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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.disttest.client;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import javax.naming.NamingException;
import org.apache.commons.lang.builder.ToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;
import org.apache.qpid.disttest.DistributedTestException;
import org.apache.qpid.disttest.Visitor;
import org.apache.qpid.disttest.jms.ClientJmsDelegate;
import org.apache.qpid.disttest.message.Command;
import org.apache.qpid.disttest.message.ParticipantResult;
import org.apache.qpid.disttest.message.Response;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Client
{
private static final Logger LOGGER = LoggerFactory.getLogger(Client.class);
private final ClientJmsDelegate _clientJmsDelegate;
private final CountDownLatch _latch = new CountDownLatch(1);
private Visitor _visitor;
private final AtomicReference<ClientState> _state;
private ParticipantExecutorRegistry _participantRegistry = new ParticipantExecutorRegistry();
public Client(final ClientJmsDelegate delegate) throws NamingException
{
_clientJmsDelegate = delegate;
_state = new AtomicReference<ClientState>(ClientState.CREATED);
_visitor = new ClientCommandVisitor(this, _clientJmsDelegate);
}
/**
* Register with the controller
*/
public void start()
{
_clientJmsDelegate.setInstructionListener(this);
_clientJmsDelegate.sendRegistrationMessage();
_state.set(ClientState.READY);
}
public void stop()
{
_state.set(ClientState.STOPPED);
_latch.countDown();
}
public void addParticipantExecutor(final ParticipantExecutor participant)
{
_participantRegistry.add(participant);
}
public void waitUntilStopped()
{
waitUntilStopped(0);
}
public void waitUntilStopped(final long timeout)
{
try
{
if (timeout == 0)
{
_latch.await();
}
else
{
_latch.await(timeout, TimeUnit.MILLISECONDS);
}
}
catch (final InterruptedException ie)
{
Thread.currentThread().interrupt();
}
_clientJmsDelegate.destroy();
}
public void processInstruction(final Command command)
{
if (LOGGER.isInfoEnabled())
{
LOGGER.info("Client " + getClientName() + " received command: " + command);
}
String responseMessage = null;
try
{
command.accept(_visitor);
}
catch (final Exception e)
{
LOGGER.error("Error processing instruction", e);
responseMessage = e.getMessage();
}
finally
{
_clientJmsDelegate.sendResponseMessage(new Response(_clientJmsDelegate.getClientName(), command.getType(), responseMessage));
}
}
public ClientState getState()
{
return _state.get();
}
public String getClientName()
{
return _clientJmsDelegate.getClientName();
}
public void setClientCommandVisitor(final ClientCommandVisitor visitor)
{
_visitor = visitor;
}
public void startTest()
{
if (_state.compareAndSet(ClientState.READY, ClientState.RUNNING_TEST))
{
try
{
_clientJmsDelegate.startConnections();
for (final ParticipantExecutor executor : _participantRegistry.executors())
{
executor.start(this);
}
}
catch (final Exception e)
{
try
{
tearDownTest();
}
catch (final Exception e2)
{
// ignore
}
throw new DistributedTestException("Error starting test: " + _clientJmsDelegate.getClientName(), e);
}
}
else
{
throw new DistributedTestException("Client '" + _clientJmsDelegate.getClientName()
+ "' is not in READY state:" + _state.get());
}
}
public void tearDownTest()
{
if (_state.compareAndSet(ClientState.RUNNING_TEST, ClientState.READY))
{
LOGGER.info("Tearing down test on client: " + _clientJmsDelegate.getClientName());
_clientJmsDelegate.closeTestConnections();
}
else
{
throw new DistributedTestException("Client '" + _clientJmsDelegate.getClientName() + "' is not in RUNNING_TEST state! Ignoring tearDownTest");
}
_participantRegistry.clear();
}
public void sendResults(ParticipantResult testResult)
{
_clientJmsDelegate.sendResponseMessage(testResult);
LOGGER.info("Sent test results " + testResult);
}
@Override
public String toString()
{
return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE)
.append("clientJmsDelegate", _clientJmsDelegate).toString();
}
void setParticipantRegistry(ParticipantExecutorRegistry participantRegistry)
{
_participantRegistry = participantRegistry;
}
}
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