61 | @SequenceGenerator and single id in whole database private long id; As I understand default strategy is Auto, which causes global ID's per database |
61 | Many clients access same databaseHi, I have a program to manage clients of my tennis club. But we have several different computer programs open that access the database. How can I implement this topology so that there is one Persistence context for all the client programs on the different computers. For example: When I change |
61 | Does JPA have any configuration to create DDL's that are database specific that are database specific. miteshpoo Mitesh Poojari Maybe what you are looking for is the Table annotation |
61 | Is there a way to extract the schema from an existing Database?Hi ObjectDB, Is there a way to extract the schema from an existing Database? i.e. without using my class files Thanks EKK EKK Emmanuel Keskes The schema is available for viewing in the Explorer. You may use the JPA Metamodel API to extract it using your own code. support Support |
61 | Get list of database filesHi, we would like to know if there is any API we can use to get a list of all database files on an ObjectDB server. The ObjectDB explorer has such a feature (File->Open C/S Connection->Browse...). Thanks for help! skolb Sebastian Kolb There is an undocumented method, which is indeed in use by |
61 | Access to client/server database from multiple applicationsIs there a preferred way to run a client-server database so that updates from one application are immediately visible to another? The way I managed this was to run PersistenceManagerFactory.getDataStoreCache().evictAll(true,MyClass.class) to ensure that a query on MyClass would contain updated data |
59 | Eclipse/JPA database tutorialEclipse/JPA database tutorial |
12 | Explorer Features - refresh + viewing open embedded databaseRequest for feature: Ability to auto-refresh an explorer view, say at regular intervals of a few seconds. (at a minimum one ought to be able to manually refresh, for example the list of persistent types). additionally, it would be useful to be able to view an embedded database (read only mode) via the explorer. dmoshal David Moshal |
12 | NullPointerException on initial database creationI'm getting the following exception on initial creation of a database. There's no indication as to what's wrong and there's nothing in the log. com.objectdb.o.InternalException: java.lang.NullPointerException: null java.lang.NullPointerException at com.objectdb.o.SCO.b(SCO.java:209) at com |
2 | Step 3: Add a Main Class to store Point objects in the database and then retrieve them from the database. Use copy and paste ... [] args) { // Open a database connection // (create a new database if it doesn't exist ... (); // Store 1000 Point objects in the database: em.getTransaction().begin |
