkClient;
+        }
+    }
+}

spring-core/basic/src/test/java/com/example/basic/lifecycle/NetworkClientAnnotation.java

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+package com.example.basic.lifecycle;
+
+import javax.annotation.PostConstruct;
+import javax.annotation.PreDestroy;
+
+public class NetworkClientAnnotation {
+
+    private String url;
+
+    public NetworkClientAnnotation() {
+        System.out.println("생성자 호출, url = " + url);
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    // 서비스 시작시 호출
+    public void connect() {
+        System.out.println("connect = " + url);
+    }
+
+    public void call(String message) {
+        System.out.println("call: " + url + " message = " + message);
+    }
+
+    // 서비스 종료시 호출
+    public void disconnect() {
+        System.out.println("close: " +  url);
+    }
+
+    @PostConstruct
+    public void init() throws Exception {
+        System.out.println("NetworkClientAnnotation.init");
+        connect();
+        call("초기화 연결 메시지");
+    }
+
+    @PreDestroy
+    public void close() throws Exception {
+        System.out.println("NetworkClientAnnotation.close");
+        disconnect();
+    }
+}

spring-core/basic/src/test/java/com/example/basic/lifecycle/NetworkClientInterface.java

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+package com.example.basic.lifecycle;
+
+import org.springframework.beans.factory.DisposableBean;
+import org.springframework.beans.factory.InitializingBean;
+
+public class NetworkClientInterface implements InitializingBean, DisposableBean {
+
+    private String url;
+
+    public NetworkClientInterface() {
+        System.out.println("생성자 호출, url = " + url);
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    // 서비스 시작시 호출
+    public void connect() {
+        System.out.println("connect = " + url);
+    }
+
+    public void call(String message) {
+        System.out.println("call: " + url + " message = " + message);
+    }
+
+    // 서비스 종료시 호출
+    public void disconnect() {
+        System.out.println("close: " +  url);
+    }
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        System.out.println("NetworkClientInterface.afterPropertiesSet");
+        connect();
+        call("초기화 연결 메시지");
+    }
+
+    @Override
+    public void destroy() throws Exception {
+        System.out.println("NetworkClientInterface.destroy");
+        disconnect();
+    }
+}

spring-core/basic/src/test/java/com/example/basic/lifecycle/NetworkClientMethod.java

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+package com.example.basic.lifecycle;
+
+public class NetworkClientMethod {
+
+    private String url;
+
+    public NetworkClientMethod() {
+        System.out.println("생성자 호출, url = " + url);
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    // 서비스 시작시 호출
+    public void connect() {
+        System.out.println("connect = " + url);
+    }
+
+    public void call(String message) {
+        System.out.println("call: " + url + " message = " + message);
+    }
+
+    // 서비스 종료시 호출
+    public void disconnect() {
+        System.out.println("close: " +  url);
+    }
+
+    public void init() throws Exception {
+        System.out.println("NetworkClientMethod.init");
+        connect();
+        call("초기화 연결 메시지");
+    }
+
+    public void close() throws Exception {
+        System.out.println("NetworkClientMethod.close");
+        disconnect();
+    }
+}