org.apache.jena.system

Class TxnOp

java.lang.Object

org.apache.jena.system.TxnOp

public class TxnOp
extends Object

Constructor Summary

Constructors

Constructor and Description
TxnOp()

Method Summary

Modifier and Type	Method and Description
static void	compatibleWithPromote(TxnType requestedTxnType, Transactional currentTxn) Check an existing Transactional for compatibility with a TxnType and promote the Transactional if necessary.
static boolean	isTxnTypeCompatible(TxnType innerTxnType, TxnType outerTxnType) Check whether a TxnType is compatible with another.
static void	txnTypeCompatibleEx(TxnType innerTxnType, TxnType outerTxnType) Check whether a TxnType is compatible with another.

Methods inherited from class java.lang.Object

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

Constructor Detail

TxnOp

public TxnOp()

Method Detail

txnTypeCompatibleEx

public static void txnTypeCompatibleEx(TxnType innerTxnType,
                                       TxnType outerTxnType)

Check whether a TxnType is compatible with another. Typically the "inner" transaction is a requested new transaction and the outer one an existing transaction. Throw an exception if not compatible.

Parameters:

innerTxnType -

outerTxnType -

Throws:

JenaTransactionException

See Also:

isTxnTypeCompatible(org.apache.jena.query.TxnType, org.apache.jena.query.TxnType), compatibleWithPromote(org.apache.jena.query.TxnType, org.apache.jena.sparql.core.Transactional)

isTxnTypeCompatible

public static boolean isTxnTypeCompatible(TxnType innerTxnType,
                                          TxnType outerTxnType)

Check whether a TxnType is compatible with another. Typically then "inner" transaction is a requested new transaction and the outer one an existing transaction. A TxnType is compatible with (can run inside) another TxnType (for an an existing or outer transaction) if: the outer one covers the needs of the inner one
READ < PROMOTE (either) < WRITE < no outer In particular: Inner is READ works with any outer. Outer is WRITE works with any inner. For promoting if necessary, see compatibleWithPromote(org.apache.jena.query.TxnType, org.apache.jena.sparql.core.Transactional)

Parameters:

innerTxnType -

outerTxnType -

compatibleWithPromote

public static void compatibleWithPromote(TxnType requestedTxnType,
                                         Transactional currentTxn)

Check an existing Transactional for compatibility with a TxnType and promote the Transactional if necessary. The Transactional does not need to already be in a transaction. Throw a JenaTransactionException if not compatible (e.g. current READ, requesting a WRITE).

Parameters:

requestedTxnType -

currentTxn -

Throws:

JenaTransactionException - if not possible.