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Glassfish example source code file (SystemInterceptorProxy.java)

This example Glassfish source code file (SystemInterceptorProxy.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Glassfish tags/keywords

annotation, aroundtimeout, class, exception, interceptordescriptor, io, lifecyclecallbackdescriptor, lifecyclecallbackdescriptor, method, method, object, object, postconstruct, reflection, systeminterceptorproxy, throwable, throwable, util

The Glassfish SystemInterceptorProxy.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.ejb.containers.interceptors;

import javax.interceptor.AroundInvoke;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.interceptor.AroundTimeout;
import javax.interceptor.InvocationContext;
import com.sun.enterprise.deployment.InterceptorDescriptor;
import com.sun.enterprise.deployment.LifecycleCallbackDescriptor;
import static com.sun.enterprise.deployment.LifecycleCallbackDescriptor.CallbackType;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;

import java.io.Serializable;

/** 
 *
 * @author Kenneth Saks
 */    

public class SystemInterceptorProxy
{
    // Won't actually be Serialized since it only applies to Stateless/Singleton

    public Object delegate;

    private Method postConstruct;
    private Method preDestroy;
    private Method aroundInvoke;
    private Method aroundTimeout;


    public void setDelegate(Object d) {
             
        Class delegateClass = d.getClass();

        try {

           for(Method m : delegateClass.getDeclaredMethods() ) {

               if( m.getAnnotation(PostConstruct.class) != null ) {
                   postConstruct = m;
                   prepareMethod(m);
               } else if( m.getAnnotation(PreDestroy.class) != null ) {
                   preDestroy = m;
                   prepareMethod(m);
               } else if( m.getAnnotation(AroundInvoke.class) != null ) {
                   aroundInvoke = m;
                   prepareMethod(m);
               } else if( m.getAnnotation(AroundTimeout.class) != null ) {
                   aroundTimeout = m;
                   prepareMethod(m);                         
               }
           }

        } catch(Exception e) {
            throw new IllegalArgumentException(e);
        }

         delegate = d;

    }

    private void prepareMethod(final Method m) throws Exception {

         java.security.AccessController
                        .doPrivileged(new java.security.PrivilegedExceptionAction() {
                    public java.lang.Object run() throws Exception {
                        if (!m.isAccessible()) {
                            m.setAccessible(true);
                        }
                        return null;
                    }});

    }

    @PostConstruct
    public void init(InvocationContext ctx) throws Throwable {
        doCallback(ctx, postConstruct);
    }

    @PreDestroy
    public void destroy(InvocationContext ctx) throws Throwable {
        doCallback(ctx, preDestroy);
    }


    private void doCallback(InvocationContext ctx, Method m) throws Throwable {

        if( (delegate != null) && (m != null) ) {
            try {
                m.invoke(delegate, ctx);
            } catch(InvocationTargetException ite) {
                throw ite.getCause();
            }
        } else {
            ctx.proceed();
        }
    }

    @AroundInvoke
    public Object aroundInvoke(InvocationContext ctx) throws Throwable {
        return doAround(ctx, aroundInvoke);
    }

    @AroundTimeout
    public Object aroundTimeout(InvocationContext ctx) throws Throwable {
        return doAround(ctx, aroundTimeout);
    }

    private Object doAround(InvocationContext ctx, Method m) throws Throwable {
        Object returnValue = null;

        if( (delegate != null) && (m != null) ) {
            try {
                returnValue = m.invoke(delegate, ctx);
            } catch(InvocationTargetException ite) {
                throw ite.getCause();
            }
        } else {
            returnValue = ctx.proceed();
        }

        return returnValue;

    }

    public static InterceptorDescriptor createInterceptorDesc() {

        InterceptorDescriptor interceptor = new InterceptorDescriptor();

        Class interceptorClass = SystemInterceptorProxy.class;
        String interceptorName = interceptorClass.getName();

        interceptor.setInterceptorClass(interceptorClass);

        {
               LifecycleCallbackDescriptor desc = new LifecycleCallbackDescriptor();
               desc.setLifecycleCallbackClass(interceptorName);
               desc.setLifecycleCallbackMethod("init");
               interceptor.addCallbackDescriptor(CallbackType.POST_CONSTRUCT, desc);
        }

        {
               LifecycleCallbackDescriptor desc = new LifecycleCallbackDescriptor();
               desc.setLifecycleCallbackClass(interceptorName);
               desc.setLifecycleCallbackMethod("destroy");
               interceptor.addCallbackDescriptor(CallbackType.PRE_DESTROY, desc);
        }
        
        {
               LifecycleCallbackDescriptor desc = new LifecycleCallbackDescriptor();
               desc.setLifecycleCallbackClass(interceptorName);
               desc.setLifecycleCallbackMethod("aroundInvoke");
               interceptor.addAroundInvokeDescriptor(desc);
        }

        {
               LifecycleCallbackDescriptor desc = new LifecycleCallbackDescriptor();
               desc.setLifecycleCallbackClass(interceptorName);
               desc.setLifecycleCallbackMethod("aroundTimeout");
               interceptor.addAroundTimeoutDescriptor(desc);
        }


        return interceptor;

    }


}

Other Glassfish examples (source code examples)

Here is a short list of links related to this Glassfish SystemInterceptorProxy.java source code file:

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