问题描述
我想使用Maven构建和部署远程EJB。后来,我想要将这个EJB注入并使用到一个单独的WAR项目中。
I want to use Maven to build and deploy a Remote EJB. Later, I'll want to be able to inject and use this EJB into a separate WAR project.
所以我以为我需要一个定义界面的jar文件,并在两个项目中使用jar(ejb和war)。
So I thought I'll need a jar file that defines the interface, and use the jar in both projects (ejb and war).
我有一个名为的Maven项目的界面,例如:api
,打包成jar:
I have this interface, in a Maven project called example:api
, packaged as jar:
package example;
import javax.ejb.Remote;
@Remote
public interface Bean {
void process();
}
我在另一个名为的Maven项目中实现上述界面例如:ejb
,打包为ejb:
I implement the above interface in another Maven project called example:ejb
, packaged as ejb:
package example;
import javax.ejb.Stateless;
@Stateless
public class Ejb implements Bean {
@Override
public void process() {
}
}
ejb项目使用 maven-ejb-plugin
:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ejb-plugin</artifactId>
<version>2.3</version>
<configuration>
<ejbVersion>3.1</ejbVersion>
</configuration>
</plugin>
这两个项目都依赖于 javaee-api
:
And both projects depend on javaee-api
:
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>6.0</version>
<scope>provided</scope>
</dependency>
现在把它们放在一起,我创建了一个名为的第三个Maven项目:ear
,打包成 ear
:
Now to put them together, I made a third Maven project, called example:ear
, packaged as ear
:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>example</groupId>
<artifactId>ear</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>ear</packaging>
<name>ear</name>
<dependencies>
<dependency>
<groupId>example</groupId>
<artifactId>api</artifactId>
<version>0.0.1-SNAPSHOT</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>example</groupId>
<artifactId>ejb</artifactId>
<version>0.0.1-SNAPSHOT</version>
<type>ejb</type>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ear-plugin</artifactId>
<configuration>
<modules>
<ejbModule>
<groupId>example</groupId>
<artifactId>ejb</artifactId>
</ejbModule>
<jarModule>
<groupId>example</groupId>
<artifactId>api</artifactId>
</jarModule>
</modules>
</configuration>
</plugin>
</plugins>
</build>
</project>
问题是我无法部署此耳机项目。我收到以下错误:
The problem is that I can't deploy this ear project. I get the following error:
09:39:39,702 INFO [org.jboss.as.server.deployment.scanner] (DeploymentScanner-threads - 2) JBAS015003: Found ear.ear in deployment directory. To trigger deployment create a file called ear.ear.dodeploy
09:39:39,713 INFO [org.jboss.as.server.deployment] (MSC service thread 1-6) JBAS015876: Starting deployment of "ear.ear"
09:39:39,773 INFO [org.jboss.as.server.deployment] (MSC service thread 1-1) JBAS015876: Starting deployment of "ejb-0.0.1-SNAPSHOT.jar"
09:39:39,793 WARN [org.jboss.modules] (MSC service thread 1-8) Failed to define class example.Ejb in Module "deployment.ear.ear.ejb-0.0.1-SNAPSHOT.jar:main" from Service Module Loader: java.lang.LinkageError: Failed to link example/Ejb (Module "deployment.ear.ear.ejb-0.0.1-SNAPSHOT.jar:main" from Service Module Loader)
at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:396)
[...]
Caused by: java.lang.NoClassDefFoundError: example/Bean
at java.lang.ClassLoader.defineClass1(Native Method) [rt.jar:1.7.0_03]
[...]
Caused by: java.lang.ClassNotFoundException: example.Bean from [Module "deployment.ear.ear.ejb-0.0.1-SNAPSHOT.jar:main" from Service Module Loader]
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)
我正在使用JBoss AS 7.1.1,如果有任何区别。
I'm using JBoss AS 7.1.1, if it makes any difference.
你知道我在做什么错吗?
Do you know what I'm doing wrong?
推荐答案
我更改了 maven-ear-插件
:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ear-plugin</artifactId>
<version>2.6</version>
<configuration>
<version>6</version>
<defaultLibBundleDir>lib</defaultLibBundleDir>
</configuration>
</plugin>
这样就可以了。
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