/**
* Re-initializes this container's Rabbit message consumers, if not initialized already. Then
* submits each consumer to this container's task executor.
*
* @throws Exception
*/
protected void doStart() throws Exception {
super.doStart();
synchronized (this.consumersMonitor) {
initializeConsumers();
if (this.consumers == null) {
logger.info(
"Consumers were initialized and then cleared (presumably the container was stopped concurrently)");
return;
}
Set<AsyncMessageProcessingConsumer> processors =
new HashSet<AsyncMessageProcessingConsumer>();
for (BlockingQueueConsumer consumer : this.consumers) {
AsyncMessageProcessingConsumer processor = new AsyncMessageProcessingConsumer(consumer);
processors.add(processor);
this.taskExecutor.execute(processor);
}
for (AsyncMessageProcessingConsumer processor : processors) {
FatalListenerStartupException startupException = processor.getStartupException();
if (startupException != null) {
throw new AmqpIllegalStateException(
"Fatal exception on listener startup", startupException);
}
}
}
}
protected void addAndStartConsumers(int delta) {
synchronized (this.consumersMonitor) {
if (this.consumers != null) {
for (int i = 0; i < delta; i++) {
BlockingQueueConsumer consumer = createBlockingQueueConsumer();
this.consumers.put(consumer, true);
AsyncMessageProcessingConsumer processor = new AsyncMessageProcessingConsumer(consumer);
this.taskExecutor.execute(processor);
try {
FatalListenerStartupException startupException = processor.getStartupException();
if (startupException != null) {
this.consumers.remove(consumer);
throw new AmqpIllegalStateException(
"Fatal exception on listener startup", startupException);
}
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
} catch (Exception e) {
consumer.stop();
logger.error("Error starting new consumer", e);
consumers.remove(consumer);
}
}
}
}
}
