java EJB 注入错误
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EJB Injection error
提问by Heidarzadeh
I have an EAR file (JEE6) containing one ejb-jar (sample-ejb) file and one war file (sample-web). Here is the structure:
我有一个 EAR 文件 (JEE6)，其中包含一个 ejb-jar (sample-ejb) 文件和一个 war 文件 (sample-web)。这是结构：
sample-ear
|----sample-ejb.jar
| |---TestEjb.java (@Singleton)
|
|----sample-web
|---StartupEjb.java (@Singleton,@Startup)
|---TestListener.java (@WebListener)
when I want to inject TestEjb to StartupEjb or TestListener:
当我想将 TestEjb 注入 StartupEjb 或 TestListener 时：
@EJB
private TestEjb testEjb;
I get following error:
我收到以下错误：
Glassfish:
玻璃鱼：
Caused by: com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Remote ejb-ref name=com.sample.StartupEjb/testEjb,Remote 3.x interface =com.sample.TestEjb,ejb-link=null,lookup=,mappedName=,jndi-name=com.sample.TestEjb,refType=Session into class com.sample.StartupEjb: Lookup failed for 'java:comp/env/com.sample.StartupEjb/testEjb' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming}
weblogic:
网络逻辑：
Caused By: weblogic.application.naming.ReferenceResolutionException: [J2EE:160200]Error resolving ejb-ref "com.sample.StartupEjb/testEjb" from module "sample-web-1.0-SNAPSHOT.war" of application "com.sample_sample-ear_ear_1.0-SNAPSHOT". The ejb-ref does not have an ejb-link and the JNDI name of the target bean has not been specified. Attempts to automatically link the ejb-ref to its target bean failed because no EJBs in the application were found to implement the "com.sample.TestEjb" interface. Link or map this ejb-ref to its target EJB and ensure the interfaces declared in the ejb-ref are correct.
Both Glassfish and Weblogic can not find TestEjb!
Glassfish 和 Weblogic 都找不到 TestEjb！
By the way, when I create a remote interface for TestEjb and use that for injection it works well! But I don't want to define remote interfaces and I want to use EJB with no interface. I don't think that I must define a remote interface for this simple usecase!
顺便说一句，当我为 TestEjb 创建一个远程接口并将其用于注入时，它运行良好！但是我不想定义远程接口，我想使用没有接口的 EJB。我不认为我必须为这个简单的用例定义一个远程接口！
You can download the source code from here: https://dl.dropbox.com/sh/63hn3n9y3p5ypvi/SsG9iZIvx9/sample.zip?dl=1
您可以从这里下载源代码：https: //dl.dropbox.com/sh/63hn3n9y3p5ypvi/SsG9iZIvx9/sample.zip?dl=1
It's a simple Maven project created using NetBeans.
这是一个使用 NetBeans 创建的简单 Maven 项目。
回答by Martin Metz
You normaly MUST define a local interface, e. g.
你通常必须定义一个本地接口，例如
@Singleton
@Local(PublicInterface.class)
public class MyBean implements PublicInterface {
...
}
If you explicitly avoid this interface you must mark your bean as @LocalBean:
如果您明确避免使用此接口，则必须将您的 bean 标记为 @LocalBean：
@Singleton
@LocalBean
public class MyBean {
...
}
PS: Code is untested but should help.
PS：代码未经测试，但应该会有所帮助。
