Java/Spring/IoC Shutdown

Dispose Interface

   <source lang="java">

/* Pro Spring By Rob Harrop Jan Machacek ISBN: 1-59059-461-4 Publisher: Apress

• /

/////////////////////////////////////////////////////////////////////////////////////// //File: disposeMethod.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>

</beans> /////////////////////////////////////////////////////////////////////////////////////// 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 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;
   }
   public static void main(String[] args) throws Exception {
       ConfigurableListableBeanFactory factory = new XmlBeanFactory(
               new FileSystemResource(
                       "build/disposeInterface.xml"));
       DestructiveBeanWithInterface bean = (DestructiveBeanWithInterface) factory.getBean("destructiveBean");
       System.out.println("Calling destroySingletons()");
       factory.destroySingletons();
       System.out.println("Called destroySingletons()");
   }

}

      </source>
   
  
 
  

Shutdown Hook Bean Example

   <source lang="java">

/* Pro Spring By Rob Harrop Jan Machacek ISBN: 1-59059-461-4 Publisher: Apress

• /

/////////////////////////////////////////////////////////////////////////////////////// //File: shutdownHookBean.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"/>

</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.beans.factory.config.ConfigurableListableBeanFactory; import org.springframework.beans.factory.xml.XmlBeanFactory; import org.springframework.core.io.FileSystemResource; public class ShutdownHookBeanExample {

   public static void main(String[] args) {
       ConfigurableListableBeanFactory factory = new XmlBeanFactory(
               new FileSystemResource(
                       "build/shutdownHook.xml"));
       // make sure the shutdown hook is created
       factory.preInstantiateSingletons();
       DestructiveBeanWithInterface bean = (DestructiveBeanWithInterface) factory.getBean("destructiveBean");
   }

}

      </source>
   
  
 
  

Shutdown Hook Example

   <source lang="java">

/* Pro Spring By Rob Harrop Jan Machacek ISBN: 1-59059-461-4 Publisher: Apress

• /

/////////////////////////////////////////////////////////////////////////////////////// //File: disposeInterface.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>

</beans> /////////////////////////////////////////////////////////////////////////////////////// import org.springframework.beans.factory.config.ConfigurableListableBeanFactory; public class ShutdownHook implements Runnable {

   private ConfigurableListableBeanFactory factory;
   
   public ShutdownHook(ConfigurableListableBeanFactory factory) {
       this.factory = factory;
   }
   
   public void run() {
       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.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;
   }
   public static void main(String[] args) throws Exception {
       ConfigurableListableBeanFactory factory = new XmlBeanFactory(
               new FileSystemResource(
                       "build/disposeInterface.xml"));
       DestructiveBeanWithInterface bean = (DestructiveBeanWithInterface) factory.getBean("destructiveBean");
       System.out.println("Calling destroySingletons()");
       factory.destroySingletons();
       System.out.println("Called destroySingletons()");
   }

} /////////////////////////////////////////////////////////////////////////////////////// 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.beans.factory.config.ConfigurableListableBeanFactory; import org.springframework.beans.factory.xml.XmlBeanFactory; import org.springframework.core.io.FileSystemResource; public class ShutdownHookExample {

   public static void main(String[] args) {
       ConfigurableListableBeanFactory factory = new XmlBeanFactory(
               new FileSystemResource(
                       "build/disposeInterface.xml"));
       Runtime.getRuntime().addShutdownHook(
               new Thread(new ShutdownHook(factory)));
       DestructiveBeanWithInterface bean = (DestructiveBeanWithInterface) factory.getBean("destructiveBean");
   }

}

      </source>