/**
* 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);
}
/**
* Register a particular listener for a particular message type. More than one listener can be
* registered for each message type.
*
* @param m specify message type and template we're listening for
* @param listener destination for received messages
*/
public void registerListener(Message template, MessageListener listener) {
Integer amType = new Integer(template.amType());
Vector vec = (Vector) templateTbl.get(amType);
if (vec == null) {
vec = new Vector();
}
vec.addElement(new msgTemplate(template, listener));
templateTbl.put(amType, vec);
}
public static void main(String[] args) throws Exception {
String source = null;
Vector v = new Vector();
if (args.length > 0) {
for (int i = 0; i < args.length; i++) {
if (args[i].equals("-comm")) {
source = args[++i];
} else {
String className = args[i];
try {
Class c = Class.forName(className);
Object packet = c.newInstance();
Message msg = (Message) packet;
if (msg.amType() < 0) {
System.err.println(className + " does not have an AM type - ignored");
} else {
v.addElement(msg);
}
} catch (Exception e) {
System.err.println(e);
}
}
}
} else if (args.length != 0) {
usage();
System.exit(1);
}
MsgReader mr = new MsgReader(source);
Enumeration msgs = v.elements();
while (msgs.hasMoreElements()) {
Message m = (Message) msgs.nextElement();
mr.addMsgType(m);
}
mr.start();
}