/*
* Copyright 1999-2015 dangdang.com.
* <p>
* Licensed 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.
* </p>
*/
package com.dangdang.ddframe.job.lite.internal.monitor;
import com.dangdang.ddframe.job.lite.internal.config.ConfigurationService;
import com.dangdang.ddframe.job.lite.internal.util.SensitiveInfoUtils;
import com.dangdang.ddframe.job.reg.base.CoordinatorRegistryCenter;
import com.google.common.base.Joiner;
import lombok.extern.slf4j.Slf4j;
import org.apache.curator.framework.recipes.cache.ChildData;
import org.apache.curator.framework.recipes.cache.TreeCache;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;
/**
* 作业监控服务.
*
* @author caohao
*/
@Slf4j
public final class MonitorService {
public static final String DUMP_COMMAND = "dump";
private final String jobName;
private final CoordinatorRegistryCenter regCenter;
private final ConfigurationService configService;
private ServerSocket serverSocket;
private volatile boolean closed;
public MonitorService(final CoordinatorRegistryCenter regCenter, final String jobName) {
this.jobName = jobName;
this.regCenter = regCenter;
configService = new ConfigurationService(regCenter, jobName);
}
/**
* 初始化作业监听服务.
*/
public void listen() {
int port = configService.load(true).getMonitorPort();
if (port < 0) {
return;
}
try {
log.info("Elastic job: Monitor service is running, the port is '{}'", port);
openSocketForMonitor(port);
} catch (final IOException ex) {
log.error("Elastic job: Monitor service listen failure, error is: ", ex);
}
}
private void openSocketForMonitor(final int port) throws IOException {
serverSocket = new ServerSocket(port);
new Thread() {
@Override
public void run() {
while (!closed) {
try {
process(serverSocket.accept());
} catch (final IOException ex) {
log.error("Elastic job: Monitor service open socket for monitor failure, error is: ", ex);
}
}
}
}.start();
}
private void process(final Socket socket) throws IOException {
try (
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
Socket autoCloseSocket = socket) {
String cmdLine = reader.readLine();
if (null != cmdLine && DUMP_COMMAND.equalsIgnoreCase(cmdLine)) {
List<String> result = new ArrayList<>();
dumpDirectly("/" + jobName, result);
outputMessage(writer, Joiner.on("\n").join(SensitiveInfoUtils.filterSensitiveIps(result)) + "\n");
}
}
}
private void dumpDirectly(final String path, final List<String> result) {
for (String each : regCenter.getChildrenKeys(path)) {
String zkPath = path + "/" + each;
String zkValue = regCenter.get(zkPath);
if (null == zkValue) {
zkValue = "";
}
TreeCache treeCache = (TreeCache) regCenter.getRawCache("/" + jobName);
ChildData treeCacheData = treeCache.getCurrentData(zkPath);
String treeCachePath = null == treeCacheData ? "" : treeCacheData.getPath();
String treeCacheValue = null == treeCacheData ? "" : new String(treeCacheData.getData());
if (zkValue.equals(treeCacheValue) && zkPath.equals(treeCachePath)) {
result.add(Joiner.on(" | ").join(zkPath, zkValue));
} else {
result.add(Joiner.on(" | ").join(zkPath, zkValue, treeCachePath, treeCacheValue));
}
dumpDirectly(zkPath, result);
}
}
private void outputMessage(final BufferedWriter outputWriter, final String msg) throws IOException {
outputWriter.append(msg);
outputWriter.flush();
}
/**
* 关闭作业监听服务.
*/
public void close() {
closed = true;
if (null != serverSocket && !serverSocket.isClosed()) {
try {
serverSocket.close();
} catch (final IOException ex) {
log.error("Elastic job: Monitor service close failure, error is: ", ex);
}
}
}
}