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JMS SimpleMessageListenerContainer silently falls back to lazy registration of consumers ()

This commit is contained in:
Juergen Hoeller 2012-01-15 19:53:40 +01:00
parent 4a63a5b3ba
commit 3fdbe1081d
1 changed files with 33 additions and 3 deletions
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36
org.springframework.jms/src/main/java/org/springframework/jms/listener/SimpleMessageListenerContainer.java
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@ -1,5 +1,5 @@
/*
* Copyright 2002-2010 the original author or authors.
* Copyright 2002-2012 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -62,6 +62,8 @@ public class SimpleMessageListenerContainer extends AbstractMessageListenerConta
private boolean pubSubNoLocal = false;
private boolean connectLazily = false;
private int concurrentConsumers = 1;
private Executor taskExecutor;
@ -89,6 +91,20 @@ public class SimpleMessageListenerContainer extends AbstractMessageListenerConta
return this.pubSubNoLocal;
}
/**
* Specify whether to connect lazily, i.e. whether to establish the JMS Connection
* and the corresponding Sessions and MessageConsumers as late as possible -
* in the start phase of this container.
* <p>Default is "false": connecting early, i.e. during the bean initialization phase.
* Set this flag to "true" in order to switch to lazy connecting if your target broker
* is likely to not have started up yet and you prefer to not even try a connection.
* @see #start()
* @see #initialize()
*/
public void setConnectLazily(boolean connectLazily) {
this.connectLazily = connectLazily;
}
/**
* Specify concurrency limits via a "lower-upper" String, e.g. "5-10", or a simple
* upper limit String, e.g. "10".
@ -159,6 +175,7 @@ public class SimpleMessageListenerContainer extends AbstractMessageListenerConta
this.taskExecutor = taskExecutor;
}
@Override
protected void validateConfiguration() {
super.validateConfiguration();
if (isSubscriptionDurable() && this.concurrentConsumers != 1) {
@ -174,6 +191,7 @@ public class SimpleMessageListenerContainer extends AbstractMessageListenerConta
/**
* Always use a shared JMS Connection.
*/
@Override
protected final boolean sharedConnectionEnabled() {
return true;
}
@ -183,15 +201,25 @@ public class SimpleMessageListenerContainer extends AbstractMessageListenerConta
* in the form of a JMS Session plus associated MessageConsumer.
* @see #createListenerConsumer
*/
@Override
protected void doInitialize() throws JMSException {
establishSharedConnection();
initializeConsumers();
if (!this.connectLazily) {
try {
establishSharedConnection();
}
catch (JMSException ex) {
logger.debug("Could not connect on initialization - registering message consumers lazily", ex);
return;
}
initializeConsumers();
}
}
/**
* Re-initializes this container's JMS message consumers,
* if not initialized already.
*/
@Override
protected void doStart() throws JMSException {
super.doStart();
initializeConsumers();
@ -200,6 +228,7 @@ public class SimpleMessageListenerContainer extends AbstractMessageListenerConta
/**
* Registers this listener container as JMS ExceptionListener on the shared connection.
*/
@Override
protected void prepareSharedConnection(Connection connection) throws JMSException {
super.prepareSharedConnection(connection);
connection.setExceptionListener(this);
@ -320,6 +349,7 @@ public class SimpleMessageListenerContainer extends AbstractMessageListenerConta
/**
* Destroy the registered JMS Sessions and associated MessageConsumers.
*/
@Override
protected void doShutdown() throws JMSException {
logger.debug("Closing JMS MessageConsumers");
for (MessageConsumer consumer : this.consumers) {