将EJB本地客户端从JBoss 6迁移到Wildfly 10

时间:2016-06-25 21:59:02

标签: java-ee jboss java-ee-7 wildfly-10

从JBoss 6迁移到WildFly 10 期间获取旧版应用程序中会话bean的引用时,我面临以下JNDI查找问题。

以下代码在JBoss 6中有效,它引用了会话bean" OMGenEJB",然后用于获取代理对象" genhome"与豆子互动。

    try {
        InitialContext ic = new InitialContext();
        Object objRef = ic.lookup("ejb/OMGenEJB");
        OMGenEJBHome genhome = 
          (OMGenEJBHome) PortableRemoteObject.narrow ( objRef, OMGenEJBHome.class );

...

EJB主页界面 OMGenEJBHome

EJB实现类是OMGenBean。

bean在" ejb-jar.xml"中定义,如下所示:

  <session >
     <ejb-name>OMGenEJB</ejb-name>
     <home>com.irisel.oms.ejb.interfaces.OMGenEJBHome</home>
     <remote>com.irisel.oms.ejb.interfaces.OMGenEJB</remote>
     <service-endpoint>com.irisel.oms.ws.OMBrowserEndpoint</service-endpoint>
     <ejb-class>com.irisel.oms.ejb.browser.OMGenBean</ejb-class>
     <session-type>Stateless</session-type>
     <transaction-type>Bean</transaction-type>
  </session>

现在,客户端类属于与EJB jar位于同一EAR中的WAR。

正确部署EAR,启动时服务器记录以下 JNDI条目

21:39:18,770 INFO  [org.jboss.as.ejb3.deployment] (MSC service thread 1-3) WFLYEJB0473: JNDI bindings for session bean named 'OMGenEJB' in deployment unit 'subdeployment "HolmesEJB-2.0.jar" of deployment "HolmesBSS-2.0.ear"' are as follows:

java:global/HolmesBSS-2.0/HolmesEJB-2.0/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJB
java:app/HolmesEJB-2.0/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJB
java:module/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJB
java:jboss/exported/HolmesBSS-2.0/HolmesEJB-2.0/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJB
java:global/HolmesBSS-2.0/HolmesEJB-2.0/OMGenEJB!com.irisel.oms.ejb.browser.OMGenBean
java:app/HolmesEJB-2.0/OMGenEJB!com.irisel.oms.ejb.browser.OMGenBean
java:module/OMGenEJB!com.irisel.oms.ejb.browser.OMGenBean
java:global/HolmesBSS-2.0/HolmesEJB-2.0/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJBHome
java:app/HolmesEJB-2.0/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJBHome
java:module/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJBHome
java:jboss/exported/HolmesBSS-2.0/HolmesEJB-2.0/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJBHome

下面是在初始上下文中打印JNDI条目的修改,如客户端所示,&#34; java:comp / env&#34;

protected void init2(Credentials creds) throws SQLException, ConfigException, RemoteException {

    logger = org.apache.log4j.Logger.getLogger(this.getClass());

    try {

        logger.info("Connecting to ejb/OMGenEJB");

        InitialContext ic = new InitialContext();

        // this code lists the entries in the initial context
        NamingEnumeration<NameClassPair> list = ic.list("");
        while (list.hasMore()) {
          System.out.println(list.next().getName());
        }


        Context envCtx = (Context)ic.lookup("java:comp/env");

        // this code lists the entries in java:comp/env context
        list = envCtx.list("");
        while (list.hasMore()) {
              System.out.println(list.next().getName());
        }

        Object objRef2 = envCtx.lookup("ejb/OMGenEJB");

        logger.info("Narrowing to class OMGenEJBHome #"+OMGenEJBHome.class.hashCode());
        OMGenEJBHome genhome = (OMGenEJBHome)PortableRemoteObject.narrow(objRef2, OMGenEJBHome.class);

...

修改后的代码生成这些日志:

23:23:43,445 INFO  [com.irisel.oms.olapi.CLEJBBrowser] (default task-16) Connecting to ejb/OMGenEJB
23:23:44,274 INFO  [stdout] (default task-16) Mail

23:23:44,669 INFO  [stdout] (default task-16) TransactionManager

事实证明,初始上下文是&#34; java:&#34; ,因为Mail和TransactionManager具有JNDI名称&#34; java:/ Mail&#34;和&#34; java:/ TransactionManager&#34;分别。但是,我希望相对路径是相对于java:comp / env。

接下来,我们会看到条目&#34; ejb&#34;:

23:23:46,163 INFO  [stdout] (default task-16) com.irisel.oms.ws.server.KnockKnockImpl

23:23:46,789 INFO  [stdout] (default task-16) ejb

23:23:50,146 INFO  [stdout] (default task-16) com.irisel.oms.ws.server.HolmesImpl

我的问题是

  1. 为什么&#34; java:comp / env&#34;不再是默认上下文,而是&#34; java:&#34;,
  2. 为什么查找&#34; ejb / OMGenEJB&#34;修改代码

    也失败了

    23:23:51,680 INFO [stdout](默认任务-16)异常:WFLYNAM0062:无法查找env / ejb / OMGenEJB

  3. 如果我们尝试查找&#34; ejb&#34;相反,查找工作正常。

    所以我也尝试了这个:

        try {
            logger.info("Connecting to ejb/OMGenEJB");
            InitialContext ic = new InitialContext();
            NamingEnumeration<NameClassPair> list = ic.list("");
            while (list.hasMore()) {
              System.out.println("ic entry:"+list.next().getName());
            }
            Context envCtx = (Context)ic.lookup("java:comp/env/ejb");
            list = envCtx.list("");
            while (list.hasMore()) {
                  System.out.println("envCtx entry:"+list.next().getName());
            }
            Object objRef2 = envCtx.lookup("OMGenEJB");
            logger.info("Narrowing to class OMGenEJBHome #"+OMGenEJBHome.class.hashCode());
            OMGenEJBHome genhome = (OMGenEJBHome)PortableRemoteObject.narrow(objRef2, OMGenEJBHome.class);
    
            //browser = genhome.create();
            //className = browser.getClassNames();
    
            genejb = genhome.create();
            appvo = (AppVO) AppVO.readObject64(this.genejb.exec("getApp",null,null));
    
        } catch (Exception ex) {
            System.out.println("Exception :"+ ex.getMessage());
            ConfigException ce = new ConfigException("Cannot initialize remote EJB client");
            ce.initCause(ex);
            throw ce;
        } 
    

    生成这些日志:

    00:35:52,048 INFO  [com.irisel.oms.olapi.CLEJBBrowser] (default task-2) Connecting to ejb/OMGenEJB
    00:35:52,823 INFO  [stdout] (default task-2) ic entry:Mail
    
    00:35:53,123 INFO  [stdout] (default task-2) ic entry:TransactionManager
    
    00:35:53,992 INFO  [stdout] (default task-2) envCtx entry:OMBrowserEJB
    
    00:35:54,314 INFO  [stdout] (default task-2) envCtx entry:OMGenEJB
    
    00:36:25,649 INFO  [stdout] (default task-2) Exception :WFLYNAM0062: Failed to lookup env/ejb/OMGenEJB
    
    00:36:25,650 ERROR [stderr] (default task-2) com.irisel.util.ConfigException: Cannot initialize remote EJB client
    
    00:36:25,650 ERROR [stderr] (default task-2)    at com.irisel.oms.olapi.CLEJBBrowser.init2(CLEJBBrowser.java:82)
    ...
    00:36:25,671 ERROR [stderr] (default task-2) Caused by: javax.naming.NamingException: WFLYNAM0062: Failed to lookup env/ejb/OMGenEJB [Root exception is java.lang.RuntimeException: javax.naming.NameNotFoundException: ejb/OMGenEJB -- service jboss.naming.context.java.ejb.OMGenEJB]
    
    00:36:25,671 ERROR [stderr] (default task-2)    at org.jboss.as.naming.ServiceBasedNamingStore.lookup(ServiceBasedNamingStore.java:157)
    
    ... ... 39 more
    
    00:36:25,672 ERROR [stderr] (default task-2) Caused by: java.lang.RuntimeException: javax.naming.NameNotFoundException: ejb/OMGenEJB -- service jboss.naming.context.java.ejb.OMGenEJB
    
    00:36:25,672 ERROR [stderr] (default task-2)    at org.jboss.as.ejb3.deployment.processors.EjbLookupInjectionSource$1.getReference(EjbLookupInjectionSource.java:99)
    
    00:36:25,672 ERROR [stderr] (default task-2)    at org.jboss.as.naming.ServiceBasedNamingStore.lookup(ServiceBasedNamingStore.java:143)
    
    00:36:25,676 ERROR [stderr] (default task-2)    ... 44 more
    
    00:36:25,676 ERROR [stderr] (default task-2) Caused by: javax.naming.NameNotFoundException: ejb/OMGenEJB -- service jboss.naming.context.java.ejb.OMGenEJB
    
    00:36:25,676 ERROR [stderr] (default task-2)    at org.jboss.as.naming.ServiceBasedNamingStore.lookup(ServiceBasedNamingStore.java:106)
    
    00:36:25,677 ERROR [stderr] (default task-2)    at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:207)
    
    00:36:25,677 ERROR [stderr] (default task-2)    at org.jboss.as.naming.InitialContext$DefaultInitialContext.lookup(InitialContext.java:235)
    
    00:36:25,677 ERROR [stderr] (default task-2)    at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:193)
    
    00:36:25,677 ERROR [stderr] (default task-2)    at org.jboss.as.naming.NamingContext.lookup(NamingContext.java:189)
    
    00:36:25,677 ERROR [stderr] (default task-2)    at javax.naming.InitialContext.lookup(InitialContext.java:417)
    
    00:36:25,677 ERROR [stderr] (default task-2)    at javax.naming.InitialContext.lookup(InitialContext.java:417)
    
    00:36:25,677 ERROR [stderr] (default task-2)    at org.jboss.as.ejb3.deployment.processors.EjbLookupInjectionSource$1.getReference(EjbLookupInjectionSource.java:81)
    
    00:36:25,677 ERROR [stderr] (default task-2)    ... 45 more
    

    工作的解决方案是使用全局或应用名称,问题是它包含耳朵名称和版本......

    "java:global/HolmesBSS-2.0/HolmesEJB-2.0/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJBHome"
    "java:app/HolmesEJB-2.0/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJBHome"
    

    这些无法正常工作

    "java:module/OMGenEJB!com.irisel.oms.ejb.browser.OMGenBean"
    "java:module/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJBHome"
    "java:comp/env/ejb/OMGenEJB"
    

    如果您认为这符合Java-7规范,我想与您联系。

    由于

1 个答案:

答案 0 :(得分:2)

Java EE 7的可移植JNDI名称具有以下形式:

java:global/<app-name>/<module-name>/<bean-name>!<fully-qualified-bean-interface-name>

默认应用程序名称是没有扩展名(.ear)的耳朵的名称。您可以在application.xml中设置应用程序名称

<application xmlns="http://java.sun.com/xml/ns/javaee" 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/application_6.xsd" version="6">
    <application-name>myApp</application-name>
</application>

默认模块名称是没有扩展名(.jar)的ejb-jar名称。您可以在ejb-jar.xml中更改它

<ejb-jar xmlns = "http://java.sun.com/xml/ns/javaee" 
         version = "3.1"
         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/ejb-jar_3_1.xsd">
    <module-name>myModule</module-name>
</ejb-jar>

结果是:

java:global/myApp/myModule/OMGenEJB!com.irisel.oms.ejb.interfaces.OMGenEJBHome

注意:您不能使用ejb-jar.xml中的“mappedName”绑定到不同的JNDI名称,因为Wildfly不允许它。 Wildfly只允许上述形式。