/**
* Dispatches a message to the appropriate receiver.
*
* <p>It will buffer the message under the following conditions: 1) The MessageReceiver is not yet
* registered. 2) The MessageReceiver is a PastryAppl, and localNode.isReady() == false
*
* @param msg the message.
* @return true if message could be dispatched, false otherwise.
*/
public boolean dispatchMessage(Message msg) {
if (msg.getDestination() == 0) {
Logger logger =
localNode.getEnvironment().getLogManager().getLogger(MessageDispatch.class, null);
if (logger.level <= Logger.WARNING)
logger.logException(
"Message " + msg + "," + msg.getClass().getName() + " has no destination.",
new Exception("Stack Trace"));
return false;
}
// NOTE: There is no safety issue with calling localNode.isReady() because this is on the
// PastryThread, and the only way to set a node ready is also on the ready thread.
PastryAppl mr = (PastryAppl) addressBook.get(Integer.valueOf(msg.getDestination()));
if (mr == null) {
if ((logger.level <= Logger.FINE) || (localNode.isReady() && (logger.level <= Logger.INFO))) {
logger.log(
"Dropping message "
+ msg
+ " because the application address "
+ msg.getDestination()
+ " is unknown.");
}
return false;
} else {
mr.receiveMessage(msg);
return true;
}
}
/**
* Stop listening for messages of the given type with the given listener.
*
* @param m specify message type and template we're listening for
* @param listener destination for received messages
*/
public void deregisterListener(Message template, MessageListener listener) {
Integer amType = new Integer(template.amType());
Vector vec = (Vector) templateTbl.get(amType);
if (vec == null) {
throw new IllegalArgumentException(
"No listeners registered for message type "
+ template.getClass().getName()
+ " (AM type "
+ template.amType()
+ ")");
}
msgTemplate mt = new msgTemplate(template, listener);
// Remove all occurrences
while (vec.removeElement(mt)) ;
if (vec.size() == 0) templateTbl.remove(amType);
}
public void handleMessageData(int length, MVByteBuffer messageData, AgentInfo agentInfo) {
if (length == -1 || messageData == null) {
if ((agentInfo.flags & MessageAgent.DOMAIN_FLAG_TRANSIENT) != 0) {
Log.info("Lost connection to '" + agentInfo.agentName + "' (transient)");
agents.remove(agentInfo.socket);
agentNames.remove(agentInfo.agentName);
messageIO.removeAgent(agentInfo);
} else Log.info("Lost connection to '" + agentInfo.agentName + "'");
try {
agentInfo.socket.close();
} catch (java.io.IOException ex) {
Log.exception("close", ex);
}
agentInfo.socket = null;
// ## clear buffers
// ## keep agentInfo? to preserve agentId?
return;
}
Message message = (Message) MarshallingRuntime.unmarshalObject(messageData);
MessageType msgType = message.getMsgType();
if (Log.loggingDebug)
Log.debug(
"handleMessageData from "
+ agentInfo.agentName
+ ","
+ message.getMsgId()
+ " type="
+ msgType.getMsgTypeString()
+ " len="
+ length
+ " class="
+ message.getClass().getName());
try {
if (message instanceof AllocNameMessage)
handleAllocName((AllocNameMessage) message, agentInfo.socket);
else if (message instanceof AwaitPluginDependentsMessage)
handleAwaitPluginDependents((AwaitPluginDependentsMessage) message, agentInfo.socket);
else if (message instanceof PluginAvailableMessage)
handlePluginAvailable((PluginAvailableMessage) message, agentInfo.socket);
else
Log.error(
"Unsupported message from "
+ agentInfo.agentName
+ ","
+ message.getMsgId()
+ " type="
+ msgType.getMsgTypeString()
+ " len="
+ length
+ " class="
+ message.getClass().getName());
} catch (java.io.IOException e) {
Log.error(
"IO error on message from "
+ agentInfo.agentName
+ ","
+ message.getMsgId()
+ " type="
+ msgType.getMsgTypeString()
+ " len="
+ length
+ " class="
+ message.getClass().getName());
}
}
