Diviner libphutil Tech Docs PhutilChannelChannel

abstract class PhutilChannelChannel
libphutil Technical Documentation ()

Channel that wraps some other channel. This class is not interesting on its own and just serves as a no-op proxy, but extending it allows you to compose channels to mutate their characteristics (for instance, to add protocol semantics with PhutilProtocolChannel).

The implementation of this class is entirely uninteresting.

Tasks

Reading and Writing

public function read()
public function write($message)

Waiting for Activity

public static function waitForAny($channels, $options) — Wait for any activity on a list of channels. Convenience wrapper around @{method:waitForActivity}.
public static function waitForActivity($reads, $writes, $options) — Wait (using select()) for channels to become ready for reads or writes. This method blocks until some channel is ready to be updated.

Responding to Activity

public function update()

Channel Implementation

public function setName($name) — Set a channel name. This is primarily intended to allow you to debug channel code more easily, by naming channels something meaningful.
public function getName() — Get the channel name, as set by @{method:setName}.
public function isOpen()
public function closeWriteChannel()
public function isOpenForReading()
public function isOpenForWriting()
protected function readBytes($length)
protected function writeBytes($bytes)
protected function getReadSockets()
protected function getWriteSockets()
public function setReadBufferSize($size)
public function isReadBufferEmpty()
public function isWriteBufferEmpty()
public function getWriteBufferSize()
public function flush()

Other Methods

public function __get($name)
public function __set($name, $value)
public function current()
public function key()
public function next()
public function rewind()
public function valid()
private function throwOnAttemptedIteration()
public function getPhobjectClassConstant($key, $byte_limit) — Read the value of a class constant.
public function __construct($channel)
protected function didConstruct()
protected function getUnderlyingChannel()
private function throwOnRawByteOperations()

Methods

public function __get($name)
Inherited

This method is not documented.

Parameters

$name

Return

wild

public function __set($name, $value)
Inherited

This method is not documented.

Parameters

	$name
	$value

Return

wild

public function current()
Inherited

This method is not documented.

Return

wild

public function key()
Inherited

This method is not documented.

Return

wild

public function next()
Inherited

This method is not documented.

Return

wild

public function rewind()
Inherited

This method is not documented.

Return

wild

public function valid()
Inherited

This method is not documented.

Return

wild

private function throwOnAttemptedIteration()
Inherited

This method is not documented.

Return

wild

public function getPhobjectClassConstant($key, $byte_limit)
Inherited

Phobject

Read the value of a class constant.

This is the same as just typing self::CONSTANTNAME, but throws a more useful message if the constant is not defined and allows the constant to be limited to a maximum length.

Parameters

string	$key	Name of the constant.
int\|null	$byte_limit	Maximum number of bytes permitted in the value.

Return

string

Value of the constant.

public function __construct($channel)

This method is not documented.

Return

this	//Implicit.//

public function read()

PhutilChannel

Read from the channel. A channel defines the format of data that is read from it, so this method may return strings, objects, or anything else.

The default implementation returns bytes.

PhutilChannelChannel

This method is not documented.

Return

wild	Data from the channel, normally bytes.

public function write($message)

PhutilChannel

Write to the channel. A channel defines what data format it accepts, so this method may take strings, objects, or anything else.

The default implementation accepts bytes.

PhutilChannelChannel

This method is not documented.

Parameters

wild

$bytes

Data to write to the channel, normally bytes.

Return

this

public static function waitForAny($channels, $options)
Inherited

PhutilChannel

Wait for any activity on a list of channels. Convenience wrapper around waitForActivity().

Parameters

list<PhutilChannel>	$channels	A list of channels to wait for.
dict	$options	Options, see above.

Return

void

public static function waitForActivity($reads, $writes, $options)
Inherited

PhutilChannel

Wait (using select()) for channels to become ready for reads or writes. This method blocks until some channel is ready to be updated.

It does not provide a way to determine which channels are ready to be updated. The expectation is that you'll just update every channel. This might change eventually.

Available options are:

'read' (list<stream>) Additional streams to select for read.
'write' (list<stream>) Additional streams to select for write.
'except' (list<stream>) Additional streams to select for except.
'timeout' (float) Select timeout, defaults to 1.

NOTE: Extra streams must be streams, not sockets, because this method uses stream_select(), not socket_select().

Parameters

list<PhutilChannel>	$reads	List of channels to wait for reads on.
list<PhutilChannel>	$writes	List of channels to wait for writes on.
array	$options

Return

void

public function update()

PhutilChannel

Updates the channel, filling input buffers and flushing output buffers. Returns false if the channel has closed.

PhutilChannelChannel

This method is not documented.

Return

bool	True if the channel is still open.

public function setName($name)
Inherited

PhutilChannel

Set a channel name. This is primarily intended to allow you to debug channel code more easily, by naming channels something meaningful.

Parameters

string

$name

Channel name.

Return

this

public function getName()
Inherited

PhutilChannel

Get the channel name, as set by setName().

Return

string

Name of the channel.

public function isOpen()

PhutilChannel

Test if the channel is open: active, can be read from and written to, etc.

PhutilChannelChannel

This method is not documented.

Return

bool	True if the channel is open.

public function closeWriteChannel()

PhutilChannel

Close the channel for writing.

PhutilChannelChannel

This method is not documented.

Return

void

public function isOpenForReading()

PhutilChannel

Test if the channel is open for reading.

PhutilChannelChannel

This method is not documented.

Return

bool	True if the channel is open for reading.

public function isOpenForWriting()

PhutilChannel

Test if the channel is open for writing.

PhutilChannelChannel

This method is not documented.

Return

bool	True if the channel is open for writing.

protected function readBytes($length)

PhutilChannel

Read from the channel's underlying I/O.

PhutilChannelChannel

This method is not documented.

Parameters

int

$length

Maximum number of bytes to read.

Return

string

Bytes, if available.

protected function writeBytes($bytes)

PhutilChannel

Write to the channel's underlying I/O.

PhutilChannelChannel

This method is not documented.

Parameters

string

$bytes

Bytes to write.

Return

int	Number of bytes written.

protected function getReadSockets()

PhutilChannel

Get sockets to select for reading.

PhutilChannelChannel

This method is not documented.

Return

list<stream>

Read sockets.

protected function getWriteSockets()

PhutilChannel

Get sockets to select for writing.

PhutilChannelChannel

This method is not documented.

Return

list<stream>

Write sockets.

public function setReadBufferSize($size)

PhutilChannel

Set the maximum size of the channel's read buffer. Reads will artificially block once the buffer reaches this size until the in-process buffer is consumed.

PhutilChannelChannel

This method is not documented.

Parameters

int|null

$size

Maximum read buffer size, or `null` for a limitless buffer.

Return

this

public function isReadBufferEmpty()

PhutilChannel

Test state of the read buffer.

PhutilChannelChannel

This method is not documented.

Return

bool	True if the read buffer is empty.

public function isWriteBufferEmpty()

PhutilChannel

Test state of the write buffer.

PhutilChannelChannel

This method is not documented.

Return

bool	True if the write buffer is empty.

public function getWriteBufferSize()

PhutilChannel

Get the number of bytes we're currently waiting to write.

PhutilChannelChannel

This method is not documented.

Return

int	Number of waiting bytes.

public function flush()

PhutilChannel

Wait for any buffered writes to complete. This is a blocking call. When the call returns, the write buffer will be empty.

PhutilChannelChannel

This method is not documented.

Return

wild

protected function didConstruct()

This method is not documented.

Return

wild

protected function getUnderlyingChannel()

This method is not documented.

Return

wild

private function throwOnRawByteOperations()

This method is not documented.

Return

wild

Defined: src/channel/PhutilChannelChannel.php:11
Extends: PhobjectPhutilChannel

abstract class PhutilChannelChannellibphutil Technical Documentation ()

Tasks

Reading and Writing

Waiting for Activity

Responding to Activity

Channel Implementation

Other Methods

Methods

public function __get($name)Inherited

public function __set($name, $value)Inherited

public function current()Inherited

public function key()Inherited

public function next()Inherited

public function rewind()Inherited

public function valid()Inherited

private function throwOnAttemptedIteration()Inherited

public function getPhobjectClassConstant($key, $byte_limit)Inherited

public function __construct($channel)

public function read()

public function write($message)

public static function waitForAny($channels, $options)Inherited

public static function waitForActivity($reads, $writes, $options)Inherited

public function update()

public function setName($name)Inherited

public function getName()Inherited

public function isOpen()

public function closeWriteChannel()

public function isOpenForReading()

public function isOpenForWriting()

protected function readBytes($length)

protected function writeBytes($bytes)

protected function getReadSockets()

protected function getWriteSockets()

public function setReadBufferSize($size)

public function isReadBufferEmpty()

public function isWriteBufferEmpty()

public function getWriteBufferSize()

public function flush()

protected function didConstruct()

protected function getUnderlyingChannel()

private function throwOnRawByteOperations()

abstract class PhutilChannelChannel
libphutil Technical Documentation ()

public function __get($name)
Inherited

public function __set($name, $value)
Inherited

public function current()
Inherited

public function key()
Inherited

public function next()
Inherited

public function rewind()
Inherited

public function valid()
Inherited

private function throwOnAttemptedIteration()
Inherited

public function getPhobjectClassConstant($key, $byte_limit)
Inherited

public static function waitForAny($channels, $options)
Inherited

public static function waitForActivity($reads, $writes, $options)
Inherited

public function setName($name)
Inherited

public function getName()
Inherited