第一次接触ejb2011-01-19这是我第一次使用EJB,以前从来没有接触过,也许是因为没有几乎,也许是因为敬畏。在青州实习有机会使用EJB了,实际上是可用可不用(培训课程的网上提交),但我认为这是个学习的机会,就开始独自摸爬滚打了。我采用Eclipse3.0+JBoss3.2.5+JBossIDE1.3.30+Sybase Adaptive SQL Anywhere9.0的模式。没有太多的难点,但是还是折腾了2天多。问题1:下载了JBoss3.2.5和JBossIDE1.3.30,但是如何安装这个IDE插件到Eclipse当中呢?首先询问Eclipse插件开发经验的人,说插件一般拷贝到plugin目录下就可以了,然后customize perspective里面选择相应的选项就可以了,比如(New,open perspective和show view,New是说可以new出相应的工程或者文件,show view就是可以生成一个相应的视图)。但是我把JBossIDE解压拷贝到plugin中后,在customize的时候只发现了几个能在show view中出现的选项,和JBoss网站上下载的tutorial上说的有新建工程不同。所以郁闷了一阵。解决的方法是install手册上说应该用Eclipse的Help->Software Updates->Find and install...菜单,然后添加相应JBossIDE的更新网站就可以了。按照说明果然成功。后来又进行了default sever的设置,参见JBossIDE tutorial上的最后部分。问题2:连接http://localhost:8080/ 后的相应的jsp网页报告找不到co.sun.tools.javac.Main,报告可能的原因是该类不在JAVA_HOME目录下。我首先在环境变量中设置但是没有作用,后来在Eclipse的Window->Preferences菜单下的Java->Installed JREs中编辑j2re1.4.2里面Add External JARs添加了tools.jar,然后就好使了。问题3:如何将Sybase ASA(Adaptive sql anywhere)加入JBoss中。我参考了比较多的资料。在Huihoo.org(http://www.huihoo.org/jboss/)上找的一篇文章还不错。如下:Jboss3.0-tomcat4.03的配置-4(数据库的配置)(灰狐动力-中间件技术论坛 by huihoo.com Etre)Jboss3.0-Tomcat4.03的数据库的配置(以Oracle为例)一、 请将classes12.zip加入classpath中去。二、请参况hsqldb-service.xml文件编写Oracledb-service.xml文件请打开serverdefaultdeploy目录下的hsqldb-service.xml文件,这就是一个Jboss3.0_Tomcat4.03下实现数据库连接的例子,它是连接hsql数据库的它的内容如下:<?xml version="1.0" encoding="UTF-8"?>
<!-- ===================================================================== -->
<!-- -->
<!-- JBoss Server Configuration -->
<!-- -->
<!-- ===================================================================== -->
<!-- $Id: hsqldb-service.xml,v 1.2.2.5 2002/06/23 21:25:58 d_jencks Exp $ -->
<server>
<!-- ==================================================================== -->
<!-- New ConnectionManager setup for default hsql dbs -->
<!-- Build jmx-api (build/build.sh all) and view for config documentation -->
<!-- ==================================================================== -->
<mbean code="org.jboss.resource.connectionmanager.LocalTxConnectionManager" name="jboss.jca:service=LocalTxCM,name=hsqldbDS">
<!-- Include a login module configuration named HsqlDbRealm.
Update your login-conf.xml, here is an example for a
ConfiguredIdentityLoginModule:
<application-policy name = "HsqlDbRealm">
<authentication>
<login-module code = "org.jboss.resource.security.ConfiguredIdentityLoginModule" flag = "required">
<module-option name = "principal">sa</module-option>
<module-option name = "userName">sa</module-option>
<module-option name = "password"></module-option>
<module-option name = "managedConnectionFactoryName">jboss.jca:service=LocalTxCM,name=hsqldbDS</module-option>
</login-module>
</authentication>
</application-policy>
NOTE: the application-policy name attribute must match
SecurityDomainJndiName, and the
module-option name = "managedConnectionFactoryName"
must match the object name of the ConnectionManager you are configuring here.
-->
<!--uncomment out this line if you are using the DB2DbRealm above
<attribute name="SecurityDomainJndiName">HsqlDbRealm</attribute>
-->
<depends optional-attribute-name="ManagedConnectionFactoryName">
<!--embedded mbean-->
<mbean code="org.jboss.resource.connectionmanager.RARDeployment" name="jboss.jca:service=LocalTxDS,name=hsqldbDS">
<attribute name="JndiName">DefaultDS</attribute>
<attribute name="ManagedConnectionFactoryProperties">
<properties>
<config-property name="ConnectionURL" type="java.lang.String">jdbc:hsqldb:hsql://localhost:1476</config-property>
<config-property name="DriverClass" type="java.lang.String">org.hsqldb.jdbcDriver</config-property>
<config-property name="UserName" type="java.lang.String">sa</config-property>
<config-property name="Password" type="java.lang.String"></config-property>
</properties>
</attribute>
<!--Below here are advanced properties -->
<!--hack-->
<depends optional-attribute-name="OldRarDeployment">jboss.jca:service=RARDeployment,name=JBoss LocalTransaction JDBC Wrapper</depends>
<depends>jboss:service=Hypersonic</depends>
</mbean>
</depends>
<depends optional-attribute-name="ManagedConnectionPool">
<!--embedded mbean-->
<mbean code="org.jboss.resource.connectionmanager.JBossManagedConnectionPool" name="jboss.jca:service=LocalTxPool,name=hsqldbDS">
<attribute name="MinSize">0</attribute>
<attribute name="MaxSize">50</attribute>
<attribute name="BlockingTimeoutMillis">5000</attribute>
<attribute name="IdleTimeoutMinutes">15</attribute>
<!--criteria indicates if Subject (from security domain) or app supplied
parameters (such as from getConnection(user, pw)) are used to distinguish
connections in the pool. Choices are
ByContainerAndApplication (use both),
ByContainer (use Subject),
ByApplication (use app supplied params only),
ByNothing (all connections are equivalent, usually if adapter supports
reauthentication)-->
<attribute name="Criteria">ByContainer</attribute>
</mbean>
</depends>
<depends optional-attribute-name="CachedConnectionManager">jboss.jca:service=CachedConnectionManager</depends>
<depends optional-attribute-name="JaasSecurityManagerService">jboss.security:service=JaasSecurityManager</depends>
<attribute name="TransactionManager">java:/TransactionManager</attribute>
<!--make the rar deploy! hack till better deployment-->
<depends>jboss.jca:service=RARDeployer</depends>
</mbean>
<!-- Moved to end to test anonymous depends -->
<mbean code="org.jboss.jdbc.HypersonicDatabase"
name="jboss:service=Hypersonic">
<attribute name="Port">1476</attribute>
<attribute name="Silent">true</attribute>
<attribute name="Database">default</attribute>
<attribute name="Trace">false</attribute>
</mbean>
</server>