Lazy Init Demo : IoC Init Beans « Spring « Java

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Java » Spring » IoC Init Beans Screenshots  Lazy Init Demo /* Pro Spring By Rob Harrop Jan Machacek ISBN: 1-59059-461-4 Publisher: Apress */ /////////////////////////////////////////////////////////////////////////////////////// //File: lazy.xml <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> <beans>     <bean id="destructiveBean" class="DestructiveBeanWithInterface">         <property name="filePath">             <value>c:/test.txt</value>         </property>     </bean>     <bean id="shutdownHook" class="ShutdownHookBean" lazy-init="false"/> </beans> /////////////////////////////////////////////////////////////////////////////////////// import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import org.springframework.beans.factory.DisposableBean; import org.springframework.beans.factory.InitializingBean; import org.springframework.beans.factory.config.ConfigurableListableBeanFactory; import org.springframework.beans.factory.xml.XmlBeanFactory; import org.springframework.core.io.FileSystemResource; public class DestructiveBeanWithInterface implements InitializingBean,         DisposableBean {     private InputStream is = null;     public String filePath = null;     public void afterPropertiesSet() throws Exception {         System.out.println("Initializing Bean");         if (filePath == null) {             throw new IllegalArgumentException(                     "You must specify the filePath property of " + DestructiveBean.class);         }         is = new FileInputStream(filePath);     }     public void destroy() {         System.out.println("Destroying Bean");         if (is != null) {             try {                 is.close();                 is = null;             } catch (IOException ex) {                 System.err.println("WARN: An IOException occured"                         + " trying to close the InputStream");             }         }     }     public void setFilePath(String filePath) {         this.filePath = filePath;     } } /////////////////////////////////////////////////////////////////////////////////////// import org.springframework.beans.BeansException; import org.springframework.beans.factory.BeanFactory; import org.springframework.beans.factory.BeanFactoryAware; import org.springframework.beans.factory.config.ConfigurableListableBeanFactory; public class ShutdownHookBean implements BeanFactoryAware,         Runnable {     private ConfigurableListableBeanFactory factory;     public void setBeanFactory(BeanFactory factory) throws BeansException {         if (factory instanceof ConfigurableListableBeanFactory) {             this.factory = (ConfigurableListableBeanFactory) factory;             Runtime.getRuntime().addShutdownHook(new Thread(this));         }     }     public void run() {         if (factory != null) {             System.out.println("Destroying Singletons");             factory.destroySingletons();             System.out.println("Singletons Destroyed");         }     } } /////////////////////////////////////////////////////////////////////////////////////// import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import org.springframework.beans.factory.InitializingBean; import org.springframework.beans.factory.config.ConfigurableListableBeanFactory; import org.springframework.beans.factory.xml.XmlBeanFactory; import org.springframework.core.io.FileSystemResource; public class DestructiveBean implements InitializingBean {     private InputStream is = null;     public String filePath = null;     public void afterPropertiesSet() throws Exception {         System.out.println("Initializing Bean");         if (filePath == null) {             throw new IllegalArgumentException(                     "You must specify the filePath property of " + DestructiveBean.class);         }         is = new FileInputStream(filePath);     }     public void destroy() {         System.out.println("Destroying Bean");         if (is != null) {             try {                 is.close();                 is = null;             } catch (IOException ex) {                 System.err.println("WARN: An IOException occured"                         + " trying to close the InputStream");             }         }     }     public void setFilePath(String filePath) {         this.filePath = filePath;     } } /////////////////////////////////////////////////////////////////////////////////////// import org.springframework.context.ApplicationContext; import org.springframework.context.support.FileSystemXmlApplicationContext; public class LazyInitDemo {     public static void main(String[] args) {         ApplicationContext ctx = new FileSystemXmlApplicationContext(                 "build/lazy.xml");         DestructiveBeanWithInterface bean = (DestructiveBeanWithInterface) ctx                 .getBean("destructiveBean");     } }                     LazyInitDemo.zip( 1,200 k) Related examples in the same category 1. Init Interface 2. SimpleBean Init Method