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App Engine, JDO, and Maven. Startup error

I am trying to create a simple test using JDO with App Engine and Maven configuration.

My compilation and data boosting steps succeed. But at runtime (both mvn: test and appengine: devserver) I get:

1) Error in custom provider, javax.jdo.JDOFatalInternalException: 
Class "com.google.appengine.datanucleus.DatastoreManager" was not found in the CLASSPATH.
Please check your specification and your CLASSPATH.

However, my path class (target / demo / WEB-INF / lib) contains: datanucleus-appengine-2.1.1.jar

And my dependencies are the same as in the Google datanucleus POM project:

  <dependency>
    <groupId>javax.jdo</groupId>
    <artifactId>jdo-api</artifactId>
    <version>3.0.1</version>
  </dependency>
  <dependency>
    <groupId>org.datanucleus</groupId>
    <artifactId>datanucleus-core</artifactId>
    <version>[3.1.1, 3.2)</version>
    <scope>runtime</scope>
  </dependency>
  <dependency>
    <groupId>org.datanucleus</groupId>
    <artifactId>datanucleus-api-jdo</artifactId>
    <version>[3.1.1, 3.2)</version>
  </dependency>
  <dependency>
    <groupId>com.google.appengine.orm</groupId>
    <artifactId>datanucleus-appengine</artifactId>
    <version>2.1.1</version>
  </dependency>

Appreciate any suggestions.

RB

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2 answers

Everything works for me now. I thought I would share a couple of gotchas (since it took me several days to plow all this):

1). (, App Engine ORM 2.1.1 DataNucleus 3.1.1 - ).

http://www.datanucleus.org/products/accessplatform_3_2/datastores/appengine.html

:

  <dependency>
    <groupId>javax.jdo</groupId>
    <artifactId>jdo-api</artifactId>
    <version>3.0.1</version>
  </dependency>
  <dependency>
    <groupId>org.datanucleus</groupId>
    <artifactId>datanucleus-core</artifactId>
    <version>3.1.1</version>
    <scope>runtime</scope>
  </dependency>
  <dependency>
    <groupId>org.datanucleus</groupId>
    <artifactId>datanucleus-api-jdo</artifactId>
    <version>3.1.2</version>
  </dependency>
  <dependency>
    <groupId>com.google.appengine.orm</groupId>
    <artifactId>datanucleus-appengine</artifactId>
    <version>2.1.2</version>
  </dependency>

  ...

  <plugin>
    <groupId>org.datanucleus</groupId>
    <artifactId>maven-datanucleus-plugin</artifactId>
    <version>3.1.2</version>
    <configuration>
      <log4jConfiguration>${basedir}/log4j.properties</log4jConfiguration>
      <verbose>false</verbose>
      <fork>false</fork>
    </configuration>
    <executions>
      <execution>
        <phase>process-classes</phase>
        <goals>
          <goal>enhance</goal>
        </goals>
      </execution>
    </executions>
  </plugin>

2). datanucleus.log, , ( mvn datanucleus: ). , ( src/test) .

+7

false pom.xml

<plugins>
            <plugin>
                <groupId>org.datanucleus</groupId>
                <artifactId>maven-datanucleus-plugin</artifactId>
                <version>3.1.2</version>
                <configuration>
                    **<fork>false</fork>**
                    <log4jConfiguration>${basedir}/log4j.properties</log4jConfiguration>
                    <verbose>true</verbose>
                </configuration>
                <executions>
                    <execution>
                        <phase>process-classes</phase>
                        <goals>
                            <goal>enhance</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
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