I was trying to run a simple EJB example using WildFly and Maven, but stuck on the stage, where I supposed to create a persistence unit. So, I've created a PostgreSQL database, configured Wildfly datasource and written a persistence.xml file. But It seems like WAR never includes persistence.xml, so everytime I try to create an EntityManager I get the following info and error from Wildfly:
11:55:57,664 INFO [org.hibernate.jpa.boot.internal.PersistenceXmlParser] (default task-1) HHH000318: Could not find any META-INF/persistence.xml file in the classpath
11:55:57,666 ERROR [io.undertow.request] (default task-1) UT005023: Exception handling request to /StudentInfoAppServer/rest/tutorial/helloworld: org.jboss.resteasy.spi.UnhandledException: javax.persistence.PersistenceException: No Persistence provider for EntityManager named postgres
My persistence.xml is currently under src/META-INF folder (where Idea put it when I created Persistence Unit), but I've also tried:
- src/main/java/META-INF
- src/main/webapp/WEB-INF/classes/META-INF
- src/main/resources/META-INF
persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
<persistence-unit name="postgres">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.dain_torson.appserver.Person</class>
<properties>
<property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/infodb" />
<property name="hibernate.connection.driver_class" value="org.postgresql.Driver" />
<property name="hibernate.connection.username" value="postgres" />
<property name="hibernate.connection.password" value="postgres" />
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
<property name="hibernate.hbm2ddl.auto" value="create-drop" />
</properties>
</persistence-unit>
</persistence>
Person.java
package com.dain_torson.appserver;
import javax.persistence.*;
import java.io.Serializable;
@Entity
@Table(name="persons")
public class Person implements Serializable {
private int id;
private String name;
private String group;
public Person(){
}
//mark id as primary key with autogenerated value
//map database column id with id field
@Id
@GeneratedValue(strategy= GenerationType.IDENTITY)
@Column(name="id")
public int getId() {
return id;
}
@Column(name="surname")
public String getName() {
return name;
}
@Column(name="group_num")
public String getGroup() {
return group;
}
public void setId(int id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
public void setGroup(String group) {
this.group = group;
}
HellWorld.java
package com.dain_torson.appserver;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.Persistence;
import javax.persistence.PersistenceContext;
@Stateless
public class HelloWorld implements HelloWorldInterface
{
private EntityManager entityManager;
public HelloWorld() {
}
@Override
public String helloworld() {
entityManager = Persistence.createEntityManagerFactory("postgres").createEntityManager();
if(entityManager == null) {
return "null";
}
Person person = (Person)entityManager.createQuery("FROM Person").getSingleResult();
return person.getName();
}
}
pom.xml
<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>com.dain_torson.appserver</groupId>
<artifactId>StudentInfoAppServer</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>StudentInfoAppServer Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>3.0.16.Final</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.sun.xml.ws</groupId>
<artifactId>jaxws-rt</artifactId>
<version>2.1.3</version>
</dependency>
<dependency>
<groupId>javax.ejb</groupId>
<artifactId>ejb-api</artifactId>
<version>3.0</version>
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>1.0.2</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>3.3.2.GA</version>
</dependency>
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>jta</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.1-901-1.jdbc4</version>
</dependency>
</dependencies>
<build>
<finalName>StudentInfoAppServer</finalName>
<plugins>
<plugin>
<groupId>org.wildfly.plugins</groupId>
<artifactId>wildfly-maven-plugin</artifactId>
<version>1.0.2.Final</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
<executions>
<execution>
<!-- First step is to disable the default-war build step. -->
<id>default-war</id>
<phase>none</phase>
</execution>
<execution>
<!-- Second step is to create an exploded war. Done in prepare-package -->
<id>war-exploded</id>
<phase>prepare-package</phase>
<goals>
<goal>exploded</goal>
</goals>
<configuration>
<webResources>
<resource>
<directory>src/main/resources/META-INF </directory>
<targetPath>WEB-INF/classes/META-INF</targetPath>
<filtering>true</filtering>
<includes>
<include>**/persistence.xml</include>
</includes>
</resource>
</webResources>
</configuration>
</execution>
<execution>
<!-- Last step is to make sure that the war is built in the package phase -->
<id>custom-war</id>
<phase>package</phase>
<goals>
<goal>war</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
I've been struggling with this for few days, so any help will be appreciated.
<scope>provided</scope>as the container will add those as needed. – James R. Perkins