/**
* 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.cassandra.net;
import java.util.*;
import java.net.InetAddress;
import org.apache.cassandra.locator.ILatencyPublisher;
import org.apache.cassandra.locator.ILatencySubscriber;
import org.apache.log4j.Logger;
public class ResponseVerbHandler implements IVerbHandler, ILatencyPublisher
{
private static final Logger logger_ = Logger.getLogger( ResponseVerbHandler.class );
private List<ILatencySubscriber> subscribers = new ArrayList<ILatencySubscriber>();
public void doVerb(Message message)
{
String messageId = message.getMessageId();
IAsyncCallback cb = MessagingService.getRegisteredCallback(messageId);
double age = 0;
if (cb != null)
{
if (logger_.isDebugEnabled())
logger_.debug("Processing response on a callback from " + message.getMessageId() + "@" + message.getFrom());
age = System.currentTimeMillis() - MessagingService.getRegisteredCallbackAge(messageId);
cb.response(message);
}
else
{
IAsyncResult ar = MessagingService.getAsyncResult(messageId);
if (ar != null)
{
if (logger_.isDebugEnabled())
logger_.debug("Processing response on an async result from " + message.getMessageId() + "@" + message.getFrom());
age = System.currentTimeMillis() - MessagingService.getAsyncResultAge(messageId);
ar.result(message);
}
}
notifySubscribers(message.getFrom(), age);
}
private void notifySubscribers(InetAddress host, double latency)
{
for (ILatencySubscriber subscriber : subscribers)
{
subscriber.receiveTiming(host, latency);
}
}
public void register(ILatencySubscriber subscriber)
{
subscribers.add(subscriber);
}
}