In this article we will discuss how can we load jars residing over NFS in JBoss AS-7 classpath. In some development environment, when there are multiple jars and properties files are being used by multiple servers, it is good to put all of them in a central repository, so that if the files (jar/properties files/xmls) are modified, all the servers will pickup the latest version and there will be less overhead related to copying the latest versions to individual servers

NFS allows a user on a client computer to access files over a network in a manner similar to how local storage is accessed. I installed NFS using below link :

Remote_Disk_Access_with_NFS#Installing_NFS

As JBoss AS-7 has introduced a module structure to load your custom jars. One can quickly create a custom module and put the required jars in them, with appropriate entries in module.xml . But in this case we would be needing an additional module directory, which would be residing over NFS server and we would map this to our local (client) server.

Step-1: Modify standalone.sh and add a separate module directory. To do this navigate to $JBOSS_HOME/bin and edit the file.

Search for keyword “module” and it should look like below :

..

if [ "x$JBOSS_MODULEPATH" = "x" ]; then

    JBOSS_MODULEPATH="$JBOSS_HOME/modules"

fi

..

Edit the above section of your “standalone.sh” script and then add the “:” separated path of your module directories as following

..

JBOSS_MODULEPATH=/mnt/nfs:$JBOSS_HOME/modules

#if [ "x$JBOSS_MODULEPATH" = "x" ]; then

  #  JBOSS_MODULEPATH="$JBOSS_HOME/modules"

#fi

..

Here /mnt/nfs/ is the directory, where our new module directory would be residing.

Step-2 : On the shared mount create below directory structure :

..

/mnt/nfs/

├── aaa

 　　└── bbb

     　　└── ccc

         　　└── main

             　　├── module.xml

　　　　　　　　 　├── utility_JAR.jar

..

where

module.xml :

..

<?xml version="1.0" encoding="UTF-8"?>

<module xmlns="urn:jboss:module:1.1" name="aaa.bbb.ccc">

   <resources>

       <resource-root path="utility_JAR.jar"/>

   </resources>

</module>

..

Step-3 : Now lets create a simple application which would be using utility_JAR.jar (ClassLoaderTestWAR.war). The war file will have below structure :”

..

ClassLoaderTestWAR.war/

├── index.jsp

├── WEB-INF

　　 ├── jboss-deployment-structure.xml

　　 ├── web.xml

..

Where :

index.jsp :

..

<html>

     <head><title>ClassLoader Demo</title></head>

     <body bgcolor="maroon" text="white">

            <center>

                    <h1>Class Loader Demo..</h1>

<%

       aaa.bbb.TestUtility utility=new aaa.bbb.TestUtility();

       String whichClassLoader=utility.sayWhichClassLoader();

       System.out.println("\n\n\t -----> "+whichClassLoader);

       out.println("<h1>"+whichClassLoader+"</h1>");

%>

      </body>

</html>

..

jboss-deployment-structure.xml :

..

<?xml version="1.0" encoding="UTF-8"?>

<jboss-deployment-structure>

 <deployment>

   <dependencies>

       <module name="aaa.bbb.ccc" />

   </dependencies>

 </deployment>

</jboss-deployment-structure>

..

web.xml :

..

<web-app>

   <welcome-file-list>

       <welcome-file>index.jsp</welcome-file>

   </welcome-file-list>

</web-app>

..

Step-4 : Now deploy the application and start the JBoss AS-7 server.

Step-5 : Access the application using : http://localhost:8080/ClassLoaderTestWAR

You will see something like below :

If the above output comes that means the jar was loaded from our new module directory, which resides over NFS.

原文地址：http://middlewaremagic.com/jboss/?p=2561

How to load jars residing over NFS in JBossAS7 classpath ? --reference的更多相关文章

  1. Linux 下 Error: Could not find or load main class Hello

    在linux下写了一个很easy的Hello world程序,编译执行居然报错:Error: Could not find or load main class Hello 最后发现是CLASSPAT ...

  2. Could not find or load main class Hello

    在 linux 下写了一个非常简单的 Hello World 程序,编译正常,运行报错:Error: Could not find or load main class Hello 这是由于 CLAS ...

  3. spark提交应用的方法(spark-submit)

    参考自:https://spark.apache.org/docs/latest/submitting-applications.html 常见的语法: ./bin/spark-submit \    ...

  4. spark-shell --conf

    spark-shell --conf -h Usage: ./bin/spark-shell [options] Options: --master MASTER_URL spark://host:p ...

  5. SparkSQL使用之Thrift JDBC server

    Thrift JDBC Server描述 Thrift JDBC Server使用的是HIVE0.12的HiveServer2实现.能够使用Spark或者hive0.12版本的beeline脚本与JD ...

  6. SparkSQL使用之Spark SQL CLI

    Spark SQL CLI描述 Spark SQL CLI的引入使得在SparkSQL中通过hive metastore就可以直接对hive进行查询更加方便:当前版本中还不能使用Spark SQL C ...

  7. Spark笔记——技术点汇总

    目录 概况 手工搭建集群 引言 安装Scala 配置文件 启动与测试 应用部署 部署架构 应用程序部署 核心原理 RDD概念 RDD核心组成 RDD依赖关系 DAG图 RDD故障恢复机制 Standa ...

  8. Spark：Spark 编程模型及快速入门

    http://blog.csdn.net/pipisorry/article/details/52366356 Spark编程模型 SparkContext类和SparkConf类 代码中初始化 我们 ...

  9. 用spark-submit启动程序

    来源:http://spark.apache.org/docs/latest/submitting-applications.html 提交程序常用的一些选项 ./bin/spark-submit \ ...

随机推荐

  1. 原生javascript写的侧栏跟随效果

    浏览网站时经常看到有的网站上,当一个页面很长的时候,设定侧栏内容会跟随滚动条滚动,我们把这种效果叫做“侧栏跟随滚动”.这种特效对提高网站浏览量.文章点击率.广告点击量都有一定效果. 侧栏跟随滚动的实现 ...

  2. html embed用法

    (一).基本语法: embed src=url  说明:embed可以用来插入各种多媒体,格式可以是 Midi.Wav.AIFF.AU.MP3等等,      Netscape及新版的IE 都支持.u ...

  3. JQuery jsonp使用小记

    在一个不支持PHP的主机上,需要对某些页面做访问统计.我的方案是在静态的HTML页面上,用JSONP向能够执行PHP的主机进行跨域请求,从而使用PHP解决这个访问量统计问题. 在服务器端,PHP页面返 ...

  4. 在Linux终端执行clear或top命令时出现：'xterm': unknown terminal type

    在Linux终端执行clear或top命令时出现:'xterm': unknown terminal type的错误. 例如: [root@localhost phpmyadmin]# clear ' ...

  5. Why your Games are Unfinished, and What To Do About It (转)

    So, you've got a new game idea, and it's going to change what everyone knows about the genre! Great! ...

  6. 弄懂css中单位px和em,rem的区别

              国内的设计师大都喜欢用px,而国外的网站大都喜欢用em和rem,那么三者有什么区别,又各自有什么优劣呢?         PX特点 1. IE无法调整那些使用px作为单位的字体大小 ...

  7. BZOJ 3570 动物园

    Description 近日,园长发现动物园中好吃懒做的动物越来越多了.例如企鹅,只会卖萌向游客要吃的.为了整治动物园的不良风气,让动物们凭自己的真才实学向游客要吃的,园长决定开设算法班,让动物们学习 ...

  8. BZOJ 1507 Editor

    Description Input 输入文件editor.in的第一行是指令条数t,以下是需要执行的t个操作.其中: 为了使输入文件便于阅读,Insert操作的字符串中可能会插入一些回车符,请忽略掉它 ...

  9. MySql的卸载问题

    windows下mysql的卸载: 彻底卸载Mysql的方法:   (1),先在服务(开始——>控制面板——>管理工具——>服务)里停掉MySQL的服务.打开控制面板-添加删除程序, ...

  10. RR 插入不影响

    | test100 | CREATE TABLE `test100` ( `sn` int(11) NOT NULL AUTO_INCREMENT COMMENT '自增编号', `phoneNo` ...