}
public void send(final ProducerBrokerExchange producerExchange, final Message message) throws Exception {
final ConnectionContext context = producerExchange.getConnectionContext();
final ProducerInfo producerInfo = producerExchange.getProducerState().getInfo();
final boolean sendProducerAck = !message.isResponseRequired() && producerInfo.getWindowSize() > 0
&& !context.isInRecoveryMode();
// There is delay between the client sending it and it arriving at the
// destination.. it may have expired.
if (message.isExpired()) {
broker.messageExpired(context, message);
getDestinationStatistics().getExpired().increment();
if (sendProducerAck) {
ProducerAck ack = new ProducerAck(producerInfo.getProducerId(), message.getSize());
context.getConnection().dispatchAsync(ack);
}
return;
}
if (memoryUsage.isFull()) {
isFull(context, memoryUsage);
fastProducer(context, producerInfo);
if (isProducerFlowControl() && context.isProducerFlowControl()) {
if (warnOnProducerFlowControl) {
warnOnProducerFlowControl = false;
LOG
.info("Usage Manager memory limit ("
+ memoryUsage.getLimit()
+ ") reached for "
+ getActiveMQDestination().getQualifiedName()
+ ". Producers will be throttled to the rate at which messages are removed from this destination to prevent flooding it."
+ " See http://activemq.apache.org/producer-flow-control.html for more info");
}
if (systemUsage.isSendFailIfNoSpace()) {
throw new javax.jms.ResourceAllocationException("Usage Manager memory limit ("
+ memoryUsage.getLimit() + ") reached. Stopping producer (" + message.getProducerId()
+ ") to prevent flooding " + getActiveMQDestination().getQualifiedName() + "."
+ " See http://activemq.apache.org/producer-flow-control.html for more info");
}
// We can avoid blocking due to low usage if the producer is
// sending
// a sync message or
// if it is using a producer window
if (producerInfo.getWindowSize() > 0 || message.isResponseRequired()) {
synchronized (messagesWaitingForSpace) {
messagesWaitingForSpace.add(new Runnable() {
public void run() {
try {
// While waiting for space to free up... the
// message may have expired.
if (message.isExpired()) {
broker.messageExpired(context, message);
getDestinationStatistics().getExpired().increment();
} else {
doMessageSend(producerExchange, message);
}
if (sendProducerAck) {
ProducerAck ack = new ProducerAck(producerInfo.getProducerId(), message
.getSize());
context.getConnection().dispatchAsync(ack);
} else {
Response response = new Response();
response.setCorrelationId(message.getCommandId());
context.getConnection().dispatchAsync(response);
}
} catch (Exception e) {
if (!sendProducerAck && !context.isInRecoveryMode()) {
ExceptionResponse response = new ExceptionResponse(e);
response.setCorrelationId(message.getCommandId());
context.getConnection().dispatchAsync(response);
}
}
}
});
// If the user manager is not full, then the task will
// not
// get called..
if (!memoryUsage.notifyCallbackWhenNotFull(sendMessagesWaitingForSpaceTask)) {
// so call it directly here.
sendMessagesWaitingForSpaceTask.run();
}
context.setDontSendReponse(true);
return;
}
} else {
// Producer flow control cannot be used, so we have do the
// flow
// control at the broker
// by blocking this thread until there is space available.
if (memoryUsage.isFull()) {
if (context.isInTransaction()) {
int count = 0;
while (!memoryUsage.waitForSpace(1000)) {
if (context.getStopping().get()) {
throw new IOException("Connection closed, send aborted.");
}
if (count > 2 && context.isInTransaction()) {
count = 0;
int size = context.getTransaction().size();
LOG.warn("Waiting for space to send transacted message - transaction elements = "
+ size + " need more space to commit. Message = " + message);
}
}
} else {
waitForSpace(
context,
memoryUsage,
"Usage Manager memory limit reached. Stopping producer ("
+ message.getProducerId()
+ ") to prevent flooding "
+ getActiveMQDestination().getQualifiedName()
+ "."
+ " See http://activemq.apache.org/producer-flow-control.html for more info");
}
}
// The usage manager could have delayed us by the time
// we unblock the message could have expired..
if (message.isExpired()) {
getDestinationStatistics().getExpired().increment();
if (LOG.isDebugEnabled()) {
LOG.debug("Expired message: " + message);
}
return;
}
}
}
}
doMessageSend(producerExchange, message);
messageDelivered(context, message);
if (sendProducerAck) {
ProducerAck ack = new ProducerAck(producerInfo.getProducerId(), message.getSize());
context.getConnection().dispatchAsync(ack);
}
}