org.sample.nonblocking.MyWriteListener.java Source code

Introduction

Here is the source code for org.sample.nonblocking.MyWriteListener.java

Source

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013 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 org.sample.nonblocking;

import java.io.IOException;
import java.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.AsyncContext;
import javax.servlet.ServletOutputStream;
import javax.servlet.WriteListener;

/**
 * @author Arun Gupta
 */
public class MyWriteListener implements WriteListener {

    private ServletOutputStream output = null;
    private AsyncContext context = null;

    public MyWriteListener(ServletOutputStream out, AsyncContext ac) {
        this.output = out;
        this.context = ac;
    }

    @Override
    public void onWritePossible() {
        if (output.isReady()) {
            try {
                byte[] b = new byte[100];
                Arrays.fill(b, 0, 100, (byte) 'a');
                output.write(b);
            } catch (IOException ex) {
                Logger.getLogger(MyWriteListener.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }

    @Override
    public void onError(Throwable t) {
        t.printStackTrace();
        context.complete();
    }
}