org.apache.jena.system

Class Txn

java.lang.Object

org.apache.jena.system.Txn

public class Txn
extends Object

Application utilities for transactions.

• "Autocommit" provided.
• Nested transaction are not supported but calling inside an existing transaction, which must be compatible, (i.e. a write needs a WRITE transaction). causes the transaction to be used.

Constructor Summary

Constructors

Constructor and Description
Txn()

Method Summary

Modifier and Type	Method and Description
static <T extends Transactional,X> X	calculateRead(T txn, Supplier<X> r) Execute and return a value in a read transaction
static <T extends Transactional,X> X	calculateWrite(T txn, Supplier<X> r) Execute and return a value in a write transaction.
static <T extends Transactional> void	executeRead(T txn, Runnable r) Execute the Runnable in a read transaction.
static <T extends Transactional> void	executeWrite(T txn, Runnable r) Execute the Runnable in a write transaction

Methods inherited from class java.lang.Object

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

Constructor Detail

Txn

public Txn()

Method Detail

executeRead

public static <T extends Transactional> void executeRead(T txn,
                                                         Runnable r)

Execute the Runnable in a read transaction.

calculateRead

public static <T extends Transactional,X> X calculateRead(T txn,
                                                          Supplier<X> r)

Execute and return a value in a read transaction

executeWrite

public static <T extends Transactional> void executeWrite(T txn,
                                                          Runnable r)

Execute the Runnable in a write transaction

calculateWrite

public static <T extends Transactional,X> X calculateWrite(T txn,
                                                           Supplier<X> r)

Execute and return a value in a write transaction.