I am using JPA with EclipseLink for PostGreSQL. Due to some product requirement I want to switch the schema runtime. I am planning to do it in "customize" method of SessionCustomizer as shown below
#Override
public void customize(Session session) throws Exception {
System.out.println("calling customize ###################");
if (this.schemaName != null || !this.schemaName.isEmpty()) {
session.getLogin().setTableQualifier(schemaName);
}
I set MySessionCustomizer in peristence.xml.
But don't know when and who will call MySessionCustomizer's customize method.
Please help me to understand this.
EDIT:
Here is my persistence.xml
<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="test" >
<class>com.demo.Student</class>
<properties>
<property name="eclipselink.session.customizer" value="com.demo.MySessionCustomizer"/>
<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="username" />
<property name="javax.persistence.jdbc.password" value="password" />
<property name="eclipselink.ddl-generation" value="create-tables" />
<property name="eclipselink.ddl-generation.output-mode" value="database" />
</properties>
</persistence-unit>
</persistence>
I am able to connect to the database using this persistence.xml and read/write from public schema of the database. However, I want to read and write from different schema and I also want to be able to change the schema at runtime.
I tried using "?currentSchema=MYSCHEMA" in DB URL, but it didn't work.
Related
I'm trying to integrate Spring with JPA. I have defined one entity and added as mapping file under persistence.xml, but it throws the exception
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: MyPersistence] Unable to resolve named mapping-file [net.bb.spring.entities.DealDetailsEntity]
My persistence.xml
<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="MyPersistence">
<description>AS400 Configuration for BB</description>
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<mapping-file>net.bb.spring.entities.DealDetailsEntity</mapping-file>
<properties>
<property name="javax.persistence.jdbc.driver" value="com.ibm.as400.access.AS400JDBCDriver" />
<property name="javax.persistence.jdbc.url" value="jdbc:as400://172.21.100.101/BB" />
<property name="javax.persistence.jdbc.user" value="ROOT" />
<property name="javax.persistence.jdbc.password" value="ROOT" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.hbm2ddl.auto" value="update" />
</properties>
</persistence-unit>
</persistence>
From oracle docs about persistence.xml file:
<mapping-file> element: specifies one or more object-relational
mapping XML files (orm.xml files).
What your <mapping-file> is pointing at is an entity which is a java class. This should not pass to <mapping-file> but to a <class> tag instead.
e.g.
<class>net.bb.spring.entities.DealDetailsEntity</class>
Im trying to configure persistence.xml file which is needed for my EntityManagerFactory. I have created persistence file for MySQL DB a few months ago. But I have a little trouble with Oracle DB.
In MySQL connection I needed MySQL JDBC Connector. It is in Maven repository, so it was easy to fetch it and use. My problem is that I dont know which connector I have to use for connection to Oracle DB. Is that connector in Maven Repository?
Here is my present persistence.xml
<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="oracleTest" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="javax.persistence.jdbc.driver" value="oracle.jdbc.OracleDriver" />
<property name="javax.persistence.jdbc.url" value="jdbc:oracle:thin:#localhost:1521:xe" />
<property name="javax.persistence.jdbc.user" value="library" />
<property name="javax.persistence.jdbc.password" value="" />
<property name="hibernate.dialect" value="org.hibernate.dialect.OracleDialect" />
<property name="hibernate.hbm2ddl.auto" value="create-drop" />
</properties>
</persistence-unit>
</persistence>
I am trying to learn JPA with Hibernate implementation. There are lot of blog of net about this but still i am struggling to implement it. I have written one Dao class which creates the EntityManagerFactory. But while looking this PERSISTENCE_UNIT it says
javax.persistence.PersistenceException: No Persistence provider for EntityManager named test
private final String PERSISTENCE_UNIT = "test";
private EntityManager entityManager;
public GenericDao() {
EntityManagerFactory factory = Persistence
.createEntityManagerFactory(PERSISTENCE_UNIT);
entityManager = factory.createEntityManager();
}
I also created one persistence.xml file which is in META-INF folder of web application. It looks like this.
<?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="test" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:postgres://localhost:1532/test" />
<property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver" />
<property name="javax.persistence.jdbc.user" value="postgres" />
<property name="javax.persistence.jdbc.password" value="postgres" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
<property name="hibernate.hbm2ddl.auto" value="update" />
</properties>
</persistence-unit>
</persistence>
For deployment Tomcat8 is being used. Please let me know why application not able to lookup PERSISTENCE_UNIT.
As per comment - the problem is your persistence.xml location. It needs to be exactly where your application expects it to be:
WEB-INF/classes/META-INF/persistence.xml
Now, why did you encounter this problem is another matter, connected with how you create your .war file. Solution that should work however, is trusting Maven to take care of that. If you set packaging to war, and put your META-INF folder into resources (src/main/resources/META-INF/persistence.xml) it should take care of things.
I'm currently using the JPA specs to query my objects from the database.
Everytime there's a change made by me (my instance of the software), the items would be properly refreshed.
But, if there's another change made by someone else (other instance, or database change), the items are'nt being properly refreshed.
I'm using a simple "find" with "refresh"
Object found = getManager().find(getModelClass(), id);
getManager().refresh(found);
I'm using a DAO Hierarchy, the "getModelClass" returns my #Entity class like
#Override
protected Class<?> getModelClass() {
return ProductCategory.class;
}
And my Manifest / persistence.xml:
<?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="casa" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<!-- localhost -->
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/database" />
<property name="javax.persistence.jdbc.user" value="root" />
<property name="javax.persistence.jdbc.password" value="root" />
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.format_sql" value="false" />
<property name="hibernate.use_sql_comments" value="false" />
<property name="hibernate.jdbc.wrap_result_sets" value="false" />
<property name="hibernate.hibernate.cache.use_query_cache" value="true" />
<property name="hibernate.hbm2ddl.auto" value="update" />
</properties>
</persistence-unit>
</persistence>
Also each "DAO" have and instance of and EntityManager of it's own.
What I might be doing wrong ?
Appreciate the help!
Seems like my problem was simple.
The refresh transaction to be properly refreshed from the database needs to be commited
getManager().getTransaction().begin();
T found = (T) getManager().find(getModelClass(), id);
getManager().refresh(found);
getManager().getTransaction().commit();
I've setted up Hibernate on Glassfish 4.1 but I'm having problems with persistence.
I'm able to read data, but cannot write to BD (changes appear to not be commited).
My current persistent.xml looks like this:
<?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://java.sun.com/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="myPU" transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>jdbc/myDataSource</jta-data-source>
<properties>
<property name="transaction.manager_lookup_class" value="org.hibernate.transaction.SunONETransactionManagerLookup"/>
<property name="hibernate.transaction.factory_class" value="org.hibernate.transaction.CMTTransactionFactory"/>
<property name="hibernate.transaction.jta.platform" value="org.hibernate.service.jta.platform.internal.SunOneJtaPlatform"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.SQLServer2008Dialect"/>
</properties>
</persistence-unit>
</persistence>
My connection pool config on Glassfish is:
<jdbc-connection-pool datasource-classname="com.microsoft.sqlserver.jdbc.SQLServerDataSource" steady-pool-size="2" name="myPool" res-type="javax.sql.DataSource">
<property name="TrustServerCertificate" value="false"></property>
<property name="User" value="sa"></property>
<property name="LastUpdateCount" value="true"></property>
<property name="ResponseBuffering" value="adaptive"></property>
<property name="URL" value="jdbc:sqlserver://server\bd"></property>
<property name="XopenStates" value="false"></property>
<property name="PacketSize" value="8000"></property>
<property name="Password" value="mypass"></property>
<property name="ApplicationName" value="Microsoft JDBC Driver for SQL Server"></property>
<property name="DatabaseName" value="MyDB"></property>
<property name="Encrypt" value="false"></property>
<property name="LockTimeout" value="-1"></property>
<property name="SendStringParametersAsUnicode" value="true"></property>
<property name="MultiSubnetFailover" value="false"></property>
<property name="ApplicationIntent" value="readwrite"></property>
<property name="LoginTimeout" value="15"></property>
<property name="WorkstationID" value="My-MacBook-Pro.local"></property>
<property name="ServerName" value="xpto"></property>
<property name="PortNumber" value="1433"></property>
<property name="SelectMethod" value="direct"></property>
<property name="SendTimeAsDatetime" value="true"></property>
</jdbc-connection-pool>
Datasource config:
<jdbc-resource pool-name="myPool" jndi-name="jdbc/myDataSource"></jdbc-resource>
My EJB looks like this:
#PersistenceContext
private EntityManager em;
public void updateUser(User u) {
em.merge(u);
}
Any idea how I can fix that?
Thanks!
In my case, I was running the Hibernate 5 with tomcat and stop working when I changed to glassfish 4.1
The reason was the oldest jboss-logging.jar at: "YOUR_GLASSFISH_FOLDER/glassfish/modules"
Why? The hibernate 5 has dependency with the newest version of jboss-logging, and the glassfish uses the oldest version even if you declare inside your POM file the newest version. Actually I'm using:
org.jboss.logging jboss-logging 3.3.0.Final
Then I downloaded and replace the old .jar inside modules path and back to work, I spent 2 days trying to solve that and I hope it helps some future issues =D
I used this link to help me: https://medium.com/#mertcal/using-hibernate-5-on-payara-cc242212a5d6#.npq2hdprz
Could you please try the following configuration:
<?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="YOUR_PERSISTANCE_NAME" transaction-type="RESOURCE_LOCAL">
<provider>YOUR_PROVIDER</provider>
<!-- ENTITIES -->
<class>com.company.project....EntityA</class>
<class>com.company.project....EntityB</class>
<class>com.company.project....EntityC</class>
<properties>
<property name="javax.persistence.jdbc.url" value="YOUR_URL_TO_DB" />
<property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver" />
<property name="javax.persistence.jdbc.user" value="USER" />
<property name="javax.persistence.jdbc.password" value="PASS" />
<property name="eclipselink.logging.level" value="INFO" />
<property name="eclipselink.target-database" value="PostgreSQL" />
</properties>
</persistence-unit>