Ejb学习之一---EJB3+Jboss4.2配置开发
昨天，打算把Ejb整理下，最早用到Ejb+Jboss是在三年前了。技术的关注度，往往同你所在项目有关。所以，昨天用Ejb也是碰到一个配置问题，搞了我半天。
Point：
Ejb定义
配置
Exception
实例(Sample)
一 Ejb 定义
所谓Ejb，即Enterprise Java bean----企业级的Java bean.但同Java Bean有 区别：
1.Javabean是面向于业务逻辑和表示层的显示。对于简单的服务器端应用而言，是个不错的选择。其只是一个组件。
2.Ejb是部署在服务器上的可执行组件或商业对象。通过Socket允许对其进行远程访问或在特定服务器(eg:Jboss/tomcat/Weblogic/Websphere等)上进行安装或部署。用户不需要关心其底层操作，只需要关心外部实现而已。Ejb是一个容器，是一个组件架构。
二 Configuration(配置):
关于Ejb3+Jboss 4的开发配置，在网上挺多，工作和即将工作的同仁，在google上search一下，就有很多的文章。在这里，我只是简单的说明下：
1. Jboss配置：
在以下web Site上download后，然后解压缩即可，建议:解压缩任何文件，最后不要使文件路径包含空格之类的字符，有时候会出现一些意想不到的错误。
web site:http://www.jboss.org/jbossas/downloads
注意:Jboss 4和Jboss 5在Jbossall_client.jar(Jboss 4)和Jboss_all_client.jar(Jboss 5)上有很大区别。
设置系统变量:
JBOSS_HOME:Jboss的解压缩路径
Path:%JBOSS_HOME%/bin
运行Bin目录下的Run.bat文件，以下是运行的log记录：
02:44:08,437 INFO [Server] Starting JBoss (MX MicroKernel)...02:44:08,437 INFO [Server] Release ID: JBoss [Trinity] 4.2.0.GA (build: SVNTag=JBoss_4_2_0_GA date=200705111440)02:44:08,453 INFO [Server] Home Dir: C:\TDDOWNLOAD\jboss-4.2.0.GA02:44:08,453 INFO [Server] Home URL: file:/C:/TDDOWNLOAD/jboss-4.2.0.GA/02:44:08,453 INFO [Server] Patch URL: null02:44:08,453 INFO [Server] Server Name: default02:44:08,453 INFO [Server] Server Home Dir: C:\TDDOWNLOAD\jboss-4.2.0.GA\server\default02:44:08,453 INFO [Server] Server Home URL: file:/C:/TDDOWNLOAD/jboss-4.2.0.GA/server/default/02:44:08,468 INFO [Server] Server Log Dir: C:\TDDOWNLOAD\jboss-4.2.0.GA\server\default\log02:44:08,468 INFO [Server] Server Temp Dir: C:\TDDOWNLOAD\jboss-4.2.0.GA\server\default\tmp02:44:08,468 INFO [Server] Root Deployment Filename: jboss-service.xml02:44:09,062 INFO [ServerInfo] Java version: 1.6.0_13,Sun Microsystems Inc.02:44:09,062 INFO [ServerInfo] Java VM: Java HotSpot(TM) Client VM 11.3-b02,Sun Microsystems Inc.02:44:09,062 INFO [ServerInfo] OS-System: Windows XP 5.1,x8602:44:09,859 INFO [Server] Core system initialized02:44:14,078 INFO [WebService] Using RMI server codebase: http://127.0.0.1:8083/02:44:14,078 INFO [Log4jService$URLWatchTimerTask] Configuring from URL: resource:jboss-log4j.xml02:44:15,062 INFO [TransactionManagerService] JBossTS Transaction Service (JTA version) - JBoss Inc.02:44:15,062 INFO [TransactionManagerService] Setting up property manager MBean and JMX layer02:44:15,484 INFO [TransactionManagerService] Starting recovery manager02:44:15,703 INFO [TransactionManagerService] Recovery manager started02:44:15,703 INFO [TransactionManagerService] Binding TransactionManager JNDI Reference02:44:21,625 INFO [EJB3Deployer] Starting java:comp multiplexer02:44:25,281 INFO [ServiceEndpointManager] jbossws-1.2.1.GA (build=200704151756)02:44:28,531 INFO [AprLifecycleListener] The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: F:\Program Files\Java\jdk1.6.0_13\bin02:44:28,718 INFO [Http11Protocol] Initializing Coyote HTTP/1.1 on http-127.0.0.1-808002:44:28,734 INFO [AjpProtocol] Initializing Coyote AJP/1.3 on ajp-127.0.0.1-800902:44:28,734 INFO [Catalina] Initialization processed in 846 ms02:44:28,734 INFO [StandardService] Starting service jboss.web02:44:28,734 INFO [StandardEngine] Starting Servlet Engine: JBossWeb/2.0.0.GA02:44:28,843 INFO [Catalina] Server startup in 104 ms02:44:29,156 INFO [TomcatDeployer] deploy, ctxPath=/, warUrl=.../deploy/jboss-web.deployer/ROOT.war/02:44:30,578 INFO [TomcatDeployer] deploy, ctxPath=/invoker, warUrl=.../deploy/http-invoker.sar/invoker.war/02:44:31,187 INFO [TomcatDeployer] deploy, ctxPath=/jbossws, warUrl=.../tmp/deploy/tmp7117955528796901291jbossws-context-exp.war/02:44:31,484 INFO [TomcatDeployer] deploy, ctxPath=/jbossmq-httpil, warUrl=.../deploy/jms/jbossmq-httpil.sar/jbossmq-httpil.war/02:44:33,265 INFO [TomcatDeployer] deploy, ctxPath=/web-console, warUrl=.../deploy/management/console-mgr.sar/web-console.war/02:44:34,671 INFO [MailService] Mail Service bound to java:/Mail02:44:35,203 INFO [RARDeployment] Required license terms exist, view META-INF/ra.xml in .../deploy/jboss-ha-local-jdbc.rar02:44:35,312 INFO [RARDeployment] Required license terms exist, view META-INF/ra.xml in .../deploy/jboss-ha-xa-jdbc.rar02:44:35,437 INFO [RARDeployment] Required license terms exist, view META-INF/ra.xml in .../deploy/jboss-local-jdbc.rar02:44:35,593 INFO [RARDeployment] Required license terms exist, view META-INF/ra.xml in .../deploy/jboss-xa-jdbc.rar02:44:35,781 INFO [RARDeployment] Required license terms exist, view META-INF/ra.xml in .../deploy/jms/jms-ra.rar02:44:35,984 INFO [RARDeployment] Required license terms exist, view META-INF/ra.xml in .../deploy/quartz-ra.rar02:44:36,000 INFO [QuartzResourceAdapter] start quartz!!!02:44:36,156 INFO [SimpleThreadPool] Job execution threads will use class loader of thread: main02:44:36,218 INFO [QuartzScheduler] Quartz Scheduler v.1.5.2 created.02:44:36,218 INFO [RAMJobStore] RAMJobStore initialized.02:44:36,218 INFO [StdSchedulerFactory] Quartz scheduler 'DefaultQuartzScheduler' initialized from default resource file in Quartz package: 'quartz.properties'02:44:36,218 INFO [StdSchedulerFactory] Quartz scheduler version: 1.5.202:44:36,234 INFO [QuartzScheduler] Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started.02:44:37,906 INFO [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=DataSourceBinding,name=DefaultDS' to JNDI name 'java:DefaultDS'02:44:38,484 INFO [A] Bound to JNDI name: queue/A02:44:38,484 INFO [B] Bound to JNDI name: queue/B02:44:38,500 INFO [C] Bound to JNDI name: queue/C02:44:38,500 INFO [D] Bound to JNDI name: queue/D02:44:38,500 INFO [ex] Bound to JNDI name: queue/ex02:44:38,546 INFO [testTopic] Bound to JNDI name: topic/testTopic02:44:38,546 INFO [securedTopic] Bound to JNDI name: topic/securedTopic02:44:38,562 INFO [testDurableTopic] Bound to JNDI name: topic/testDurableTopic02:44:38,562 INFO [testQueue] Bound to JNDI name: queue/testQueue02:44:38,640 INFO [UILServerILService] JBossMQ UIL service available at : /127.0.0.1:809302:44:38,734 INFO [DLQ] Bound to JNDI name: queue/DLQ02:44:39,093 INFO [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=ConnectionFactoryBinding,name=JmsXA' to JNDI name 'java:JmsXA'02:44:39,671 INFO [JmxKernelAbstraction] creating wrapper delegate for: org.jboss.ejb3.stateless.StatelessContainer02:44:39,687 INFO [JmxKernelAbstraction] installing MBean: jboss.j2ee:jar=EjbProject.jar,name=HelloWorldEjbBean,service=EJB3 with dependencies:02:44:39,984 INFO [EJBContainer] STARTED EJB: com.ejb.bean.HelloWorldEjbBean ejbName: HelloWorldEjbBean02:44:40,093 INFO [EJB3Deployer] Deployed: file:/C:/TDDOWNLOAD/jboss-4.2.0.GA/server/default/deploy/EjbProject.jar/02:44:40,281 INFO [TomcatDeployer] deploy, ctxPath=/jmx-console, warUrl=.../deploy/jmx-console.war/02:44:40,718 INFO [Http11Protocol] Starting Coyote HTTP/1.1 on http-127.0.0.1-808002:44:40,765 INFO [AjpProtocol] Starting Coyote AJP/1.3 on ajp-1[b]27.0.0.1-800902:44:40,781 INFO [Server] JBoss (MX MicroKernel) [4.2.0.GA (build: SVNTag=JBoss_4_2_0_GA date=200705111440)] Started in 32s:313ms
Exception in thread "main" java.lang.NoClassDefFoundError: javax/net/SocketFactoryat org.jnp.interfaces.NamingContextFactory.getInitialContext(NamingContextFactory.java:56)at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:667)at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247)at javax.naming.InitialContext.init(InitialContext.java:223)at javax.naming.InitialContext.<init>(InitialContext.java:175)at com.ejbclient.ejb.HelloWorldEjbClient.main(HelloWorldEjbClient.java:16)WARNING: Default charset GBK not supported, using ISO-8859-1 instead
package com.ejb.bean;/** * @author Jamson Huang * */public interface HelloWorldEjb { /*定义业务逻辑函数*/public String sayHelloWorld(String userName);}package com.ejb.bean;import javax.ejb.Remote;import javax.ejb.Stateless;/** * @author Jamson Huang * */@Stateless@Remotepublic class HelloWorldEjbBean implements HelloWorldEjb {public String sayHelloWorld(String userName){return "Hello World! "+userName;}}import java.util.Properties;import javax.naming.InitialContext;import com.ejb.bean.HelloWorldEjb;/** * @author Jamson Huang * @version 1.0.0 */public class HelloWorldEjbClient {public static void main(String[] args)throws Exception{/*Properties对象可以通过读取Jndi.properties文件产生，对于项目开发而言，应该是作为一个配置文件*/Properties props = new Properties();props.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");props.setProperty("java.naming.provider.url", "localhost:1099");props.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming");InitialContext context = new InitialContext(props);HelloWorldEjb helloWorldEjb = (HelloWorldEjb)context.lookup("HelloWorldEjbBean/remote");String strName = helloWorldEjb.sayHelloWorld("Jamson");System.out.println(strName);}}java.naming.factory.initial=org.jnp.interfaces.NamingContextFactoryjava.naming.factory.url.pkgs=org.jboss.naming\:org.jnp.interfacesjava.naming.provider.url=localhost:1099
log4j:WARN No appenders could be found for logger (org.jboss.security.SecurityAssociation).log4j:WARN Please initialize the log4j system properly.Hello World! Jamson