co.cask.tephra.persist

Class AbstractTransactionStateStorage

java.lang.Object

com.google.common.util.concurrent.AbstractIdleService

co.cask.tephra.persist.AbstractTransactionStateStorage

All Implemented Interfaces:

TransactionStateStorage, com.google.common.util.concurrent.Service

Direct Known Subclasses:

HDFSTransactionStateStorage, LocalFileTransactionStateStorage

public abstract class AbstractTransactionStateStorage
extends com.google.common.util.concurrent.AbstractIdleService
implements TransactionStateStorage

Common base class for all transaction storage implementations. This implement logic to prefix a snapshot with a version when encoding, and to select the correct codec for decoding based on this version prefix.

Nested Class Summary

Nested classes/interfaces inherited from interface com.google.common.util.concurrent.Service

com.google.common.util.concurrent.Service.Listener, com.google.common.util.concurrent.Service.State

Field Summary

Fields

Modifier and Type	Field and Description
protected SnapshotCodecProvider	codecProvider

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractTransactionStateStorage(SnapshotCodecProvider codecProvider)

Method Summary

Methods

Modifier and Type	Method and Description
void	writeSnapshot(OutputStream out, TransactionSnapshot snapshot) Persists a snapshot of transaction state to an output stream.

Methods inherited from class com.google.common.util.concurrent.AbstractIdleService

addListener, executor, isRunning, shutDown, start, startAndWait, startUp, state, stop, stopAndWait, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface co.cask.tephra.persist.TransactionStateStorage

createLog, deleteLogsOlderThan, deleteOldSnapshots, getLatestSnapshot, getLocation, getLogsSince, listLogs, listSnapshots, writeSnapshot

Methods inherited from interface com.google.common.util.concurrent.Service

addListener, isRunning, start, startAndWait, state, stop, stopAndWait

Field Detail

codecProvider

protected final SnapshotCodecProvider codecProvider

Constructor Detail

AbstractTransactionStateStorage

protected AbstractTransactionStateStorage(SnapshotCodecProvider codecProvider)

Method Detail

writeSnapshot

public void writeSnapshot(OutputStream out,
                 TransactionSnapshot snapshot)
                   throws IOException

Description copied from interface: TransactionStateStorage

Persists a snapshot of transaction state to an output stream.

Specified by:

writeSnapshot in interface TransactionStateStorage

Throws:

IOException