Java Odata Tutorial part 3

Hi ! Today we add producer class to our project. Lets start ! 🙂

1. Create package “producer”. Right click on “java” folder, then select New -> Package.
2. Inside package, create producer class named JavaJPAServiceFactory.
3. Fill class by the code bellow.
   
   Java

   package producer; import org.apache.olingo.odata2.jpa.processor.api.ODataJPAContext; import org.apache.olingo.odata2.jpa.processor.api.ODataJPAServiceFactory; import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPARuntimeException; import org.apache.olingo.odata2.jpa.processor.ref.factory.JPAEntityManagerFactory; public class JavaJPAServiceFactory extends ODataJPAServiceFactory { private static final String PUNIT_NAME = "odataJPAService"; @Override public ODataJPAContext initializeODataJPAContext() throws ODataJPARuntimeException { ODataJPAContext oDataJPAContext = getODataJPAContext(); oDataJPAContext.setEntityManagerFactory(JPAEntityManagerFactory .getEntityManagerFactory(PUNIT_NAME)); oDataJPAContext.setPersistenceUnitName(PUNIT_NAME); return oDataJPAContext; } }

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   package producer;   import org.apache.olingo.odata2.jpa.processor.api.ODataJPAContext; import org.apache.olingo.odata2.jpa.processor.api.ODataJPAServiceFactory; import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPARuntimeException; import org.apache.olingo.odata2.jpa.processor.ref.factory.JPAEntityManagerFactory;   public class JavaJPAServiceFactory extends ODataJPAServiceFactory {     private static final String PUNIT_NAME = "odataJPAService";       @Override     public ODataJPAContext initializeODataJPAContext()             throws ODataJPARuntimeException {         ODataJPAContext oDataJPAContext = getODataJPAContext();         oDataJPAContext.setEntityManagerFactory(JPAEntityManagerFactory                 .getEntityManagerFactory(PUNIT_NAME));         oDataJPAContext.setPersistenceUnitName(PUNIT_NAME);         return oDataJPAContext;     }   }

4. Create new package “resources” in main package.
5. Inside package create persistence.xml file.
6. Fill file by code bellow.
   
   XHTML

   <?xml version="1.0" encoding="UTF-8"?> <persistence version="2.0" 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_2_0.xsd"> <persistence-unit name="odataJPAService" transaction-type="RESOURCE_LOCAL"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <class>model.Address</class> <class>model.Parcel</class> <class>model.Warehouse</class> <exclude-unlisted-classes>true</exclude-unlisted-classes> <properties> <property name="javax.persistence.jdbc.user" value=""/> <property name="javax.persistence.jdbc.password" value=""/> <property name="javax.persistence.jdbc.url" value=""/> <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/> <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> <property name="hibernate.max_fetch_depth" value="3"/> <property name="hibernate.show_sql" value="true"/> <property name="hibernate.format_sql" value="true"/> </properties> </persistence-unit> </persistence>

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   <?xml version="1.0" encoding="UTF-8"?> <persistence version="2.0"              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_2_0.xsd">     <persistence-unit name="odataJPAService"                       transaction-type="RESOURCE_LOCAL">         <provider>org.hibernate.ejb.HibernatePersistence</provider>         <class>model.Address</class>         <class>model.Parcel</class>         <class>model.Warehouse</class>         <exclude-unlisted-classes>true</exclude-unlisted-classes>         <properties>             <property name="javax.persistence.jdbc.user"       value=""/>             <property name="javax.persistence.jdbc.password"   value=""/>             <property name="javax.persistence.jdbc.url"        value=""/>             <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>             <property name="hibernate.dialect"                 value="org.hibernate.dialect.MySQLDialect"/>             <property name="hibernate.max_fetch_depth"         value="3"/>             <property name="hibernate.show_sql" value="true"/>             <property name="hibernate.format_sql" value="true"/>           </properties>     </persistence-unit> </persistence>

7. Click on create JPA facet and add file to its configuration.

It’s all today. In next part we try to make annotations and run our project.