Enhydra 3.1 API

com.lutris.appserver.server.sql.standard
Class StandardObjectIdAllocator

java.lang.Object
  |
  +--com.lutris.appserver.server.sql.standard.StandardObjectIdAllocator
Direct Known Subclasses:
InformixObjectIdAllocator, MsqlObjectIdAllocator, OracleObjectIdAllocator, SybaseObjectIdAllocator

public class StandardObjectIdAllocator
extends java.lang.Object
implements ObjectIdAllocator

Object ids can only be created via this manager. Ensures that all object ids are unique across all objects in this logical database. Also ensures good performance for allocating object ids.

The configuration data is specified in the section: DatabaseManager.DB.dbName.ObjectId

Configuration fields are:

Since:
LBS1.8
Version:
$Revision: 1.7.12.1 $

Constructor Summary
protected StandardObjectIdAllocator(LogicalDatabase logicalDatabase, Config objIdConfig)
          Initialize the object id manager.
 
Method Summary
 ObjectId allocate()
          Allocates a new object id.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

StandardObjectIdAllocator

protected StandardObjectIdAllocator(LogicalDatabase logicalDatabase,
                                    Config objIdConfig)
                             throws ConfigException
Initialize the object id manager.
Parameters:
objCacheSize - The number of object ids to cache between database queries.
objIdMinValue - The starting number for object ids. Used only if object id table is empty.
Throws:
ConfigException - if bad configuration information is given in the config file.
Method Detail

allocate

public ObjectId allocate()
Allocates a new object id.
Specified by:
allocate in interface ObjectIdAllocator

Enhydra 3.1 API