how to import java files from ejb module in web app? - maven

Question

i create ear project and i have 2 module named:
mavenproject4-web
mavevnproject4-ejb
i try to import some interface and entity from ejb module in web module.But i can't.
i tried to add ejb module as dependency into web module by pom.xml.Then my problem fixed.Is it right way?
after adding dependency i tried to run project and i got this exception:
Severe: Exception while preparing the app : Could not resolve a persistence unit corresponding to the persistence-context-ref-name [mysessionbeans.StudentDAOImpl/entityManager] in the scope of the module called [mavenproject4-ear#mavenproject4-ejb-1.0.jar]. Please verify your application.
my persistence xml is in "src/main/resources" in ejb module.Detail information about project structure in image:
My web app pom.xml
<?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>
<parent>
<artifactId>mavenproject4</artifactId>
<groupId>az.lsim</groupId>
<version>1.0</version>
</parent>
<groupId>az.lsim</groupId>
<artifactId>mavenproject4-web</artifactId>
<version>1.0</version>
<packaging>war</packaging>
<name>mavenproject4-web</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>az.lsim</groupId>
<artifactId>mavenproject4-ear</artifactId>
<version>1.0</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
<compilerArguments>
<endorseddirs>${endorsed.dir}</endorseddirs>
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<outputDirectory>${endorsed.dir}</outputDirectory>
<silent>true</silent>
<artifactItems>
<artifactItem>
<groupId>javax</groupId>
<artifactId>javaee-endorsed-api</artifactId>
<version>7.0</version>
<type>jar</type>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
Thanks

Answer 1

The ejb jar file will need to be in the ear file. But I also think that the persistence.xml file needs to be in META-INF folder in the EJB jar file. I suspect that the way you have it there, it's in the root folder. Try moving it to src/main/resources/META-INF/persistence.xml
See http://docs.oracle.com/cd/E14101_01/doc.1013/e13981/pkgapp001.htm