| /** |
| * 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.storm.pacemaker; |
| |
| import org.jboss.netty.channel.SimpleChannelUpstreamHandler; |
| import org.jboss.netty.channel.ChannelHandlerContext; |
| import org.jboss.netty.channel.ChannelStateEvent; |
| import org.jboss.netty.channel.ExceptionEvent; |
| import org.jboss.netty.channel.MessageEvent; |
| import org.jboss.netty.channel.Channel; |
| import org.apache.storm.generated.HBMessage; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.storm.messaging.netty.ControlMessage; |
| |
| public class PacemakerClientHandler extends SimpleChannelUpstreamHandler { |
| private static final Logger LOG = LoggerFactory.getLogger(PacemakerClientHandler.class); |
| |
| private PacemakerClient client; |
| |
| |
| |
| public PacemakerClientHandler(PacemakerClient client) { |
| this.client = client; |
| } |
| |
| @Override |
| public void channelConnected(ChannelHandlerContext ctx, |
| ChannelStateEvent event) { |
| // register the newly established channel |
| Channel channel = ctx.getChannel(); |
| client.channelConnected(channel); |
| |
| LOG.info("Connection established from {} to {}", |
| channel.getLocalAddress(), channel.getRemoteAddress()); |
| } |
| |
| @Override |
| public void messageReceived(ChannelHandlerContext ctx, MessageEvent event) { |
| LOG.debug("Got Message: {}", event.getMessage().toString()); |
| Object evm = event.getMessage(); |
| |
| if(evm instanceof ControlMessage) { |
| LOG.debug("Got control message: {}", evm.toString()); |
| return; |
| } |
| else if(evm instanceof HBMessage) { |
| client.gotMessage((HBMessage)evm); |
| } |
| else { |
| LOG.warn("Got unexpected message: {} from server.", evm); |
| } |
| } |
| |
| @Override |
| public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent event) { |
| LOG.error("Connection to pacemaker failed", event.getCause()); |
| client.reconnect(); |
| } |
| } |