J2EE集群开发部署实战

书写规则是：
Managed server使用相同端口号，“t3://acme1,acme2,acme3:7001”

Managed server使用不同端口号，“t3://node1:7001,node2:7002,node3:7003”

Weblogic Proxy

Web集群使用JNDI连接EJB集群时Web级集群负载均衡器，可以使用硬件（如交换机），
专门的负载均衡器（如aparche的负载均衡器），我们使用weblogic的软件均衡器，
该均衡器除了负载均衡外，还有失效处理机制。

Weblogic.xml

<!DOCTYPE weblogic-web-app PUBLIC "-//BEA Systems, Inc.//
DTD Web Application 8.1//EN" "http://www.bea.com/servers/wls810/dtd/
weblogic810-web-jar.dtd">

<weblogic-web-app> 

  <context-root>/</context-root>

</weblogic-web-app>

Web.xml

!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//
DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"> 

<web-app>

        <servlet>

                <servlet-name>HttpClusterServlet</servlet-name>

                <servlet-class>

                        weblogic.servlet.proxy.HttpClusterServlet

                </servlet-class>

                <init-param>

                        <param-name>WebLogicCluster</param-name>

                        <param-value>

                                10.10.21.13:8001|10.10.21.14:8001

                        </param-value>

                </init-param>

                <init-param>

                        <param-name>DebugConfigInfo</param-name>

                        <param-value>ON</param-value>

                </init-param>

                <init-param>

                        <param-name>verbose</param-name> 

                        <param-value>true</param-value> 

                </init-param>

        </servlet>

        <servlet-mapping>

                <servlet-name>HttpClusterServlet</servlet-name>

                <url-pattern>/</url-pattern>

        </servlet-mapping>

        <servlet-mapping>

                <servlet-name>HttpClusterServlet</servlet-name>

                <url-pattern>*.jsp</url-pattern>

        </servlet-mapping>

        <servlet-mapping>

                <servlet-name>HttpClusterServlet</servlet-name>

                <url-pattern>*.htm</url-pattern>

        </servlet-mapping>

        <servlet-mapping>

                <servlet-name>HttpClusterServlet</servlet-name>

                <url-pattern>*.html</url-pattern>

        </servlet-mapping>

</web-app>

其中“10.10.21.13:8001|10.10.21.14:8001”表示用作web集群中的机器地址及端口，用竖线分开。