| /** |
| * 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 java.net.ConnectException; |
| import org.apache.storm.generated.HBMessage; |
| import org.apache.storm.messaging.netty.ControlMessage; |
| import org.apache.storm.shade.io.netty.channel.Channel; |
| import org.apache.storm.shade.io.netty.channel.ChannelHandlerContext; |
| import org.apache.storm.shade.io.netty.channel.ChannelInboundHandlerAdapter; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class PacemakerClientHandler extends ChannelInboundHandlerAdapter { |
| private static final Logger LOG = LoggerFactory.getLogger(PacemakerClientHandler.class); |
| |
| private final PacemakerClient client; |
| |
| public PacemakerClientHandler(PacemakerClient client) { |
| this.client = client; |
| } |
| |
| @Override |
| public void channelActive(ChannelHandlerContext ctx) { |
| // register the newly established channel |
| Channel channel = ctx.channel(); |
| LOG.info("Connection established from {} to {}", |
| channel.localAddress(), channel.remoteAddress()); |
| } |
| |
| @Override |
| public void channelRead(ChannelHandlerContext ctx, Object message) { |
| LOG.debug("Got Message: {}", message.toString()); |
| |
| if (message instanceof ControlMessage) { |
| LOG.debug("Got control message: {}", message.toString()); |
| return; |
| } else if (message instanceof HBMessage) { |
| client.gotMessage((HBMessage) message); |
| } else { |
| LOG.warn("Got unexpected message: {} from server.", message); |
| } |
| } |
| |
| @Override |
| public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { |
| if (cause instanceof ConnectException) { |
| LOG.warn("Connection to pacemaker failed. Trying to reconnect {}", cause.getMessage()); |
| } else { |
| LOG.error("Exception occurred in Pacemaker.", cause); |
| } |
| client.reconnect(); |
| } |
| } |