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Tutorial
3

Step 3: Add a Context Listener Class

if not exists yet) when the web application starts, by instantiating an EntityManagerFactory ... context - when the web application starts (contextInitialized). Retrieves the EntityManagerFactory
Tutorial
3

JPA Tutorials [2011-02-09]

The following tutorials demonstrate how to develop database driven applications using JPA and the ObjectDB ODBMS (Object Oriented Database Management System). Console JPA Tutorial The Quick Start tutorial demonstrates how to use ObjectDB and JPA in a console application: Quick Start with JPA
Tutorial
3

Step 3: Add a Context Listener Class

if not exists yet) when the web application starts, by instantiating an EntityManagerFactory ... it as an application scope attribute in the servlet context - when the web application starts
Tutorial
3

JPA Tutorials

The following tutorials demonstrate how to develop database driven applications using JPA and the ObjectDB ODBMS (Object Oriented Database Management System). Console JPA Tutorial The Quick Start tutorial demonstrates how to use ObjectDB and JPA in a console application: Quick Start with JPA
Manual
3

WHERE clause (JPQL / Criteria API)

, the WHERE clause gets an opportunity to function as a filter. The boolean expression in
Manual
3

FROM clause (JPQL / Criteria API)

have any matching inner value it gets at least a NULL value as a matching value in the FROM iteration
Manual
3

JPA Primary Key

values. Obtaining the Primary Key JPA 2 provides a generic method for getting the object ID (primary key
Issue
2

Best practise loading big data

then our application gets into trouble. So we need a solution for this serious issue. We would like to know ... 2.000.000 MyValue objects I open the DB connection, create an entitiy manager and start to read ... expected - normally enhancement speeds up the application. At start of reading, the DB can deliver
Issue
2

Pessimistic lock timeout - blocks indefinitely

!). However, this is the output I get: Starting... updater3 starting updater4 starting updater0 starting updater2 starting updater1 starting updater1 LockTimeoutException updater2 LockTimeoutException updater3 LockTimeoutException updater4 changing name from start to updater4 updater4
Manual
2

GROUP BY and HAVING clauses

with names that start with that letter and the number of different currencies that are used by