Glassfish example source code file (ServletConnection.java)

This example Glassfish source code file (ServletConnection.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

bytearrayoutputstream, inputstream, io, ioexception, ioexception, log, logging, net, network, object, objectinputstream, objectoutputstream, objectoutputstream, servletconnection, streammbeanserverrequestmessage, streammbeanserverrequestmessage, streammbeanserverresponsemessage, string, string

The Glassfish ServletConnection.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2006-2010 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.
 */

/* CVS information
 * $Header: /cvs/glassfish/jmx-remote/rjmx-impl/src/java/com/sun/enterprise/admin/jmx/remote/comm/ServletConnection.java,v 1.4 2005/12/25 04:26:31 tcfujii Exp $
 * $Revision: 1.4 $
 * $Date: 2005/12/25 04:26:31 $
*/

package com.sun.enterprise.admin.jmx.remote.comm;

//jdk imports
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.net.URLConnection;
import java.net.HttpURLConnection;
import java.net.URL;
/* BEGIN -- S1WS_MOD */
import java.io.InputStream;
import java.io.OutputStream;
import java.util.logging.Logger;
/* END -- S1WS_MOD */

import com.sun.enterprise.admin.jmx.remote.DefaultConfiguration;
/* BEGIN -- S1WS_MOD */
import com.sun.enterprise.admin.jmx.remote.streams.*;
/* END -- S1WS_MOD */

/** A packager private Class (implementing {@link IConnection} communicating 
 * with Servlet over HTTP. Internally it uses java.net.URLConnection,
 * for we may need to use it for both HTTP and HTTPS. In case of
 * java.net.HttpURLConnection, only HTTP can be used. The server side (servlet etc)
 * has to be configured as documented, for this connection to work.
 * @author Kedar Mhaswade
 * @since S1AS8.0
 * @version 1.0
 */

class ServletConnection implements IConnection, Runnable {
	static final String         UNKNOWN_HOST            = "Unknown host : ";
	static final String         INVALID_HOST_PORT       = "Unable to connect to admin-server.  Please check if the server is up and running and that the host and port provided are correct.";
	static final String         UNAUTHORIZED_ACCESS     =
	"Invalid user or password";
	
	private URLConnection        mConnection           = null;
	private ObjectOutputStream   mObjectOutStream      = null;
	private ObjectInputStream    mObjectInStream       = null;
	
/* BEGIN -- S1WS_MOD */
    private static final Logger logger = Logger.getLogger(
        DefaultConfiguration.JMXCONNECTOR_LOGGER);/*, 
        DefaultConfiguration.LOGGER_RESOURCE_BUNDLE_NAME );*/

    private boolean response_received =false;
    private int streamSize = 0;
    private int reqSize = 0;
/* END -- S1WS_MOD */

	ServletConnection(HttpConnectorAddress a) throws IOException {
		try{
/* BEGIN -- S1WS_MOD */
            //mConnection = a.openConnection(DefaultConfiguration.DEFAULT_SERVLET_CONTEXT_ROOT);
            String uri = a.getPath();
            if (uri == null || uri.trim().length() == 0)
                uri = DefaultConfiguration.DEFAULT_SERVLET_CONTEXT_ROOT;
			mConnection = a.openConnection(uri);
/* END -- S1WS_MOD */
		}
		catch (IOException ioe){
			handleException(ioe);
		}
	}
	
	
	/**
	 Read an incoming Object.
	 */
	public  Object receive(  ) throws IOException, ClassNotFoundException {
		Object value = null;
		try {
            InputStream in = mConnection.getInputStream();
			mObjectInStream = new ObjectInputStream(in);
			value = mObjectInStream.readObject();
            response_received = true;
            JMXInbandStream.setOutputStream(null, 0);
            StreamMBeanServerResponseMessage res = 
                (StreamMBeanServerResponseMessage) value;
            if (res.isStreamAvailable()) {
                JMXInbandStream.setIncomingStream(
                    new JMXChunkedInputStream(in));
            }
		}
		catch (IOException ioe) {
			handleException(ioe);
		}
		return value;
	}
	
	/**
	 Write an object to the connection
	 */
	public  void	send(Serializable req)
            throws IOException {
        InputStream in = null;
        if (req instanceof StreamMBeanServerRequestMessage) {
            StreamMBeanServerRequestMessage reqm =
                    (StreamMBeanServerRequestMessage) req;
            JMXInbandStream.setIncomingStream(null);
            in = JMXInbandStream.getOutgoingStream();
            if (in != null) {
                reqm.setStreamAvailable(true);
                int len = (int) JMXInbandStream.getOutgoingStreamLength();

                ByteArrayOutputStream byO = new ByteArrayOutputStream();
                ObjectOutputStream oO = new ObjectOutputStream(byO);
                oO.writeObject(reqm);
                reqSize = byO.size();
                byO.reset();

                int chunks = (len/8192) + 2;
                streamSize = reqSize + len + (chunks * 4);
                ((HttpURLConnection)mConnection).setFixedLengthStreamingMode(streamSize);
                mConnection.setRequestProperty("Connection", "Close");
            }
        }
        sendReq(req);
        if (in != null)
            sendStream();
    }

    private void sendStream() {
/*        Thread thr = new Thread(this);
        thr.start();
*/
        run();
    }

    public void run() {
        OutputStream out = null;
        try {
            out = new JMXChunkedOutputStream(mConnection.getOutputStream());
            InputStream in   = JMXInbandStream.getOutgoingStream();
            byte[] bytes = new byte[8192];
            int len = 0;
            int prLen = 0;
            int flBytes = 0;
            while ((len = in.read(bytes)) != -1) {
                out.write(bytes, 0, len);
            }
            JMXInbandStream.setOutputStream(null, 0);
            out.flush();
            ((JMXChunkedOutputStream)out).writeEOF(reqSize);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

	private  void	sendReq( Serializable object ) throws IOException {
        response_received = false;
		try {
			mObjectOutStream = new ObjectOutputStream(
			new BufferedOutputStream(mConnection.getOutputStream()));
			mObjectOutStream.writeObject(object);
			mObjectOutStream.flush();
			//mObjectOutStream.close();
		}
		catch (IOException ioe) {
			handleException(ioe);
		}
	}
	
	public void	close() {
		try {
			mObjectInStream.close();
			mObjectOutStream.close();
		}
		catch(Exception e) {
			throw new RuntimeException (e);
		}
	}
	
	
	private void handleException(IOException e) throws IOException {
		IOException exception = null;
		if (e instanceof java.net.UnknownHostException) {
			exception = new java.net.UnknownHostException(UNKNOWN_HOST +
			e.getMessage());
		}
		else if (e instanceof java.net.ConnectException) {
			exception = new java.net.ConnectException(INVALID_HOST_PORT);
		}
		else {
			int responseCode =
			((HttpURLConnection)mConnection).getResponseCode();
			if (responseCode == HttpURLConnection.HTTP_UNAUTHORIZED) {
				exception = new IOException(UNAUTHORIZED_ACCESS);
			}
			else {
				exception = e;
			}
		}
		throw exception;
	}
}