org.apache.jena.dboe.trans.data

Class TransBlob

java.lang.Object

org.apache.jena.dboe.transaction.txn.TransactionalComponentLifecycle<org.apache.jena.dboe.trans.data.TransBlob.BlobState>

org.apache.jena.dboe.trans.data.TransBlob

All Implemented Interfaces:

TransactionalComponent

public class TransBlob
extends TransactionalComponentLifecycle<org.apache.jena.dboe.trans.data.TransBlob.BlobState>

Manage a single binary (not too large) object. It is written and read from a file in one action, so changes completely replace the original contents. The whole object is written to the journal during prepare.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.jena.dboe.transaction.txn.TransactionalComponentLifecycle

TransactionalComponentLifecycle.ComponentState<X>

Constructor Summary

Constructors

Constructor and Description
TransBlob(ComponentId cid, org.apache.jena.dboe.base.file.BufferChannel file)

Method Summary

Modifier and Type	Method and Description
void	cleanStart()
void	finishRecovery()
ByteBuffer	getBlob()
String	getString() Get data as string - convenience operation
void	recover(ByteBuffer ref)
void	setBlob(ByteBuffer bb) Set the byte buffer.
void	setString(String dataStr) Set data from string - convenience operation
void	startRecovery()
String	toString()

Methods inherited from class org.apache.jena.dboe.transaction.txn.TransactionalComponentLifecycle

abort, attach, begin, commit, commitEnd, commitPrepare, complete, detach, getComponentId, getComponentState, promote, setComponentState, shutdown

Methods inherited from class java.lang.Object

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

Constructor Detail

TransBlob

public TransBlob(ComponentId cid,
                 org.apache.jena.dboe.base.file.BufferChannel file)

Method Detail

setBlob

public void setBlob(ByteBuffer bb)

Set the byte buffer. The byte buffer should not be accessed except by getBlob(). We avoid a copy in and copy out - we trust the caller. The byte buffer should be configured for read if used with getString().

getBlob

public ByteBuffer getBlob()

setString

public void setString(String dataStr)

Set data from string - convenience operation

getString

public String getString()

Get data as string - convenience operation

startRecovery

public void startRecovery()

Specified by:

startRecovery in interface TransactionalComponent

Specified by:

startRecovery in class TransactionalComponentLifecycle<org.apache.jena.dboe.trans.data.TransBlob.BlobState>

recover

public void recover(ByteBuffer ref)

Specified by:

recover in interface TransactionalComponent

Specified by:

recover in class TransactionalComponentLifecycle<org.apache.jena.dboe.trans.data.TransBlob.BlobState>

finishRecovery

public void finishRecovery()

Specified by:

finishRecovery in interface TransactionalComponent

Specified by:

finishRecovery in class TransactionalComponentLifecycle<org.apache.jena.dboe.trans.data.TransBlob.BlobState>

cleanStart

public void cleanStart()

toString

public String toString()

Overrides:

toString in class Object