import org.apache.hadoop.hbase.rest.RESTServlet; //导入依赖的package包/类
/**
 * Constructor
 * @param context the servlet context
 */
public VersionModel(ServletContext context) {
  restVersion = RESTServlet.VERSION_STRING;
  jvmVersion = System.getProperty("java.vm.vendor") + ' ' +
    System.getProperty("java.version") + '-' +
    System.getProperty("java.vm.version");
  osVersion = System.getProperty("os.name") + ' ' +
    System.getProperty("os.version") + ' ' +
    System.getProperty("os.arch");
  serverVersion = context.getServerInfo();
  jerseyVersion = ServletContainer.class.getPackage()
    .getImplementationVersion();
}
 

import org.apache.hadoop.hbase.rest.RESTServlet; //导入依赖的package包/类
/**
  * Constructor
  * @param context the servlet context
  */
public VersionModel(ServletContext context) {
  restVersion = RESTServlet.VERSION_STRING;
  jvmVersion = System.getProperty("java.vm.vendor") + ' ' +
     System.getProperty("java.version") + '-' +
     System.getProperty("java.vm.version");
  osVersion = System.getProperty("os.name") + ' ' +
     System.getProperty("os.version") + ' ' +
     System.getProperty("os.arch");
  serverVersion = context.getServerInfo();
  jerseyVersion = ServletContainer.class.getPackage()
     .getImplementationVersion();
}
 

import org.apache.hadoop.hbase.rest.RESTServlet; //导入依赖的package包/类
/**
 * Constructor
 * @param context the servlet context
 */
public VersionModel(ServletContext context) {
  restVersion = RESTServlet.VERSION_STRING;
  jvmVersion = System.getProperty("java.vm.vendor") + ' ' +
    System.getProperty("java.version") + '-' +
    System.getProperty("java.vm.version");
  osVersion = System.getProperty("os.name") + ' ' +
    System.getProperty("os.version") + ' ' +
    System.getProperty("os.arch");
  serverVersion = context.getServerInfo();
  jerseyVersion = ServletContainer.class.getPackage().getImplementationVersion();
  // Currently, this will always be null because the manifest doesn't have any useful information
  if (jerseyVersion == null) jerseyVersion = "";
}
 

import org.apache.hadoop.hbase.rest.RESTServlet; //导入依赖的package包/类
@Override
public void start() throws Exception {
    VersionInfo.logVersion();
    Configuration conf = builder.getHbaseConfiguration();

    conf.set("hbase.rest.port", hbaseRestPort.toString());
    conf.set("hbase.rest.readonly", (hbaseRestReadOnly == null) ? "true" : hbaseRestReadOnly.toString());
    conf.set("hbase.rest.info.port", (hbaseRestInfoPort == null) ? "8085" : hbaseRestInfoPort.toString());
    String hbaseRestHost = (this.hbaseRestHost == null) ? "0.0.0.0" : this.hbaseRestHost;

    Integer hbaseRestThreadMax = (this.hbaseRestThreadMax == null) ? 100 : this.hbaseRestThreadMax;
    Integer hbaseRestThreadMin = (this.hbaseRestThreadMin == null) ? 2 : this.hbaseRestThreadMin;

    UserProvider userProvider = UserProvider.instantiate(conf);
    Pair<FilterHolder, Class<? extends ServletContainer>> pair = loginServerPrincipal(userProvider, conf);
    FilterHolder authFilter = pair.getFirst();
    Class<? extends ServletContainer> containerClass = pair.getSecond();
    RESTServlet.getInstance(conf, userProvider);

    // set up the Jersey servlet container for Jetty
    ServletHolder sh = new ServletHolder(containerClass);
    sh.setInitParameter("com.sun.jersey.config.property.resourceConfigClass", ResourceConfig.class.getCanonicalName());
    sh.setInitParameter("com.sun.jersey.config.property.packages", "jetty");
    ServletHolder shPojoMap = new ServletHolder(containerClass);
    Map<String, String> shInitMap = sh.getInitParameters();
    for (Map.Entry<String, String> e : shInitMap.entrySet()) {
        shPojoMap.setInitParameter(e.getKey(), e.getValue());
    }
    shPojoMap.setInitParameter(JSONConfiguration.FEATURE_POJO_MAPPING, "true");

    // set up Jetty and run the embedded server

    server = new Server();

    Connector connector = new SelectChannelConnector();
    if (conf.getBoolean(RESTServer.REST_SSL_ENABLED, false)) {
        SslSelectChannelConnector sslConnector = new SslSelectChannelConnector();
        String keystore = conf.get(RESTServer.REST_SSL_KEYSTORE_STORE);
        String password = HBaseConfiguration.getPassword(conf, RESTServer.REST_SSL_KEYSTORE_PASSWORD, null);
        String keyPassword = HBaseConfiguration.getPassword(conf, RESTServer.REST_SSL_KEYSTORE_KEYPASSWORD, password);
        sslConnector.setKeystore(keystore);
        sslConnector.setPassword(password);
        sslConnector.setKeyPassword(keyPassword);
        connector = sslConnector;
    }
    connector.setPort(hbaseRestPort);
    connector.setHost(hbaseRestHost);
    connector.setHeaderBufferSize(8192);


    server.addConnector(connector);

    QueuedThreadPool threadPool = new QueuedThreadPool(hbaseRestThreadMax);
    threadPool.setMinThreads(hbaseRestThreadMin);
    server.setThreadPool(threadPool);

    server.setSendServerVersion(false);
    server.setSendDateHeader(false);
    server.setStopAtShutdown(true);
    // set up context
    Context context = new Context(server, "/", Context.SESSIONS);
    context.addServlet(shPojoMap, "/status/cluster");
    context.addServlet(sh, "/*");
    if (authFilter != null) {
        context.addFilter(authFilter, "/*", 1);
    }

    HttpServerUtil.constrainHttpMethods(context);

    // Put up info server.
    int port = (hbaseRestInfoPort == null) ? 8085 : hbaseRestInfoPort;
    if (port >= 0) {
        conf.setLong("startcode", System.currentTimeMillis());
        String a = hbaseRestHost;
        infoServer = new InfoServer("rest", a, port, false, conf);
        infoServer.setAttribute("hbase.conf", conf);
        infoServer.start();
    }
    // start server
    server.start();
}