deploying ejb-module for ObjectDB fails: PersistenceProvider not found

Question

I have two almost identical projects (both created with maven, both very simple) where one deploys without any problems, the other gives me a PersistenceException:

javax.persistence.PersistenceException: JBAS011466: PersistenceProvider 'com.objectdb.jpa.Provider' not found

And I just don't see what I am missing here.

The working project is web application. I got it from the JPA Java EE 6 Tutorial. I has a simple jsp page, servlet, a database entity and a stateless bean for the entity.

When I deploy it, I can call the jsp, enter some example data which will be passed to the servlet, which then again writes the data into the ObjectDB database using the bean and the corresponding entity. simple.

The not working project is supposed to be an ejb-module with only the entity and the stateless bean.

But when I try deploying it on my local WildFly server, I get the above error. I also noticed, that the compiled ejb.jar has only a few kilobytes while the web application war files uses 1.4 MB. So I guess that it includes the necessary objectdb.jar library. But I can get the ejb.jar to include the library.

Here is my maven pom.xml of the working web application (sorry it's long):

<groupId>com.me</groupId>
<artifactId>ObjectDBMavenTest</artifactId>
<version>2.01.1-00001</version>
<packaging>war</packaging>

<name>ObjectDBMavenTest</name>

<properties>
    <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>       
    <dependency>
        <groupId>com.objectdb</groupId>
        <artifactId>objectdb</artifactId>
        <version>2.6.1_06</version>
    </dependency>
    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-web-api</artifactId>
        <version>7.0</version>
        <scope>provided</scope>
    </dependency>
</dependencies>
<repositories>
    <repository>
        <id>objectdb</id>
        <name>ObjectDB Repository</name>
        <url>http://m2.objectdb.com</url>
    </repository>
</repositories>
<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>

And as a comparison the pom.xml of the not working ejb project:

<groupId>com.me</groupId>
<artifactId>Database</artifactId>
<version>2.01.1-00001</version>
<packaging>ejb</packaging>

<name>Database</name>

<properties>
    <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies> 
    <dependency>
        <groupId>com.objectdb</groupId>
        <artifactId>objectdb</artifactId>
        <version>2.6.1_06</version>
    </dependency>
    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-web-api</artifactId>
        <version>7.0</version>
        <scope>provided</scope>
    </dependency>
</dependencies>
<repositories>
    <repository>
        <id>objectdb</id>
        <name>ObjectDB Repository</name>
        <url>http://m2.objectdb.com</url>
    </repository>
</repositories>
<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>${endorsed.dir}</endorseddirs>
                </compilerArguments>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-ejb-plugin</artifactId>
            <version>2.3</version>
            <configuration>
                <ejbVersion>3.1</ejbVersion>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>2.6</version>
            <executions>
                <execution>
                    <phase>validate</phase>
                    <goals>
                        <goal>copy</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>${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>

Frankly I don't see much of a difference, only that one is going to be a war file the other a jar.

If it makes any difference, here are my two persistence.xml files.

working

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
    <persistence-unit name="ObjectDBMavenTestPU" transaction-type="JTA">
        <provider>com.objectdb.jpa.Provider</provider>
        <properties>
            <property name="javax.persistence.jdbc.url" value="$objectdb/db/guests.odb"/>
            <property name="javax.persistence.jdbc.user" value="user"/>
            <property name="javax.persistence.jdbc.password" value="password"/>
        </properties>
    </persistence-unit>
</persistence>

and not working

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
  <persistence-unit name="MyDatabase" transaction-type="JTA">
    <provider>com.objectdb.jpa.Provider</provider>
    <properties>
      <property name="javax.persistence.jdbc.url" value="$objectdb/db/myDatabase.odb"/>
      <property name="javax.persistence.jdbc.user" value="user"/>
      <property name="javax.persistence.jdbc.password" value="password"/>
      <property name="javax.persistence.schema-generation.database.action" value="create"/>
    </properties>
  </persistence-unit>
</persistence>

Can anyone see what I am doing wrong here?

Answer 1

Wow just writing about it here on SO helped me find my error :) I just have to force maven to include all dependencies. This can be done by including the following plugin into the pom.xml:

<plugins>
 ...
 <plugin>
    <artifactId>maven-assembly-plugin</artifactId>
    <executions>
      <execution>
        <phase>package</phase>
        <goals>
          <goal>single</goal>
        </goals>
      </execution>
    </executions>
    <configuration>
      <descriptorRefs>
        <descriptorRef>jar-with-dependencies</descriptorRef>
      </descriptorRefs>
    </configuration>
  </plugin>
</plugins>

Now the needed objectdb.jar library is included as dependency to the ejb.jar and I finally can deploy it without errors. Thanks everyone for caring :)