Glassfish example source code file (HelloBean.java)

This example Glassfish source code file (HelloBean.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, asynchronous, asynchronous, asyncresult, asyncresult, concurrentaccessexception, ejb, exception, exception, future, future, hellobean, illegalargumentexception, postconstruct, predestroy, servlet, sessioncontext, threading, threads, web

The Glassfish HelloBean.java source code

/*
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 *
 * Copyright (c) 2009-2010 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:
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 * 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
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 * 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
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 */

package remoteview;

import javax.ejb.*;
import javax.annotation.*;
import java.util.concurrent.Future;

@Stateless(mappedName="HH")
@RemoteHome(HelloHome.class)
@Remote(Hello.class)
@TransactionManagement(TransactionManagementType.BEAN)
public class HelloBean {

    @Resource
	private SessionContext sessionCtx;

    @PostConstruct
    public void init() {
	System.out.println("In HelloBean::init()");
    }

    public String hello() {
	System.out.println("In HelloBean::hello()");
	return "hello, world\n";
    }

    @Asynchronous
    public Future<String> helloAsync() {
	System.out.println("In HelloBean::helloAsync()");
	return new AsyncResult<String>("helo, async world!\n");
    }

    @Asynchronous
    public Future<String> asyncBlock(int seconds) {
	System.out.println("In HelloBean::asyncBlock");
	sleep(seconds);
	return new AsyncResult<String>("blocked successfully");
    }

    @Asynchronous 
    public void fireAndForget() {
	System.out.println("In HelloBean::fireAndForget()");
	sleep(5);
    }
	
    @Asynchronous 
    public Future<String> asyncThrowException(String exceptionType) {
	System.out.println("In HelloBean::asyncThrowException");
	throwException(exceptionType);
	return new AsyncResult<String>("should have thrown exception");
    }

    @Asynchronous 
    public Future<String> asyncCancel(int seconds) throws Exception
    {
	System.out.println("In HelloBean::asyncCancel");
	sleep(seconds);
	if( sessionCtx.wasCancelCalled() ) {
	    throw new Exception("Canceled after " + seconds + " seconds");
	}
	return new AsyncResult<String>("asyncCancel() should have been cancelled");
    }

    public void throwException(String exceptionType) {
	if( exceptionType.equals("javax.ejb.EJBException") ) {
	    throw new EJBException(exceptionType);
	} else if( exceptionType.equals("javax.ejb.ConcurrentAccessException") ) {
	    throw new ConcurrentAccessException(exceptionType);
	} else if( exceptionType.equals("javax.ejb.ConcurrentAccessTimeoutException") ) {
	    throw new ConcurrentAccessTimeoutException(exceptionType);
	} else if( exceptionType.equals("javax.ejb.IllegalLoopbackException") ) {
	    throw new IllegalLoopbackException(exceptionType);
	}

	throw new IllegalArgumentException(exceptionType);
    }

    private void sleep(int seconds) {

	System.out.println("In HelloBean::sleeping for " + seconds + 
			   "seconds");
	try {
	    Thread.currentThread().sleep(seconds * 1000);
	    System.out.println("In HelloBean::woke up from " + seconds + 
			       "second sleep");
	} catch(Exception e) {
	    e.printStackTrace();
	}

    }


    @PreDestroy
    public void destroy() {
	System.out.println("In HelloBean::destroy()");
    }


}