co.cask.tephra

Class AbstractTransactionAwareTable

java.lang.Object

co.cask.tephra.AbstractTransactionAwareTable

All Implemented Interfaces:

TransactionAware

public abstract class AbstractTransactionAwareTable
extends Object
implements TransactionAware

Base class for all the common parts of the HBase version-specific TransactionAwareHTable implementations.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	AbstractTransactionAwareTable.ActionChange Record of each transaction that causes a change.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	allowNonTransactional
protected Map<Long,Set<AbstractTransactionAwareTable.ActionChange>>	changeSets
protected TxConstants.ConflictDetection	conflictLevel
protected Transaction	tx
protected TransactionCodec	txCodec

Constructor Summary

Constructors

Constructor and Description
AbstractTransactionAwareTable(TxConstants.ConflictDetection conflictLevel, boolean allowNonTransactional)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addToChangeSet(byte[] row, byte[] family, byte[] qualifier)
boolean	commitTx()
protected abstract boolean	doCommit() Commits any pending writes by flushing the wrapped HTable instance.
protected abstract boolean	doRollback() Rolls back any persisted changes from the transaction by issuing offsetting deletes to the wrapped HTable instance.
boolean	getAllowNonTransactional() True if the instance allows non-transaction operations.
byte[]	getChangeKey(byte[] row, byte[] family, byte[] qualifier)
protected abstract byte[]	getTableKey() Returns the table name to use as a key prefix for the transaction change set.
String	getTransactionAwareName()
Collection<byte[]>	getTxChanges()
void	postTxCommit()
boolean	rollbackTx()
void	setAllowNonTransactional(boolean allowNonTransactional) Set whether the instance allows non-transactional operations.
void	startTx(Transaction tx)
void	updateTx(Transaction tx)

Methods inherited from class java.lang.Object

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

Field Detail

txCodec

protected final TransactionCodec txCodec

changeSets

protected final Map<Long,Set<AbstractTransactionAwareTable.ActionChange>> changeSets

conflictLevel

protected final TxConstants.ConflictDetection conflictLevel

tx

protected Transaction tx

allowNonTransactional

protected boolean allowNonTransactional

Constructor Detail

AbstractTransactionAwareTable

public AbstractTransactionAwareTable(TxConstants.ConflictDetection conflictLevel,
                             boolean allowNonTransactional)

Method Detail

getAllowNonTransactional

public boolean getAllowNonTransactional()

True if the instance allows non-transaction operations.

Returns:

setAllowNonTransactional

public void setAllowNonTransactional(boolean allowNonTransactional)

Set whether the instance allows non-transactional operations.

Parameters:

allowNonTransactional -

startTx

public void startTx(Transaction tx)

Specified by:

startTx in interface TransactionAware

updateTx

public void updateTx(Transaction tx)

Specified by:

updateTx in interface TransactionAware

getTxChanges

public Collection<byte[]> getTxChanges()

Specified by:

getTxChanges in interface TransactionAware

getChangeKey

public byte[] getChangeKey(byte[] row,
                  byte[] family,
                  byte[] qualifier)

commitTx

public boolean commitTx()
                 throws Exception

Specified by:

commitTx in interface TransactionAware

Throws:

Exception

doCommit

protected abstract boolean doCommit()
                             throws IOException

Commits any pending writes by flushing the wrapped HTable instance.

Throws:

IOException

postTxCommit

public void postTxCommit()

Specified by:

postTxCommit in interface TransactionAware

getTransactionAwareName

public String getTransactionAwareName()

Specified by:

getTransactionAwareName in interface TransactionAware

getTableKey

protected abstract byte[] getTableKey()

Returns the table name to use as a key prefix for the transaction change set.

rollbackTx

public boolean rollbackTx()
                   throws Exception

Specified by:

rollbackTx in interface TransactionAware

Throws:

Exception

doRollback

protected abstract boolean doRollback()
                               throws Exception

Rolls back any persisted changes from the transaction by issuing offsetting deletes to the wrapped HTable instance. How this is handled will depend on the delete API exposed by the specific version of HBase.

Throws:

Exception

addToChangeSet

protected void addToChangeSet(byte[] row,
                  byte[] family,
                  byte[] qualifier)