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

Class AsynchronousBlockWriterWithCallback

java.lang.Object

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

org.apache.flink.runtime.io.disk.iomanager.AsynchronousFileIOChannel<org.apache.flink.core.memory.MemorySegment,org.apache.flink.runtime.io.disk.iomanager.WriteRequest>

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

All Implemented Interfaces:

BlockChannelWriterWithCallback<org.apache.flink.core.memory.MemorySegment>, FileIOChannel

Direct Known Subclasses:

AsynchronousBlockWriter

public class AsynchronousBlockWriterWithCallback
extends AsynchronousFileIOChannel<org.apache.flink.core.memory.MemorySegment,org.apache.flink.runtime.io.disk.iomanager.WriteRequest>
implements BlockChannelWriterWithCallback<org.apache.flink.core.memory.MemorySegment>

An asynchronous implementation of the BlockChannelWriterWithCallback that queues I/O requests and calls a callback once they have been handled.

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	Description
protected	AsynchronousBlockWriterWithCallback(FileIOChannel.ID channelID, RequestQueue<org.apache.flink.runtime.io.disk.iomanager.WriteRequest> requestQueue, RequestDoneCallback<org.apache.flink.core.memory.MemorySegment> callback)	Creates a new asynchronous block writer for the given channel.

Method Summary

Modifier and Type	Method	Description
void	writeBlock(org.apache.flink.core.memory.MemorySegment segment)	Issues a asynchronous write request to the writer.

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

addRequest, checkErroneous, close, closeAndDelete, handleProcessedBuffer, isClosed, registerAllRequestsProcessedListener

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 Details

AsynchronousBlockWriterWithCallback

protected AsynchronousBlockWriterWithCallback(FileIOChannel.ID channelID,
 RequestQueue<org.apache.flink.runtime.io.disk.iomanager.WriteRequest> requestQueue,
 RequestDoneCallback<org.apache.flink.core.memory.MemorySegment> callback)
                                       throws IOException

Creates a new asynchronous block writer for the given channel.

Parameters:

channelID - The ID of the channel to write to.

requestQueue - The request queue of the asynchronous writer thread, to which the I/O requests are added.

callback - The callback to be invoked when requests are done.

Throws:

IOException - Thrown, if the underlying file channel could not be opened exclusively.

Method Details

writeBlock

public void writeBlock(org.apache.flink.core.memory.MemorySegment segment)
                throws IOException

Issues a asynchronous write request to the writer.

Specified by:

writeBlock in interface BlockChannelWriterWithCallback<org.apache.flink.core.memory.MemorySegment>

Parameters:

segment - The segment to be written.

Throws:

IOException - Thrown, when the writer encounters an I/O error. Due to the asynchronous nature of the writer, the exception thrown here may have been caused by an earlier write request.