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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.queue;
import java.util.HashSet;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.framing.FieldTable;
import org.apache.qpid.server.exchange.Exchange;
/**
* When a queue is deleted, it should be deregistered from any
* exchange it has been bound to. This class assists in this task,
* by keeping track of all bindings for a given queue.
*/
class ExchangeBindings
{
private final List<ExchangeBinding> _bindings = new CopyOnWriteArrayList<ExchangeBinding>();
private final AMQQueue _queue;
ExchangeBindings(AMQQueue queue)
{
_queue = queue;
}
/**
* Adds the specified binding to those being tracked.
* @param routingKey the routing key with which the queue whose bindings
* are being tracked by the instance has been bound to the exchange
* @param exchange the exchange bound to
*/
void addBinding(AMQShortString routingKey, FieldTable arguments, Exchange exchange)
{
_bindings.add(new ExchangeBinding(routingKey, exchange, _queue, arguments));
}
public boolean remove(AMQShortString routingKey, FieldTable arguments, Exchange exchange)
{
return _bindings.remove(new ExchangeBinding(routingKey, exchange, _queue, arguments));
}
/**
* Deregisters this queue from any exchange it has been bound to
*/
void deregister() throws AMQException
{
//remove duplicates at this point
HashSet<ExchangeBinding> copy = new HashSet<ExchangeBinding>(_bindings);
for (ExchangeBinding b : copy)
{
b.unbind(_queue);
}
}
List<ExchangeBinding> getExchangeBindings()
{
return _bindings;
}
}
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