// JMSCommunicationThread
@Override
protected void createProducersAndConsumers() throws Exception {
final String configuration = model.getConfigurationName();
// Write (if allowed) and also read the client topic
if (model.isWriteAllowed())
client_producer = createProducer(Preferences.getJMS_AlarmClientTopic(configuration));
else client_producer = null;
client_consumer = createConsumer(Preferences.getJMS_AlarmClientTopic(configuration));
// Read messages from server
server_consumer = createConsumer(Preferences.getJMS_AlarmServerTopic(configuration));
// Handle MapMessages
final MessageListener message_listener =
new MessageListener() {
@Override
public void onMessage(final Message message) {
if (message instanceof MapMessage) handleMapMessage((MapMessage) message);
else
Activator.getLogger()
.log(Level.WARNING, "Message type {0} not handled", message.getClass().getName());
}
};
client_consumer.setMessageListener(message_listener);
server_consumer.setMessageListener(message_listener);
}
/** Invoked for received messages */
private void handleMapMessage(final MapMessage message) {
try {
final String text = message.getString(JMSLogMessage.TEXT);
Runnable action = null;
// Create action, or handle the message right away
// Alarm state change?
if (JMSAlarmMessage.TEXT_STATE.equals(text)) {
// Received a state update from server, reset timeout
timeout_timer.reset();
action = new UpdateAction(AlarmUpdateInfo.fromMapMessage(message));
model.updateServerState(false);
} else if (JMSAlarmMessage.TEXT_STATE_MAINTENANCE.equals(text)) {
timeout_timer.reset();
action = new UpdateAction(AlarmUpdateInfo.fromMapMessage(message));
model.updateServerState(true);
}
// Idle messages in absence of 'real' traffic?
else if (JMSAlarmMessage.TEXT_IDLE.equals(text)) {
timeout_timer.reset();
model.updateServerState(false);
} else if (JMSAlarmMessage.TEXT_IDLE_MAINTENANCE.equals(text)) {
timeout_timer.reset();
model.updateServerState(true);
}
// Enable/disable?
else if (JMSAlarmMessage.TEXT_ENABLE.equals(text)) {
timeout_timer.reset();
final String name = message.getString(JMSLogMessage.NAME);
action = new EnableAction(name, true);
} else if (JMSAlarmMessage.TEXT_DISABLE.equals(text)) {
timeout_timer.reset();
final String name = message.getString(JMSLogMessage.NAME);
action = new EnableAction(name, false);
}
// Configuration change
else if (JMSAlarmMessage.TEXT_CONFIG.equals(text)) {
final String name = message.getString(JMSLogMessage.NAME);
model.readConfig(name);
}
// Debug trigger
else if (JMSAlarmMessage.TEXT_DEBUG.equals(text)) model.dump();
if (action == null) return;
// Queue or dispatch?
synchronized (queue) {
if (use_queue) {
queue.execute(action);
return;
}
}
// else: Not using queue, and queue no longer locked
action.run();
} catch (Throwable ex) {
Activator.getLogger().log(Level.SEVERE, "Message handler error", ex);
}
}
/**
* Create message initialized with basic alarm & application info
*
* @param text TEXT property
* @return MapMessage
* @throws Exception on error.
*/
private MapMessage createMapMessage(final String text) throws Exception {
final MapMessage map = createMapMessage();
map.setString(JMSLogMessage.TYPE, JMSAlarmMessage.TYPE_ALARM);
map.setString(JMSAlarmMessage.CONFIG, model.getConfigurationName());
map.setString(JMSLogMessage.TEXT, text);
map.setString(JMSLogMessage.APPLICATION_ID, APPLICATION);
map.setString(JMSLogMessage.HOST, host);
User loggedUser = SecurityFacade.getInstance().getCurrentUser();
if (loggedUser == null) // if no user logged in...
user = System.getProperty("user.name"); // $NON-NLS-1$
else user = loggedUser.getUsername();
map.setString(JMSLogMessage.USER, user);
return map;
}
@Override
protected void timeout() {
model.fireServerTimeout();
}
