private boolean isExplicitReceiver(ACLMessage msg, AID receiver) {
Iterator it = msg.getAllIntendedReceiver();
while (it.hasNext()) {
if (receiver.equals(it.next())) {
return true;
}
}
return false;
}
/**
* Dispatch a message to an agent in the FrontEnd. If this method is called by a thread that is
* serving a message sent by an agent in the FrontEnd too, nothing is done as the dispatch has
* already taken place in the FrontEnd (see messageOut()).
*/
public boolean postMessageToLocalAgent(ACLMessage msg, AID receiverID) {
// Try first in the LADT
boolean found = super.postMessageToLocalAgent(msg, receiverID);
if (found) {
return found;
} else {
// The receiver must be in the FrontEnd
AgentImage image = (AgentImage) agentImages.get(receiverID);
if (image != null) {
if (agentImages.containsKey(msg.getSender()) && isExplicitReceiver(msg, receiverID)) {
// The message was sent by an agent living in the FrontEnd. The
// receiverID (living in the FrontEnd too) has already received
// the message.
// The second part of the condition ensures that, if the
// message was not directly sent to the receiver (e.g. it was sent to a topic
// or an alias), message delivery occurs normally.
// FIXME: This does not take into account that an agent not living
// in the FrontEnd may send a message on behalf of an agent living
// in the FrontEnd.
return true;
}
try {
// Forward the message to the FrontEnd
int size;
if (msg.hasByteSequenceContent()) {
size = msg.getByteSequenceContent().length;
} else {
size = msg.getContent() != null ? msg.getContent().length() : 0;
}
myLogger.log(
Logger.INFO,
getID()
+ " - Delivering IN message "
+ ACLMessage.getPerformative(msg.getPerformative())
+ ", size="
+ size);
myFrontEnd.messageIn(msg, receiverID.getLocalName());
handlePosted(receiverID, msg);
return true;
} catch (NotFoundException nfe) {
System.out.println("WARNING: Missing agent in FrontEnd");
return false;
} catch (IMTPException imtpe) {
System.out.println("WARNING: Can't deliver message to FrontEnd");
return false;
}
} else {
// Agent not found
System.out.println("WARNING: Agent " + receiverID + " not found on BackEnd container");
return false;
}
}
}
/** An agent has just died on the FrontEnd. Remove its image and notify the Main */
public void deadAgent(String name) throws IMTPException {
AID id = new AID(name, AID.ISLOCALNAME);
myLogger.log(Logger.INFO, getID() + " - Handling termination of agent " + id.getLocalName());
handleEnd(id);
}
public boolean connect() {
try {
// Initialize the BackEndManager if required
if (myProfile.getBooleanProperty(USE_BACKEND_MANAGER, false)) {
theBEManager = initBEManager();
}
Vector agentSpecs =
Specifier.parseSpecifierList(myProfile.getParameter(Profile.AGENTS, null));
myProfile.setParameter(Profile.AGENTS, null);
myFrontEnd = myConnectionManager.getFrontEnd(this, null);
myLogger.log(
Logger.FINE,
"BackEnd container "
+ myProfile.getParameter(Profile.CONTAINER_NAME, null)
+ " joining the platform ... (FrontEnd version: "
+ myProfile.getParameter(JICPProtocol.VERSION_KEY, "not available")
+ ")");
Runtime.instance().beginContainer();
boolean connected = joinPlatform();
if (connected) {
myLogger.log(Logger.FINE, "Join platform OK");
AID amsAID = getAMS();
myProfile.setParameter(Profile.PLATFORM_ID, amsAID.getHap());
String[] addresses = amsAID.getAddressesArray();
if (addresses != null) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < addresses.length; i++) {
sb.append(addresses[i]);
if (i < addresses.length - 1) {
sb.append(';');
}
}
myProfile.setParameter(MicroRuntime.PLATFORM_ADDRESSES_KEY, sb.toString());
}
if ("true".equals(myProfile.getParameter(RESYNCH, "false"))) {
myLogger.log(
Logger.INFO,
"BackEnd container "
+ myProfile.getParameter(Profile.CONTAINER_NAME, null)
+ " activating re-synch ...");
resynch();
} else {
// Notify the main container about bootstrap agents on the FE.
for (int i = 0; i < agentSpecs.size(); i++) {
Specifier sp = (Specifier) agentSpecs.elementAt(i);
try {
String name = bornAgent(sp.getName());
sp.setClassName(name);
sp.setArgs(null);
} catch (Exception e) {
myLogger.log(Logger.SEVERE, "Error creating agent " + sp.getName(), e);
sp.setClassName(e.getClass().getName());
sp.setArgs(new Object[] {e.getMessage()});
}
}
myProfile.setParameter(Profile.AGENTS, Specifier.encodeSpecifierList(agentSpecs));
}
}
return connected;
} catch (Exception e) {
// Should never happen
e.printStackTrace();
return false;
}
}