db4o Developer Community

March 2007 - Posts

• Commit Time Callbacks

  Which db4o feature provides you with the ability to ensure that specific constraints are not violated whenever objects are to be committed to a database file? Which db4o feature allows you to keep your client-side object cache in sync with whatever changes Read More... Posted Tuesday, March 20, 2007 12:02 PM by Rodrigo B. de Oliveira | 4 Comments Filed under: db4o

• Unique fields constraints

  Unique Constraints allow a user to define a field to be unique across a particular Class. This means that you cannot save an object where a previously committed object has the same field value for fields marked as unique. A Unique Constraint is checked Read More... Posted Tuesday, March 20, 2007 10:06 AM by Patrick Roemer | 8 Comments

• Get Ready to Catch

  db4o 6.2 introduces some dramatic changes to how exceptions are handled within the db4o core. db4o was initially designed to "always work" no matter what was thrown at it and therefore it did not throw many exceptions. This has proven to be nice in some Read More... Posted Monday, March 19, 2007 7:02 AM by treeder | 8 Comments