Module org.apache.jena.core

Package org.apache.jena.graph.impl

Class TransactionHandlerBase

java.lang.Object

org.apache.jena.graph.impl.TransactionHandlerBase

All Implemented Interfaces:

TransactionHandler

Direct Known Subclasses:

BaseInfGraph.InfTransactionHandler, SimpleTransactionHandler

public abstract class TransactionHandlerBase
extends Object
implements TransactionHandler

A base for transaction handlers; provide implementations of execute* operations using the fundamental begin-commit-abort. (This class predates java8 default methods.)

Constructor Summary

Constructors

Constructor	Description
TransactionHandlerBase()

Method Summary

Modifier and Type	Method	Description
<T> T	calculate(Supplier<T> action)	Execute the supplier action within a transaction.
<T> T	calculateAlways(Supplier<T> action)	Calculate inside a transaction if transactions supported - calculate anyway if transactions not supported.
void	execute(Runnable action)	Execute the runnable action within a transaction.
void	executeAlways(Runnable action)	Execute inside a transaction if transactions supported - execute anyway if transactions not supported.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jena.graph.TransactionHandler

abort, begin, commit, transactionsSupported

Constructor Details

TransactionHandlerBase

public TransactionHandlerBase()

Method Details

execute

public void execute(Runnable action)

Execute the runnable action within a transaction. If it completes normally, commit the transaction, otherwise abort the transaction.

Specified by:

execute in interface TransactionHandler

executeAlways

public void executeAlways(Runnable action)

Execute inside a transaction if transactions supported - execute anyway if transactions not supported.

Specified by:

executeAlways in interface TransactionHandler

calculate

public <T> T calculate(Supplier<T> action)

Execute the supplier action within a transaction. If it completes normally, commit the transaction and return the result, otherwise abort the transaction.

Specified by:

calculate in interface TransactionHandler

calculateAlways

public <T> T calculateAlways(Supplier<T> action)

Calculate inside a transaction if transactions supported - calculate anyway if transactions not supported.

Specified by:

calculateAlways in interface TransactionHandler