org.apache.cassandra.service

Class AbstractWriteResponseHandler<T>

java.lang.Object

org.apache.cassandra.service.AbstractWriteResponseHandler<T>

All Implemented Interfaces:

IAsyncCallback<T>, IAsyncCallbackWithFailure<T>

Direct Known Subclasses:

BatchlogResponseHandler, DatacenterSyncWriteResponseHandler, WriteResponseHandler

public abstract class AbstractWriteResponseHandler<T>
extends java.lang.Object
implements IAsyncCallbackWithFailure<T>

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.Runnable	callback
ConsistencyLevel	consistencyLevel
protected Keyspace	keyspace
protected static org.slf4j.Logger	logger
protected java.util.Collection<java.net.InetAddress>	naturalEndpoints
protected java.util.Collection<java.net.InetAddress>	pendingEndpoints
protected WriteType	writeType

Fields inherited from interface org.apache.cassandra.net.IAsyncCallback

isAlive

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractWriteResponseHandler(Keyspace keyspace, java.util.Collection<java.net.InetAddress> naturalEndpoints, java.util.Collection<java.net.InetAddress> pendingEndpoints, ConsistencyLevel consistencyLevel, java.lang.Runnable callback, WriteType writeType, long queryStartNanoTime)

Method Summary

Modifier and Type	Method and Description
protected abstract int	ackCount()
void	assureSufficientLiveNodes()
long	currentTimeout()
void	get()
void	onFailure(java.net.InetAddress from, RequestFailureReason failureReason) Called when there is an exception on the remote node or timeout happens
abstract void	response(MessageIn<T> msg) null message means "response from local write"
void	setSupportsBackPressure(boolean supportsBackPressure)
protected void	signal()
boolean	supportsBackPressure()
protected int	totalBlockFor()
protected int	totalEndpoints()
protected boolean	waitingFor(java.net.InetAddress from)

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.IAsyncCallback

isLatencyForSnitch

Field Detail

logger

protected static final org.slf4j.Logger logger

keyspace

protected final Keyspace keyspace

naturalEndpoints

protected final java.util.Collection<java.net.InetAddress> naturalEndpoints

consistencyLevel

public final ConsistencyLevel consistencyLevel

callback

protected final java.lang.Runnable callback

pendingEndpoints

protected final java.util.Collection<java.net.InetAddress> pendingEndpoints

writeType

protected final WriteType writeType

Constructor Detail

AbstractWriteResponseHandler

protected AbstractWriteResponseHandler(Keyspace keyspace,
                                       java.util.Collection<java.net.InetAddress> naturalEndpoints,
                                       java.util.Collection<java.net.InetAddress> pendingEndpoints,
                                       ConsistencyLevel consistencyLevel,
                                       java.lang.Runnable callback,
                                       WriteType writeType,
                                       long queryStartNanoTime)

Parameters:

callback - A callback to be called when the write is successful.

queryStartNanoTime -

Method Detail

get

public void get()
         throws WriteTimeoutException,
                WriteFailureException

Throws:

WriteTimeoutException

WriteFailureException

currentTimeout

public final long currentTimeout()

totalBlockFor

protected int totalBlockFor()

Returns:

the minimum number of endpoints that must reply.

totalEndpoints

protected int totalEndpoints()

Returns:

the total number of endpoints the request has been sent to.

waitingFor

protected boolean waitingFor(java.net.InetAddress from)

Returns:

true if the message counts towards the totalBlockFor() threshold

ackCount

protected abstract int ackCount()

Returns:

number of responses received

response

public abstract void response(MessageIn<T> msg)

null message means "response from local write"

Specified by:

response in interface IAsyncCallback<T>

Parameters:

msg - response received.

assureSufficientLiveNodes

public void assureSufficientLiveNodes()
                               throws UnavailableException

Throws:

UnavailableException

signal

protected void signal()

onFailure

public void onFailure(java.net.InetAddress from,
                      RequestFailureReason failureReason)

Description copied from interface: IAsyncCallbackWithFailure

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

Specified by:

onFailure in interface IAsyncCallbackWithFailure<T>

supportsBackPressure

public boolean supportsBackPressure()

Specified by:

supportsBackPressure in interface IAsyncCallback<T>

setSupportsBackPressure

public void setSupportsBackPressure(boolean supportsBackPressure)