Where to put persistence.xml in gwt maven MultiModule project? - maven

Question

I have project with one parent maven module and three submodules:
server
shared
web
Here is main project (aka parent) pom.xml file:
<?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>
<groupId>pl.derp</groupId>
<artifactId>parent</artifactId>
<packaging>pom</packaging>
<version>1.0.0-SNAPSHOT</version>
<modules>
<module>server</module>
<module>shared</module>
<module>web</module>
</modules>
<properties>
<gwtVersion>2.7.0</gwtVersion>
<webappDirectory>${project.build.directory}/${project.build.finalName}</webappDirectory>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<tomcat.webport>8082</tomcat.webport>
<tomcat.ajpport>8182</tomcat.ajpport>
<tomcat.context>/parent</tomcat.context>
</properties>
<dependencies>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-servlet</artifactId>
<version>${gwtVersion}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>${gwtVersion}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
<classifier>sources</classifier>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<defaultGoal>clean install tomcat7:run-war-only</defaultGoal>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>gwt-maven-plugin</artifactId>
<version>${gwtVersion}</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
</plugin>
<!-- IDE -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.7</version> <!-- Note 2.8 does not work with AspectJ aspect path -->
<configuration>
<downloadSources>true</downloadSources>
<downloadJavadocs>false</downloadJavadocs>
<wtpversion>2.0</wtpversion>
<additionalBuildcommands>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>com.google.gdt.eclipse.core.webAppProjectValidator</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>com.google.gwt.eclipse.core.gwtProjectValidator</name>
<arguments>
</arguments>
</buildCommand>
</additionalBuildcommands>
<additionalProjectnatures>
<projectnature>com.google.gwt.eclipse.core.gwtNature</projectnature>
</additionalProjectnatures>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.0</version>
<configuration>
<path>${tomcat.context}</path>
<port>${tomcat.webport}</port>
<ajpPort>${tomcat.ajpport}</ajpPort>
<systemProperties>
<JAVA_OPTS>-XX:MaxPermSize=256m</JAVA_OPTS>
</systemProperties>
</configuration>
</plugin>
</plugins>
</build>
</project>
Here is my whole project structure:
daniel#DK1L:~/git/GWT2.7MavenEclipse/GWT2.7MavenEclipse$ tree
.
├── pom.xml
├── server
│   ├── pom.xml
│   └── src
│      └── main
│      ├── java
│      │   └── pl
│      │   └── derp
│      │   └── server
│      │   └── GreetingServiceImpl.java
│      └── resources
│      ├── META-INF
│      │   └── persistence.xml
│      └── pl
│      └── derp
│      └── server.gwt.xml
├── shared
│   ├── pom.xml
│   └── src
│      └── main
│      ├── java
│      │   └── pl
│      │   └── derp
│      │   ├── shared
│      │   │   └── FieldVerifier.java
│      │   └── web
│      │   ├── GreetingServiceAsync.java
│      │   └── GreetingService.java
│      └── resources
│      └── pl
│      └── derp
│      └── shared.gwt.xml
├── war
│   └── WEB-INF
│   └── web.xml
├── web
│   ├── pom.xml
│   └── src
│      ├── main
│      │   ├── java
│      │   │   └── pl
│      │   │   └── derp
│      │   │   └── web
│      │   │   ├── Messages.java
│      │   │   └── parent.java
│      │   ├── resources
│      │   │   └── pl
│      │   │   └── derp
│      │   │   ├── parent.gwt.xml
│      │   │   └── web
│      │   │   ├── Messages_fr.properties
│      │   │   └── Messages.properties
│      │   └── webapp
│      │   ├── META-INF
│      │   │   └── context.xml
│      │   ├── parent.css
│      │   ├── parent.html
│      │   └── WEB-INF
│      │   └── web.xml
│      └── test
│      ├── java
│      │   └── pl
│      │   └── derp
│      │   └── web
│      │   └── GwtTestparent.java
│      └── resources
│      └── pl
│      └── derp
│      └── parentJUnit.gwt.xml
└── WebContent
└── META-INF
I wonder Where I should put persistence.xml? In what package name, dir and project should I put it?
I use gwt 2.7

Answer 1

If you use a maven structure project, you should put the persistence.xml file into the following directory:
src/main
/java
/com.my.package
/client
/shared
/server
/resources
/META-INF/persistence.xml

Answer 2

According to that documentation
the right place for the persistence.xml would be:
WEB-INF/classes/META-INF.