com.sun.sgs.impl.service.data.store
Interface DataStoreImpl.TxnInfoTable<T>

Type Parameters:

T - the type of information stored for each transaction

Enclosing class:

DataStoreImpl

protected static interface DataStoreImpl.TxnInfoTable<T>

Records information about all active transactions.

Method Summary

T	get(Transaction txn) Returns the information associated with the transaction, or null if none is found.
T	remove(Transaction txn) Removes the information associated with the transaction.
void	set(Transaction txn, T info) Sets the information associated with the transaction, which should not currently have associated information.

Method Detail

get

T get(Transaction txn)

Returns the information associated with the transaction, or null if none is found.

Parameters:

txn - the transaction

Returns:

the associated information, or null if none is found

Throws:

TransactionNotActiveException - if the implementation determines that the transaction is no longer active

IllegalStateException - if the implementation determines that the specified transaction does not match the current context

remove

T remove(Transaction txn)

Removes the information associated with the transaction.

Parameters:

txn - the transaction

Returns:

the previously associated information

Throws:

IllegalStateException - if the transaction is not active, or if the implementation determines that the specified transaction does not match the current context

set

void set(Transaction txn,
         T info)

Sets the information associated with the transaction, which should not currently have associated information.

Parameters:

txn - the transaction

info - the associated information