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Problem with @OrderBy

When I use @OrderBy and supply multiple order fields I get and error when ObjectDB Explorer expands ... is referenced as if it were an entity instead of a field of an entity. If I remove the multiple fields ... bug in handling multiple order expressions in inverse (mapped by) fields. Version 2.2.2 includes

Multi-tenant setup

Hi, does anybody have experience with multi tenant setup of objectDB. For example using multiple schema or multiple database. How to handle connections between app (Jboss Wildfly) and pass query ... with multiple databases. It is very easy when accessing databases directly (by database path

Examples of queries

paulfo Paul Boon See this sections in the manual regarding SELECT queries that select multiple expressions: Multiple SELECT Expressions Result Classes (Constructor Expressions) What you need is not unique for GROUP BY but for common for queries that return multiple expressions in every result. support Support

Where Does ObjectDB Block/Lock?

PersistenceManager by multiple threads? 2) Does it lock at PersistenceManager.currentTransaction()? 3 ... are synchronized so multiple threads should be able to access and use a shared PersistenceManager instance safely ... against the same database concurrently (not in a queue) you will need multiple PersistenceManager instances

Embedable & Reference?

This is the normal behavior. Embedded objects cannot be shared by multiple references. If you have multiple references to an embedded object during persist then multiple instances of that embedded object are stored

Objectdb EntityManagerFactory problem

one EntityManagerFactory per application, with multiple EntityManager instances for multiple database connections. support Support

ObjectDB embeddable Springboot

Hi I have not seen, cursory search was not informative, if odb can be embedded like derby. How does odb handle byte[]. How do you create multiple dbs. Finally is there a gui to examine the schema ... ). > How do you create multiple dbs. See this documentation page. > Finally is there a gui to examine the schema? Yes. The Explorer. support Support

Activation Issue

your site license to generate multiple activation codes. You may also specify multiple activation codes in

Are Queries in ObjectDB Multithreaded ?

. However, if your application use multiple threads that execute multiple queries against ObjectDB simultaneously, then ObjectDB

Optimistic lock failed

your accessing that object in the database from multiple methods simultaneously or you've got some super ... then you can try waiting before trying the transaction again or trying multiple times. jgleoj23 Joseph Gardi

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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