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4 * The Sun Project JXTA(TM) Software License
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54 * This license is based on the BSD license adopted by the Apache Foundation.
56 package net.jxta.impl.endpoint.cbjx;
59 import net.jxta.endpoint.EndpointAddress;
60 import net.jxta.endpoint.Message;
61 import net.jxta.endpoint.Messenger;
62 import net.jxta.impl.endpoint.BlockingMessenger;
63 import net.jxta.logging.Logging;
65 import java.io.IOException;
66 import java.util.logging.Level;
67 import java.util.logging.Logger;
71 * This class is the Messenger used to send CbJx Messages
73 public class CbJxMessenger extends BlockingMessenger {
78 private final static transient Logger LOG = Logger.getLogger(CbJxMessenger.class.getName());
81 * the new destination address computed by the CbJx Endpoint
82 * this address is of the form jxta://<peerID>/CbJxService/<peerGroupID>
84 private final EndpointAddress newDestAddr;
87 * A string which we can lock on while acquiring new messengers. We don't
88 * want to lock the whole object.
90 private final Object acquireMessengerLock = new String("Messenger Acquire Lock");
93 * Cached messenger for sending to {@link #newDestAddr}
95 private Messenger outBoundMessenger = null;
98 * The transport we are working for.
100 private final CbJxTransport transport;
105 * @param dest the destination address
107 public CbJxMessenger(CbJxTransport transport, EndpointAddress dest, Object hintIgnored) throws IOException {
108 this(transport, dest);
114 * @param dest the destination address
116 public CbJxMessenger(CbJxTransport transport, EndpointAddress dest) throws IOException {
118 // Do not use self destruction. There's nothing we have that can't just let be GC'ed
119 super(transport.group.getPeerGroupID(), dest, false);
121 this.transport = transport;
123 newDestAddr = new EndpointAddress("jxta", dest.getProtocolAddress(), CbJxTransport.cbjxServiceName, null);
125 outBoundMessenger = transport.endpoint.getMessengerImmediate(newDestAddr, null);
127 if (null == outBoundMessenger) {
128 if (Logging.SHOW_SEVERE && LOG.isLoggable(Level.SEVERE)) {
129 LOG.severe("Could not get messenger for " + newDestAddr);
132 throw new IOException("Could not get messenger for " + newDestAddr);
140 public void closeImpl() {
141 synchronized (acquireMessengerLock) {
142 outBoundMessenger.close();
143 outBoundMessenger = null;
151 public EndpointAddress getLogicalDestinationImpl() {
158 * Since CbJx is a virtual transport and consumes very few resources there
159 * is no point to doing idle teardown.
162 public boolean isIdleImpl() {
170 public void sendMessageBImpl(Message msg, String service, String serviceParam) throws IOException {
173 EndpointAddress destAddressToUse = getDestAddressToUse(service, serviceParam);
175 if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
176 LOG.fine("Messenger: sending out " + msg + " to: " + destAddressToUse);
179 // add the cbjx info to the message
180 msg = transport.addCryptoInfo(msg, destAddressToUse);
183 IOException failure = new IOException("Messenger was closed, it cannot be used to send messages.");
185 if (Logging.SHOW_INFO && LOG.isLoggable(Level.INFO)) {
186 LOG.info(failure.toString());
192 // and sends out the message
197 * Send a message via the underlying messenger.
199 * @param msg The message to send to the remote peer.
200 * @throws IOException if there was a problem sending the message.
202 void sendTo( Message msg ) throws IOException {
204 synchronized (acquireMessengerLock) {
205 if ((null == outBoundMessenger) || outBoundMessenger.isClosed()) {
207 if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
208 LOG.fine("Getting messenger for " + newDestAddr);
211 outBoundMessenger = transport.endpoint.getMessengerImmediate(newDestAddr, null);
213 if (outBoundMessenger == null) {
214 if (Logging.SHOW_SEVERE && LOG.isLoggable(Level.SEVERE)) {
215 LOG.severe("Could not get messenger for " + newDestAddr);
218 throw new IOException("Underlying messenger could not be repaired");
223 if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
224 LOG.fine("Sending " + msg + " to endpoint " + newDestAddr);
227 // Good we have a messenger. Send the message.
228 outBoundMessenger.sendMessageB(msg, null, null);