package org.apache.helix.manager.zk;
/*
* 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.
*/
import org.apache.helix.HelixException;
import org.apache.helix.NotificationContext;
import org.apache.helix.messaging.handling.HelixTaskResult;
import org.apache.helix.messaging.handling.MessageHandler;
import org.apache.helix.messaging.handling.MessageHandlerFactory;
import org.apache.helix.model.Message;
import org.apache.helix.model.Message.MessageType;
import org.apache.log4j.Logger;
public class DefaultControllerMessageHandlerFactory implements
MessageHandlerFactory
{
private static Logger _logger = Logger.getLogger(DefaultControllerMessageHandlerFactory.class);
@Override
public MessageHandler createHandler(Message message,
NotificationContext context)
{
String type = message.getMsgType();
if(!type.equals(getMessageType()))
{
throw new HelixException("Unexpected msg type for message "+message.getMsgId()
+" type:" + message.getMsgType());
}
return new DefaultControllerMessageHandler(message, context);
}
@Override
public String getMessageType()
{
return MessageType.CONTROLLER_MSG.toString();
}
@Override
public void reset()
{
}
public static class DefaultControllerMessageHandler extends MessageHandler
{
public DefaultControllerMessageHandler(Message message,
NotificationContext context)
{
super(message, context);
}
@Override
public HelixTaskResult handleMessage() throws InterruptedException
{
String type = _message.getMsgType();
HelixTaskResult result = new HelixTaskResult();
if(!type.equals(MessageType.CONTROLLER_MSG.toString()))
{
throw new HelixException("Unexpected msg type for message "+_message.getMsgId()
+" type:" + _message.getMsgType());
}
result.getTaskResultMap().put("ControllerResult", "msg "+ _message.getMsgId() + " from "+_message.getMsgSrc() + " processed");
result.setSuccess(true);
return result;
}
@Override
public void onError(Exception e, ErrorCode code, ErrorType type)
{
_logger.error("Message handling pipeline get an exception. MsgId:" + _message.getMsgId(), e);
}
}
}