io.bitsensor.plugins.shaded.org.springframework.amqp.rabbit.connection.ConsumerChannelRegistry Maven / Gradle / Ivy
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/*
* Copyright 2002-2016 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.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.bitsensor.plugins.shaded.io.bitsensor.plugins.shaded.org.springframework.amqp.rabbit.connection;
import io.bitsensor.plugins.shaded.org.apache.commons.logging.Log;
import io.bitsensor.plugins.shaded.org.apache.commons.logging.LogFactory;
import io.bitsensor.plugins.shaded.com.rabbitmq.client.Channel;
/**
* Consumers register their primary channels with this class. This is used
* to ensure that, when using transactions, the resource holder doesn't
* close the primary channel being used by the Consumer.
* This was previously in ConnectionFactoryUtils, but it caused a class
* tangle with RabbitResourceHolder.
*
* @author Gary Russell
* @since 1.2
*
*/
public final class ConsumerChannelRegistry {
private static final Log logger = LogFactory.getLog(ConsumerChannelRegistry.class);
private static final ThreadLocal consumerChannel = new ThreadLocal();
private ConsumerChannelRegistry() {
super();
}
/**
* If a listener container is configured to use a RabbitTransactionManager, the
* consumer's channel is registered here so that it is used as the bound resource
* when the transaction actually starts. It is normally not necessary to use
* an external transaction manager because local transactions work the same in that
* the channel is bound to the thread. This is for the case when a user happens
* to wire in a RabbitTransactionManager.
*
* @param channel The channel to register.
* @param connectionFactory The connection factory.
*/
public static void registerConsumerChannel(Channel channel, ConnectionFactory connectionFactory) {
if (logger.isDebugEnabled()) {
logger.debug("Registering consumer channel" + channel + " from factory " +
connectionFactory);
}
consumerChannel.set(new ChannelHolder(channel, connectionFactory));
}
/**
* See registerConsumerChannel. This method is called to unregister
* the channel when the consumer exits.
*/
public static void unRegisterConsumerChannel() {
if (logger.isDebugEnabled()) {
logger.debug("Unregistering consumer channel" + consumerChannel.get());
}
consumerChannel.remove();
}
/**
* See registerConsumerChannel. This method is called to retrieve the
* channel for this consumer.
*
* @return The channel.
*/
public static Channel getConsumerChannel() {
ChannelHolder channelHolder = consumerChannel.get();
Channel channel = null;
if (channelHolder != null) {
channel = channelHolder.getChannel();
}
return channel;
}
/**
* See registerConsumerChannel. This method is called to retrieve the
* channel for this consumer if the connection factory matches.
*
* @param connectionFactory The connection factory.
* @return The channel.
*/
public static Channel getConsumerChannel(ConnectionFactory connectionFactory) {
ChannelHolder channelHolder = consumerChannel.get();
Channel channel = null;
if (channelHolder != null && channelHolder.getConnectionFactory() == connectionFactory) {
channel = channelHolder.getChannel();
}
return channel;
}
private static final class ChannelHolder {
private final Channel channel;
private final ConnectionFactory connectionFactory;
private ChannelHolder(Channel channel, ConnectionFactory connectionFactory) {
this.channel = channel;
this.connectionFactory = connectionFactory;
}
private Channel getChannel() {
return this.channel;
}
private ConnectionFactory getConnectionFactory() {
return this.connectionFactory;
}
}
}