org.apache.omid.transaction

Interface TransactionManager

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

AbstractTransactionManager

public interface TransactionManager
extends Closeable

Provides the methods to manage transactions (create, commit...)

Method Summary

Modifier and Type	Method and Description
Transaction	begin() Starts a new transaction.
void	commit(Transaction tx) Commits a transaction.
Transaction	fence(byte[] tableName) Creates a fence Creates a fence and returns a Transaction interface implementation that contains the fence information.
void	rollback(Transaction tx) Aborts a transaction.

Methods inherited from interface java.io.Closeable

close

Method Detail

begin

Transaction begin()
           throws TransactionException

Starts a new transaction. Creates and returns a Transaction interface implementation that will be used in TTable's methods for doing operations on the transactional context defined by the returned object.

Returns:

transaction representation of the created transaction

Throws:

TransactionException - in case of any issues

commit

void commit(Transaction tx)
     throws RollbackException,
            TransactionException

Commits a transaction. If the transaction was marked for rollback or has conflicts with another concurrent transaction it will be rolledback automatically and a RollbackException will be thrown.

Parameters:

tx - transaction to be committed.

Throws:

RollbackException - thrown when transaction has conflicts with another transaction or when was marked for rollback.

TransactionException - in case of any issues

rollback

void rollback(Transaction tx)
       throws TransactionException

Aborts a transaction. Automatically rollbacks the changes performed by the transaction.

Parameters:

tx - transaction to be rolled-back

Throws:

TransactionException - in case of any issues

fence

Transaction fence(byte[] tableName)
           throws TransactionException

Creates a fence Creates a fence and returns a Transaction interface implementation that contains the fence information.

Parameters:

tableName - name of the table that requires a fence

Returns:

transaction representation contains the fence timestamp as the TransactionId.

Throws:

TransactionException - in case of any issues