Voglio utilizzare Maven per creare e distribuire un EJB remoto. In seguito, desidero essere in grado di iniettare e utilizzare questo bean in un progetto WAR separato.Come posso creare e distribuire un EJB remoto con Maven?
Quindi ho pensato che avrò bisogno di un file jar che definisca l'interfaccia e utilizzi il jar in entrambi i progetti (ejb e war).
ho questa interfaccia, in un progetto Maven chiamato example:api
, confezionato come vaso:
package example;
import javax.ejb.Remote;
@Remote
public interface Bean {
void process();
}
implemento interfaccia di cui sopra in un altro progetto Maven chiamato example:ejb
, confezionato come ejb:
package example;
import javax.ejb.Stateless;
@Stateless
public class Ejb implements Bean {
@Override
public void process() {
}
}
Il progetto ejb utilizza lo 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>
E entrambi i progetti dipendono javaee-api
:
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>6.0</version>
<scope>provided</scope>
</dependency>
Ora di metterli insieme, ho fatto un terzo progetto Maven, chiamato example:ear
, confezionato come 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>
Il problema è che posso' t distribuire questo progetto ear. Viene visualizzato il seguente errore:
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)
Sto usando JBoss AS 7.1.1, se fa alcuna differenza.
Sai cosa sto facendo male?