org.apache.flume.channel
Class PseudoTxnMemoryChannel.NoOpTransaction

java.lang.Object
  extended by org.apache.flume.channel.PseudoTxnMemoryChannel.NoOpTransaction
All Implemented Interfaces:
Transaction
Enclosing class:
PseudoTxnMemoryChannel

public static class PseudoTxnMemoryChannel.NoOpTransaction
extends Object
implements Transaction

A no-op transaction implementation that does nothing at all.


Nested Class Summary
 
Nested classes/interfaces inherited from interface org.apache.flume.Transaction
Transaction.TransactionState
 
Constructor Summary
PseudoTxnMemoryChannel.NoOpTransaction()
           
 
Method Summary
 void begin()
          Starts a transaction boundary for the current channel operation.
 void close()
          Ends a transaction boundary for the current channel operation.
 void commit()
          Indicates that the transaction can be successfully committed.
 void rollback()
          Indicates that the transaction can must be aborted.
static Transaction sharedInstance()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

PseudoTxnMemoryChannel.NoOpTransaction

public PseudoTxnMemoryChannel.NoOpTransaction()
Method Detail

sharedInstance

public static Transaction sharedInstance()

begin

public void begin()
Description copied from interface: Transaction

Starts a transaction boundary for the current channel operation. If a transaction is already in progress, this method will join that transaction using reference counting.

Note: For every invocation of this method there must be a corresponding invocation of Transaction.close() method. Failure to ensure this can lead to dangling transactions and unpredictable results.

Specified by:
begin in interface Transaction

commit

public void commit()
Description copied from interface: Transaction
Indicates that the transaction can be successfully committed. It is required that a transaction be in progress when this method is invoked.

Specified by:
commit in interface Transaction

rollback

public void rollback()
Description copied from interface: Transaction
Indicates that the transaction can must be aborted. It is required that a transaction be in progress when this method is invoked.

Specified by:
rollback in interface Transaction

close

public void close()
Description copied from interface: Transaction

Ends a transaction boundary for the current channel operation. If a transaction is already in progress, this method will join that transaction using reference counting. The transaction is completed only if there are no more references left for this transaction.

Note: For every invocation of this method there must be a corresponding invocation of Transaction.begin() method. Failure to ensure this can lead to dangling transactions and unpredictable results.

Specified by:
close in interface Transaction


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