手动创建Http服务器（集群Http服务器）

来源：互联网发布：v版4s支持什么网络编辑：程序博客网时间：2024/06/05 02:35

try {
           clusterServer = HttpServer.create(new InetSocketAddress(hostname, port), 1);
       } catch (IOException e) {
           logger.error("Create cluster http server failed:");
           logger.error(e);
           for (StackTraceElement ste : e.getStackTrace()) {
               logger.error(ste.toString());
           }
           System.exit(0);
       }
       clusterServer.createContext("/", new ClusterHttpHandler());

clusterServer.start();

package server;

import java.io.IOException;
import java.util.Iterator;
import java.util.Map.Entry;

import com.cmreadcommon.util.RedisConnectionPool;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;

import common.HttpConstAndEnum;

public class ClusterHttpHandler implements HttpHandler {

   @Override
   public void handle(HttpExchange httpExchange) throws IOException {
       String response = null; // 响应

       /*
       * 解析请求并处理
       */
       String parameters = httpExchange.getRequestURI().getQuery();

       // 解析出参数列表
       String[] split = parameters.split("\\&");

       /*
       * 解析出首个参数的键值，其中该键固定为Operation，即该请求的操作
       * 根据操作行为决定后续参数的解析
       */
       String operation = split[0].split("=")[1];

       switch (operation) {
       case HttpConstAndEnum.CLUSTER_COMMAND_BECOME_MASTER: // 尝试成为Master
           switch (StatisticManagementServer.serverIdentity) {
           case StatisticManagementServer.IDENTITY_NONE:
               response = HttpConstAndEnum.RESULT_YES;
               StatisticManagementServer.serverIdentity = StatisticManagementServer.IDENTITY_SLAVE;
               break;
           case StatisticManagementServer.IDENTITY_MASTER:
               response = HttpConstAndEnum.RESULT_NO;
               break;
           case StatisticManagementServer.IDENTITY_SLAVE:
               response = HttpConstAndEnum.RESULT_YES;
               break;
           }

           break;
       case HttpConstAndEnum.CLUSTER_COMMAND_CHECK_REACHABLE: // 检查可达性
           response = HttpConstAndEnum.RESULT_YES;
           break;
       case HttpConstAndEnum.SERVER_COMMAND_SHUTDOWN: // 关机
           StatisticManagementServer.serverState = StatisticManagementServer.SERVERSTATE_CLOSE;

           try {
               Thread.sleep(5000);
           } catch (InterruptedException e) {
               e.printStackTrace();
           }

           /*
           * 打断所有线程
           */
           StatisticManagementServer.timer.interrupt();
           StatisticManagementServer.identityManager.interrupt();
           StatisticManagementServer.versionListUpdate.interrupt();

           /*
           * 关闭Redis连接池
           */
           Iterator<Entry<String, RedisConnectionPool>> iterator = StatisticManagementServer.connections.entrySet().iterator();
           while (iterator.hasNext()) {
               iterator.next().getValue().shutdown();
           }
           iterator = StatisticManagementServer.kernelConnections.entrySet().iterator();
           while (iterator.hasNext()) {
               iterator.next().getValue().shutdown();
           }

           response = "Server Stoped!";

           break;
       }

       /*
       * 写回响应并断开连接
       */
       // 设置200协议头
       httpExchange.sendResponseHeaders(200, response.getBytes().length);
       // 写入数据
       httpExchange.getResponseBody().write(response.getBytes());

       // 关闭输入输出流
       httpExchange.getRequestBody().close();
       httpExchange.getResponseBody().close();
       httpExchange.close();

       /*
       * 如果是关闭服务器命令，则退出程序（HttpServer.stop方法似乎仍有遗留未关闭线程）
       */
       if (operation.equals(HttpConstAndEnum.SERVER_COMMAND_SHUTDOWN)) {
           System.exit(0);
       }
   }

}

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