| /* |
| * |
| * 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.qpid.framing.AMQShortString; |
| import org.apache.qpid.framing.FieldTable; |
| import org.apache.qpid.server.binding.Binding; |
| import org.apache.qpid.server.message.InboundMessage; |
| import org.apache.qpid.server.plugin.ExchangeType; |
| import org.apache.qpid.server.queue.AMQQueue; |
| import org.apache.qpid.server.queue.BaseQueue; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.CopyOnWriteArraySet; |
| |
| public class DirectExchange extends AbstractExchange |
| { |
| private static final class BindingSet |
| { |
| private CopyOnWriteArraySet<Binding> _bindings = new CopyOnWriteArraySet<Binding>(); |
| private List<BaseQueue> _queues = new ArrayList<BaseQueue>(); |
| |
| public synchronized void addBinding(Binding binding) |
| { |
| _bindings.add(binding); |
| recalculateQueues(); |
| } |
| |
| public synchronized void removeBinding(Binding binding) |
| { |
| _bindings.remove(binding); |
| recalculateQueues(); |
| } |
| |
| private void recalculateQueues() |
| { |
| List<BaseQueue> queues = new ArrayList<BaseQueue>(_bindings.size()); |
| |
| for(Binding b : _bindings) |
| { |
| if(!queues.contains(b.getQueue())) |
| { |
| queues.add(b.getQueue()); |
| } |
| } |
| _queues = queues; |
| } |
| |
| |
| public List<BaseQueue> getQueues() |
| { |
| return _queues; |
| } |
| |
| public CopyOnWriteArraySet<Binding> getBindings() |
| { |
| return _bindings; |
| } |
| } |
| |
| private final ConcurrentHashMap<String, BindingSet> _bindingsByKey = |
| new ConcurrentHashMap<String, BindingSet>(); |
| |
| public static final ExchangeType<DirectExchange> TYPE = new DirectExchangeType(); |
| |
| public DirectExchange() |
| { |
| super(TYPE); |
| } |
| |
| public List<? extends BaseQueue> doRoute(InboundMessage payload) |
| { |
| |
| final String routingKey = payload.getRoutingKey(); |
| |
| BindingSet bindings = _bindingsByKey.get(routingKey == null ? "" : routingKey); |
| |
| if(bindings != null) |
| { |
| return bindings.getQueues(); |
| } |
| else |
| { |
| return Collections.emptyList(); |
| } |
| |
| |
| |
| } |
| |
| public boolean isBound(AMQShortString routingKey, FieldTable arguments, AMQQueue queue) |
| { |
| return isBound(routingKey,queue); |
| } |
| |
| public boolean isBound(AMQShortString routingKey, AMQQueue queue) |
| { |
| String bindingKey = (routingKey == null) ? "" : routingKey.toString(); |
| BindingSet bindings = _bindingsByKey.get(bindingKey); |
| if(bindings != null) |
| { |
| return bindings.getQueues().contains(queue); |
| } |
| return false; |
| |
| } |
| |
| public boolean isBound(AMQShortString routingKey) |
| { |
| String bindingKey = (routingKey == null) ? "" : routingKey.toString(); |
| BindingSet bindings = _bindingsByKey.get(bindingKey); |
| return bindings != null && !bindings.getQueues().isEmpty(); |
| } |
| |
| public boolean isBound(AMQQueue queue) |
| { |
| |
| for (BindingSet bindings : _bindingsByKey.values()) |
| { |
| if(bindings.getQueues().contains(queue)) |
| { |
| return true; |
| } |
| |
| } |
| return false; |
| } |
| |
| public boolean hasBindings() |
| { |
| return !getBindings().isEmpty(); |
| } |
| |
| protected void onBind(final Binding binding) |
| { |
| String bindingKey = binding.getBindingKey(); |
| AMQQueue queue = binding.getQueue(); |
| AMQShortString routingKey = AMQShortString.valueOf(bindingKey); |
| |
| assert queue != null; |
| assert routingKey != null; |
| |
| BindingSet bindings = _bindingsByKey.get(bindingKey); |
| |
| if(bindings == null) |
| { |
| bindings = new BindingSet(); |
| BindingSet newBindings; |
| if((newBindings = _bindingsByKey.putIfAbsent(bindingKey, bindings)) != null) |
| { |
| bindings = newBindings; |
| } |
| } |
| |
| bindings.addBinding(binding); |
| |
| } |
| |
| protected void onUnbind(final Binding binding) |
| { |
| assert binding != null; |
| |
| BindingSet bindings = _bindingsByKey.get(binding.getBindingKey()); |
| if(bindings != null) |
| { |
| bindings.removeBinding(binding); |
| } |
| |
| } |
| |
| |
| } |