I tried building my project today and am having problems connecting to MySQL. I am getting an exception : org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] when I try to create my entity manager factory. It was working fine yesterday. I have checked MySql is running and have tried to restart computer but nothing has worked.
Here is my persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="VictoryPU" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>com.stevie.memberfx.model.HouseholdEntity</class>
<class>com.stevie.memberfx.model.MemberEntity</class>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/victorydb?zeroDateTimeBehavior=convertToNull"/>
<property name="javax.persistence.jdbc.user" value="stephen"/>
<property name="javax.persistence.jdbc.driver" value="com.mysql.cj.jdbc.Driver"/>
<property name="javax.persistence.jdbc.password" value="ozzie2014"/>
<property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider"/>
<property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>
<property name="hibernate.show_sql" value="true"/>
</properties>
</persistence-unit>
</persistence>
and my code to create the entity manager factory:
public class JpaUtil {
private static final EntityManagerFactory entityManagerFactory;
static {
try {
entityManagerFactory = Persistence.createEntityManagerFactory("VictoryPU");
} catch (Throwable ex) {
// Log the exception.
System.out.println("Initial EntityManagerFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static EntityManagerFactory getEntityManagerFactory() {
return entityManagerFactory;
}
}
You have to change mysql driver to version 5 and change the driver name in your persistence.xml file to the old name com.mysql.jdbc.Driver
Related
I'm developing a simple application on JAVA EE using JSF, JPA and Maven.
the question is: Why the tomcat servlet on Heroku is returning null on the time to inject a ManagedBean while in Glassfish server everything is fine?
There are my codes:
#ManagedBean(name = "homeBean")
#SessionScoped
public class HomeBean {
//simple properties
#ManagedProperty(value="#{emFactoryBean}")
private EntityManagerFactoryBean factoryBean;
#PostConstruct
public void init(){
sitioService = new SitioService(factoryBean);
sitios = sitioService.getSitios();
}
//Getters and setters
}
The exception occurs when a new instace of SitioService is created, In other words. Here is the factorBean Class:
#ApplicationScoped
public class EntityManagerFactoryBean {
private EntityManagerFactory entityManagerFactory;
public EntityManagerFactoryBean() {
this.entityManagerFactory = Persistence.
createEntityManagerFactory("prueba");
}
//getter and setter
}
My persistence.xml is:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="prueba" transaction-type="RESOURCE_LOCAL">
<class>com.sertracen.sivt.modelo.Imagen</class>
<class>com.sertracen.sivt.modelo.Review</class>
<class>com.sertracen.sivt.modelo.Sitio</class>
<properties>
<property name="javax.persistence.jdbc.url" value="{url}"/>
<property name="javax.persistence.jdbc.user" value="{usuario}"/>
<property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver"/>
<property name="javax.persistence.jdbc.password" value="{contraseña}"/>
<property name="javax.persistence.schema-generation.database.action" value="create"/>
<property name="javax.persistence.schema-generation.scripts.action" value="create"/>
<property name="eclipselink.ddl-generation" value="create-tables"/>
<property name="eclipselink.ddl-generation.output-mode" value="both"/>
</properties>
</persistence-unit>
Obviously my parameter connections are ok.
Hope for your answers!
Cheers!
----STACK TRACE:
om.sun.faces.mgbean.ManagedBeanCreationException: An error occurred performing resource injection on managed bean homeBean
....
Caused by: java.lang.NullPointerException
at com.sertracen.sivt.negocio.SitioService.<init>(SitioService.java:26)
at com.sertracen.sivt.web.HomeBean.init(HomeBean.java:75)
I have a config file persistence.xml as mentioned below:
<?xml version="1.0" encoding="UTF-8" ?>
<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"
version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">
<persistence-unit name="entity"
transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<validation-mode>NONE</validation-mode>
<properties>
<property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver" />
<property name="javax.persistence.jdbc.url"
value="jdbc:derby:src/test/resources/sql/entityDB;create=true" >
<!-- EclipseLink should create the database schema automatically -->
<property name="eclipselink.ddl-generation" value="create-tables" />
<property name="eclipselink.ddl-generation.output-mode"
value="database" />
<property name="eclipselink.logging.level" value="ALL" />
</properties>
</persistence-unit>
and load persistence code as:
public static void main(String[] args) {
String persistenceUnit = "entity";
Properties pros = new Properties();
pros.setProperty(PersistenceUnitProperties.ECLIPSELINK_PERSISTENCE_XML,
"src/test/resources/META-INF/persistence.xml");
// Get the entity manager for the tests.
entityManagerFactory = Persistence.createEntityManagerFactory(persistenceUnit,pros);
entityManager = entityManagerFactory.createEntityManager();
Query q = entityManager.createQuery("select * from entityTables");
List<Entity> todoList = q.getResultList();
entityManager.close();
}
But when I am calling createEntityManagerFactory I am getting bellow exception:
Exception in thread "main" javax.persistence.PersistenceException:No Persistence provider for EntityManager named entity
How can I fix it?
After <persistence-unit name="entity" transaction-type="RESOURCE_LOCAL">, use the persistence provider name:
<provider>org.hibernate.ejb.HibernatePersistence</provider>
Edit : or put in the classpath of the manifest this packages : - persistence.jar - eclipselink.jar
This is the (bottom) error from the stack trace:
Caused by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName null
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.init(EntityManagerWrapper.java:138)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper._getDelegate(EntityManagerWrapper.java:171)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.createQuery(EntityManagerWrapper.java:477)
...
The code is as follows (inspired by a #BalusC's example I found on SO today):
#Stateless
public class GradService {
#PersistenceContext
private EntityManager em;
public List<Grad> listAll() {
return em.createQuery("SELECT g FROM Grad g", Grad.class).getResultList();
}
}
As reference, this is my persistence.xml (webmodule-root:Configuration files:WEB-INFMETA-INF:persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="MojaPU" transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>jdbc/ekstraResource</jta-data-source>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
</properties>
</persistence-unit>
</persistence>
It seems, that you placed your persistence.xml file in wrong location. It should by located in /META-INF/ folder and not in WEB-INF.
Background
Plain old Java application, no web servers attached (not even JBoss), is using JPA to query a database.
Problem
The JDBC password is exposed in persistence.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="PU" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:postgresql:DATABASE"/>
<property name="javax.persistence.jdbc.user" value="USERNAME"/>
<property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver"/>
<property name="javax.persistence.jdbc.password" value="PASSWORD"/>
<property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider"/>
<property name="hibernate.hbm2ddl.auto" value="validate"/>
</properties>
</persistence-unit>
</persistence>
Idea
It might be possible to instantiate a JNDI subcontext to set the password within the application's main method. This would possibly permit using a JTA data source:
<persistence 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"
version="2.0">
<persistence-unit name="PU" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:/DefaultDS</jta-data-source>
<properties>
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
</properties>
</persistence-unit>
</persistence>
Question
How would you externalize the password such that it no longer exists inside persistence.xml?
Note: persistence.xml is stored in a public repository, so it would be nice if the password wasn't screaming 'please hack me'. Instead, the JDBC connection information should be in a file that doesn't get checked into the repository.
The password can be externalized by overriding the properties when instantiating the EntityManagerFactory:
private EntityManagerFactory getEntityManagerFactory() {
return Persistence.createEntityManagerFactory( getPersistenceUnitName(),
getProperties() );
}
private Map getProperties() {
Map result = new HashMap();
// Read the properties from a file instead of hard-coding it here.
// Or pass the password in from the command-line.
result.put( "javax.persistence.jdbc.password", "PASSWORD" );
return result;
}
I tried to get Spring-MVC, Hibernate, JTA with a Postgres Server to work.
I got most of the stuff working (Read from Db through EntityManager without JTA), but I can't get the transactions to work with JTA.
<?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="defaultPersistenceUnit" transaction-type="JTA">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<jta-data-source>???</jta-data-source>
<class>net.test.test.database.UsersEntity</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" />
<property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/mydb" />
<property name="javax.persistence.jdbc.user" value="postgres"/>
<property name="javax.persistence.jdbc.password" value="validpw"/>
</properties>
</persistence-unit>
If I provide my datasource from my servlet I get an Exception like
DataSourceLookupFailureException: Failed to look up JNDI DataSource with name 'dataSource'
I also found resources saying the datasource should be defined in the application-server (but I am not sure about this one). If it is important I use a Tomcat-server.