final class PhabricatorMetronome
Phorge Technical Documentation ()

Tick at a given frequency with a specifiable offset.

One use case for this is to flatten out load spikes caused by periodic service calls. Give each host a metronome that ticks at the same frequency, but with different offsets. Then, have hosts make service calls only after their metronome ticks. This spreads service calls out evenly more quickly and more predictably than adding random jitter.

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 setOffset($offset)

This method is not documented.

Parameters

$offset

Return

wild

public function setFrequency($frequency)

This method is not documented.

Parameters

$frequency

Return

wild

public function setOffsetFromSeed($seed)

This method is not documented.

Parameters

$seed

Return

wild

public function getFrequency()

This method is not documented.

Return

wild

public function getOffset()

This method is not documented.

Return

wild

public function getNextTickAfter($epoch)

This method is not documented.

Parameters

$epoch

Return

wild

public function didTickBetween($min, $max)

This method is not documented.

Parameters

	$min
	$max

Return

wild

Defined: src/infrastructure/util/PhabricatorMetronome.php:12
Extends: Phobject

final class PhabricatorMetronomePhorge Technical Documentation ()

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 setOffset($offset)

public function setFrequency($frequency)

public function setOffsetFromSeed($seed)

public function getFrequency()

public function getOffset()

public function getNextTickAfter($epoch)

public function didTickBetween($min, $max)

final class PhabricatorMetronome
Phorge 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