org.apache.cassandra.net

Interface RequestCallback<T>

All Known Implementing Classes:

AbstractPaxosCallback, AbstractWriteResponseHandler, AsyncOneResponse, BatchlogResponseHandler, BlockingPartitionRepair, DatacenterSyncWriteResponseHandler, DatacenterWriteResponseHandler, PrepareCallback, ProposeCallback, ReadCallback, TruncateResponseHandler, WriteResponseHandler

public interface RequestCallback<T>

implementors of RequestCallback need to make sure that any public methods are threadsafe with respect to onResponse(org.apache.cassandra.net.Message<T>) being called from the message service. In particular, if any shared state is referenced, making response alone synchronized will not suffice.

Method Summary

Modifier and Type	Method and Description
default boolean	invokeOnFailure()
default void	onFailure(InetAddressAndPort from, RequestFailureReason failureReason) Called when there is an exception on the remote node or timeout happens
void	onResponse(Message<T> msg)
default boolean	trackLatencyForSnitch()

Method Detail

onResponse

void onResponse(Message<T> msg)

Parameters:

msg - response received.

onFailure

default void onFailure(InetAddressAndPort from,
                       RequestFailureReason failureReason)

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

invokeOnFailure

default boolean invokeOnFailure()

Returns:

true if the callback should be invoked on failure

trackLatencyForSnitch

default boolean trackLatencyForSnitch()

Returns:

true if this callback is on the read path and its latency should be given as input to the dynamic snitch.