I've looked for answers for this but haven't been able to find any so asking these questions to this very apt community! I have a standalone java application that gets deployed in many environme...

The parameter unreturnedConnectionTimeout times out unreturned connections after a given period of time. I'm trying to decide whether I should use this in my production persistence.xml? A big plus ...

We created some libraries that all our projects will use, this libraries will provide the basic functionality of all our systems (login, some manage, etc). But the application itself could use anot...

I am stumped when it comes to the location of my persistence.xml file. I am using eclipselink 2.4 as my JPA 2.0 implementation and have my persistence.xml located under src/main/resources/META-INF/...

I have found the following manual https://code.google.com/p/javamelody/wiki/UserGuideAdvanced#JPA_monitoring It contains some info regarding the changes I should make in persistence.xml in order t...

Is there any way to generate the JPA 2.0 metamodel via maven without having a persistence.xml file. I'm using eclipselink. In my Java EE-projects I'm doing something like the following wich works ...

In my projects I often use JPA/Hibernate stack for database. When defining persistence.xml you have couple options you can set hibernate.hbm2ddl.auto. If set to create tables will be recreated on ...

A quick search on the Net reveals three or four variants how folks have been specifying xmlns and xsi:schemaLocation in persistence.xml. What would be the 'correct' manner to specify JPA version 2...

I'm working now with a JPA 2.0 project (in Eclipse Indigo). In my persistence.xml file I need to specify two <persistence-unit> tags, because I have two different database to work with. Doing th...

Help, i would like to my persistence xml properties value reference to my db.properties file. here's my db.properties file jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/a...

Edit: not duplicate but almost I would like to have my app persistence.xml to be something like <?xml version="1.0" encoding="UTF-8"?> <persistence xmlns="http://java.sun.com/xml/ns/pers...

I'm trying to persist the same entity to both MySQL and Postgres databases (this is primarily to identify any inconsistencies, and work out the details of any issues doing the dual-write -- which I...

I would like to take advantage of JPA @Entity annotations not to declare class entities a J2SE persistence.xml file. What I'd like to avoid : <persistence-unit name="test" transaction-type="RES...

Error "No persistence.xml file found in project" in Eclipse. Aim: Create a new project GWT+App engine+Maven Steps to create this: Google eclipse plugin: select "New Web Application Project". ...

In the persistence.xml JPA configuration file, you can have a line like: <persistence-unit name="com.nz_war_1.0-SNAPSHOTPU" transaction-type="JTA"> or sometimes: <persistence-unit name...

I have a Maven3 project where I'm using the tomcat7-maven-plugin. I would like to set the path for the embedded database via an environment variable argument to the jvm. Reading the variable with ...

I hava a standalone JPA (Hibernate) - MySQL Application. My persistence.xml looks like: <persistence-unit name="JPAProj" transaction-type="RESOURCE_LOCAL"> <!-- Persistence provider --...

I'm using Hibernate 4.1.9 in a Java web application (that uses a Oracle 11g database) and seem to be getting some run-away connections even though i'm using c3p0 pooling. it seems this should be ...

I do NOT want to configure in my java source code which can be done like: @org.hibernate.annotations.Entity( dynamicUpdate = true) because I want it to be configurable. I am not using hiberna...

I've a main method using SchemaUpdate to display at the console what tables to alter/create and it works fine in my Hibernate project: public static void main(String[] args) throws IOException { ...

I'm currently creating my entities and DAO with Hibernate Tools and reverse engineering. My config is Eclipse Indigo, JBoss AS7, Hibernate Tools 3.4 and Hibernate 4. The problem is when I try to de...

I want to be able to store my database information in a pom.xml (as properties) and inject the necessary values into my persistence.xml file. Is there any way I can achieve this in maven? an alter...

I am using tomcat connection pool, jpa, hibernate. The datasource i created in context.xml of tomcat works fine if I try to get it using : source = (DataSource) ((Context) c.lookup("java:comp/env"...

OK, sorry, I looked for answers to this for hours, but it took me entering the whole question for StackOverflow to bubble up the link I was looking for. You can read a lot of relevant information h...

I've created a jar file through spring roo (maven project - persistence archive) unit tests are running fine, the concerned files are on the following location jarFile/META-INF/persistence.xml jar...