org.apache.cassandra.utils.concurrent

Class Transactional.AbstractTransactional

java.lang.Object

org.apache.cassandra.utils.concurrent.Transactional.AbstractTransactional

All Implemented Interfaces:

java.lang.AutoCloseable, Transactional

Direct Known Subclasses:

CompactionAwareWriter, CompressionMetadata.Writer, LifecycleTransaction, SequentialWriter.TransactionalProxy, SSTableRewriter, SSTableTxnWriter, SSTableWriter.TransactionalProxy

Enclosing interface:

Transactional

public abstract static class Transactional.AbstractTransactional
extends java.lang.Object
implements Transactional

A simple abstract implementation of Transactional behaviour. In general this should be used as the base class for any transactional implementations. If the implementation wraps any internal Transactional objects, it must proxy every commit() and abort() call onto each internal object to ensure correct behaviour

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Transactional.AbstractTransactional.State

Nested classes/interfaces inherited from interface org.apache.cassandra.utils.concurrent.Transactional

Transactional.AbstractTransactional

Constructor Summary

Constructors

Constructor and Description
AbstractTransactional()

Method Summary

Modifier and Type	Method and Description
void	abort()
java.lang.Throwable	abort(java.lang.Throwable accumulate) rollback any effects of this transaction object graph; delegates first to doCleanup, then to doAbort
void	close()
void	commit()
java.lang.Throwable	commit(java.lang.Throwable accumulate) commit any effects of this transaction object graph, then cleanup; delegates first to doCommit, then to doCleanup
protected abstract java.lang.Throwable	doAbort(java.lang.Throwable accumulate)
protected abstract java.lang.Throwable	doCommit(java.lang.Throwable accumulate)
protected java.lang.Throwable	doPostCleanup(java.lang.Throwable accumulate) perform an exception-safe post-abort cleanup
protected java.lang.Throwable	doPreCleanup(java.lang.Throwable accumulate) perform an exception-safe pre-abort/commit cleanup; this will be run after prepareToCommit (so before commit), and before abort
protected abstract void	doPrepare() Do any preparatory work prior to commit.
java.lang.Object	finish() convenience method to both prepareToCommit() and commit() in one operation; only of use to outer-most transactional object of an object graph
void	prepareToCommit() The first phase of commit: delegates to doPrepare(), with valid state transition enforcement.
Transactional.AbstractTransactional.State	state()

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractTransactional

public AbstractTransactional()

Method Detail

doCommit

protected abstract java.lang.Throwable doCommit(java.lang.Throwable accumulate)

doAbort

protected abstract java.lang.Throwable doAbort(java.lang.Throwable accumulate)

doPreCleanup

protected java.lang.Throwable doPreCleanup(java.lang.Throwable accumulate)

perform an exception-safe pre-abort/commit cleanup; this will be run after prepareToCommit (so before commit), and before abort

doPostCleanup

protected java.lang.Throwable doPostCleanup(java.lang.Throwable accumulate)

perform an exception-safe post-abort cleanup

doPrepare

protected abstract void doPrepare()

Do any preparatory work prior to commit. This method should throw any exceptions that can be encountered during the finalization of the behaviour.

commit

public final java.lang.Throwable commit(java.lang.Throwable accumulate)

commit any effects of this transaction object graph, then cleanup; delegates first to doCommit, then to doCleanup

Specified by:

commit in interface Transactional

abort

public final java.lang.Throwable abort(java.lang.Throwable accumulate)

rollback any effects of this transaction object graph; delegates first to doCleanup, then to doAbort

Specified by:

abort in interface Transactional

close

public final void close()

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface Transactional

prepareToCommit

public final void prepareToCommit()

The first phase of commit: delegates to doPrepare(), with valid state transition enforcement. This call should be propagated onto any child objects participating in the transaction

Specified by:

prepareToCommit in interface Transactional

finish

public java.lang.Object finish()

convenience method to both prepareToCommit() and commit() in one operation; only of use to outer-most transactional object of an object graph

abort

public final void abort()

commit

public final void commit()

state

public final Transactional.AbstractTransactional.State state()