| /* |
| * 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 com.alibaba.dubbo.remoting.exchange.support.header; |
| |
| import com.alibaba.dubbo.common.Version; |
| import com.alibaba.dubbo.common.logger.Logger; |
| import com.alibaba.dubbo.common.logger.LoggerFactory; |
| import com.alibaba.dubbo.remoting.Channel; |
| import com.alibaba.dubbo.remoting.Client; |
| import com.alibaba.dubbo.remoting.exchange.Request; |
| |
| import java.util.Collection; |
| |
| final class HeartBeatTask implements Runnable { |
| |
| private static final Logger logger = LoggerFactory.getLogger(HeartBeatTask.class); |
| |
| private ChannelProvider channelProvider; |
| |
| private int heartbeat; |
| |
| private int heartbeatTimeout; |
| |
| HeartBeatTask(ChannelProvider provider, int heartbeat, int heartbeatTimeout) { |
| this.channelProvider = provider; |
| this.heartbeat = heartbeat; |
| this.heartbeatTimeout = heartbeatTimeout; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| long now = System.currentTimeMillis(); |
| for (Channel channel : channelProvider.getChannels()) { |
| if (channel.isClosed()) { |
| continue; |
| } |
| try { |
| Long lastRead = (Long) channel.getAttribute( |
| HeaderExchangeHandler.KEY_READ_TIMESTAMP); |
| Long lastWrite = (Long) channel.getAttribute( |
| HeaderExchangeHandler.KEY_WRITE_TIMESTAMP); |
| if ((lastRead != null && now - lastRead > heartbeat) |
| || (lastWrite != null && now - lastWrite > heartbeat)) { |
| Request req = new Request(); |
| req.setVersion(Version.getProtocolVersion()); |
| req.setTwoWay(true); |
| req.setEvent(Request.HEARTBEAT_EVENT); |
| channel.send(req); |
| if (logger.isDebugEnabled()) { |
| logger.debug("Send heartbeat to remote channel " + channel.getRemoteAddress() |
| + ", cause: The channel has no data-transmission exceeds a heartbeat period: " + heartbeat + "ms"); |
| } |
| } |
| if (lastRead != null && now - lastRead > heartbeatTimeout) { |
| logger.warn("Close channel " + channel |
| + ", because heartbeat read idle time out: " + heartbeatTimeout + "ms"); |
| if (channel instanceof Client) { |
| try { |
| ((Client) channel).reconnect(); |
| } catch (Exception e) { |
| //do nothing |
| } |
| } else { |
| channel.close(); |
| } |
| } |
| } catch (Throwable t) { |
| logger.warn("Exception when heartbeat to remote channel " + channel.getRemoteAddress(), t); |
| } |
| } |
| } catch (Throwable t) { |
| logger.warn("Unhandled exception when heartbeat, cause: " + t.getMessage(), t); |
| } |
| } |
| |
| interface ChannelProvider { |
| Collection<Channel> getChannels(); |
| } |
| |
| } |
| |