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Commitf9b5ffb

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Spring Bean post processor
1 parentcb03c35 commitf9b5ffb

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6 files changed

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6 files changed

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packagecommon;
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importlombok.Getter;
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importlombok.NoArgsConstructor;
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importlombok.Setter;
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@NoArgsConstructor
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publicclassGospel1 {
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//public Gospel1() {
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//}
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//public String getReflection() {
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//return Reflection;
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//}
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//
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//public void setReflection(String reflection) {
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//Reflection = reflection;
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//}
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@Setter@Getter
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privateStringReflection;
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}
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packagecommon;
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importlombok.Getter;
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importlombok.NoArgsConstructor;
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importlombok.Setter;
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@NoArgsConstructor
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publicclassHelloChina {
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// public HelloChina() {
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// }
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@Setter@Getter//these Lombok annotations eventually work in my own Eclipse and project now, I can safely comment out/remove those boilerplate code! Cool!
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privateStringmessage;
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// public void getMessage() {
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// System.out.println(message);
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// }
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// public void setMessage(String message) {
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// this.message = message;
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// }
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// this init() method is required b/c I'm using HelloWorld as this
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// HelloChina's parent bean
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publicvoidinit() {
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System.out.println("Bean HelloChina is going through init.");
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}
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// this destroy() method is required b/c I'm using HelloWorld as this
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// HelloChina's parent bean
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publicvoiddestroy() {
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System.out.println("Bean HelloChina will destroy now.");
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}
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}
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packagecommon;
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importlombok.Setter;
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publicclassHelloWorld {
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@Setter
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privateStringmessage;
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// public void setMessage(String message) {
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// this.message = message;
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// }
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publicvoidgetMessage() {
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System.out.println("Your Message : " +message);
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}
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publicvoidinit() {
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System.out.println("Bean HelloWorld is going through init.");
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}
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publicvoiddestroy() {
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System.out.println("Bean HelloWorld will destroy now.");
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}
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}
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packagespring_bean_post_processor;
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/**This MainApp is working fine.*/
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importorg.springframework.context.support.AbstractApplicationContext;
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importorg.springframework.context.support.ClassPathXmlApplicationContext;
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publicclassMainAppDemoBeanPostProcessor {
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publicstaticvoidmain(String[]args) {
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AbstractApplicationContextcontext =newClassPathXmlApplicationContext(
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"spring_bean_post_processor/beansForDemoBeanPostProcessor.xml");
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common.HelloWorldobj = (common.HelloWorld)context.getBean("helloWorld");
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obj.getMessage();
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common.HelloChinaobj2 = (common.HelloChina)context.getBean("helloChina");
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obj2.setMessage("China is saying hello to the rest of the world!");
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obj2.getMessage();
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context.registerShutdownHook();
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System.out.println("The program ended! Cool!");
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}
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}
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<?xml version="1.0" encoding="UTF-8"?>
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<beansxmlns="http://www.springframework.org/schema/beans"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://www.springframework.org/schema/beans
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http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
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<!-- I have another class called "initHelloWorld.java" which has init and
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destroy methods, so that I could have these properties set for this helloWolrd
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bean, but since the child bean "helloChina" doesn't have this class and init/destroy
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methods, Spring won't work if I want to init helloChina bean.-->
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<beanid="helloWorld"class="common.HelloWorld"
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init-method="init"destroy-method="destroy"lazy-init="true">
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<propertyname="message"
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value="Hello World from Steve Sun's very first own Spring project!" />
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</bean>
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<beanid="helloChina"class="common.HelloChina"
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parent="helloWorld"lazy-init="true">
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<propertyname="message"value="Hello China! It is China this time!" />
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</bean>
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</beans>
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packagespring_bean_post_processor;
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importorg.springframework.beans.BeansException;
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importorg.springframework.beans.factory.config.BeanPostProcessor;
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publicclassinitHelloWorldimplementsBeanPostProcessor {
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publicinitHelloWorld() {
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// TODO Auto-generated constructor stub
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}
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@Override
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publicObjectpostProcessAfterInitialization(Objectbean,StringbeanName)
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throwsBeansException {
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System.out.println("Before Initialization : " +beanName);
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returnbean;// you can return any other object as well
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}
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@Override
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publicObjectpostProcessBeforeInitialization(Objectbean,StringbeanName)
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throwsBeansException {
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System.out.println("After Initialization : " +beanName);
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returnbean;// you can return any other object as well
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}
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}

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