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如何在集群中获得处理本次请求的web容器的端口号?

系统四台机器,每台机器部署四个Tomcat Web容器。现需要根据端口号随机切换到映射的数据源,若一台机器一个Tomcat则用IP识别,可现在一台机器四个Tomcat,因此还需要获得Web容器的端口号。
那么:在Web服务器集群中,一个Spring任务该如何获取Web容器的端口号呢?
设置需要的Key,本系统使用Tomcat Web服务器,操作如下。
编辑文件${tomact-dir}/bin/catalina.bat,添加以下内容即可:

set JAVA_OPTS=-D<key>="<value>",如:set JAVA_OPTS=-Dreyo.localPort="3400"

然后在程序System.getProperty("reyo.localPort")即可获取处理该次请求的Tomcat端口号。

 1 import java.net.InetAddress;
 2 import java.net.UnknownHostException;
 3 
 4 public class SystemProperties {
 5 
 6     public static InetAddress getInetAddress() {
 7         try {
 8             return InetAddress.getLocalHost();
 9         } catch (UnknownHostException e) {
10             System.out.println("unknown host!");
11         }
12         return null;
13     }
14 
15     public static String getHostIp(InetAddress netAddress) {
16         if (null == netAddress) {
17             return null;
18         }
19         String ip = netAddress.getHostAddress(); // get the ip address
20         return ip;
21     }
22 
23     public static String getHostName(InetAddress netAddress) {
24         if (null == netAddress) {
25             return null;
26         }
27         String name = netAddress.getHostName(); // get the host address
28         return name;
29     }
30     
31     public static String getPort(){
32         return System.getProperty("reyo.localPort");
33     }
34 
35     public static void main(String[] args) {
36         InetAddress netAddress = getInetAddress();
37         System.out.println("host ip:" + getHostIp(netAddress));
38         System.out.println("host name:" + getHostName(netAddress));
39         System.out.println("port:" + getPort());
40         try {
41             InetAddress netAddressa = InetAddress.getLocalHost();
42             String hostAddress = netAddressa.getHostAddress();
43             System.out.println(hostAddress);
44         } catch (UnknownHostException e) {
45             logger.error("位置主机!!!", e);
46         }
47     }
48 
49 }

参考资料:

集群: 如何在spring 任务中 获得集群中的一个web 容器的端口号?

Done

posted @ 2016-12-25 16:32  dai.sp  阅读(382)  评论(0编辑  收藏  举报