org.xnio.conduits

Class BlockingStreamSourceConduit

java.lang.Object

org.xnio.conduits.AbstractConduit<D>

org.xnio.conduits.AbstractSourceConduit<D>

org.xnio.conduits.AbstractStreamSourceConduit<StreamSourceConduit>

org.xnio.conduits.BlockingStreamSourceConduit

All Implemented Interfaces:

Conduit, SourceConduit, StreamSourceConduit

public final class BlockingStreamSourceConduit
extends AbstractStreamSourceConduit<StreamSourceConduit>

A stream source conduit which can switch into and out of blocking mode.

Author:

David M. Lloyd

Field Summary

Fields inherited from class org.xnio.conduits.AbstractConduit

next

Constructor Summary

Constructors

Constructor and Description
BlockingStreamSourceConduit(StreamSourceConduit next) Construct a new instance.

Method Summary

Modifier and Type	Method and Description
boolean	isReadResumed() Determine whether read notifications are currently enabled.
int	read(ByteBuffer dst) Read a sequence of bytes from this conduit to the given buffer.
long	read(ByteBuffer[] dsts, int offs, int len) Read a sequence of bytes from this conduit to the given buffers.
void	resumeReads() Indicate that the conduit's ReadReadyHandler should be invoked as soon as data can be read without blocking.
void	suspendReads() Indicate that calling the conduit's ReadReadyHandler should be suspended.
long	transferTo(long count, ByteBuffer throughBuffer, StreamSinkChannel target) Transfers bytes into the given channel target.
long	transferTo(long position, long count, FileChannel target) Transfers bytes into the given file from this channel.
void	wakeupReads() Indicate that the conduit's ReadReadyHandler should be invoked immediately, and then again as soon as data can be read without blocking.

Methods inherited from class org.xnio.conduits.AbstractSourceConduit

awaitReadable, awaitReadable, getReadThread, isReadShutdown, setReadReadyHandler, terminateReads

Methods inherited from class org.xnio.conduits.AbstractConduit

getWorker

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.xnio.conduits.SourceConduit

awaitReadable, awaitReadable, getReadThread, isReadShutdown, setReadReadyHandler, terminateReads

Methods inherited from interface org.xnio.conduits.Conduit

getWorker

Constructor Detail

BlockingStreamSourceConduit

public BlockingStreamSourceConduit(StreamSourceConduit next)

Construct a new instance.

Parameters:

next - the delegate conduit to set

Method Detail

transferTo

public long transferTo(long position,
                       long count,
                       FileChannel target)
                throws IOException

Description copied from interface: StreamSourceConduit

Transfers bytes into the given file from this channel.

Specified by:

transferTo in interface StreamSourceConduit

Overrides:

transferTo in class AbstractStreamSourceConduit<StreamSourceConduit>

Parameters:

position - the position within the file from which the transfer is to begin

count - the number of bytes to be transferred

target - the file to write to

Returns:

the number of bytes (possibly 0) that were actually transferred

Throws:

IOException - if an I/O error occurs

transferTo

public long transferTo(long count,
                       ByteBuffer throughBuffer,
                       StreamSinkChannel target)
                throws IOException

Description copied from interface: StreamSourceConduit

Transfers bytes into the given channel target. 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.

Specified by:

transferTo in interface StreamSourceConduit

Overrides:

transferTo in class AbstractStreamSourceConduit<StreamSourceConduit>

Parameters:

count - the number of bytes to be transferred

throughBuffer - the buffer to copy through.

target - the destination to write to

Returns:

the number of bytes (possibly 0) that were actually transferred, or -1 if the end of input was reached

Throws:

IOException - if an I/O error occurs

read

public int read(ByteBuffer dst)
         throws IOException

Description copied from interface: StreamSourceConduit

Read a sequence of bytes from this conduit to the given buffer.

Specified by:

read in interface StreamSourceConduit

Overrides:

read in class AbstractStreamSourceConduit<StreamSourceConduit>

Returns:

the number of bytes (possibly 0) that were actually transferred, or -1 if the end of input was reached or this conduit's SourceConduit.terminateReads() method was previously called

Throws:

IOException - if an error occurs

read

public long read(ByteBuffer[] dsts,
                 int offs,
                 int len)
          throws IOException

Description copied from interface: StreamSourceConduit

Read a sequence of bytes from this conduit to the given buffers.

Specified by:

read in interface StreamSourceConduit

Overrides:

read in class AbstractStreamSourceConduit<StreamSourceConduit>

offs - the offset into the buffer array

len - the number of buffers to fill

Returns:

the number of bytes (possibly 0) that were actually transferred, or -1 if the end of input was reached or this conduit's SourceConduit.terminateReads() method was previously called

Throws:

IOException - if an error occurs

resumeReads

public void resumeReads()

Description copied from interface: SourceConduit

Indicate that the conduit's ReadReadyHandler should be invoked as soon as data can be read without blocking.

Specified by:

resumeReads in interface SourceConduit

Overrides:

resumeReads in class AbstractSourceConduit<StreamSourceConduit>

wakeupReads

public void wakeupReads()

Description copied from interface: SourceConduit

Indicate that the conduit's ReadReadyHandler should be invoked immediately, and then again as soon as data can be read without blocking.

Specified by:

wakeupReads in interface SourceConduit

Overrides:

wakeupReads in class AbstractSourceConduit<StreamSourceConduit>

suspendReads

public void suspendReads()

Description copied from interface: SourceConduit

Indicate that calling the conduit's ReadReadyHandler should be suspended.

Specified by:

suspendReads in interface SourceConduit

Overrides:

suspendReads in class AbstractSourceConduit<StreamSourceConduit>

isReadResumed

public boolean isReadResumed()

Description copied from interface: SourceConduit

Determine whether read notifications are currently enabled.

Specified by:

isReadResumed in interface SourceConduit

Overrides:

isReadResumed in class AbstractSourceConduit<StreamSourceConduit>

Returns:

true if read notifications are enabled