No Persistence provider for EntityManager in tomcat

peser · **Joined:** Sat Mar 04, 2006 12:17 pm **Posts:** 4

I get "javax.persistence.PersistenceException: No Persistence provider for EntityManager named fadao" when I do "emf = Persistence.createEntityManagerFactory("fadao");" out of a tomcat 5 Servlet (JSP to be exactly). No Applicationserver is used, just J2SE.
However, with a "this.getClass().getClassLoader().getResources("META-INF/persistence.xml");" I can retrieve the URL of the persistence.xml file, but not with "ClassLoader.getSystemClassLoader().getResources("META-INF/persistence.xml");"

The persistence.xml:

<?xml version="1.0" encoding="UTF-8"?>

<persistence>
<persistence-unit name="fadao" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.ejb.cfgfile" value="hibernate.cfg.xml"/>
</properties>
</persistence-unit>
</persistence>

Classloader problems is just a guess from me.

Thanks for any help!

emmanuel · **Posted:** Sun Mar 12, 2006 4:40 pm

what is your war structure?

peser · **Joined:** Sat Mar 04, 2006 12:17 pm **Posts:** 4

Thanks for answering.

All the hibernate/persistence related things is separated from the web stuff in a .jar library under WEB-INF/lib. The persistence.xml is in this jar in the META-INF directory.

Thanks, Peter

emmanuel · **Posted:** Tue Mar 14, 2006 8:57 am

hibernate-entitymanager is in the WEB-INF/lib, then.
What I do is to use the thread context classloader. So Tomcat might not set it properly, but that's weird.

peser · **Joined:** Sat Mar 04, 2006 12:17 pm **Posts:** 4

Emmanuel,

solved it, Classloader issues were not the reason (Thread().currendThread().getContextClassLoader() showed the resource), but missing lib in the classpath (at the end I don't know which).

Many thanks for your help,

Peter

jefmsmit · **Joined:** Mon Dec 12, 2005 6:00 pm **Posts:** 11

I am having a very similar problem with tomcat. Do you have any more info on your solution. I have persistence.xml in WEB-INF/classes/META-INF. I tried accessing this file through various class loader shenanigans.

this.getClass().getClassLoader().getResource("META-INF/persistence.xml")
works

ClassLoader.getSystemClassLoader().getResource("META-INF/persistence.xml")
doesn't work

Thread.currentThread().getContextClassLoader().getResource("META-INF/persistence.xml")
works

I added antlr, asm, asm-attrs, c3p0, cglib, commons-collections, dom4j, ehcache and jta jars to my web app. I already had commons-logging and log4j.

I still get the "javax.persistence.PersistenceException: No Persistence provider for EntityManager named em1" exception.

peser · **Joined:** Sat Mar 04, 2006 12:17 pm **Posts:** 4

for me it was missing libraries, but my persistence.xml is in the META-INF directory inside a (selfmade) jar-file under WEB-INF/lib and this is the right place as all stuff with hibernate resides in this jar.
So if your persistence.xml is in WEB-INF/classes/META-INF there must be also the classes under WEB-INF/classes I believe (unbundled).

Thread.currentThread().getContextClassLoader().getResource("META-INF/persistence.xml") works, sounds good.

my jars are:
ejb3-persistence
hibernate-annotations
hibernate-entitymanager
hibernate3
javassist.jar
jboss-archive-browsing
antlr-2.7.6rc1
asm-attrs
asm
cglib-2.1.3
commons-collections-2.1.1
commons-logging-1.0.4
dom4j-1.6.1
ehcache-1.1
jdbc2_0-stdext
jta
xml-apis
ufff, not all, but all related to hibernate I believe...

jefmsmit · **Joined:** Mon Dec 12, 2005 6:00 pm **Posts:** 11

Turns out I was missing the entity manager jar and its dependents :)
Whoops!, I guess its been a long week.

Now the EntityManager stuff only fails with:
javax.persistence.PersistenceException: java.lang.IllegalArgumentException: could not instantiate ClassValidator

I assume that is completely unrelated, and should be easy to fix. Thanks for your help.

-jeff

khalidhajsaleh · **Joined:** Tue Aug 09, 2005 3:03 pm **Posts:** 14

is there anyway you can post your build file? I have all the jars but I think something in my build.xml is not working correctly.

thanks,

Khalid

jefmsmit · **Joined:** Mon Dec 12, 2005 6:00 pm **Posts:** 11

I'm using maven 2. I wrote a simple shell script that primes the local maven repository with the versions of the jars that weren't available yet from ibiblio. Then made dependencies on them in my pom.xml so they get included in the war. Its not the most elegant solutions, but I didn't want to set up a maven repository.

pom.xml

Code:

<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>foo</groupId>

    <artifactId>foo</artifactId>

    <version>1.0-SNAPSHOT</version>

    <name>Foo Web Application</name>

    <packaging>war</packaging>

    <build>
        <defaultGoal>war:inplace</defaultGoal>

        <plugins>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.5</source>
                    <target>1.5</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.codehaus.cargo</groupId>
                <artifactId>cargo-maven2-plugin</artifactId>
                <configuration>
                    <container>
                        <containerId>tomcat5x</containerId>
                        <zipUrlInstaller>
                            <url>http://www.apache.org/dist/tomcat/tomcat-5/v5.5.16/bin/apache-tomcat-5.5.16.zip</url>
                        </zipUrlInstaller>
                    </container>
                    <configuration>
                        <home>${project.build.directory}/tomcat5x</home>
                        <deployables>
                            <deployable>
                                <location>${basedir}/src/main/webapp</location>
                            </deployable>
                        </deployables>
                    </configuration>
                </configuration>
                <executions>
                    <execution>
                        <id>start-container</id>
                        <phase>pre-integration-test</phase>
                        <goals>
                            <goal>start</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>stop-container</id>
                        <phase>post-integration-test</phase>
                        <goals>
                            <goal>stop</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

        </plugins>
    </build>

    <dependencies>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.9</version>
        </dependency>

        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>ejb</artifactId>
            <version>3.0</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate</artifactId>
            <version>3.2.0.cr1</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-annotations</artifactId>
            <version>3.1beta9</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>3.1beta7</version>
        </dependency>

        <!-- Hibernate Dependencies -->
        <dependency>
            <groupId>antlr</groupId>
            <artifactId>antlr</artifactId>
            <version>2.7.6rc1</version>
        </dependency>

        <dependency>
            <groupId>asm</groupId>
            <artifactId>asm</artifactId>
            <version>2.2</version>
        </dependency>

        <dependency>
            <groupId>asm</groupId>
            <artifactId>asm-attrs</artifactId>
            <version>2.2</version>
        </dependency>

        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.0</version>
        </dependency>

        <dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib</artifactId>
            <version>2.1_3</version>
        </dependency>

        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>2.1.1</version>
        </dependency>

        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6.1</version>
        </dependency>

        <dependency>
            <groupId>ehcache</groupId>
            <artifactId>ehcache</artifactId>
            <version>1.1</version>
        </dependency>

        <dependency>
            <groupId>jta</groupId>
            <artifactId>jta</artifactId>
            <version>unknown</version>
        </dependency>

        <!-- End Hibernate Dependecies -->

        <!-- Hibernate Entity Manager Dependencies -->

        <dependency>
            <groupId>javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.1</version>
        </dependency>

        <dependency>
            <groupId>org.jboss</groupId>
            <artifactId>jboss-archive-browsing</artifactId>
            <version>5.0.0alpha</version>
        </dependency>

        <!-- End Hibernate Entity Manager Dependencies -->

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.4</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.1.2</version>
        </dependency>

        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring</artifactId>
            <version>1.2.6</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-mock</artifactId>
            <version>1.2.6</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.0.4</version>
        </dependency>

        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.1</version>
        </dependency>

        <dependency>
            <groupId>opensymphony</groupId>
            <artifactId>sitemesh</artifactId>
            <version>2.2.1</version>
        </dependency>

        <dependency>
            <groupId>jmock</groupId>
            <artifactId>jmock</artifactId>
            <version>1.0.1</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.postgres</groupId>
            <artifactId>jdbc</artifactId>
            <version>8.1</version>
        </dependency>
    </dependencies>

</project>

Shell script:

Code:

#!/bin/sh

mvn install:install-file -Dfile=lib/javax/persistence/ejb/3.0/ejb3-persistence.jar -DgroupId=javax.persistence -DartifactId=ejb -Dversion=3.0 -Dpackaging=jar -DgeneratePom=true
mvn install:install-file -Dfile=lib/org/hibernate/hibernate-annotations/3.1beta9/hibernate-annotations.jar -DgroupId=org.hibernate -DartifactId=hibernate-annotations -Dversion=3.1beta9 -Dpackaging=jar -DgeneratePom=true
mvn install:install-file -Dfile=lib/org/hibernate/hibernate-entitymanager/3.1beta7/hibernate-entitymanager.jar -DgroupId=org.hibernate -DartifactId=hibernate-entitymanager -Dversion=3.1beta7 -Dpackaging=jar -DgeneratePom=true
mvn install:install-file -Dfile=lib/org/hibernate/hibernate/3.2.0.cr1/hibernate3.jar -DgroupId=org.hibernate -DartifactId=hibernate -Dversion=3.2.0.cr1 -Dpackaging=jar -DgeneratePom=true
mvn install:install-file -Dfile=lib/org/postgresql/jdbc/8.1/postgresql-jdbc-8.1.jar -DgroupId=org.postgres -DartifactId=jdbc -Dversion=8.1 -Dpackaging=jar -DgeneratePom=true
mvn install:install-file -Dfile=lib/jta/jta/unknown/jta.jar -DgroupId=jta -DartifactId=jta -Dversion=unknown -Dpackaging=jar -DgeneratePom=true
mvn install:install-file -Dfile=lib/javassist/javassist/3.1/javassist.jar -DgroupId=javassist -DartifactId=javassist -Dversion=3.1 -Dpackaging=jar -DgeneratePom=true
mvn install:install-file -Dfile=lib/org/jboss/jboss-archive-browsing/5.0.0alpha/jboss-archive-browsing.jar -DgroupId=org.jboss -DartifactId=jboss-archive-browsing -Dversion=5.0.0alpha -Dpackaging=jar -DgeneratePom=true

Code: