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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.transport;
import static org.apache.qpid.transport.Connection.State.OPEN;
import static org.apache.qpid.transport.Connection.State.RESUMING;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.security.sasl.SaslClient;
import javax.security.sasl.SaslException;
import org.apache.qpid.transport.util.Logger;
/**
* ClientDelegate
*
*/
public class ClientDelegate extends ConnectionDelegate
{
private static final Logger log = Logger.get(ClientDelegate.class);
protected final ConnectionSettings _conSettings;
public ClientDelegate(ConnectionSettings settings)
{
this._conSettings = settings;
}
public void init(Connection conn, ProtocolHeader hdr)
{
if (!(hdr.getMajor() == 0 && hdr.getMinor() == 10))
{
conn.exception(new ProtocolVersionException(hdr.getMajor(), hdr.getMinor()));
}
}
@Override
public void connectionStart(Connection conn, ConnectionStart start)
{
Map<String,Object> clientProperties = new HashMap<String,Object>();
if(this._conSettings.getClientProperties() != null)
{
clientProperties.putAll(_conSettings.getClientProperties());
}
clientProperties.put("qpid.session_flow", 1);
clientProperties.put("qpid.client_pid",getPID());
clientProperties.put("qpid.client_process",
System.getProperty("qpid.client_process","Qpid Java Client"));
List<Object> brokerMechs = start.getMechanisms();
if (brokerMechs == null || brokerMechs.isEmpty())
{
conn.connectionStartOk
(clientProperties, null, null, conn.getLocale());
return;
}
conn.setServerProperties(start.getServerProperties());
try
{
final SaslClient sc = createSaslClient(brokerMechs);
conn.setSaslClient(sc);
byte[] response = sc.hasInitialResponse() ?
sc.evaluateChallenge(new byte[0]) : null;
conn.connectionStartOk
(clientProperties, sc.getMechanismName(), response,
conn.getLocale());
}
catch (ConnectionException ce)
{
conn.exception(ce);
}
catch (SaslException e)
{
conn.exception(e);
}
}
protected SaslClient createSaslClient(List<Object> brokerMechs) throws ConnectionException, SaslException
{
throw new UnsupportedOperationException();
}
@Override
public void connectionSecure(Connection conn, ConnectionSecure secure)
{
SaslClient sc = conn.getSaslClient();
try
{
byte[] response = sc.evaluateChallenge(secure.getChallenge());
conn.connectionSecureOk(response);
}
catch (SaslException e)
{
conn.exception(e);
}
}
@Override
public void connectionTune(Connection conn, ConnectionTune tune)
{
int hb_interval = calculateHeartbeatInterval(_conSettings.getHeartbeatInterval(),
tune.getHeartbeatMin(),
tune.getHeartbeatMax()
);
conn.connectionTuneOk(tune.getChannelMax(),
tune.getMaxFrameSize(),
hb_interval);
// The idle timeout is twice the heartbeat amount (in milisecs)
conn.setIdleTimeout(hb_interval*1000*2);
int channelMax = tune.getChannelMax();
//0 means no implied limit, except available server resources
//(or that forced by protocol limitations [0xFFFF])
conn.setChannelMax(channelMax == 0 ? Connection.MAX_CHANNEL_MAX : channelMax);
conn.connectionOpen(_conSettings.getVhost(), null, Option.INSIST);
}
@Override
public void connectionOpenOk(Connection conn, ConnectionOpenOk ok)
{
if (conn.isConnectionResuming())
{
conn.setState(RESUMING);
}
else
{
conn.setState(OPEN);
}
}
@Override
public void connectionRedirect(Connection conn, ConnectionRedirect redir)
{
throw new UnsupportedOperationException();
}
@Override
public void connectionHeartbeat(Connection conn, ConnectionHeartbeat hearbeat)
{
conn.connectionHeartbeat();
}
/**
* Currently the spec specified the min and max for heartbeat using secs
*/
private int calculateHeartbeatInterval(int heartbeat,int min, int max)
{
int i = heartbeat;
if (i == 0)
{
log.info("Idle timeout is 0 sec. Heartbeats are disabled.");
return 0; // heartbeats are disabled.
}
else if (i >= min && i <= max)
{
return i;
}
else
{
log.info("The broker does not support the configured connection idle timeout of %s sec," +
" using the brokers max supported value of %s sec instead.", i,max);
return max;
}
}
private int getPID()
{
RuntimeMXBean rtb = ManagementFactory.getRuntimeMXBean();
String processName = rtb.getName();
if (processName != null && processName.indexOf('@')>0)
{
try
{
return Integer.parseInt(processName.substring(0,processName.indexOf('@')));
}
catch(Exception e)
{
log.warn("Unable to get the client PID due to error",e);
return -1;
}
}
else
{
log.warn("Unable to get the client PID due to unsupported format : " + processName);
return -1;
}
}
}
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