@Override
public void bufferReceived(Object connectionID, ActiveMQBuffer buffer) {
try {
dataReceived = true;
Command command = (Command) wireFormat.unmarshal(buffer);
boolean responseRequired = command.isResponseRequired();
int commandId = command.getCommandId();
// the connection handles pings, negotiations directly.
// and delegate all other commands to manager.
if (command.getClass() == KeepAliveInfo.class) {
KeepAliveInfo info = (KeepAliveInfo) command;
info.setResponseRequired(false);
// if we don't respond to KeepAlive commands then the client will think the server is dead
// and timeout
// for some reason KeepAliveInfo.isResponseRequired() is always false
protocolManager.sendReply(this, info);
} else if (command.getClass() == WireFormatInfo.class) {
// amq here starts a read/write monitor thread (detect ttl?)
negotiate((WireFormatInfo) command);
} else if (command.getClass() == ConnectionInfo.class
|| command.getClass() == ConsumerInfo.class
|| command.getClass() == RemoveInfo.class
|| command.getClass() == SessionInfo.class
|| command.getClass() == ProducerInfo.class
|| ActiveMQMessage.class.isAssignableFrom(command.getClass())
|| command.getClass() == MessageAck.class
|| command.getClass() == TransactionInfo.class
|| command.getClass() == DestinationInfo.class
|| command.getClass() == ShutdownInfo.class
|| command.getClass() == RemoveSubscriptionInfo.class) {
Response response = null;
if (pendingStop) {
response = new ExceptionResponse(this.stopError);
} else {
response = ((Command) command).visit(this);
if (response instanceof ExceptionResponse) {
if (!responseRequired) {
Throwable cause = ((ExceptionResponse) response).getException();
serviceException(cause);
response = null;
}
}
}
if (responseRequired) {
if (response == null) {
response = new Response();
}
}
// The context may have been flagged so that the response is not
// sent.
if (context != null) {
if (context.isDontSendReponse()) {
context.setDontSendReponse(false);
response = null;
}
}
if (response != null && !protocolManager.isStopping()) {
response.setCorrelationId(commandId);
dispatchSync(response);
}
} else {
// note!!! wait for negotiation (e.g. use a countdown latch)
// before handling any other commands
this.protocolManager.handleCommand(this, command);
}
} catch (IOException e) {
ActiveMQServerLogger.LOGGER.error("error decoding", e);
} catch (Throwable t) {
ActiveMQServerLogger.LOGGER.error("error decoding", t);
}
}
