core\task\tag_cron_task Class Reference

Simple task to run the tag cron. More...

Inheritance diagram for core\task\tag_cron_task:

Public Member Functions
	bulk_delete_instances ($instances)
	This function will delete numerous tag instances efficiently.
	can_run ()
	Informs whether this task can be run.
	cleanup ()
	Clean up the tag tables, making sure all tagged object still exists.
	compute_correlations ($mincorrelation=2)
	Calculates and stores the correlated tags of all tags.
	disable ()
	Disable the task.
	enable ()
	Enable the task.
	eval_cron_field ($field, $min, $max)
	Take a cron field definition and return an array of valid numbers with the range min-max.
	execute ()
	Do the job.
	get_component ()
	Getter for $component.
	get_cron_lock ()
	Get the current lock for the entire cron.
	get_day ()
	Getter for $day.
	get_day_of_week ()
	Getter for $dayofweek.
	get_disabled ()
	Getter for $disabled.
	get_fail_delay ()
	Getter for $faildelay.
	get_hostname ()
	Getter for $hostname.
	get_hour ()
	Getter for $hour.
	get_last_run_time ()
	Get the last run time for this scheduled task.
	get_lock ()
	Get the current lock for this task.
	get_minute ()
	Getter for $minute.
	get_month ()
	Getter for $month.
	get_name ()
	Get a descriptive name for this task (shown to admins).
	get_next_run_time ()
	Get the next run time for this task.
	get_next_scheduled_time (int $now=0)
	Calculate when this task should next be run based on the schedule.
	get_pid ()
	Getter for $pid.
	get_run_if_component_disabled ()
	Override this function if you want this scheduled task to run, even if the component is disabled.
	get_runtime ()
	Returns task runtime.
	get_runtime_result ()
	Returns if the task has been running for too long.
	get_timestarted ()
	Getter for $timestarted.
	has_default_configuration ()
	Determine if this task is using its default configuration changed from the default.
replacement	is_blocking ()
	is_component_enabled ()
	Informs whether the task's component is enabled.
	is_customised ()
	Has this task been changed from it's default config?
	is_enabled ()
	Checks whether the component and the task disabled flag enables to run this task.
	is_overridden ()
	Has this task been changed from it's default config?
	is_valid (string $field)
	Informs whether the given field is valid.
	process_computed_correlation (stdClass $tagcorrelation)
	This function processes a tag correlation and makes changes in the database as required.
replacement	set_blocking ($blocking)
	set_component ($component)
	Setter for $component.
	set_cron_lock (\core\lock\lock $lock)
	Set the current lock for the entire cron process.
	set_customised ($customised)
	Set customised for this scheduled task.
	set_day ($day)
	Setter for $day.
	set_day_of_week ($dayofweek, $expandr=true)
	Setter for $dayofweek.
	set_disabled ($disabled)
	Setter for $disabled.
	set_fail_delay ($faildelay)
	Setter for $faildelay.
	set_hostname ($hostname=null)
	Setter for $hostname.
	set_hour ($hour, $expandr=true)
	Setter for $hour.
	set_last_run_time ($lastruntime)
	Set the last run time for this scheduled task.
	set_lock (\core\lock\lock $lock)
	Set the current lock for this task.
	set_minute ($minute, $expandr=true)
	Setter for $minute.
	set_month ($month)
	Setter for $month.
	set_next_run_time ($nextruntime)
	Set the next run time for this task.
	set_overridden (bool $overridden)
	Set the overridden value.
	set_pid ($pid=null)
	Setter for $pid.
	set_timestarted ($timestarted=null)
	Setter for $timestarted.

Static Public Member Functions
static	get_html_id (string $classname)
	Produces a valid id string to use as id attribute based on the given FQCN class name.

Public Attributes
replacement	: null
	Setter for $blocking.
replacement	: null
	Getter for $blocking.
const	DAYMAX = 31
	Maximum day of month value.
const	DAYMIN = 1
	Minimum day of month value.
const	DAYOFWEEKMAX = 6
	Maximum dayofweek value.
const	DAYOFWEEKMAXINPUT = 7
	Maximum dayofweek value allowed in input (7 = 0).
const	DAYOFWEEKMIN = 0
	Minimum dayofweek value.
const	FIELD_DAY = 'day'
	Day-of-month field identifier.
const	FIELD_DAYOFWEEK = 'dayofweek'
	Day-of-week field identifier.
const	FIELD_HOUR = 'hour'
	Hour field identifier.
const	FIELD_MINUTE = 'minute'
	Minute field identifier.
const	FIELD_MONTH = 'month'
	Month field identifier.
const	HOURMAX = 23
	Maximum hour value.
const	HOURMIN = 0
	Minimum hour value.
const	MINUTEMAX = 59
	Maximum minute value.
const	MINUTEMIN = 0
	Minimum minute value.
const	MONTHMAX = 12
	Maximum month value.
const	MONTHMIN = 1
	Minimum month value.
const	NEVER_RUN_TIME = 7952342400
	Time used for the next scheduled time when a task should never run.
replacement	reason: 'Blocking tasks are no longer supported'
replacement	since: '4.4'

Protected Member Functions
	get_next_scheduled_time_inner (int $now, array $validminutes, array $validhours, array $validdays, array $validdaysofweek, array $validmonths, int $originalyear=0)
	Recursively calculate the next valid time for this task.

Detailed Description

Simple task to run the tag cron.

Member Function Documentation

bulk_delete_instances()

core\task\tag_cron_task::bulk_delete_instances

(

$instances

)

This function will delete numerous tag instances efficiently.

This removes tag instances only. It doesn't check to see if it is the last use of a tag.

Parameters

array

$instances

An array of tag instance objects with the addition of the tagname and tagrawname (used for recording a delete event).

can_run()

core\task\scheduled_task::can_run ( )

inherited

Informs whether this task can be run.

Return values

bool	true when this task can be run. false otherwise.

Reimplemented in cachestore_redis\task\ttl.

cleanup()

core\task\tag_cron_task::cleanup

(

)

Clean up the tag tables, making sure all tagged object still exists.

This method is called from cron.

This should normally not be necessary, but in case related tags are not deleted when the tagged record is removed, this should be done once in a while, perhaps on an occasional cron run. On a site with lots of tags, this could become an expensive function to call.

compute_correlations()

core\task\tag_cron_task::compute_correlations

(

$mincorrelation = 2

)

Calculates and stores the correlated tags of all tags.

The correlations are stored in the 'tag_correlation' table.

Two tags are correlated if they appear together a lot. Ex.: Users tagged with "computers" will probably also be tagged with "algorithms".

The rationale for the 'tag_correlation' table is performance. It works as a cache for a potentially heavy load query done at the 'tag_instance' table. So, the 'tag_correlation' table stores redundant information derived from the 'tag_instance' table.

Parameters

int

$mincorrelation

Only tags with more than $mincorrelation correlations will be identified.

eval_cron_field()

core\task\scheduled_task::eval_cron_field ( $field, $min, $max )

inherited

Take a cron field definition and return an array of valid numbers with the range min-max.

Parameters

string	$field	- The field definition.
int	$min	- The minimum allowable value.
int	$max	- The maximum allowable value.

Return values

array(int)

execute()

core\task\tag_cron_task::execute

(

)

Do the job.

Throw exceptions on errors (the job will be retried).

Reimplemented from core\task\task_base.

get_component()

core\task\task_base::get_component ( )

inherited

Getter for $component.

Return values

string

get_cron_lock()

core\task\task_base::get_cron_lock ( )

inherited

Get the current lock for the entire cron.

Return values

core\lock\lock

get_day()

core\task\scheduled_task::get_day ( )

inherited

Getter for $day.

Return values

string

get_day_of_week()

core\task\scheduled_task::get_day_of_week ( )

inherited

Getter for $dayofweek.

Return values

string

get_disabled()

core\task\scheduled_task::get_disabled ( )

inherited

Getter for $disabled.

Return values

bool

get_fail_delay()

core\task\task_base::get_fail_delay ( )

inherited

Getter for $faildelay.

Return values

int

get_hostname()

core\task\task_base::get_hostname ( )

inherited

Getter for $hostname.

Return values

string

get_hour()

core\task\scheduled_task::get_hour ( )

inherited

Getter for $hour.

Return values

string

get_html_id()

static core\task\scheduled_task::get_html_id ( string $classname )

staticinherited

Produces a valid id string to use as id attribute based on the given FQCN class name.

Parameters

string

$classname

FQCN of a task.

Return values

string

valid string to be used as id attribute.

get_last_run_time()

core\task\scheduled_task::get_last_run_time ( )

inherited

Get the last run time for this scheduled task.

Return values

int

get_lock()

core\task\task_base::get_lock ( )

inherited

Get the current lock for this task.

Return values

core\lock\lock

get_minute()

core\task\scheduled_task::get_minute ( )

inherited

Getter for $minute.

Return values

string

get_month()

core\task\scheduled_task::get_month ( )

inherited

Getter for $month.

Return values

string

get_name()

core\task\tag_cron_task::get_name

(

)

Get a descriptive name for this task (shown to admins).

Return values

string

Reimplemented from core\task\task_base.

get_next_run_time()

core\task\task_base::get_next_run_time ( )

inherited

Get the next run time for this task.

Return values

int

timestamp

get_next_scheduled_time()

core\task\scheduled_task::get_next_scheduled_time ( int $now = 0 )

inherited

Calculate when this task should next be run based on the schedule.

Parameters

int

$now

Current time, for testing (leave 0 to use default time)

Return values

int\$nextruntime,.

get_next_scheduled_time_inner()

core\task\scheduled_task::get_next_scheduled_time_inner ( int $now, array $validminutes, array $validhours, array $validdays, array $validdaysofweek, array $validmonths, int $originalyear = 0 )

protectedinherited

Recursively calculate the next valid time for this task.

Parameters

int	$now	Start time
array	$validminutes	Valid minutes
array	$validhours	Valid hours
array	$validdays	Valid days
array	$validdaysofweek	Valid days of week
array	$validmonths	Valid months
int	$originalyear	Zero for first call, original year for recursive calls

Return values

int	Next run time

get_pid()

core\task\task_base::get_pid ( )

inherited

Getter for $pid.

Return values

int

get_run_if_component_disabled()

core\task\scheduled_task::get_run_if_component_disabled ( )

inherited

Override this function if you want this scheduled task to run, even if the component is disabled.

Return values

bool

get_runtime()

core\task\task_base::get_runtime ( )

inherited

Returns task runtime.

Return values

int

get_runtime_result()

core\task\task_base::get_runtime_result ( )

inherited

Returns if the task has been running for too long.

Return values

result

get_timestarted()

core\task\task_base::get_timestarted ( )

inherited

Getter for $timestarted.

Return values

int

has_default_configuration()

core\task\scheduled_task::has_default_configuration ( )

inherited

Determine if this task is using its default configuration changed from the default.

Returns true if it is and false otherwise. Does not rely on the customised field.

Return values

bool

is_component_enabled()

core\task\task_base::is_component_enabled ( )

inherited

Informs whether the task's component is enabled.

Return values

bool	true when enabled. false otherwise.

is_customised()

core\task\scheduled_task::is_customised ( )

inherited

Has this task been changed from it's default config?

Return values

bool

is_enabled()

core\task\scheduled_task::is_enabled ( )

inherited

Checks whether the component and the task disabled flag enables to run this task.

This do not checks whether the task manager allows running them or if the site allows tasks to "run now".

Return values

bool	true if task is enabled. false otherwise.

is_overridden()

core\task\scheduled_task::is_overridden ( )

inherited

Has this task been changed from it's default config?

Return values

bool

is_valid()

core\task\scheduled_task::is_valid ( string $field )

inherited

Informs whether the given field is valid.

Use the constants FIELD_* to identify the field. Have to be called after the method set_{field}(string).

Parameters

string

$field

field identifier; expected values from constants FIELD_*.

Return values

bool	true if given field is valid. false otherwise.

process_computed_correlation()

core\task\tag_cron_task::process_computed_correlation

(

stdClass

$tagcorrelation

)

This function processes a tag correlation and makes changes in the database as required.

The tag correlation object needs have both a tagid property and a correlatedtags property that is an array.

Parameters

stdClass

$tagcorrelation

Return values

int/bool

The id of the tag correlation that was just processed or false.

set_component()

core\task\task_base::set_component ( $component )

inherited

Setter for $component.

Parameters

string

$component

set_cron_lock()

core\task\task_base::set_cron_lock ( \core\lock\lock $lock )

inherited

Set the current lock for the entire cron process.

Parameters

core\lock\lock

$lock

set_customised()

core\task\scheduled_task::set_customised ( $customised )

inherited

Set customised for this scheduled task.

Parameters

bool

set_day()

core\task\scheduled_task::set_day ( $day )

inherited

Setter for $day.

Parameters

string

$day

set_day_of_week()

core\task\scheduled_task::set_day_of_week ( $dayofweek, $expandr = true )

inherited

Setter for $dayofweek.

Parameters

string	$dayofweek
bool	$expandr	- if true (default) an 'R' value in a time is expanded to an appropriate int. If false, they are left as 'R'

set_disabled()

core\task\scheduled_task::set_disabled ( $disabled )

inherited

Setter for $disabled.

Parameters

bool

$disabled

set_fail_delay()

core\task\task_base::set_fail_delay ( $faildelay )

inherited

Setter for $faildelay.

Parameters

int

$faildelay

set_hostname()

core\task\task_base::set_hostname ( $hostname = null )

inherited

Setter for $hostname.

Parameters

string

$hostname

set_hour()

core\task\scheduled_task::set_hour ( $hour, $expandr = true )

inherited

Setter for $hour.

Accepts a special 'R' value which will be translated to a random hour.

Parameters

string	$hour
bool	$expandr	- if true (default) an 'R' value in a time is expanded to an appropriate int. If false, they are left as 'R'

set_last_run_time()

core\task\scheduled_task::set_last_run_time ( $lastruntime )

inherited

Set the last run time for this scheduled task.

Parameters

int

$lastruntime

set_lock()

core\task\task_base::set_lock ( \core\lock\lock $lock )

inherited

Set the current lock for this task.

Parameters

core\lock\lock

$lock

set_minute()

core\task\scheduled_task::set_minute ( $minute, $expandr = true )

inherited

Setter for $minute.

Accepts a special 'R' value which will be translated to a random minute.

Parameters

string	$minute
bool	$expandr	- if true (default) an 'R' value in a time is expanded to an appropriate int. If false, they are left as 'R'

set_month()

core\task\scheduled_task::set_month ( $month )

inherited

Setter for $month.

Parameters

string

$month

set_next_run_time()

core\task\task_base::set_next_run_time ( $nextruntime )

inherited

Set the next run time for this task.

Parameters

int

$nextruntime

set_overridden()

core\task\scheduled_task::set_overridden ( bool $overridden )

inherited

Set the overridden value.

Parameters

bool

$overridden

set_pid()

core\task\task_base::set_pid ( $pid = null )

inherited

Setter for $pid.

Parameters

int

$pid

set_timestarted()

core\task\task_base::set_timestarted ( $timestarted = null )

inherited

Setter for $timestarted.

Parameters

int

$timestarted

Member Data Documentation

__pad0__

replacement core\task\task_base::__pad0__

inherited

Setter for $blocking.

Please note that task blocking is no longer supported. If you are using it in older versions of Moodle you are strongly advised to rewrite your code as has a detrimental impact upon performance.

Deprecated

since Moodle 4.4 See MDL-67667

Todo

Remove in MDL-81509

__pad1__

replacement core\task\task_base::__pad1__

inherited

Getter for $blocking.

Return values

bool

Deprecated

since Moodle 4.4 See MDL-67667

Todo

Remove in MDL-81509

NEVER_RUN_TIME

const core\task\scheduled_task::NEVER_RUN_TIME = 7952342400

inherited

Time used for the next scheduled time when a task should never run.

This is 2222-01-01 00:00 GMT which is a large time that still fits in 10 digits.

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The documentation for this class was generated from the following file:

• lib/classes/task/tag_cron_task.php