com.sun.sgs.impl.service.data
Class ClassesTable

java.lang.Object
  com.sun.sgs.impl.service.data.ClassesTable

final class ClassesTable
extends Object

Manages information about class descriptors used to serialize managed objects. This class caches information about class descriptors and class IDs that it obtains from the data store. The cache is filled on demand, and uses soft and weak references, so it can be cleared by the GC as needed.

Constructor Summary

ClassesTable(DataStore store)
Creates an instance with the specified data store.

Method Summary

(package private) ClassSerialization	createClassSerialization(Transaction txn) Returns an implementation of ClassSerialization that uses this table to lookup class descriptors, uses the specified transaction when making requests of the data store, and uses Int30 to represent class IDs.
(package private) int	getClassId(Transaction txn, ObjectStreamClass classDesc) Returns the class ID associated with a class descriptor.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ClassesTable

ClassesTable(DataStore store)

Creates an instance with the specified data store.

Method Detail

createClassSerialization

ClassSerialization createClassSerialization(Transaction txn)

Returns an implementation of ClassSerialization that uses this table to lookup class descriptors, uses the specified transaction when making requests of the data store, and uses Int30 to represent class IDs.

getClassId

int getClassId(Transaction txn,
               ObjectStreamClass classDesc)

Returns the class ID associated with a class descriptor.

Parameters:

txn - the transaction under which the operation should take place

classDesc - the class descriptor

Returns:

the class ID

Throws:

ObjectIOException - if a problem occurs serializing the class descriptor

TransactionAbortedException - if the data store was consulted and the transaction was aborted due to a lock conflict or timeout

TransactionNotActiveException - if the data store was consulted and the transaction is not active

IllegalStateException - if the data store was consulted and the operation failed because of a problem with the current transaction