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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.qpid.server.exchange;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.FieldTable;
import org.apache.qpid.framing.BasicPublishBody;
import org.apache.qpid.server.queue.AMQQueue;
import org.apache.qpid.server.queue.AMQMessage;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.apache.qpid.server.management.MBeanDescription;
import org.apache.qpid.server.management.MBeanConstructor;
import javax.management.openmbean.*;
import javax.management.JMException;
import javax.management.MBeanException;
import javax.management.NotCompliantMBeanException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
public class DestWildExchange extends AbstractExchange
{
private static final Logger _logger = Logger.getLogger(DestWildExchange.class);
private ConcurrentHashMap<String, List<AMQQueue>> _routingKey2queues = new ConcurrentHashMap<String, List<AMQQueue>>();
/**
* DestWildExchangeMBean class implements the management interface for the
* Topic exchanges.
*/
@MBeanDescription("Management Bean for Topic Exchange")
private final class DestWildExchangeMBean extends ExchangeMBean
{
private String[] _bindingItemNames = {"BindingKey", "QueueNames"};
private String[] _bindingItemDescriptions = {"Binding key", "Queue Names"};
private String[] _bindingItemIndexNames = {"BindingKey"};
private OpenType[] _bindingItemTypes = new OpenType[2];
private CompositeType _bindingDataType = null;
private TabularType _bindinglistDataType = null;
private TabularDataSupport _bindingList = null;
@MBeanConstructor("Creates an MBean for AMQ topic exchange")
public DestWildExchangeMBean() throws NotCompliantMBeanException
{
super();
init();
}
/**
* initialises the OpenType objects.
*/
private void init()
{
try
{
_bindingItemTypes[0] = SimpleType.STRING;
_bindingItemTypes[1] = new ArrayType(1, SimpleType.STRING);
_bindingDataType = new CompositeType("QueueBinding",
"Binding key and bound Queue names",
_bindingItemNames,
_bindingItemDescriptions,
_bindingItemTypes);
_bindinglistDataType = new TabularType("Bindings",
"List of queue bindings for " + getName(),
_bindingDataType,
_bindingItemIndexNames);
}
catch(OpenDataException ex)
{
//It should never occur.
_logger.error("OpenDataTypes could not be created.", ex);
throw new RuntimeException(ex);
}
}
public TabularData viewBindings()
throws OpenDataException
{
_bindingList = new TabularDataSupport(_bindinglistDataType);
for (Map.Entry<String, List<AMQQueue>> entry : _routingKey2queues.entrySet())
{
String key = entry.getKey();
List<String> queueList = new ArrayList<String>();
List<AMQQueue> queues = entry.getValue();
for (AMQQueue q : queues)
{
queueList.add(q.getName());
}
Object[] bindingItemValues = {key, queueList.toArray(new String[0])};
CompositeData bindingData = new CompositeDataSupport(_bindingDataType,
_bindingItemNames,
bindingItemValues);
_bindingList.put(bindingData);
}
return _bindingList;
}
public void createBinding(String queueName, String binding)
throws JMException
{
AMQQueue queue = ApplicationRegistry.getInstance().getQueueRegistry().getQueue(queueName);
if (queue == null)
throw new JMException("Queue \"" + queueName + "\" is not registered with the exchange.");
try
{
registerQueue(binding, queue, null);
queue.bind(binding, DestWildExchange.this);
}
catch (AMQException ex)
{
throw new MBeanException(ex);
}
}
} // End of MBean class
public void registerQueue(String routingKey, AMQQueue queue, FieldTable args) throws AMQException
{
assert queue != null;
assert routingKey != null;
// we need to use putIfAbsent, which is an atomic operation, to avoid a race condition
List<AMQQueue> queueList = _routingKey2queues.putIfAbsent(routingKey, new CopyOnWriteArrayList<AMQQueue>());
// if we got null back, no previous value was associated with the specified routing key hence
// we need to read back the new value just put into the map
if (queueList == null)
{
queueList = _routingKey2queues.get(routingKey);
}
if (!queueList.contains(queue))
{
queueList.add(queue);
}
else if(_logger.isDebugEnabled())
{
_logger.debug("Queue " + queue + " is already registered with routing key " + routingKey);
}
}
public void route(AMQMessage payload) throws AMQException
{
BasicPublishBody publishBody = payload.getPublishBody();
final String routingKey = publishBody.routingKey;
List<AMQQueue> queues = _routingKey2queues.get(routingKey);
// if we have no registered queues we have nothing to do
// TODO: add support for the immediate flag
if (queues == null)
{
//todo Check for valid topic - mritchie
return;
}
for (AMQQueue q : queues)
{
// TODO: modify code generator to add clone() method then clone the deliver body
// without this addition we have a race condition - we will be modifying the body
// before the encoder has encoded the body for delivery
q.deliver(payload);
}
}
public void deregisterQueue(String routingKey, AMQQueue queue) throws AMQException
{
assert queue != null;
assert routingKey != null;
List<AMQQueue> queues = _routingKey2queues.get(routingKey);
if (queues == null)
{
throw new AMQException("Queue " + queue + " was not registered with exchange " + this.getName() +
" with routing key " + routingKey + ". No queue was registered with that routing key");
}
boolean removedQ = queues.remove(queue);
if (!removedQ)
{
throw new AMQException("Queue " + queue + " was not registered with exchange " + this.getName() +
" with routing key " + routingKey);
}
}
protected ExchangeMBean createMBean() throws AMQException
{
try
{
return new DestWildExchangeMBean();
}
catch (NotCompliantMBeanException ex)
{
_logger.error("Exception occured in creating the DestWildExchenge", ex);
throw new AMQException("Exception occured in creating the DestWildExchenge", ex);
}
}
}
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