Package org.apache.cassandra.service.paxos.v1

Class AbstractPaxosCallback<T>

java.lang.Object

org.apache.cassandra.service.paxos.v1.AbstractPaxosCallback<T>

All Implemented Interfaces:

RequestCallback<T>

Direct Known Subclasses:

PrepareCallback, ProposeCallback

public abstract class AbstractPaxosCallback<T>
extends java.lang.Object
implements RequestCallback<T>

Field Summary

Fields

Modifier and Type	Field	Description
protected CountDownLatch	latch
protected int	targets

Constructor Summary

Constructors

Constructor	Description
AbstractPaxosCallback(int targets, ConsistencyLevel consistency, Dispatcher.RequestTime requestTime)

Method Summary

Modifier and Type	Method	Description
void	await()
int	getResponseCount()
boolean	invokeOnFailure()	Returns true if the callback handles failure reporting - in which case the remove host will be asked to report failures to us in the event of a problem processing the request.
void	onFailure(InetAddressAndPort from, RequestFailureReason failureReason)	Called when there is an exception on the remote node or timeout happens

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.net.RequestCallback

onResponse, trackLatencyForSnitch

Field Detail

latch

protected final CountDownLatch latch

targets

protected final int targets

Constructor Detail

AbstractPaxosCallback

public AbstractPaxosCallback(int targets,
                             ConsistencyLevel consistency,
                             Dispatcher.RequestTime requestTime)

Method Detail

getResponseCount

public int getResponseCount()

await

public void await()
           throws WriteTimeoutException

Throws:

WriteTimeoutException

onFailure

public void onFailure(InetAddressAndPort from,
                      RequestFailureReason failureReason)

Description copied from interface: RequestCallback

Called when there is an exception on the remote node or timeout happens

Specified by:

onFailure in interface RequestCallback<T>

invokeOnFailure

public boolean invokeOnFailure()

Description copied from interface: RequestCallback

Returns true if the callback handles failure reporting - in which case the remove host will be asked to report failures to us in the event of a problem processing the request. TODO: this is an error prone method, and we should be handling failures everywhere so we should probably just start doing that, and remove this method

Specified by:

invokeOnFailure in interface RequestCallback<T>

Returns:

true if the callback should be invoked on failure