WebLogic Cluster

From Documentation


Before You Start

You have to configure the following setting for ZK and Weblogic.

zk.xml

<zk>
	<system-config>
		<ui-factory-class>org.zkoss.zk.ui.http.SerializableUiFactory</ui-factory-class>
	</system-config>
	<!-- clustering environment, since ZK 5.0.8-->
	<listener>
		<listener-class>org.zkoss.zkplus.cluster.ClusterSessionPatch</listener-class>
	</listener>
</zk>

weblogic.xml

  • Add a weblogic.xml under XXX/WEB-INF folder(XXX is like ZKsandbox in the war file)

For example,

<!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>
  <session-descriptor>
    <session-param>
      <param-name>PersistentStoreType</param-name>
      <param-value>replicated</param-value>
    </session-param>
  </session-descriptor>
</weblogic-web-app>

For Weblogic version 12c

<?xml version="1.0" encoding="UTF-8"?>
<wls:weblogic-web-app
	xmlns:wls="http://xmlns.oracle.com/weblogic/weblogic-web-app"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd http://xmlns.oracle.com/weblogic/weblogic-web-app http://xmlns.oracle.com/weblogic/weblogic-web-app/1.5/weblogic-web-app.xsd">
	<wls:session-descriptor>
		<wls:persistent-store-type>replicated</wls:persistent-store-type>
	</wls:session-descriptor>
</wls:weblogic-web-app>

As mentioned in Weblogic's document

replicated — Same as memory, but session data is replicated across the clustered servers.

Setting up Weblogic Clusters

After those things done above, please follow the official document to set up a Weblogic Cluster Server here.

Including zul in JSP in Weblogic

Weblogic JSP writer implementation uses response#getOutputStream for JSP blocks.

Using the

<jsp:include src="foo/bar/mypage.zul">

tag in weblogic will cause the ZK layout servlet to write the zul file to response#getWriter.

This will cause an error "Cannot call outputStream because getWriter was already called"

Instead, use

<%@ taglib uri = "http://java.sun.com/jsp/jstl/core" prefix = "c" %>
<c:import var = "data" url = "foo/bar/mypage.zul"/><c:import>​

Version History

Last Update : 2022/05/10


Version Date Content
5.0.8 June 2011 Add ClusterSessionPatch listener to zk.xml for enforce Weblogic to write session.



Last Update : 2022/05/10

Copyright © Potix Corporation. This article is licensed under GNU Free Documentation License.