private void advertiseHeartbeat() {
String advStr =
"[class,eq,"
+ HeartbeatSubscriber.MESSAGE_CLASS
+ "],"
+ "[brokerID,isPresent,'TEXT'],"
+ "[fromID,eq,'"
+ m_BrokerCore.getBrokerID()
+ "'],"
+ "[type,isPresent,'TEXT'],"
+ "[handle,isPresent,'TEXT']";
Advertisement adv;
try {
adv = MessageFactory.createAdvertisementFromString(advStr);
} catch (ParseException e) {
exceptionLogger.error(e.getMessage());
return;
}
AdvertisementMessage msg =
new AdvertisementMessage(
adv, m_BrokerCore.getNewMessageID(), MessageDestination.HEARTBEAT_MANAGER);
msg.setTTL(1);
heartbeatLogger.debug("Sending initial advertisement for heartbeat.");
m_BrokerCore.routeMessage(msg, MessageDestination.INPUTQUEUE);
}
protected void unAdvertiseAll(BrokerState brokerState) throws ClientException {
if (!clientConfig.detailState)
throw new ClientException("unAdertiseAll() not supported with client.store_detail_state=OFF");
MessageDestination clientDest =
MessageDestination.formatClientDestination(
clientID, brokerState.getBrokerAddress().getNodeURI());
MessageSender msgSender = brokerState.getMsgSender();
if (msgSender == null)
throw new ClientException(
"Connection not found for broker " + brokerState.getBrokerAddress());
AdvertisementMessage[] advMsgArray =
brokerState.getAdvMessages().toArray(new AdvertisementMessage[0]);
for (AdvertisementMessage advMsg : advMsgArray) {
Unadvertisement unAdv = new Unadvertisement(advMsg.getMessageID());
UnadvertisementMessage unAdvMsg =
new UnadvertisementMessage(
unAdv, getNextMessageID(brokerState.getBrokerAddress().getNodeURI()), clientDest);
try {
msgSender.send(unAdvMsg, HostType.CLIENT);
brokerState.removeAdvMsg(advMsg);
} catch (CommunicationException e) {
throw new ClientException(e.getMessage());
}
}
}
/**
* Returns all the advertisement messages the client has sent in the past. This method is
* operational only when the store_detail_state option is switched ON.
*
* @return
* @throws ClientException If the client.store_detail_state option is OFF
*/
public Map<String, AdvertisementMessage> getAdvertisements() throws ClientException {
if (!clientConfig.detailState)
throw new ClientException(
"getAdvertisements() not supported with client.store_detail_state=OFF");
HashMap<String, AdvertisementMessage> idMsgMap = new HashMap<String, AdvertisementMessage>();
for (BrokerState brokerState : brokerStates.values()) {
Set<AdvertisementMessage> advs = brokerState.getAdvMessages();
for (AdvertisementMessage advMsg : advs) idMsgMap.put(advMsg.getMessageID(), advMsg);
}
return idMsgMap;
}
/**
* Sends an advertisement to a given broker.
*
* @param adv The advertisement to be sent. It is an {@link Advertisement} object.
* @param brokerURI The URI of the broker to where the advertisement is sent.
* @return The {@link AdvertisementMessage} produced by the given advertisement. The message ID of
* the message is returned by the broker.
* @throws ClientException If the given URI is malformatted, the client is not connected to the
* broker, or there is a communication error while sending the advertisement.
*/
public AdvertisementMessage advertise(Advertisement adv, String brokerURI)
throws ClientException {
if (!isConnected()) throw new ClientException("Not connected to any broker");
try {
if (brokerURI == null || brokerURI.equals("")) brokerURI = defaultBrokerAddress.getNodeURI();
BrokerState brokerState = getBrokerState(brokerURI);
if (brokerState == null) {
throw new ClientException("Not connected to broker " + brokerURI);
}
MessageDestination clientDest =
MessageDestination.formatClientDestination(
clientID, brokerState.getBrokerAddress().getNodeURI());
AdvertisementMessage advMsg =
new AdvertisementMessage(
adv, getNextMessageID(brokerState.getBrokerAddress().getNodeURI()), clientDest);
String msgID = brokerState.getMsgSender().send(advMsg, HostType.CLIENT);
advMsg.setMessageID(msgID);
if (clientConfig.detailState) brokerState.addAdvMsg(advMsg);
return advMsg;
} catch (CommunicationException e) {
throw new ClientException(e.getMessage());
}
}
