/*
*
* 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.model.adapter;
import java.security.AccessControlException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.qpid.AMQException;
import org.apache.qpid.AMQInternalException;
import org.apache.qpid.AMQSecurityException;
import org.apache.qpid.protocol.AMQConstant;
import org.apache.qpid.server.binding.Binding;
import org.apache.qpid.server.exchange.ExchangeRegistry;
import org.apache.qpid.server.model.ConfiguredObject;
import org.apache.qpid.server.model.Exchange;
import org.apache.qpid.server.model.IllegalStateTransitionException;
import org.apache.qpid.server.model.LifetimePolicy;
import org.apache.qpid.server.model.Publisher;
import org.apache.qpid.server.model.Queue;
import org.apache.qpid.server.model.State;
import org.apache.qpid.server.model.Statistics;
import org.apache.qpid.server.plugin.ExchangeType;
import org.apache.qpid.server.queue.AMQQueue;
import org.apache.qpid.server.virtualhost.VirtualHost;
final class ExchangeAdapter extends AbstractAdapter implements Exchange, org.apache.qpid.server.exchange.Exchange.BindingListener
{
private final org.apache.qpid.server.exchange.Exchange _exchange;
private final Map<Binding, BindingAdapter> _bindingAdapters =
new HashMap<Binding, BindingAdapter>();
private VirtualHostAdapter _vhost;
private final ExchangeStatistics _statistics;
public ExchangeAdapter(final VirtualHostAdapter virtualHostAdapter,
final org.apache.qpid.server.exchange.Exchange exchange)
{
super(exchange.getId());
_statistics = new ExchangeStatistics();
_vhost = virtualHostAdapter;
_exchange = exchange;
addParent(org.apache.qpid.server.model.VirtualHost.class, virtualHostAdapter);
exchange.addBindingListener(this);
populateBindings();
}
private void populateBindings()
{
Collection<Binding> actualBindings = _exchange.getBindings();
synchronized (_bindingAdapters)
{
for(Binding binding : actualBindings)
{
if(!_bindingAdapters.containsKey(binding))
{
QueueAdapter queueAdapter = _vhost.getQueueAdapter(binding.getQueue());
BindingAdapter adapter = new BindingAdapter(binding, this, queueAdapter);
_bindingAdapters.put(binding, adapter);
queueAdapter.bindingRegistered(binding, adapter);
}
}
}
}
public String getExchangeType()
{
return _exchange.getType().getName().toString();
}
public Collection<org.apache.qpid.server.model.Binding> getBindings()
{
synchronized (_bindingAdapters)
{
return new ArrayList<org.apache.qpid.server.model.Binding>(_bindingAdapters.values());
}
}
public Collection<Publisher> getPublishers()
{
// TODO
return Collections.emptyList();
}
public org.apache.qpid.server.model.Binding createBinding(Queue queue,
Map<String, Object> attributes)
throws AccessControlException, IllegalStateException
{
attributes = new HashMap<String, Object>(attributes);
String bindingKey = getStringAttribute(org.apache.qpid.server.model.Binding.NAME, attributes, "");
Map<String, Object> bindingArgs = getMapAttribute(org.apache.qpid.server.model.Binding.ARGUMENTS, attributes, Collections.EMPTY_MAP);
attributes.remove(org.apache.qpid.server.model.Binding.NAME);
attributes.remove(org.apache.qpid.server.model.Binding.ARGUMENTS);
return createBinding(bindingKey, queue, bindingArgs, attributes);
}
public org.apache.qpid.server.model.Binding createBinding(String bindingKey, Queue queue,
Map<String, Object> bindingArguments,
Map<String, Object> attributes)
throws AccessControlException, IllegalStateException
{
VirtualHost virtualHost = _vhost.getVirtualHost();
AMQQueue amqQueue = ((QueueAdapter)queue).getAMQQueue();
try
{
if(!virtualHost.getBindingFactory().addBinding(bindingKey, amqQueue, _exchange, bindingArguments))
{
Binding oldBinding = virtualHost.getBindingFactory().getBinding(bindingKey, amqQueue, _exchange,
bindingArguments);
Map<String, Object> oldArgs = oldBinding.getArguments();
if((oldArgs == null && !bindingArguments.isEmpty()) || (oldArgs != null && !oldArgs.equals(bindingArguments)))
{
virtualHost.getBindingFactory().replaceBinding(oldBinding.getId(), bindingKey, amqQueue, _exchange, bindingArguments);
}
}
Binding binding = virtualHost.getBindingFactory().getBinding(bindingKey, amqQueue, _exchange, bindingArguments);
synchronized (_bindingAdapters)
{
return binding == null ? null : _bindingAdapters.get(binding);
}
}
catch(AMQSecurityException e)
{
throw new AccessControlException(e.toString());
}
catch(AMQInternalException e)
{
throw new IllegalStateException(e);
}
}
public void delete()
{
try
{
ExchangeRegistry exchangeRegistry = _vhost.getVirtualHost().getExchangeRegistry();
if (exchangeRegistry.isReservedExchangeName(getName()))
{
throw new UnsupportedOperationException("'" + getName() + "' is a reserved exchange and can't be deleted");
}
if(_exchange.hasReferrers())
{
throw new AMQException( AMQConstant.NOT_ALLOWED, "Exchange in use as an alternate exchange", null);
}
synchronized(exchangeRegistry)
{
exchangeRegistry.unregisterExchange(getName(), false);
}
}
catch(AMQException e)
{
throw new IllegalStateException(e);
}
}
public String getName()
{
return _exchange.getName();
}
public String setName(final String currentName, final String desiredName)
throws IllegalStateException, AccessControlException
{
return null; //TODO
}
public State getActualState()
{
return null; //TODO
}
public boolean isDurable()
{
return _exchange.isDurable();
}
public void setDurable(final boolean durable)
throws IllegalStateException, AccessControlException, IllegalArgumentException
{
//TODO
}
public LifetimePolicy getLifetimePolicy()
{
return _exchange.isAutoDelete() ? LifetimePolicy.AUTO_DELETE : LifetimePolicy.PERMANENT;
}
public LifetimePolicy setLifetimePolicy(final LifetimePolicy expected, final LifetimePolicy desired)
throws IllegalStateException, AccessControlException, IllegalArgumentException
{
return null; //TODO
}
public long getTimeToLive()
{
return 0; //TODO
}
public long setTimeToLive(final long expected, final long desired)
throws IllegalStateException, AccessControlException, IllegalArgumentException
{
return 0; //TODO
}
public Statistics getStatistics()
{
return _statistics;
}
@Override
public <C extends ConfiguredObject> Collection<C> getChildren(Class<C> clazz)
{
if(clazz == org.apache.qpid.server.model.Binding.class)
{
return (Collection<C>) getBindings();
}
else
{
return Collections.emptySet();
}
}
@Override
public <C extends ConfiguredObject> C createChild(Class<C> childClass, Map<String, Object> attributes, ConfiguredObject... otherParents)
{
if(childClass == org.apache.qpid.server.model.Binding.class)
{
if(otherParents != null && otherParents.length == 1 && otherParents[0] instanceof Queue)
{
Queue queue = (Queue) otherParents[0];
if(queue.getParent(org.apache.qpid.server.model.VirtualHost.class) == getParent(org.apache.qpid.server.model.VirtualHost.class))
{
return (C) createBinding(queue, attributes);
}
else
{
throw new IllegalArgumentException("Queue and Exchange parents of a binding must be on same virtual host");
}
}
else
{
throw new IllegalArgumentException("Other parent must be a queue");
}
}
else
{
throw new IllegalArgumentException();
}
}
public void bindingAdded(org.apache.qpid.server.exchange.Exchange exchange, Binding binding)
{
BindingAdapter adapter = null;
synchronized (_bindingAdapters)
{
if(!_bindingAdapters.containsKey(binding))
{
QueueAdapter queueAdapter = _vhost.getQueueAdapter(binding.getQueue());
adapter = new BindingAdapter(binding, this, queueAdapter);
_bindingAdapters.put(binding,adapter);
queueAdapter.bindingRegistered(binding,adapter);
}
}
if(adapter != null)
{
childAdded(adapter);
}
}
public void bindingRemoved(org.apache.qpid.server.exchange.Exchange exchange, Binding binding)
{
BindingAdapter adapter = null;
synchronized (_bindingAdapters)
{
adapter = _bindingAdapters.remove(binding);
}
if(adapter != null)
{
_vhost.getQueueAdapter(binding.getQueue()).bindingUnregistered(binding);
childRemoved(adapter);
}
}
org.apache.qpid.server.exchange.Exchange getExchange()
{
return _exchange;
}
@Override
public Object getAttribute(String name)
{
if(ID.equals(name))
{
return getId();
}
else if(NAME.equals(name))
{
return getName();
}
else if(STATE.equals(name))
{
return State.ACTIVE;
}
else if(DURABLE.equals(name))
{
return isDurable();
}
else if(LIFETIME_POLICY.equals(name))
{
return _exchange.isAutoDelete() ? LifetimePolicy.AUTO_DELETE : LifetimePolicy.PERMANENT;
}
else if(TIME_TO_LIVE.equals(name))
{
}
else if(CREATED.equals(name))
{
}
else if(UPDATED.equals(name))
{
}
else if(ALTERNATE_EXCHANGE.equals(name))
{
return _exchange.getAlternateExchange();
}
else if(TYPE.equals(name))
{
return _exchange.getType().getName().asString();
}
return super.getAttribute(name);
}
@Override
public Object setAttribute(String name, Object expected, Object desired)
throws IllegalStateException, AccessControlException, IllegalArgumentException
{
return super.setAttribute(name, expected, desired); //TODO - Implement
}
@Override
public Collection<String> getAttributeNames()
{
return AVAILABLE_ATTRIBUTES;
}
@Override
public State setDesiredState(State currentState, State desiredState) throws IllegalStateTransitionException,
AccessControlException
{
if (desiredState == State.DELETED)
{
delete();
return State.DELETED;
}
return super.setDesiredState(currentState, desiredState);
}
private class ExchangeStatistics implements Statistics
{
public Collection<String> getStatisticNames()
{
return AVAILABLE_STATISTICS;
}
public Object getStatistic(String name)
{
if(BINDING_COUNT.equals(name))
{
return _exchange.getBindingCount();
}
else if(BYTES_DROPPED.equals(name))
{
return _exchange.getByteDrops();
}
else if(BYTES_IN.equals(name))
{
return _exchange.getByteReceives();
}
else if(MESSAGES_DROPPED.equals(name))
{
return _exchange.getMsgDrops();
}
else if(MESSAGES_IN.equals(name))
{
return _exchange.getMsgReceives();
}
else if(PRODUCER_COUNT.equals(name))
{
}
else if(STATE_CHANGED.equals(name))
{
}
return null; // TODO - Implement
}
}
}