org.apache.flink.runtime.io.disk.iomanager

Class AsynchronousBufferFileWriter

java.lang.Object

org.apache.flink.runtime.io.disk.iomanager.AbstractFileIOChannel

org.apache.flink.runtime.io.disk.iomanager.AsynchronousFileIOChannel<Buffer,org.apache.flink.runtime.io.disk.iomanager.WriteRequest>

org.apache.flink.runtime.io.disk.iomanager.AsynchronousBufferFileWriter

All Implemented Interfaces:

BlockChannelWriterWithCallback<Buffer>, BufferFileWriter, FileIOChannel

public class AsynchronousBufferFileWriter
extends AsynchronousFileIOChannel<Buffer,org.apache.flink.runtime.io.disk.iomanager.WriteRequest>
implements BufferFileWriter

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.io.disk.iomanager.FileIOChannel

FileIOChannel.Enumerator, FileIOChannel.ID

Field Summary

Fields inherited from class org.apache.flink.runtime.io.disk.iomanager.AsynchronousFileIOChannel

closed, closeLock, exception, requestQueue, requestsNotReturned, resultHandler

Fields inherited from class org.apache.flink.runtime.io.disk.iomanager.AbstractFileIOChannel

fileChannel, id, LOG

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AsynchronousBufferFileWriter(FileIOChannel.ID channelID, RequestQueue<org.apache.flink.runtime.io.disk.iomanager.WriteRequest> requestQueue)

Method Summary

Modifier and Type	Method and Description
int	getNumberOfOutstandingRequests() Returns the number of outstanding requests.
boolean	registerAllRequestsProcessedListener(NotificationListener listener) Registers a listener to be notified when all outstanding requests have been processed.
void	writeBlock(Buffer buffer) Writes the given block asynchronously.

Methods inherited from class org.apache.flink.runtime.io.disk.iomanager.AsynchronousFileIOChannel

addRequest, checkErroneous, close, closeAndDelete, handleProcessedBuffer, isClosed

Methods inherited from class org.apache.flink.runtime.io.disk.iomanager.AbstractFileIOChannel

deleteChannel, getChannelID, getNioFileChannel, getSize

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.runtime.io.disk.iomanager.FileIOChannel

close, closeAndDelete, deleteChannel, getChannelID, getNioFileChannel, getSize, isClosed

Constructor Detail

AsynchronousBufferFileWriter

protected AsynchronousBufferFileWriter(FileIOChannel.ID channelID,
                                       RequestQueue<org.apache.flink.runtime.io.disk.iomanager.WriteRequest> requestQueue)
                                throws IOException

Throws:

IOException

Method Detail

writeBlock

public void writeBlock(Buffer buffer)
                throws IOException

Writes the given block asynchronously.

Specified by:

writeBlock in interface BlockChannelWriterWithCallback<Buffer>

Parameters:

buffer - the buffer to be written (will be recycled when done)

Throws:

IOException - thrown if adding the write operation fails

getNumberOfOutstandingRequests

public int getNumberOfOutstandingRequests()

Description copied from interface: BufferFileWriter

Returns the number of outstanding requests.

Specified by:

getNumberOfOutstandingRequests in interface BufferFileWriter

registerAllRequestsProcessedListener

public boolean registerAllRequestsProcessedListener(NotificationListener listener)
                                             throws IOException

Description copied from class: AsynchronousFileIOChannel

Registers a listener to be notified when all outstanding requests have been processed.

New requests can arrive right after the listener got notified. Therefore, it is not safe to assume that the number of outstanding requests is still zero after a notification unless there was a close right before the listener got called.

Returns true, if the registration was successful. A registration can fail, if there are no outstanding requests when trying to register a listener.

Specified by:

registerAllRequestsProcessedListener in interface BufferFileWriter

Overrides:

registerAllRequestsProcessedListener in class AsynchronousFileIOChannel<Buffer,org.apache.flink.runtime.io.disk.iomanager.WriteRequest>

Throws:

IOException