Class RllRAMAccessManager

java.lang.Object
org.apache.derby.impl.store.access.RAMAccessManager
org.apache.derby.impl.store.access.RllRAMAccessManager
All Implemented Interfaces:
CacheableFactory, ModuleControl, PropertySetCallback, AccessFactory

public class RllRAMAccessManager extends RAMAccessManager
Implements the row level locking accessmanager.
  • Field Details

    • system_lock_level

      private int system_lock_level
  • Constructor Details

    • RllRAMAccessManager

      public RllRAMAccessManager()
      Constructors for This class:
  • Method Details

    • getSystemLockLevel

      protected int getSystemLockLevel()
      Return the locking level of the system.

      This routine controls the lowest level of locking enabled for all locks for all tables accessed through this accessmanager. The concrete implementation may set this value always to table level locking for a client configuration, or it may set it to row level locking for a server configuration.

      If TransactionController.MODE_RECORD is returned table may either be locked at table or row locking depending on the type of access expected (ie. level 3 will require table locking for heap scans.)

      Specified by:
      getSystemLockLevel in class RAMAccessManager
      Returns:
      TransactionController.MODE_TABLE if only table locking allowed, else returns TransactionController.MODE_RECORD.
    • bootLookupSystemLockLevel

      protected void bootLookupSystemLockLevel(TransactionController tc) throws StandardException
      Query property system to get the System lock level.

      This routine will be called during boot after access has booted far enough, to allow access to the property conglomerate. This routine will call the property system and set the value to be returned by getSystemLockLevel().

      Specified by:
      bootLookupSystemLockLevel in class RAMAccessManager
      Throws:
      StandardException - Standard exception policy.