Package com.yahoo.jdisc.handler

Class FastContentWriter

java.lang.Object

java.util.concurrent.CompletableFuture<Boolean>

com.yahoo.jdisc.handler.FastContentWriter

All Implemented Interfaces:

AutoCloseable, CompletionStage<Boolean>, Future<Boolean>

public class FastContentWriter
extends CompletableFuture<Boolean>
implements AutoCloseable

This class provides a non-blocking, awaitable write-interface to a ContentChannel. The CompletableFuture<Boolean> interface can be used to await the asynchronous completion of all pending operations. Any asynchronous failure will be rethrown when calling either of the get() methods on this class.

Please notice that the Future implementation of this class will NEVER complete unless close() has been called; please use try-with-resources to ensure that close() is called.

Author:

Simon Thoresen Hult

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.CompletableFuture

CompletableFuture.AsynchronousCompletionTask

Constructor Summary

Constructors

Constructor	Description
FastContentWriter(ContentChannel out)	Creates a new FastContentWriter that encapsulates a given ContentChannel.

Method Summary

Modifier and Type	Method	Description
void	addListener(Runnable listener, Executor executor)
boolean	cancel(boolean mayInterruptIfRunning)
void	close()	Closes the underlying ContentChannel.
boolean	isCancelled()
void	write(byte[] buf)	This is a convenience method to convert the given byte array into a ByteBuffer object, and then passing that to write(java.nio.ByteBuffer).
void	write(byte[] buf, int offset, int length)	This is a convenience method to convert a subarray of the given byte array into a ByteBuffer object, and then passing that to write(java.nio.ByteBuffer).
void	write(String str)	This is a convenience method to convert the given string to a ByteBuffer of UTF8 bytes, and then passing that to write(ByteBuffer).
void	write(ByteBuffer buf)	Writes to the underlying ContentChannel.

Methods inherited from class java.util.concurrent.CompletableFuture

acceptEither, acceptEitherAsync, acceptEitherAsync, allOf, anyOf, applyToEither, applyToEitherAsync, applyToEitherAsync, complete, completeAsync, completeAsync, completedFuture, completedStage, completeExceptionally, completeOnTimeout, copy, defaultExecutor, delayedExecutor, delayedExecutor, exceptionally, exceptionallyAsync, exceptionallyAsync, exceptionallyCompose, exceptionallyComposeAsync, exceptionallyComposeAsync, failedFuture, failedStage, get, get, getNow, getNumberOfDependents, handle, handleAsync, handleAsync, isCompletedExceptionally, isDone, join, minimalCompletionStage, newIncompleteFuture, obtrudeException, obtrudeValue, orTimeout, runAfterBoth, runAfterBothAsync, runAfterBothAsync, runAfterEither, runAfterEitherAsync, runAfterEitherAsync, runAsync, runAsync, supplyAsync, supplyAsync, thenAccept, thenAcceptAsync, thenAcceptAsync, thenAcceptBoth, thenAcceptBothAsync, thenAcceptBothAsync, thenApply, thenApplyAsync, thenApplyAsync, thenCombine, thenCombineAsync, thenCombineAsync, thenCompose, thenComposeAsync, thenComposeAsync, thenRun, thenRunAsync, thenRunAsync, toCompletableFuture, toString, whenComplete, whenCompleteAsync, whenCompleteAsync

Methods inherited from class java.lang.Object

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

Constructor Details

FastContentWriter

public FastContentWriter(ContentChannel out)

Creates a new FastContentWriter that encapsulates a given ContentChannel.

Parameters:

out - The ContentChannel to encapsulate.

Throws:

NullPointerException - If the content argument is null.

Method Details

write

public void write(String str)

This is a convenience method to convert the given string to a ByteBuffer of UTF8 bytes, and then passing that to write(ByteBuffer).

Parameters:

str - The string to write.

write

public void write(byte[] buf)

This is a convenience method to convert the given byte array into a ByteBuffer object, and then passing that to write(java.nio.ByteBuffer).

Parameters:

buf - The bytes to write.

write

public void write(byte[] buf,
 int offset,
 int length)

This is a convenience method to convert a subarray of the given byte array into a ByteBuffer object, and then passing that to write(java.nio.ByteBuffer).

Parameters:

buf - The bytes to write.

offset - The offset of the subarray to be used.

length - The length of the subarray to be used.

write

public void write(ByteBuffer buf)

Writes to the underlying ContentChannel. If CompletionHandler.failed(Throwable) is called, either of the get() methods will rethrow that Throwable.

Parameters:

buf - The ByteBuffer to write.

close

public void close()

Closes the underlying ContentChannel. If CompletionHandler.failed(Throwable) is called, either of the get() methods will rethrow that Throwable.

Specified by:

close in interface AutoCloseable

addListener

public void addListener(Runnable listener,
 Executor executor)

cancel

public boolean cancel(boolean mayInterruptIfRunning)

Specified by:

cancel in interface Future<Boolean>

Overrides:

cancel in class CompletableFuture<Boolean>

isCancelled

public boolean isCancelled()

Specified by:

isCancelled in interface Future<Boolean>

Overrides:

isCancelled in class CompletableFuture<Boolean>