Friday, 28 August 2009

Maven GWT WAR JPA Jetty & Derby skeleton project.

Thats right, all that good stuff in one skeleton project.

Here is the pom.xml for the project:

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/maven-v4_0_0.xsd">

  <modelVersion>4.0.0</modelVersion>
  <groupId>org.adrianwalker.maven.skeleton.war.jpa.gwt</groupId>
  <artifactId>maven-war-gwt-jpa-derby-skeleton</artifactId>
  <packaging>war</packaging>
  <version>0.1.0</version>
  <name>Maven WAR-GWT-JPA-Derby Skeleton</name>

  <description>
    Skeleton project for creating GWT WAR running on Jetty, with a Derby
    database accessed through JPA.

    Usage: mvn clean install jetty:run-war
  </description>

  <url>http://www.adrianwalker.org</url>

  <organization>
    <name>adrianwalker.org</name>
    <url>http://www.adrianwalker.org</url>
  </organization>

  <developers>
    <developer>
      <name>Adrian Walker</name>
      <email>ady.walker@gmail.com</email>
      <organization>adrianwalker.org</organization>
      <organizationUrl>http://www.adrianwalker.org</organizationUrl>
    </developer>
  </developers>

  <repositories>
    <repository>
      <id>java.net</id>
      <url>http://download.java.net/maven/1</url>
      <layout>legacy</layout>
    </repository>
    <repository>
      <id>codehaus.org</id>
      <url>http://repository.codehaus.org</url>
    </repository>
  </repositories>

  <properties>
    <gwt.version>1.7.0</gwt.version>
  </properties>

  <build>
    <outputDirectory>war/WEB-INF/classes</outputDirectory>

    <resources>
      <resource>
        <directory>${basedir}/src/main/resources</directory>
        <includes>
          <include>**/*</include>
        </includes>
      </resource>
    </resources>

    <plugins>
      <plugin>
        <artifactId>maven-clean-plugin</artifactId>
        <configuration>
          <filesets>
            <fileset>
              <directory>war</directory>
              <includes>
                <include>**/*</include>
              </includes>
            </fileset>
          </filesets>
        </configuration>
      </plugin>

      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>gwt-maven-plugin</artifactId>
        <version>1.1</version>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
            </goals>
          </execution>
        </executions>
      </plugin>

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.0.2</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>maven-jetty-plugin</artifactId>
        <version>6.1.9</version>
      </plugin>
    </plugins>
  </build>
  
  <dependencies>
    <dependency>
      <groupId>com.google.gwt</groupId>
      <artifactId>gwt-servlet</artifactId>
      <version>${gwt.version}</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>com.google.gwt</groupId>
      <artifactId>gwt-user</artifactId>
      <version>${gwt.version}</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>toplink.essentials</groupId>
      <artifactId>toplink-essentials</artifactId>
      <version>2.0-36</version>
    </dependency>
    <dependency>
      <groupId>org.apache.derby</groupId>
      <artifactId>derby</artifactId>
      <version>10.4.2.0</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.4</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>

  <reporting>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-checkstyle-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-javadoc-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>cobertura-maven-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>jxr-maven-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-pmd-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>findbugs-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </reporting>
</project>

The major pain with this was getting a jndi accessible data source working with Jetty and JPA. Check out the persistence.xml and jetty-env.xml for the correct configuration:

jetty-env.xml 

<?xml version="1.0"  encoding="ISO-8859-1"?>
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://jetty.mortbay.org/configure.dtd">
<Configure class="org.mortbay.jetty.webapp.WebAppContext">
  <New id="message" class="org.mortbay.jetty.plus.naming.Resource">
    <Arg>jdbc/message</Arg>
    <Arg>
      <New class="org.apache.derby.jdbc.EmbeddedDataSource">
        <Set name="DatabaseName">target/database/message</Set>
        <Set name="user"></Set>
        <Set name="password"></Set>
        <Set name="createDatabase">create</Set>
      </New>
    </Arg>
  </New>
</Configure>

persistence.xml 

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
  <persistence-unit name="persistenceUnit" transaction-type="RESOURCE_LOCAL">
    <provider>oracle.toplink.essentials.PersistenceProvider</provider>
    <non-jta-data-source>java:comp/env/jdbc/message</non-jta-data-source>
    <class>org.adrianwalker.maven.skeleton.jpa.entity.MessageEntity</class>
    <properties>
      <property name="toplink.ddl-generation" value="create-tables"/>
    </properties>
  </persistence-unit>
</persistence>

Run the project with 'mvn clean install jetty:run-war' and point your brower at http://localhost:8080

Source Code

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