Imprimer

Dans cet exemple nous allons voir :

 

1 Création du projet Maven de type jar contenant les interfaces

1.1 Le fichier pom.xml

Les interfaces à implémenter sont regroupées dans un projet maven dédié dont voici le pom :

<?xml version="1.0" encoding="UTF-8"?>
<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>com.mycompany.prj1</groupId>
    <artifactId>inter</artifactId>
    <packaging>jar</packaging>
     <version>1.0</version>
    <name>Prj1Interface</name>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
    </properties>
     <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
</project>

1.1 Création de l'interface

package com.mycompany.prj1.inter;

import javax.ejb.Remote;

@Remote
public interface ISimpleSession {
    public String sayHello();
}

 

2 Création du projet Maven de type EJB

2.1 Le fichier pom.xml

Voici le fichier pom.xml correspondant :

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mycompany.prj1</groupId>
    <artifactId>testEjbSession</artifactId>
    <packaging>ejb</packaging>
    <version>1.0</version>
    <name>Prj1TestEjbSession</name>
    <url>http://maven.apache.org</url>
    <dependencies>
<dependency> <groupId>com.mycompany.prj1</groupId> <artifactId>inter</artifactId> <version>1.0</version> <type>jar</type> </dependency> <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>7.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.2</version> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-ejb-plugin</artifactId> <version>2.3</version> <configuration> <ejbVersion>3.2</ejbVersion> </configuration> </plugin> </plugins> <finalName>testEjbSession</finalName> </build> </project>

2.2 Création de l'EJB de type stateless

package com.mycompany.prj1.ejb;

import com.mycompany.prj1.inter.ISimpleSession;
import javax.ejb.Stateless;

@Stateless
public class SimpleSessionBean implements ISimpleSession{

    private final String message = "Hello";

    public String sayHello() {
        return message;
    }
}

1.3 Déploiement de l'EJB

Déployer cet ejb sur le serveur Glassfish.

 

3 Création du projet Maven pour tester l'EJB

3.1 Le fichier pom.xml

Voici le fichier pom.xml correspondant:

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mycompany.prj1</groupId>
    <artifactId>testEjbSessionClient</artifactId>
    <packaging>jar</packaging>
    <version>1.0</version>
    <name>Prj1TestEjbSessionClient</name>
    <url>http://maven.apache.org</url>    
    <dependencies>
        <dependency>
            <groupId>com.mycompany.prj1</groupId>
            <artifactId>inter</artifactId>
            <version>1.0</version>
            <type>jar</type>
        </dependency>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
    <build>
        <finalName>testEjbSessionClient</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>2.4</version>
                <configuration>
                    <archive>
                        <manifest>
                            <mainClass>
                                com.mycompany.prj1.clientEjb.SessionBeanClient
                            </mainClass>
                            <addClasspath>true</addClasspath>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
            <plugin>
                <!-- NOTE: We don't need a groupId specification because the group is
                    org.apache.maven.plugins ...which is assumed by default.
                -->
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.4</version>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                    <archive>
                        <manifest>
                            <mainClass>com.mycompany.prj1.clientEjb.SessionBeanClient</mainClass>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

3.2 Création du client de l'EJB

package com.mycompany.prj1.clientEjb;

import com.mycompany.prj1.inter.ISimpleSession;
import javax.ejb.EJB;
import javax.naming.NamingException;

public class SessionBeanClient {

    @EJB
    private static ISimpleSession simpleSession;

    private void invokeSessionBeanMethods() throws NamingException {
        System.out.println(simpleSession.sayHello());

        System.out.println("\nSimpleSession is of type: "
                + simpleSession.getClass().getName());
    }

    public static void main(String[] args) throws NamingException {
        new SessionBeanClient().invokeSessionBeanMethods();
    }
}


3.3 Génération du jar client avec maven assembly:assembly

mvn assembly:assembly

3.4 Exécution du client EJB avec appclient

appclient -client target/testEjbSessionClient-jar-with-dependencies.jar  
Hello

SimpleSession is of type: com.mycompany.prj1.ejb._ISimpleSession_Wrapper