Package org.apache.accumulo.core.fate

Class Fate<T>

java.lang.Object

org.apache.accumulo.core.fate.Fate<T>

public class Fate<T>
extends Object

Fault tolerant executor

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Fate.TxInfo

Constructor Summary

Constructors

Constructor	Description
Fate(T environment, TStore<T> store, Function<Repo<T>,String> toLogStrFunc, AccumuloConfiguration conf)	Creates a Fault-tolerant executor.

Method Summary

Modifier and Type	Method	Description
boolean	cancel(long tid)	Attempts to cancel a running Fate transaction
void	delete(long tid)
Exception	getException(long tid)
String	getReturn(long tid)
void	seedTransaction(String txName, long tid, Repo<T> repo, boolean autoCleanUp, String goalMessage)
void	shutdown()	Flags that FATE threadpool to clear out and end.
long	startTransaction()
ReadOnlyTStore.TStatus	waitForCompletion(long tid)

Methods inherited from class java.lang.Object

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

Constructor Detail

Fate

public Fate(T environment,
            TStore<T> store,
            Function<Repo<T>,String> toLogStrFunc,
            AccumuloConfiguration conf)

Creates a Fault-tolerant executor.

Parameters:

toLogStrFunc - A function that converts Repo to Strings that are suitable for logging

Method Detail

startTransaction

public long startTransaction()

seedTransaction

public void seedTransaction(String txName,
                            long tid,
                            Repo<T> repo,
                            boolean autoCleanUp,
                            String goalMessage)

waitForCompletion

public ReadOnlyTStore.TStatus waitForCompletion(long tid)

cancel

public boolean cancel(long tid)

Attempts to cancel a running Fate transaction

Parameters:

tid - transaction id

Returns:

true if transaction transitioned to a failed state or already in a completed state, false otherwise

delete

public void delete(long tid)

getReturn

public String getReturn(long tid)

getException

public Exception getException(long tid)

shutdown

public void shutdown()

Flags that FATE threadpool to clear out and end. Does not actively stop running FATE processes.