001: /*
002: * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/cluster/MulticastSender.java,v 1.4 2001/07/22 20:25:06 pier Exp $
003: * $Revision: 1.4 $
004: * $Date: 2001/07/22 20:25:06 $
005: *
006: * ====================================================================
007: *
008: * The Apache Software License, Version 1.1
009: *
010: * Copyright (c) 1999 The Apache Software Foundation. All rights
011: * reserved.
012: *
013: * Redistribution and use in source and binary forms, with or without
014: * modification, are permitted provided that the following conditions
015: * are met:
016: *
017: * 1. Redistributions of source code must retain the above copyright
018: * notice, this list of conditions and the following disclaimer.
019: *
020: * 2. Redistributions in binary form must reproduce the above copyright
021: * notice, this list of conditions and the following disclaimer in
022: * the documentation and/or other materials provided with the
023: * distribution.
024: *
025: * 3. The end-user documentation included with the redistribution, if
026: * any, must include the following acknowlegement:
027: * "This product includes software developed by the
028: * Apache Software Foundation (http://www.apache.org/)."
029: * Alternately, this acknowlegement may appear in the software itself,
030: * if and wherever such third-party acknowlegements normally appear.
031: *
032: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
033: * Foundation" must not be used to endorse or promote products derived
034: * from this software without prior written permission. For written
035: * permission, please contact apache@apache.org.
036: *
037: * 5. Products derived from this software may not be called "Apache"
038: * nor may "Apache" appear in their names without prior written
039: * permission of the Apache Group.
040: *
041: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
042: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
043: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
044: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
045: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
046: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
047: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
048: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
049: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
050: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
051: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
052: * SUCH DAMAGE.
053: * ====================================================================
054: *
055: * This software consists of voluntary contributions made by many
056: * individuals on behalf of the Apache Software Foundation. For more
057: * information on the Apache Software Foundation, please see
058: * <http://www.apache.org/>.
059: *
060: * [Additional notices, if required by prior licensing conditions]
061: *
062: */
063:
064: package org.apache.catalina.cluster;
065:
066: import java.net.DatagramPacket;
067: import java.net.InetAddress;
068: import java.net.MulticastSocket;
069: import java.io.InputStream;
070: import java.io.OutputStream;
071: import java.io.BufferedOutputStream;
072: import java.io.ByteArrayOutputStream;
073: import java.io.IOException;
074: import java.io.ObjectOutputStream;
075: import java.io.ObjectStreamClass;
076:
077: /**
078: * This class is responsible for sending outgoing multicast
079: * packets to a Cluster.
080: *
081: * @author Bip Thelin
082: * @version $Revision: 1.4 $, $Date: 2001/07/22 20:25:06 $
083: */
084:
085: public class MulticastSender extends ClusterSessionBase implements
086: ClusterSender {
087:
088: // ----------------------------------------------------- Instance Variables
089:
090: /**
091: * The unique message ID
092: */
093: private static String senderId = null;
094:
095: /**
096: * The name of our component, used for logging.
097: */
098: private String senderName = "MulticastSender";
099:
100: /**
101: * The MulticastSocket to use
102: */
103: private MulticastSocket multicastSocket = null;
104:
105: /**
106: * The multicastAdress this socket is bound to
107: */
108: private InetAddress multicastAddress = null;
109:
110: /**
111: * The multicastPort this socket is bound to
112: */
113: private int multicastPort;
114:
115: // --------------------------------------------------------- Public Methods
116:
117: /**
118: * Create a new MulticastSender, only receivers with our
119: * senderId will receive our data.
120: *
121: * @param senderId The senderId
122: * @param multicastSocket the socket to use
123: * @param multicastAddress the address to use
124: * @param multicastPort the port to use
125: */
126: MulticastSender(String senderId, MulticastSocket multicastSocket,
127: InetAddress multicastAddress, int multicastPort) {
128: this .multicastAddress = multicastAddress;
129: this .multicastPort = multicastPort;
130: this .multicastSocket = multicastSocket;
131: this .senderId = senderId;
132: }
133:
134: /**
135: * Return a <code>String</code> containing the name of this
136: * implementation, used for logging
137: *
138: * @return The name of the implementation
139: */
140: public String getName() {
141: return (this .senderName);
142: }
143:
144: /**
145: * Send an object using a multicastSocket
146: *
147: * @param o The object to be sent.
148: */
149: public void send(Object o) {
150: ObjectOutputStream oos = null;
151: ByteArrayOutputStream bos = null;
152:
153: try {
154: bos = new ByteArrayOutputStream();
155: oos = new ObjectOutputStream(new BufferedOutputStream(bos));
156:
157: oos.writeObject(o);
158: oos.flush();
159:
160: byte[] obs = bos.toByteArray();
161:
162: send(obs);
163: } catch (IOException e) {
164: log(sm.getString("multicastSender.sendException", e
165: .toString()));
166: }
167: }
168:
169: /**
170: * Send multicast data
171: *
172: * @param b data to be sent
173: */
174: public void send(byte[] b) {
175: ReplicationWrapper out = new ReplicationWrapper(b, senderId);
176: ObjectOutputStream oos = null;
177: ByteArrayOutputStream bos = null;
178:
179: try {
180: bos = new ByteArrayOutputStream();
181: oos = new ObjectOutputStream(new BufferedOutputStream(bos));
182:
183: oos.writeObject(out);
184: oos.flush();
185:
186: byte[] obs = bos.toByteArray();
187: int size = obs.length;
188: DatagramPacket p = new DatagramPacket(obs, size,
189: multicastAddress, multicastPort);
190: send(p);
191: } catch (IOException e) {
192: log(sm.getString("multicastSender.sendException", e
193: .toString()));
194: }
195: }
196:
197: /**
198: * Send multicast data
199: *
200: * @param p data to be sent
201: */
202: private synchronized void send(DatagramPacket p) {
203: try {
204: multicastSocket.send(p);
205: } catch (IOException e) {
206: log(sm.getString("multicastSender.sendException", e
207: .toString()));
208: }
209: }
210: }
|