Module

Package org.xnio.channels

Interface SuspendableWriteChannel

All Superinterfaces:

java.lang.AutoCloseable, java.nio.channels.Channel, java.io.Closeable, CloseableChannel, Configurable, java.nio.channels.InterruptibleChannel

All Known Subinterfaces:

BoundMultipointMessageChannel, ConnectedMessageChannel, ConnectedSslStreamChannel, ConnectedStreamChannel, MessageChannel, MulticastMessageChannel, MultipointMessageChannel, StreamChannel, StreamSinkChannel, SuspendableChannel, WritableMessageChannel, WritableMultipointMessageChannel

All Known Implementing Classes:

AssembledConnectedMessageChannel, AssembledConnectedSslStreamChannel, AssembledConnectedStreamChannel, AssembledMessageChannel, AssembledStreamChannel, ConduitStreamSinkChannel, ConduitWritableMessageChannel, FixedLengthStreamSinkChannel, FramedMessageChannel, NullStreamSinkChannel, SplitStreamSinkChannel, TranslatingSuspendableChannel

public interface SuspendableWriteChannel
extends CloseableChannel

A suspendable writable channel. This type of channel is associated with a listener which can suspend and resume writes as needed.

Field Summary

Fields inherited from interface org.xnio.channels.Configurable

EMPTY

Method Summary

Modifier and Type	Method	Description
void	awaitWritable()	Block until this channel becomes writable again.
void	awaitWritable(long time, java.util.concurrent.TimeUnit timeUnit)	Block until this channel becomes writable again, or until the timeout expires.
void	close()	Close this channel.
boolean	flush()	Flush any waiting partial send or write.
ChannelListener.Setter<? extends SuspendableWriteChannel>	getCloseSetter()	Get the setter which can be used to change the close listener for this channel.
ChannelListener.Setter<? extends SuspendableWriteChannel>	getWriteSetter()	Get the setter which can be used to change the write listener for this channel.
XnioExecutor	getWriteThread()	Deprecated. The CloseableChannel.getIoThread() method should be used instead.
boolean	isOpen()	Determine whether this channel is open.
boolean	isWriteResumed()	Determine whether writes are resumed.
void	resumeWrites()	Resume writes on this channel.
void	shutdownWrites()	Indicate that writing is complete for this channel.
void	suspendWrites()	Suspend further write notifications on this channel.
void	wakeupWrites()	Deprecated. Users should instead submit Runnable tasks to the channel thread when this functionality is needed.

Methods inherited from interface org.xnio.channels.CloseableChannel

getIoThread, getWorker

Methods inherited from interface org.xnio.channels.Configurable

getOption, setOption, supportsOption

Method Detail

suspendWrites

void suspendWrites()

Suspend further write notifications on this channel.

resumeWrites

void resumeWrites()

Resume writes on this channel. The write listener will be called as soon as the channel becomes writable.

isWriteResumed

boolean isWriteResumed()

Determine whether writes are resumed.

Returns:

true if writes are resumed, false if writes are suspended

wakeupWrites

@Deprecated
void wakeupWrites()

Deprecated.

Users should instead submit Runnable tasks to the channel thread when this functionality is needed.

Resume writes on this channel, and force the write listener to be triggered even if the channel isn't actually writable.

shutdownWrites

void shutdownWrites()
             throws java.io.IOException

Indicate that writing is complete for this channel. Further attempts to write data to this channel after this method is invoked will result in an exception. If this method was already called, calling this method again will have no additional effect. After this method is called, any remaining data still must be flushed out via the flush() method; once this is done, if the read side of the channel was shut down, the channel will automatically close.

Throws:

java.io.IOException - if an I/O error occurs

awaitWritable

void awaitWritable()
            throws java.io.IOException

Block until this channel becomes writable again. This method may return spuriously before the channel becomes writable.

Throws:

java.io.InterruptedIOException - if the operation is interrupted; the thread's interrupt flag will be set as well

java.io.IOException - if an I/O error occurs

Since:

1.2

awaitWritable

void awaitWritable(long time,
                   java.util.concurrent.TimeUnit timeUnit)
            throws java.io.IOException

Block until this channel becomes writable again, or until the timeout expires. This method may return spuriously before the channel becomes writable or the timeout expires.

Parameters:

time - the time to wait

timeUnit - the time unit

Throws:

java.io.InterruptedIOException - if the operation is interrupted; the thread's interrupt flag will be set as well

java.io.IOException - if an I/O error occurs

Since:

1.2

getWriteThread

@Deprecated
XnioExecutor getWriteThread()

Deprecated.

The CloseableChannel.getIoThread() method should be used instead.

Get the write thread for this channel.

Returns:

the thread, or null if none is configured or available

getWriteSetter

ChannelListener.Setter<? extends SuspendableWriteChannel> getWriteSetter()

Get the setter which can be used to change the write listener for this channel.

Returns:

the setter

Since:

2.0

getCloseSetter

ChannelListener.Setter<? extends SuspendableWriteChannel> getCloseSetter()

Get the setter which can be used to change the close listener for this channel. If the channel is already closed, then the listener will not be called.

Specified by:

getCloseSetter in interface CloseableChannel

Returns:

the setter

flush

boolean flush()
       throws java.io.IOException

Flush any waiting partial send or write. If there is no data to flush, or if the flush completed successfully, this method will return true. If there is data to flush which cannot be immediately written, this method will return false. If this method returns true after shutdownWrites() was called on this channel, the write listener will no longer be invoked on this channel. If this is case and additionally this is a write-only channel or the read side was previously shut down, then the channel will automatically be closed.

Returns:

true if the message was flushed, or false if the result would block

Throws:

java.io.IOException - if an I/O error occurs

isOpen

boolean isOpen()

Determine whether this channel is open. This method will return false if all directions are shut down, even if there is unflushed write data pending.

Specified by:

isOpen in interface java.nio.channels.Channel

Returns:

true if the channel is open, false otherwise

close

void close()
    throws java.io.IOException

Close this channel. If data has been written but not flushed, that data may be discarded, depending on the channel implementation. When a channel is closed, its close listener is invoked. Invoking this method more than once has no additional effect.

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.nio.channels.Channel

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface CloseableChannel

Specified by:

close in interface java.nio.channels.InterruptibleChannel

Throws:

java.io.IOException - if the close failed