namesrv

package com.alibaba.rocketmq.namesrv;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.alibaba.rocketmq.common.MixAll;
import com.alibaba.rocketmq.common.constant.LoggerName;
import com.alibaba.rocketmq.common.namesrv.NamesrvConfig;
import com.alibaba.rocketmq.namesrv.kvconfig.KVConfigManager;
import com.alibaba.rocketmq.namesrv.processor.DefaultRequestProcessor;
import com.alibaba.rocketmq.namesrv.routeinfo.RouteInfoManager;
import com.alibaba.rocketmq.remoting.RemotingServer;
import com.alibaba.rocketmq.remoting.netty.NettyRemotingServer;
import com.alibaba.rocketmq.remoting.netty.NettyServerConfig;


/**
 * Name Server服务控制
 * 
 * @author shijia.wxr<vintage.wang@gmail.com>
 * @since 2013-7-5
 */
public class NamesrvController {
    private static final Logger log = LoggerFactory.getLogger(LoggerName.NamesrvLoggerName);
    // Name Server配置
    private final NamesrvConfig namesrvConfig;
    // 通信层配置
    private final NettyServerConfig nettyServerConfig;
    // 服务端通信层对象
    private RemotingServer remotingServer;
    // 服务端网络请求处理线程池
    private ExecutorService remotingExecutor;

    // 定时线程
    private final ScheduledExecutorService scheduledExecutorService = Executors
        .newSingleThreadScheduledExecutor(new ThreadFactory() {
            @Override
            public Thread newThread(Runnable r) {
                return new Thread(r, "NamesrvControllerScheduledThread");
            }
        });

    /**
     * 核心数据结构
     */
    private final KVConfigManager kvConfigManager;
    private final RouteInfoManager routeInfoManager;


    public NamesrvController(NamesrvConfig namesrvConfig, NettyServerConfig nettyServerConfig) {
        this.namesrvConfig = namesrvConfig;
        this.nettyServerConfig = nettyServerConfig;
        this.kvConfigManager = new KVConfigManager(this);
        this.routeInfoManager = new RouteInfoManager();
    }


    public boolean initialize() {
        // 打印服务器配置参数
        MixAll.printObjectProperties(log, this.namesrvConfig);

        // 加载KV配置
        this.kvConfigManager.load();

        // 初始化通信层
        this.remotingServer = new NettyRemotingServer(this.nettyServerConfig);

        // 初始化线程池
        this.remotingExecutor =
                Executors.newFixedThreadPool(nettyServerConfig.getServerWorkerThreads(), new ThreadFactory() {
                    private AtomicInteger threadIndex = new AtomicInteger(0);


                    @Override
                    public Thread newThread(Runnable r) {
                        return new Thread(r, "RemotingExecutorThread_" + threadIndex.incrementAndGet());
                    }
                });

        this.registerProcessor();

        // 增加定时任务
        this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {

            @Override
            public void run() {
                NamesrvController.this.routeInfoManager.scanNotActiveBroker();
            }
        }, 1000 * 5, 1000 * 10, TimeUnit.MILLISECONDS);

        this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {

            @Override
            public void run() {
                NamesrvController.this.kvConfigManager.printAllPeriodically();
            }
        }, 1000 * 10, 1000 * 120, TimeUnit.MILLISECONDS);

        this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {

            @Override
            public void run() {
                NamesrvController.this.routeInfoManager.printAllPeriodically();
            }
        }, 1000 * 10, 1000 * 120, TimeUnit.MILLISECONDS);

        return true;
    }


    private void registerProcessor() {
        this.remotingServer
            .registerDefaultProcessor(new DefaultRequestProcessor(this), this.remotingExecutor);
    }


    public void start() throws Exception {
        this.remotingServer.start();
    }


    public void shutdown() {
        this.remotingServer.shutdown();
        this.remotingExecutor.shutdown();
        this.scheduledExecutorService.shutdown();
    }


    public NamesrvConfig getNamesrvConfig() {
        return namesrvConfig;
    }


    public NettyServerConfig getNettyServerConfig() {
        return nettyServerConfig;
    }


    public KVConfigManager getKvConfigManager() {
        return kvConfigManager;
    }


    public RouteInfoManager getRouteInfoManager() {
        return routeInfoManager;
    }
}

<pre name="code" class="java">/**
 * $Id: NamesrvStartup.java 1839 2013-05-16 02:12:02Z shijia.wxr $
 */
package com.alibaba.rocketmq.namesrv;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.PosixParser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.joran.JoranConfigurator;

import com.alibaba.rocketmq.common.MixAll;
import com.alibaba.rocketmq.common.constant.LoggerName;
import com.alibaba.rocketmq.common.namesrv.NamesrvConfig;
import com.alibaba.rocketmq.remoting.netty.NettyServerConfig;


/**
 * Name server 启动入口
 * 
 * @author shijia.wxr<vintage.wang@gmail.com>
 * @since 2013-7-5
 */
public class NamesrvStartup {

    public static Options buildCommandlineOptions(final Options options) {
        Option opt = new Option("c", "configFile", true, "Name server config properties file");
        opt.setRequired(false);
        options.addOption(opt);

        opt = new Option("p", "printConfigItem", false, "Print all config item");
        opt.setRequired(false);
        options.addOption(opt);

        return options;
    }


    public static void main(String[] args) {
        try {
            // 解析命令行
            Options options = MixAll.buildCommandlineOptions(new Options());
            final CommandLine commandLine =
                    MixAll.parseCmdLine("mqnamesrv", args, buildCommandlineOptions(options),
                        new PosixParser());
            if (null == commandLine) {
                System.exit(-1);
                return;
            }

            // 初始化配置文件
            final NamesrvConfig namesrvConfig = new NamesrvConfig();
            final NettyServerConfig nettyServerConfig = new NettyServerConfig();
            nettyServerConfig.setListenPort(9876);
            if (commandLine.hasOption('c')) {
                String file = commandLine.getOptionValue('c');
                if (file != null) {
                    InputStream in = new BufferedInputStream(new FileInputStream(file));
                    Properties properties = new Properties();
                    properties.load(in);
                    MixAll.properties2Object(properties, namesrvConfig);
                    MixAll.properties2Object(properties, nettyServerConfig);
                    System.out.println("load config properties file OK, " + file);
                    in.close();
                }
            }

            // 打印默认配置
            if (commandLine.hasOption('p')) {
                MixAll.printObjectProperties(null, namesrvConfig);
                MixAll.printObjectProperties(null, nettyServerConfig);
                System.exit(0);
            }

            MixAll.properties2Object(MixAll.commandLine2Properties(commandLine), namesrvConfig);

            if (null == namesrvConfig.getRocketmqHome()) {
                System.out.println("Please set the " + MixAll.ROCKETMQ_HOME_ENV
                        + " variable in your environment to match the location of the RocketMQ installation");
                System.exit(-2);
            }

            // 初始化Logback
            LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
            JoranConfigurator configurator = new JoranConfigurator();
            configurator.setContext(lc);
            lc.reset();
            configurator.doConfigure(namesrvConfig.getRocketmqHome() + "/conf/log4j_namesrv.xml");
            final Logger log = LoggerFactory.getLogger(LoggerName.NamesrvLoggerName);

            // 初始化服务控制对象
            final NamesrvController controller = new NamesrvController(namesrvConfig, nettyServerConfig);
            boolean initResult = controller.initialize();
            if (!initResult) {
                controller.shutdown();
                System.exit(-3);
            }

            Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
                private volatile boolean hasShutdown = false;
                private AtomicInteger shutdownTimes = new AtomicInteger(0);


                @Override
                public void run() {
                    synchronized (this) {
                        log.info("shutdown hook was invoked, " + this.shutdownTimes.incrementAndGet());
                        if (!this.hasShutdown) {
                            this.hasShutdown = true;
                            long begineTime = System.currentTimeMillis();
                            controller.shutdown();
                            long consumingTimeTotal = System.currentTimeMillis() - begineTime;
                            log.info("shutdown hook over, consuming time total(ms): " + consumingTimeTotal);
                        }
                    }
                }
            }, "ShutdownHook"));

            // 启动服务
            controller.start();

            String tip = "The Name Server boot success.";
            log.info(tip);
            System.out.println(tip);
        }
        catch (Throwable e) {
            e.printStackTrace();
            System.exit(-1);
        }
    }
}