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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.topic;
import org.apache.qpid.server.queue.AMQQueue;
import org.apache.qpid.server.binding.Binding;
import org.apache.qpid.server.filter.MessageFilter;
import org.apache.qpid.server.message.InboundMessage;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
public final class TopicExchangeResult implements TopicMatcherResult
{
private final List<Binding> _bindings = new CopyOnWriteArrayList<Binding>();
private final Map<AMQQueue, Integer> _unfilteredQueues = new ConcurrentHashMap<AMQQueue, Integer>();
private final ConcurrentHashMap<AMQQueue, Map<MessageFilter,Integer>> _filteredQueues = new ConcurrentHashMap<AMQQueue, Map<MessageFilter, Integer>>();
private volatile ArrayList<AMQQueue> _unfilteredQueueList = new ArrayList<AMQQueue>(0);
public void addUnfilteredQueue(AMQQueue queue)
{
Integer instances = _unfilteredQueues.get(queue);
if(instances == null)
{
_unfilteredQueues.put(queue, 1);
ArrayList<AMQQueue> newList = new ArrayList<AMQQueue>(_unfilteredQueueList);
newList.add(queue);
_unfilteredQueueList = newList;
}
else
{
_unfilteredQueues.put(queue, instances + 1);
}
}
public void removeUnfilteredQueue(AMQQueue queue)
{
Integer instances = _unfilteredQueues.get(queue);
if(instances == 1)
{
_unfilteredQueues.remove(queue);
ArrayList<AMQQueue> newList = new ArrayList<AMQQueue>(_unfilteredQueueList);
newList.remove(queue);
_unfilteredQueueList = newList;
}
else
{
_unfilteredQueues.put(queue,instances - 1);
}
}
public Collection<AMQQueue> getUnfilteredQueues()
{
return _unfilteredQueues.keySet();
}
public void addBinding(Binding binding)
{
_bindings.add(binding);
}
public void removeBinding(Binding binding)
{
_bindings.remove(binding);
}
public List<Binding> getBindings()
{
return new ArrayList<Binding>(_bindings);
}
public void addFilteredQueue(AMQQueue queue, MessageFilter filter)
{
Map<MessageFilter,Integer> filters = _filteredQueues.get(queue);
if(filters == null)
{
filters = new ConcurrentHashMap<MessageFilter,Integer>();
_filteredQueues.put(queue, filters);
}
Integer instances = filters.get(filter);
if(instances == null)
{
filters.put(filter,1);
}
else
{
filters.put(filter, instances + 1);
}
}
public void removeFilteredQueue(AMQQueue queue, MessageFilter filter)
{
Map<MessageFilter,Integer> filters = _filteredQueues.get(queue);
if(filters != null)
{
Integer instances = filters.get(filter);
if(instances != null)
{
if(instances == 1)
{
filters.remove(filter);
if(filters.isEmpty())
{
_filteredQueues.remove(queue);
}
}
else
{
filters.put(filter, instances - 1);
}
}
}
}
public void replaceQueueFilter(AMQQueue queue,
MessageFilter oldFilter,
MessageFilter newFilter)
{
Map<MessageFilter,Integer> filters = _filteredQueues.get(queue);
Map<MessageFilter,Integer> newFilters = new ConcurrentHashMap<MessageFilter,Integer>(filters);
Integer oldFilterInstances = filters.get(oldFilter);
if(oldFilterInstances == 1)
{
newFilters.remove(oldFilter);
}
else
{
newFilters.put(oldFilter, oldFilterInstances-1);
}
Integer newFilterInstances = filters.get(newFilter);
if(newFilterInstances == null)
{
newFilters.put(newFilter, 1);
}
else
{
newFilters.put(newFilter, newFilterInstances+1);
}
_filteredQueues.put(queue,newFilters);
}
public Collection<AMQQueue> processMessage(InboundMessage msg, Collection<AMQQueue> queues)
{
if(queues == null)
{
if(_filteredQueues.isEmpty())
{
return _unfilteredQueueList;
}
else
{
queues = new HashSet<AMQQueue>();
}
}
else if(!(queues instanceof Set))
{
queues = new HashSet<AMQQueue>(queues);
}
queues.addAll(_unfilteredQueues.keySet());
if(!_filteredQueues.isEmpty())
{
for(Map.Entry<AMQQueue, Map<MessageFilter, Integer>> entry : _filteredQueues.entrySet())
{
if(!queues.contains(entry.getKey()))
{
for(MessageFilter filter : entry.getValue().keySet())
{
if(filter.matches(msg))
{
queues.add(entry.getKey());
}
}
}
}
}
return queues;
}
}
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