public final class PushBackStreamChannel extends Object implements StreamSourceChannel, WrappedChannel<StreamSourceChannel>
EMPTY
Constructor and Description |
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PushBackStreamChannel(StreamSourceChannel channel)
Construct a new instance.
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Modifier and Type | Method and Description |
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void |
awaitReadable()
Block until this channel becomes readable again.
|
void |
awaitReadable(long time,
TimeUnit timeUnit)
Block until this channel becomes readable again, or until the timeout expires.
|
void |
close()
Close this channel.
|
StreamSourceChannel |
getChannel()
Get the channel which is wrapped by this object.
|
ChannelListener.Setter<? extends PushBackStreamChannel> |
getCloseSetter()
Get the setter which can be used to change the close listener for this channel.
|
XnioIoThread |
getIoThread()
Get the I/O thread associated with this channel.
|
<T> T |
getOption(Option<T> option)
Get the value of a channel option.
|
ChannelListener.Setter<? extends PushBackStreamChannel> |
getReadSetter()
Get the setter which can be used to change the read listener for this channel.
|
XnioExecutor |
getReadThread()
Deprecated.
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XnioWorker |
getWorker()
Get the worker for this channel.
|
boolean |
isOpen() |
boolean |
isReadResumed()
Determine whether reads are resumed.
|
int |
read(ByteBuffer dst) |
long |
read(ByteBuffer[] dsts) |
long |
read(ByteBuffer[] dsts,
int offset,
int length) |
void |
resumeReads()
Resume reads on this channel.
|
void |
setCloseListener(ChannelListener<? super PushBackStreamChannel> closeListener) |
<T> T |
setOption(Option<T> option,
T value)
Set an option for this channel.
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void |
setReadListener(ChannelListener<? super PushBackStreamChannel> readListener) |
void |
shutdownReads()
Places this readable channel at "end of stream".
|
boolean |
supportsOption(Option<?> option)
Determine whether an option is supported on this channel.
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void |
suspendReads()
Suspend further read notifications on this channel.
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long |
transferTo(long count,
ByteBuffer throughBuffer,
StreamSinkChannel target)
Transfers bytes into the given channel target.
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long |
transferTo(long position,
long count,
FileChannel target)
Transfers bytes into the given file from this channel.
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void |
unget(Pooled<ByteBuffer> buffer)
Re-queue the given pooled buffer into this channel.
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void |
wakeupReads()
Resume reads on this channel, and force the read listener to be triggered even if the
channel isn't actually readable. |
public PushBackStreamChannel(StreamSourceChannel channel)
channel
- the channel to wrappublic void setReadListener(ChannelListener<? super PushBackStreamChannel> readListener)
public void setCloseListener(ChannelListener<? super PushBackStreamChannel> closeListener)
public ChannelListener.Setter<? extends PushBackStreamChannel> getReadSetter()
StreamSourceChannel
getReadSetter
in interface StreamSourceChannel
getReadSetter
in interface SuspendableReadChannel
public ChannelListener.Setter<? extends PushBackStreamChannel> getCloseSetter()
StreamSourceChannel
getCloseSetter
in interface CloseableChannel
getCloseSetter
in interface StreamSourceChannel
getCloseSetter
in interface SuspendableReadChannel
public long transferTo(long position, long count, FileChannel target) throws IOException
StreamSourceChannel
FileChannel.transferFrom(ReadableByteChannel, long, long)
may provide a performance advantage on some platforms.
If the current thread is interrupted when this method is called, it may throw a InterruptedIOException
;
however, if this exception is thrown, the InterruptedIOException.bytesTransferred
field is
guaranteed to be 0.
transferTo
in interface StreamSourceChannel
position
- the position within the file from which the transfer is to begincount
- the number of bytes to be transferredtarget
- the file to write toIOException
- if an I/O error occurspublic long transferTo(long count, ByteBuffer throughBuffer, StreamSinkChannel target) throws IOException
StreamSourceChannel
throughBuffer
parameter's buffer
space. On entry, throughBuffer
will be cleared. On exit, the buffer will be
flipped for emptying, and may possibly be empty or may contain data. If this method returns a value less than
count
, then the remaining data in throughBuffer
may contain data read from this channel which must
be written to target
to complete the operation. Note that using a direct buffer may provide an
intermediate performance gain on platforms without zero-copy facilities.
If the current thread is interrupted when this method is called, it may throw a InterruptedIOException
;
however, if this exception is thrown, the InterruptedIOException.bytesTransferred
field is
guaranteed to be 0.
Note that the return value is the amount of data that was actually transferred to the StreamSinkChannel
.
The actual amount of data read could be larger than this, and can be calculated by adding the return value and
the amount of data left in throughBuffer
.
transferTo
in interface StreamSourceChannel
count
- the number of bytes to be transferredthroughBuffer
- the buffer to copy through.target
- the destination to write toIOException
- if an I/O error occurspublic int read(ByteBuffer dst) throws IOException
read
in interface ReadableByteChannel
IOException
public long read(ByteBuffer[] dsts) throws IOException
read
in interface ScatteringByteChannel
IOException
public long read(ByteBuffer[] dsts, int offset, int length) throws IOException
read
in interface ScatteringByteChannel
IOException
public void unget(Pooled<ByteBuffer> buffer)
buffer
- the buffer to re-queuepublic void suspendReads()
SuspendableReadChannel
suspendReads
in interface SuspendableReadChannel
public void resumeReads()
SuspendableReadChannel
resumeReads
in interface SuspendableReadChannel
public boolean isReadResumed()
SuspendableReadChannel
isReadResumed
in interface SuspendableReadChannel
true
if reads are resumed, false
if reads are suspendedpublic void wakeupReads()
SuspendableReadChannel
Resume reads
on this channel, and force the read listener to be triggered even if the
channel isn't actually readable.wakeupReads
in interface SuspendableReadChannel
public void shutdownReads() throws IOException
SuspendableReadChannel
CloseableChannel.close()
to be called automatically.shutdownReads
in interface SuspendableReadChannel
IOException
- if an I/O error occurspublic void awaitReadable() throws IOException
SuspendableReadChannel
awaitReadable
in interface SuspendableReadChannel
InterruptedIOException
- if the operation is interrupted; the thread's interrupt flag will be set as wellIOException
- if an I/O error occurspublic void awaitReadable(long time, TimeUnit timeUnit) throws IOException
SuspendableReadChannel
awaitReadable
in interface SuspendableReadChannel
time
- the time to waittimeUnit
- the time unitInterruptedIOException
- if the operation is interrupted; the thread's interrupt flag will be set as wellIOException
- if an I/O error occurs@Deprecated public XnioExecutor getReadThread()
SuspendableReadChannel
getReadThread
in interface SuspendableReadChannel
null
if none is configured or availablepublic XnioIoThread getIoThread()
CloseableChannel
getIoThread
in interface CloseableChannel
public XnioWorker getWorker()
CloseableChannel
getWorker
in interface CloseableChannel
public void close() throws IOException
CloseableChannel
close
in interface Closeable
close
in interface AutoCloseable
close
in interface Channel
close
in interface InterruptibleChannel
close
in interface CloseableChannel
IOException
- if the close failedpublic boolean supportsOption(Option<?> option)
Configurable
supportsOption
in interface Configurable
option
- the optiontrue
if it is supportedpublic <T> T getOption(Option<T> option) throws IOException
Configurable
getOption
in interface Configurable
T
- the type of the option valueoption
- the option to getnull
if it is not setIOException
- if an I/O error occurred when reading the optionpublic <T> T setOption(Option<T> option, T value) throws IllegalArgumentException, IOException
Configurable
setOption
in interface Configurable
T
- the type of the option valueoption
- the option to setvalue
- the value of the option to setIllegalArgumentException
- if the value is not acceptable for this optionIOException
- if an I/O error occurred when modifying the optionpublic StreamSourceChannel getChannel()
WrappedChannel
getChannel
in interface WrappedChannel<StreamSourceChannel>
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