org.apache.marmotta.kiwi.persistence.registry

Interface KiWiTripleRegistry

All Known Implementing Classes:

CacheTripleRegistry, DBTripleRegistry, LocalTripleRegistry

public interface KiWiTripleRegistry

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Author:

Sebastian Schaffert (sschaffert@apache.org)

Method Summary

Methods

Modifier and Type	Method and Description
void	deleteKey(IntArray key) Remove the key with the given key, e.g.
long	lookupKey(IntArray key) Check if another (or the same) transaction has already registered an ID for the triple with the given key.
void	registerKey(IntArray key, long transactionId, long tripleId) Register a key/triple id pair in the triple registry for the given transaction ID.
void	releaseTransaction(long transactionId) Free all registry entries claimed by the transaction with the given identifier.

Method Detail

registerKey

void registerKey(IntArray key,
               long transactionId,
               long tripleId)

Register a key/triple id pair in the triple registry for the given transaction ID.

Parameters:

key - the key identifying the triple arguments (subject, object, predicate, context)

transactionId - the identifier of the transaction registering the triple id

tripleId - the new triple identifier

lookupKey

long lookupKey(IntArray key)

Check if another (or the same) transaction has already registered an ID for the triple with the given key. Returns -1 in case no other ID has been registered, or a value >0 otherwise.

Parameters:

key - the key identifying the triple arguments (subject, object, predicate, context)

Returns:

id of the triple or -1

releaseTransaction

void releaseTransaction(long transactionId)

Free all registry entries claimed by the transaction with the given identifier. Should remove or expire all registry entries to avoid unnecessary storage consumption.

Parameters:

transactionId - the identifier of the transaction registering the triple id

deleteKey

void deleteKey(IntArray key)

Remove the key with the given key, e.g. when a statement is again deleted during a transaction.

Parameters:

key - the key identifying the triple arguments (subject, object, predicate, context)