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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.messaging.util;
import java.util.ArrayList;
import java.util.List;
import org.apache.qpid.messaging.Connection;
import org.apache.qpid.messaging.ConnectionException;
import org.apache.qpid.messaging.Message;
import org.apache.qpid.messaging.MessagingException;
import org.apache.qpid.messaging.Receiver;
import org.apache.qpid.messaging.Sender;
import org.apache.qpid.messaging.SessionException;
import org.apache.qpid.messaging.TransportFailureException;
import org.apache.qpid.messaging.internal.ConnectionInternal;
import org.apache.qpid.messaging.internal.ReceiverInternal;
import org.apache.qpid.messaging.internal.SenderInternal;
import org.apache.qpid.messaging.internal.SessionInternal;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class AbstractSessionDecorator implements SessionInternal
{
protected final Logger _logger = LoggerFactory.getLogger(getClass());
protected ConnectionInternal _conn;
protected SessionInternal _delegate;
protected List<ReceiverInternal> _receivers = new ArrayList<ReceiverInternal>();
protected List<SenderInternal> _senders = new ArrayList<SenderInternal>();
protected final Object _connectionLock; // global per connection lock
public AbstractSessionDecorator(ConnectionInternal conn, SessionInternal delegate)
{
_conn = conn;
_delegate = delegate;
_connectionLock = conn.getConnectionLock();
}
@Override
public void close() throws MessagingException
{
synchronized(_connectionLock)
{
Sender[] senders = new Sender[_senders.size()];
senders = _senders.toArray(senders);
for (Sender sender: senders)
{
try
{
sender.close();
}
catch (Exception e)
{
_logger.warn("Error closing sender", e);
}
}
_senders.clear();
Receiver[] receivers = new Receiver[_receivers.size()];
receivers = _receivers.toArray(receivers);
for (Receiver receiver: receivers)
{
try
{
receiver.close();
}
catch (Exception e)
{
_logger.warn("Error closing receiver", e);
}
}
_receivers.clear();
_delegate.close();
_conn.unregisterSession(this);
}
}
@Override
public boolean isClosed()
{
return _delegate.isClosed();
}
@Override
public void commit() throws MessagingException
{
checkPreConditions();
_delegate.commit();
}
@Override
public void rollback() throws MessagingException
{
checkPreConditions();
_delegate.rollback();
}
@Override
public void acknowledge(boolean sync) throws MessagingException
{
checkPreConditions();
_delegate.acknowledge(sync);
}
@Override
public void acknowledge(Message message, boolean sync)
throws MessagingException
{
checkPreConditions();
_delegate.acknowledge(message, sync);
}
@Override
public void reject(Message message) throws MessagingException
{
checkPreConditions();
_delegate.reject(message);
}
@Override
public void release(Message message) throws MessagingException
{
checkPreConditions();
_delegate.release(message);
}
@Override
public void sync(boolean block) throws MessagingException
{
checkPreConditions();
_delegate.sync(block);
}
@Override
public int getReceivable() throws MessagingException
{
checkPreConditions();
return _delegate.getReceivable();
}
@Override
public int getUnsettledAcks() throws MessagingException
{
checkPreConditions();
return _delegate.getUnsettledAcks();
}
@Override
public Receiver nextReceiver(long timeout) throws MessagingException
{
checkPreConditions();
return _delegate.nextReceiver(timeout);
}
@Override
public Connection getConnection() throws MessagingException
{
checkError();
return _conn; // always return your peer (not your delegate's peer)
}
@Override
public boolean hasError()
{
return _delegate.hasError();
}
@Override
public void checkError() throws MessagingException
{
checkPreConditions(); // check if we already have the info.
// Asking the delegate.
_delegate.checkError();
}
@Override
public ConnectionInternal getConnectionInternal()
{
return _conn;
}
@Override
public String getName()
{
return _delegate.getName();
}
@Override
public void unregisterReceiver(ReceiverInternal receiver)
{
_receivers.remove(receiver);
_delegate.unregisterReceiver(receiver);
}
@Override
public void unregisterSender(SenderInternal sender)
{
_senders.remove(sender);
_delegate.unregisterSender(sender);
}
protected abstract void checkPreConditions() throws SessionException;
}
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