Diviner Arcanist Tech Docs PhutilMetricsChannel

final class PhutilMetricsChannel
Arcanist Technical Documentation ()

A PhutilChannelChannel which wraps some other channel and provides metrics about its use (e.g., bytes read and bytes written).

Tasks

Reading and Writing

No methods for this task.

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()

Implementation

public function read()
public function write($message)
public function setName($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()
protected function didConstruct()

Channel Metrics

public function getBytesWritten() — Get the number of bytes that have been written to the channel. This includes any bytes which have been buffered but not actually transmitted, and thus may overreport compared to actual activity on the wire.
public function getBytesRead() — Get the number of bytes that have been read from the channel. This excludes any bytes which have been received but not actually read by anything, and thus may underreport compared to actual activity on the wire.
public function getWallTime() — Get the elapsed wall time since this channel opened.

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 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)
Inherited

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.

PhutilMetricsChannel

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.

PhutilMetricsChannel

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()
Inherited

PhutilChannel

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

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()
Inherited

PhutilChannel

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

Return

bool	True if the channel is open.

public function closeWriteChannel()
Inherited

PhutilChannel

Close the channel for writing.

Return

void

public function isOpenForReading()
Inherited

PhutilChannel

Test if the channel is open for reading.

Return

bool	True if the channel is open for reading.

public function isOpenForWriting()
Inherited

PhutilChannel

Test if the channel is open for writing.

Return

bool	True if the channel is open for writing.

protected function readBytes($length)
Inherited

PhutilChannel

Read from the channel's underlying I/O.

Parameters

int

$length

Maximum number of bytes to read.

Return

string

Bytes, if available.

protected function writeBytes($bytes)
Inherited

PhutilChannel

Write to the channel's underlying I/O.

Parameters

string

$bytes

Bytes to write.

Return

int	Number of bytes written.

protected function getReadSockets()
Inherited

PhutilChannel

Get sockets to select for reading.

Return

list<stream>

Read sockets.

protected function getWriteSockets()
Inherited

PhutilChannel

Get sockets to select for writing.

Return

list<stream>

Write sockets.

public function setReadBufferSize($size)
Inherited

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.

Parameters

int|null

$size

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

Return

this

public function isReadBufferEmpty()
Inherited

PhutilChannel

Test state of the read buffer.

Return

bool	True if the read buffer is empty.

public function isWriteBufferEmpty()
Inherited

PhutilChannel

Test state of the write buffer.

Return

bool	True if the write buffer is empty.

public function getWriteBufferSize()
Inherited

PhutilChannel

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

Return

int	Number of waiting bytes.

public function flush()
Inherited

PhutilChannel

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

Return

wild

protected function didConstruct()

This method is not documented.

Return

wild

protected function getUnderlyingChannel()
Inherited

This method is not documented.

Return

wild

private function throwOnRawByteOperations()
Inherited

This method is not documented.

Return

wild

public function getBytesWritten()

Get the number of bytes that have been written to the channel. This includes any bytes which have been buffered but not actually transmitted, and thus may overreport compared to actual activity on the wire.

Return

int	Bytes written.

public function getBytesRead()

Get the number of bytes that have been read from the channel. This excludes any bytes which have been received but not actually read by anything, and thus may underreport compared to actual activity on the wire.

Return

int	Bytes read.

public function getWallTime()

Get the elapsed wall time since this channel opened.

Return

float

Wall time, in seconds.

Defined: src/channel/PhutilMetricsChannel.php:10
Extends: PhobjectPhutilChannelPhutilChannelChannel

final class PhutilMetricsChannelArcanist Technical Documentation ()

Tasks

Reading and Writing

Waiting for Activity

Responding to Activity

Implementation

Channel Metrics

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)Inherited

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()Inherited

public function setName($name)Inherited

public function getName()Inherited

public function isOpen()Inherited

public function closeWriteChannel()Inherited

public function isOpenForReading()Inherited

public function isOpenForWriting()Inherited

protected function readBytes($length)Inherited

protected function writeBytes($bytes)Inherited

protected function getReadSockets()Inherited

protected function getWriteSockets()Inherited

public function setReadBufferSize($size)Inherited

public function isReadBufferEmpty()Inherited

public function isWriteBufferEmpty()Inherited

public function getWriteBufferSize()Inherited

public function flush()Inherited

protected function didConstruct()

protected function getUnderlyingChannel()Inherited

private function throwOnRawByteOperations()Inherited

public function getBytesWritten()

public function getBytesRead()

public function getWallTime()

final class PhutilMetricsChannel
Arcanist 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 function __construct($channel)
Inherited

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

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

public function update()
Inherited

public function setName($name)
Inherited

public function getName()
Inherited

public function isOpen()
Inherited

public function closeWriteChannel()
Inherited

public function isOpenForReading()
Inherited

public function isOpenForWriting()
Inherited

protected function readBytes($length)
Inherited

protected function writeBytes($bytes)
Inherited

protected function getReadSockets()
Inherited

protected function getWriteSockets()
Inherited

public function setReadBufferSize($size)
Inherited

public function isReadBufferEmpty()
Inherited

public function isWriteBufferEmpty()
Inherited

public function getWriteBufferSize()
Inherited

public function flush()
Inherited

protected function getUnderlyingChannel()
Inherited

private function throwOnRawByteOperations()
Inherited