Declaring a persistent-unit without class in JPA - java

Well, my doubt is very simple but strange for me, because in everywhere i hear: "You must declare all persistent classes in persistent-unit".
I decide don't declare any class in my persistent-unit, just put the default configuration, and my application works fine even now. So, why declare my classes there ?
NOTE:
I don't know if this problem is related with the scneario above, but when i try to load a lazy attribute all fields in this object are NULL and have in attribute "handler" something like: JavaLazyInitializer.
EDIT 1:
This is my persistence.xml
<?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="odontonewPU">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="false" />
<property name="hibernate.hbm2ddl.auto" value="update" />
</properties>
</persistence-unit>
</persistence>
This is my applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<!-- Seta anotaçoes para serem usadas pelo Spring -->
<context:annotation-config />
<!-- Define o pacote onde o Spring vai procurar por beans anotados -->
<context:component-scan
base-package="br.com.odontonew" />
<!-- define que as transaçoes irao ser anotadas -->
<tx:annotation-driven proxy-target-class="true" />
<!-- Configuracao do Banco de Dados -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost/odontonew" />
<property name="username" value="root" />
<property name="password" value="123456" />
</bean>
<!-- Configuracao do Hibernate -->
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="odontonewPU" />
<property name="dataSource" ref="dataSource" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
<property name="showSql" value="true" />
</bean>
</property>
</bean>
<!-- Configuracao do gerente de transacoes do Spring -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
</beans>

You do not have to declare your persistent classes in your persistence.xml, at least not with JPA 2.0. I am not sure about JPA 1.
The provider scans the classes in the persistence root and evaluates the annotations (#Entity, #MappedSuperclass etc) as well as the contents of persistence.xml, so in the end you get a union of both declarations.
From the Pro JPA 2 book:
A managed class will be included if it is among the following:
local classes: annotated classes in the deployment unit in which the persistence.xml was packaged.
classes in mapping files: classes having mapping entries in an XML mapping file
explicitly listed classes: classes that are listed as class elements in the persistence.xml
additional jars of managed classes : annotated classes in a named jar listed in a jar-file element of the persistence.xml file

Related

Running integration tests with Spring boot (NoSuchBeanDefinitionException)

I am trying to sort out the following issue.
I've created a Spring Boot application which is also using Spring Data.
To do integration tests, I want to power up an H2 database.
I configured the test with #ContextConfiguration and referenced my applicationContext.xml file.
When I am running the tests out of the IDE (intelliJ) everything is fine, and the test is getting grean.
But as soon as I run the test on my build server or in the console with gradle, I get NoSuchBeanDefinitionException. It seems like the applicationContext is not considered at all...
Actually I have no clue anymore what to do..
My applicationContext-test.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:data="http://www.springframework.org/schema/data/jpa"
xmlns="http://www.springframework.org/schema/beans"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:annotation-config/>
<context:component-scan base-package="de.company.project"/>
<bean class=
"org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>
<bean class=
"org.springframework.context.annotation.CommonAnnotationBeanPostProcessor"/>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${database.driverClassName}"/>
<property name="url" value="${database.url}"/>
<property name="username" value="${database.username}"/>
<property name="password" value="${database.password}"/>
</bean>
<bean class="org.springframework.orm.jpa.JpaTransactionManager"
id="transactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<bean
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
id="entityManagerFactory">
<property name="persistenceUnitName" value="persistenceUnit"/>
<property name="dataSource" ref="dataSource"/>
<property name="persistenceXmlLocation" value="classpath:META-INF/persistence-
test.xml"/>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="databasePlatform" value="org.hibernate.dialect.H2Dialect"/>
</bean>
</property>
</bean>
</beans>
My persistenc-test.xml:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="persistenceUnit"
transaction-type="RESOURCE_LOCAL">
<class>de.company.project.server.model.Entity</class>
<properties>
<property name="hibernate.hbm2ddl.auto" value="create-drop" />
<property name="hibernate.ejb.naming_strategy"
value="org.hibernate.cfg.ImprovedNamingStrategy" />
<property name="hibernate.connection.charSet" value="UTF-8" />
<property name="hibernate.default_schema" value="public" />
<property name="hibernate.show_sql" value="true" />
</properties>
</persistence-unit>
</persistence>
The database.properties just contains the defaults for an H2 database.
And last but not least my Testclass
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration("classpath:*META-INF/applicationContext-test.xml")
public class EntityServiceTest {
#Test
public void doSomeStuff(){
}
.
.
}
I hope somebody has a clue what I am doing wrong?!
BR
Edit:
Missed to add the exception and the respository:
#Repository
public interface EntityRepository extends JpaRepository<Entity, Integer> {
}
Exception:
Caused by:
org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying
bean of type [de.company.project.server.dao.EntityRepository] found for dependency:
expected at least 1 bean which qualifies as autowire candidate for this dependency.
Dependency annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
I fixed it by adding TransactionalTestExecutionListener.class to my TestExecutionListeners.
I think the #Repository annotation should be on the implementation and not the interface. I assume you have this interface #Autowired somewhere else. Spring needs to know which concrete class should be used.
Also, the config file may not be found on the classpath with unit tests. Place the test context config in src/test/resources and change the configuration annotation to:
#ContextConfiguration(locations = "classpath:/applicationContext-test.xml")
See this answer (and others for the same question) for more info: https://stackoverflow.com/a/4377840/3851006

Setting FlushMode.COMMIT in Spring

I would like set my Hibernate/JPA FlushMode to COMMIT, but in configuration file (applicationContenxt.xml is one of my files), i have a entityManager in my DAO, but i don't know how to set this in configuration file.
So, this is my applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<!-- Seta anotaçoes para serem usadas pelo Spring -->
<context:annotation-config />
<!-- Define o pacote onde o Spring vai procurar por beans anotados -->
<context:component-scan
base-package="br.com.sender" />
<!-- define que as transaçoes irao ser anotadas -->
<tx:annotation-driven proxy-target-class="true" />
<!-- Configuracao do Banco de Dados -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.postgresql.Driver" />
<property name="url" value="jdbc:postgresql://localhost/sender" />
<property name="username" value="postgres" />
<property name="password" value="pgadmin" />
</bean>
<!-- Configuracao do Hibernate -->
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="senderPU" />
<property name="dataSource" ref="dataSource" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="databasePlatform" value="org.hibernate.dialect.PostgreSQLDialect" />
<property name="showSql" value="true" />
</bean>
</property>
</bean>
<!-- Configuracao do gerente de transacoes do Spring -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
</beans>
EDIT 1:
I tried the following in applicationContext.xml
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="jpaDialect">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect">
<property name="flushMode" value="COMMIT"/>
</bean>
</property>
Tomcat error:
aused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'flushMode' of bean class [org.springframework.orm.jpa.vendor.HibernateJpaDialect]: Bean property 'flushMode' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:1052)
at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:921)
at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:76)
at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:58)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1358)
... 53 more
SOLUTION:
After a lot of research, i found a solution. I setted the FlushMode in #PersistenceContext in my BasicDAO class. Look:
#PersistenceContext(type = javax.persistence.PersistenceContextType.EXTENDED,
properties = #PersistenceProperty(name="org.hibernate.flushMode", value="COMMIT"))
protected EntityManager entityManager;
This works fine. I removed all #Transactional annotation from my "find" functions, because with #Transactional the "COMMIT" are fired and flush too.

Using Multiple Entity managers in DAO

I'm trying to configure Spring+Hibernate+JPA for work with two databases ( one for write only i.e insertion & updation & other is only for retrieval.
I did some research & found these possible solutions:
http://www.studytrails.com/frameworks/spring/spring-hibernate-jpa.jsp
Multiple database with Spring+Hibernate+JPA
How do I connect to multiple databases using JPA?
But I stuck at one place & getting this error
No qualifying bean of type [javax.persistence.EntityManagerFactory] is defined: expected single matching bean but found 2: entityManagerFactoryReadOnly,entityManagerFactoryWriteOnly
What am I doing wrong ?
persistent.read.only.xml:
<?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="readOnly" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.demo.domain.Contact</class>
</persistence-unit>
</persistence>
persistent.write.only.xml:
<?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="writeOnly" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.demo.domain.Contact</class>
</persistence-unit>
</persistence>
mcv-dispatcher-servlet.xml:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:lang="http://www.springframework.org/schema/lang" xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"
xmlns:oxm="http://www.springframework.org/schema/oxm"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-3.2.xsd">
<!-- Activates various annotations to be detected in bean classes -->
<context:annotation-config />
<!-- Scans the classpath for annotated components that will be auto-registered
as Spring beans. For example #Controller and #Service. Make sure to set the
correct base-package -->
<context:component-scan base-package="com.demo" />
<!-- Setup a simple strategy: 1. Take all the defaults. 2. Return XML by
default when not sure. -->
<!-- Total customization - see below for explanation. -->
<bean id="cnManager"
class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
<property name="favorPathExtension" value="true" />
<property name="ignoreAcceptHeader" value="true" />
<property name="defaultContentType" value="application/json" />
<property name="useJaf" value="false" />
<property name="mediaTypes">
<map>
<entry key="json" value="application/json" />
<entry key="xml" value="application/xml" />
</map>
</property>
</bean>
<!-- Make this available across all of Spring MVC -->
<mvc:annotation-driven
content-negotiation-manager="cnManager" />
<bean class="com.demo.view.MvcConfiguringPostProcessor" />
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
p:location="/WEB-INF/jdbc.properties" />
<!-- ******************************************************************** -->
<!-- START: Multiple C3P0 data-sources for DB instance -->
<!-- ******************************************************************** -->
<!-- https://stackoverflow.com/questions/12922351/can-i-use-multiple-c3p0-datasources-for-db-instance -->
<!-- Using Apache DBCP Data Sources -->
<bean id="dataSource"
abstract="true" >
<property name="driverClass" value="${db.driverClassName}" />
<property name="user" value="${db.username}" />
<property name="password" value="${db.password}" />
<property name="idleConnectionTestPeriod" value="${db.idleConnectionTestPeriod}" />
<property name="preferredTestQuery" value="select 1" />
<property name="testConnectionOnCheckin" value="true" />
</bean>
<bean id="dataSourceReadOnly"
parent="dataSource"
class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="jdbcUrl" value="${db.readOnlyDataBaseUrl}" />
</bean>
<bean id="dataSourceWriteOnly"
parent="dataSource"
class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="jdbcUrl" value="${db.writeOnlyDataBaseUrl}" />
</bean>
<!-- ******************************************************************** -->
<!-- END: Multiple C3P0 data-sources for DB instance -->
<!-- ******************************************************************** -->
<bean id="jpaVendorProvider"
class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="database" value="MYSQL" />
<property name="databasePlatform" value="${db.dialect}" />
<property name="showSql" value="true" />
<property name="generateDdl" value="true" />
</bean>
<!-- <bean -->
<!-- class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"> -->
<!-- <property name="defaultPersistenceUnitName" value="readOnly" /> -->
<!-- </bean> -->
<bean id="persistenceUnitManager"
class="org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager">
<!-- defining multiple persistence unit -->
<property name="persistenceXmlLocations">
<list>
<value>/META-INF/persistence.read.only.xml</value>
<value>/META-INF/persistence.write.only.xml</value>
</list>
</property>
<property name="defaultDataSource" ref="dataSourceReadOnly" />
<property name="dataSources">
<map>
<entry key="readOnlyDsKey" value-ref="dataSourceReadOnly" />
<entry key="writeOnlyDsKey" value-ref="dataSourceWriteOnly" />
</map>
</property>
</bean>
<bean id="entityManagerFactoryReadOnly"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<!-- <property name="dataSource" ref="dataSourceReadOnly" /> -->
<property name="persistenceUnitManager" ref="persistenceUnitManager" />
<property name="jpaVendorAdapter" ref="jpaVendorProvider" />
<property name="persistenceUnitName" value="readOnly" />
<!-- entityManagerFactory does not specify persistenceUnitName property
because we're defining more than one persistence unit -->
<!-- <property name="persistenceUnitName" value="hello_mysql" /> -->
<!-- <property name="persistenceXmlLocation" value="/META-INF/persistence.xml" /> -->
</bean>
<bean id="entityManagerFactoryWriteOnly"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<!-- <property name="dataSource" ref="dataSourceWriteOnly" /> -->
<property name="persistenceUnitManager" ref="persistenceUnitManager" />
<property name="jpaVendorAdapter" ref="jpaVendorProvider" />
<property name="persistenceUnitName" value="writeOnly" />
</bean>
<!-- ******************************************************************** -->
<!-- Mark bean transactions as annotation driven -->
<!-- ******************************************************************** -->
<tx:annotation-driven transaction-manager="transactionManagerReadOnly" />
<tx:annotation-driven transaction-manager="transactionManagerWriteOnly" />
<!-- ******************************************************************** -->
<!-- Setup the transaction manager -->
<!-- ******************************************************************** -->
<bean id="transactionManagerReadOnly" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactoryReadOnly" />
</bean>
<bean id="transactionManagerWriteOnly" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactoryWriteOnly" />
</bean>
</beans>
My DAO:
package com.demo.dao;
import java.util.Collections;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import com.demo.domain.Contact;
//import java.util.Collections;
#Repository("ContactDAO")
#Transactional
public class ContactDAOImpl extends AppDAOimpl<Contact> implements ContactDAO {
/**
*
*/
private static final long serialVersionUID = 3986253823316728444L;
/**
* EntityManager injected by Spring for persistence unit MYSQL
*
*/
#PersistenceContext(unitName = "readOnly")
#Qualifier("entityManagerFactoryReadOnly")
private EntityManager entityManager;
/**
* Get the entity manager that manages persistence unit MYSQL
*
*/
public EntityManager getEntityManager() {
return entityManager;
}
/**
* EntityManager injected by Spring for persistence unit MYSQL
*
*/
#PersistenceContext(unitName = "writeOnly")
#Qualifier("entityManagerFactoryWriteOnly")
private EntityManager woEntityManager;
/**
* Get the entity manager that manages persistence unit MYSQL
*
*/
public EntityManager getWoEntityManager() {
return woEntityManager;
}
// other functions goes here
}
Both the databases have the same schema ( read & write ).
We have a similar setup in a project here, and I think
#PersistenceContext(unitName = "writeOnly")
private EntityManager woEntityManager;
is sufficient, you don't need the additional Qualifier. But in my experience, you have to set the attribute on Transactional, too. So drop the Transactional annotation on the DAO class and start marking individual methods with
#Transactional(value="transactionManagerReadOnly")
and i believe the tx:annotation-driven element in the context doesn't work with multiple contexts, too.
And ideally, the whole stuff belongs into the service layer anyway, you don't want your DAOs to decide or even know which Persistence context they're called from. So you'd have a ReadContactService:
#PersistenceContext(unitName = "readOnly")
private EntityManager em;
#Transactional(value="transactionManagerReadOnly")
public Contact readContact(int id) {
return dao.findById(em, id);
}
and a WriteContactService:
#PersistenceContext(unitName = "writeOnly")
private EntityManager em;
#Transactional(value="transactionManagerWriteOnly")
public void writeContact(String name, String address) {
return dao.writeContact(em, name, address);
}
and a DAO that is unaware of the context. Then you need only N entity classes and you can reuse DAO methods (even writeOnly will eventually have to read from the database, trust me).
JTA transaction manager. is answer to my question. Below are links for references.
JPA Multiple Transaction Managers
Spring multiple #Transactional datasources
& here is nice tutorial about integrating JTA with spring.
http://www.javacodegeeks.com/2013/07/spring-jta-multiple-resource-transactions-in-tomcat-with-atomikos-example.html
Add two classes
ContactWrite.java
on top declare the schema and table like below
#Table(name = "Contact", schema="DB1")
Do the same for the other table in the DB2
ContactRead.java
#Table(name = "Contact", schema="DB2")
Now use these two classes in the persistance xml files like below.
persistent.read.only.xml:
<?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="readOnly" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.demo.domain.ContactWrite</class>
</persistence-unit>
</persistence>
persistent.write.only.xml:
<?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="writeOnly" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.demo.domain.ContactRead</class>
</persistence-unit>
</persistence>

EntityManager and persist method not working properly

I'm in trouble here..
I'm new using Spring + Hibernate in a Java SE application...
I'm trying to instantiate the entityManager, but it's not working
I'm using the annotation #PersistenceUnit, like this:
#PersistenceUnit
public void setEmf(EntityManager emf) {
this.emf = emf;
}
And it works "fine", but it doesn't persist =/
When I change to
#PersistenceContext
public void setEmf(EntityManager emf) {
this.emf = emf;
}
It came out the following error:
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'daoAbstract' defined in class path resource [applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type '$Proxy10 implementing org.hibernate.ejb.HibernateEntityManagerFactory,org.springframework.orm.jpa.EntityManagerFactoryInfo' to required type 'javax.persistence.EntityManager' for property 'emf'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [$Proxy10 implementing org.hibernate.ejb.HibernateEntityManagerFactory,org.springframework.orm.jpa.EntityManagerFactoryInfo] to required type [javax.persistence.EntityManager] for property 'emf': no matching editors or conversion strategy found
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:532)
Here's my applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">
<bean id="ConfiguradorDePropriedades"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<description>The service properties file</description>
<property name="location" value="file:AppConfig.properties" />
</bean>
<bean
class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<!-- <property name="persistenceUnitName" value="ChatJpa" /> -->
<property name="persistenceXmlLocation" value="classpath:persistence.xml" />
<property name="dataSource" ref="dataSourceLocal" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="database" value="${database}" />
<property name="showSql" value="false" />
<property name="generateDdl" value="true" />
</bean>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="dataSourceLocal"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.user}" />
<property name="password" value="${jdbc.pass}" />
</bean>
<bean id="daoAbstract" class="com.planner.pvc.dao.DaoAbstract">
<property name="emf" ref="entityManagerFactory" />
</bean>
<bean id="clienteDao" class="com.planner.pvc.dao.ClienteDaoImpl">
</bean>
<bean id="pvcMainController" class="com.planner.pvc.controller.PVCMainController">
<property name="dao" ref="clienteDao" />
</bean>
</beans>
And 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="ChatJpa">
<properties>
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.connection.driver_class" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
<!-- <property name="hibernate.cache.provider_class" value="net.sf.ehcache.hibernate.EhCacheProvider" />
<property name="hibernate.cache.use_query_cache" value="true" />
<property name="hibernate.hbm2ddl.auto" value="update" /> -->
</properties>
</persistence-unit>
</persistence>
Any help would be appreciated.
Thanks
This line is the problem:
<bean id="daoAbstract" class="com.planner.pvc.dao.DaoAbstract">
<property name="emf" ref="entityManagerFactory" />
</bean>
Instead of doing this, let Spring inject the emf field annotated with #PersistenceContext, this will happen if you have a <context:component-scan.../> or <context:annotation-config/> tags in your application context or just add the latter.

How to get automatic table creation working in spring / hibernate / jpa?

I can't get automatic table creation working in spring when using hibernate / jpa.
Here are my config files:
<?xml version="1.0" encoding="UTF-8"?>
<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_1_0.xsd"
version="1.0">
<persistence-unit name="naveroTest">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>xxx</class>
...
<properties>
<property name="hibernate.archive.autodetection" value="class, hbm"/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcDriver"/>
<property name="hibernate.connection.url" value="jdbc:hsqldb:file:/tmp/naveroTestDB"/>
<property name="hibernate.connection.username" value="sa"/>
<property name="hibernate.connection.password" value=""/>
<property name="hibernate.hbm2ddl.auto" value="create"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>
</properties>
</persistence-unit>
</persistence>
context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:tx="http://www.springframework.org/schema/tx"
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-2.0.4.xsd">
<!-- For auto creation of tables -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.hsqldb.jdbcDriver" />
<property name="url" value="jdbc:hsqldb:file:/tmp/naveroTestDB" />
<property name="username" value="sa" />
<property name="password" value="" />
</bean>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="loadTimeWeaver">
<bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
</property>
<property name="jpaVendorAdapter">
<bean id="jpaAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="generateDdl" value="true" />
<property name="databasePlatform" value="org.hibernate.dialect.HSQLDialect" />
<property name="showSql" value="true" />
</bean>
</property>
</bean>
<bean id="PictureBean" class="de.navero.server.bl.PictureBean">
<property name="entityManagerFactory"><ref local="entityManagerFactory" /></property>
</bean>
</beans>
Any ideas what may be wrong?
Thanks for any help :).
try the following:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="naveroTest" transaction-type="RESOURCE_LOCAL" />
</persistence>
<?xml version="1.0" encoding="UTF-8"?>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
</property>
<property name="jpaProperties">
<props>
...
<prop key="hibernate.hbm2ddl.auto">create-drop</prop>
</props>
</property>
<property name="dataSource" ref="dataSource" />
</bean>
This works for me.
I had exactly the same issue...
Commenting out property
<!--property name="generateDdl" value="true"--> in the JpaAdapter,
but setting
<property name="hibernate.hbm2ddl.auto" value="create"/> in persistence.xml
worked for me. I am using hsqldb.
I noticed in the logs that the mode was beign set to update no matter what I set in
persistence.xml.
The value in persistence.xml was actually picked up but never applied.
I am using Spring 3.0.6 and Hibernate 4
Can you try changing the generateDdl property to false on HibernateJpaVendorAdapter in your spring config file.
Seems to conflict with the hibernate hibernate.hbm2ddl.auto property
See https://jira.springframework.org/browse/SPR-6836 for more info.
In My hibernate-default.cfg.xml i used
<property name="hibernate.hbm2ddl.auto">update</property>
and it worked perfectly, so the config file was as follows
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="current_session_context_class">thread</property>
<!-- When an HQL statement declares a true/false, replace with the standard Y/N -->
<property name="hibernate.query.substitutions">true 'Y', false 'N'</property>
<!-- A useful property do debugging queries. Besure sure it is false or commented out when going PROD -->
<!-- <property name="hibernate.show_sql">true</property> -->
<!-- Format the printed out SQL generated by Hibernate -->
<property name="hibernate.format_sql">false</property>
<!-- If enabled, Hibernate will collect statistics useful for performance tuning - JMX -->
<property name="hibernate.generate_statistics">false</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<mapping class=....
sadly both solutions didn't work for me :(. "hibernate.hbm2ddl.auto=update" would be also ok, as it should create the tables if they're not present.
It seems that all property settings from the persistence.xml are recognized as username and database provider are set correctly. Sadly the tables aren't created at startup which causes my testcase to fail as the SELECT statement throws an error ...
As you can see, I've set the connection url to use a local file database, which allows me to review the database log after the test run. But the log file is still empty after the test run, even no error is written to it :(.
This worked for me
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.hsqldb.jdbcDriver" />
<property name="url" value="jdbc:hsqldb:mem://productDb" />
<property name="username" value="sa" />
<property name="password" value="" />
</bean>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="generateDdl" value="true" />
<property name="showSql" value="true" />
</bean>
</property>
If I change value to false like this<property name="generateDdl" value="false" /> then I get SqlExceptionHelper:144 - Table not found in statement
Maybe to late, but today I had the same problem when I was writing some tests for a legacy app.
I was using spring 2.5, hibernate3, and HSQL database.
To solve it I changed the database from HSQL to H2 and the datasource from org.springframework.jdbc.datasource.DriverManagerDataSource to org.apache.commons.dbcp.BasicDataSource.
The spring-context.xml looks like:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="org.h2.Driver"/>
<property name="url" value="jdbc:h2:mem:test"/>
<property name="username" value="sa"/>
<property name="password" value=""/>
</bean>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
</property>
<property name="dataSource" ref="dataSource"/>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="dataSource" ref="dataSource"/>
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<tx:annotation-driven/>
...
</beans>
The persistence.xml looks like:
<?xml version="1.0" encoding="UTF-8"?>
<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_1_0.xsd"
version="1.0">
<persistence-unit name="TestPU" transaction-type="RESOURCE_LOCAL">
<properties>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/>
</properties>
</persistence-unit>
</persistence>
I hope it helps.
In my case, the tables were not been created because the objects annotated with #Table where not annotated as #Entity

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