Freeze

Overview

Freeze provides automatic persistence for Ice servants.

BackgroundSaveEvictor: A background-save evictor is an evictor that saves updates asynchronously in a background thread.
Connection: A connection to a database (database environment with Berkeley DB).
Evictor: An automatic Ice object persistence manager, based on the evictor pattern.
EvictorIterator: An iterator for the objects managed by the evictor.
ServantInitializer: A servant initializer provides the application with an opportunity to perform custom servant initialization.
Transaction: A transaction.
TransactionalEvictor: A transactional evictor is an evictor that performs every single read-write operation within its own transaction.

DatabaseException: A Freeze database exception.
DeadlockException: A Freeze database deadlock exception.
EvictorDeactivatedException: This exception is raised if the evictor has been deactivated.
IndexNotFoundException: Exception raised when Freeze fails to locate an index
InvalidPositionException: This Freeze Iterator is not on a valid position, for example this position has been erased.
NoSuchElementException: This exception is raised if there are no further elements in the iteration.
NotFoundException: A Freeze database exception, indicating that a database record could not be found.
TransactionAlreadyInProgressException: An attempt was made to start a transaction while a previous transaction has not yet been committed or rolled back.

CatalogData: The catalog keeps information about Freeze Maps and Freeze evictors in a Berkeley Db environment.
ObjectRecord: The evictor uses a number of maps with ::Ice::Identity keys and ObjectRecord values as its persistent storage.
Statistics: The evictor maintains statistics about each object.