Job
abstract class Job extends AbstractQueuedJob (View source)
Class Job
Traits
Provides extensions to this object to integrate it with standard config API methods.
Allows an object to have extensions applied to it.
Allows an object to declare a set of custom methods
Config options
| extensions | array | An array of extension names and parameters to be applied to this object upon construction. |
from Extensible |
| unextendable_classes | array | Classes that cannot be extended |
from Extensible |
| chunk_size | int | Number of URLs processed during one call of AbstractQueuedJob::process() This number should be set to a value which represents number of URLs which is reasonable to process in one go This number will vary depending on project, more specifically it depends on:
|
|
| urls_per_job | int | Number of URLs per job allows you to split work into multiple smaller jobs instead of having one large job This is useful if you're running a queue setup will parallel processing or if you have too many URLs in general If this number is too high you're limiting the parallel processing opportunity If this number is too low you're using your resources inefficiently as every job processing has a fixed overhead which adds up if there are too many jobs |
Properties
| protected | stdClass | $jobData | from AbstractQueuedJob | |
| protected | array | $messages | from AbstractQueuedJob | |
| protected | int | $totalSteps | from AbstractQueuedJob | |
| protected | int | $currentStep | from AbstractQueuedJob | |
| protected | bool | $isComplete | from AbstractQueuedJob | |
| protected static | array | $extra_methods | Custom method sources |
from CustomMethods |
| protected | array | $extra_method_registers | Name of methods to invoke by defineMethods for this instance |
from CustomMethods |
| protected static | array | $built_in_methods | Non-custom methods |
from CustomMethods |
| protected | Extension[] | $extension_instances | from Extensible | |
| protected | callable[][] | $beforeExtendCallbacks | List of callbacks to call prior to extensions having extend called on them, each grouped by methodName. |
from Extensible |
| protected | callable[][] | $afterExtendCallbacks | List of callbacks to call after extensions having extend called on them, each grouped by methodName. |
from Extensible |
| array | $URLsToProcess | |||
| array | $ProcessedURLs |
Methods
Extensions can have a construct but don't have too.
Sets a data object for persisting by adding its id and type to the serialised vars
By default jobs should just go into the default processing queue
Static cache manipulation jobs need to run without a user this is because we don't want any session related data to become part of URLs For example stage GET param is injected into URLs when user is logged in This is problematic as stage param must not be present in statically published URLs as they always refer to live content Including stage param in visiting URL is meant to bypass static cache and redirect to admin login this is something we definitely don't want for statically cached pages
Method for determining whether the job is finished - you may override it if there's more to it than just this
No description
Gets custom config settings to use when running the job.
Sets custom config settings to use when the job is run.
Convenience methods for setting and getting job data
Get a configuration accessor for this class. Short hand for Config::inst()->get($this->class, .....).
Gets the uninherited value for the given config option
Attempts to locate and call a method dynamically added to a class at runtime if a default cannot be located
Adds any methods from Extension instances attached to this object.
Register an callback to invoke that defines extra methods
Return TRUE if a method exists on this object
Get meta-data details on a named method
Return the names of all the methods available on this object
Add all the methods from an object property (which is an Extension) to this object.
Add all the methods from an object property (which is an Extension) to this object.
Add a wrapper method - a method which points to another method with a different name. For example, Thumbnail(x) can be wrapped to generateThumbnail(x)
Add callback as a method.
Allows user code to hook into Object::extend prior to control being delegated to extensions. Each callback will be reset once called.
Allows user code to hook into Object::extend after control being delegated to extensions. Each callback will be reset once called.
Adds any methods from Extension instances attached to this object.
Add an extension to a specific class.
No description
Get extra config sources for this class
Return TRUE if a class has a specified extension.
Calls a method if available on both this object and all applied Extensions, and then attempts to merge all results into an array
Run the given function on all of this object's extensions. Note that this method originally returned void, so if you wanted to return results, you're hosed
Get an extension instance attached to this object by name.
Returns TRUE if this object instance has a specific extension applied in $extension_instances. Extension instances are initialized at constructor time, meaning if you use add_extension() afterwards, the added extension will just be added to new instances of the extended class. Use the static method has_extension() to check if a class (not an instance) has a specific extension.
Get all extension instances for this specific object instance.
Use this method to populate newly created job with data
Move URL to list of processed URLs and update job step to indicate progress indication of progress is important for jobs which take long time to process jobs that do not indicate progress may be identified as stalled by the queue and may end up paused
This function can be overridden to handle the case of failure of specific URL processing such case is not handled by default which results in all such errors being effectively silenced
Details
__construct($params = array())
Extensions can have a construct but don't have too.
Without a construct, it's impossible to create a job in the CMS
abstract string
getTitle()
No description
protected
setObject(DataObject $object, string $name = 'Object')
Sets a data object for persisting by adding its id and type to the serialised vars
protected DataObject|null
getObject(string $name = 'Object')
No description
string
getSignature()
Return a signature for this queued job
protected string
randomSignature()
Generate a somewhat random signature
useful if you're want to make sure something is always added
getJobType()
By default jobs should just go into the default processing queue
int|null
getRunAsMemberID()
Static cache manipulation jobs need to run without a user this is because we don't want any session related data to become part of URLs For example stage GET param is injected into URLs when user is logged in This is problematic as stage param must not be present in statically published URLs as they always refer to live content Including stage param in visiting URL is meant to bypass static cache and redirect to admin login this is something we definitely don't want for statically cached pages
setup()
Performs setup tasks the first time this job is run.
This is only executed once for every job. If you want to run something on every job restart, use the prepareForRestart method.
prepareForRestart()
Run when an already setup job is being restarted.
process()
Do some processing yourself!
jobFinished()
Method for determining whether the job is finished - you may override it if there's more to it than just this
afterComplete()
Called when the job is determined to be 'complete'
getJobData()
No description
setJobData(int $totalSteps, int $currentStep, bool $isComplete, stdClass $jobData, array $messages)
No description
array|null
getCustomConfig()
Gets custom config settings to use when running the job.
setCustomConfig(array $config)
Sets custom config settings to use when the job is run.
addMessage(string $message, string $severity = 'INFO')
No description
__set(mixed $name, mixed $value)
Convenience methods for setting and getting job data
mixed
__get(mixed $name)
Retrieve some job data
static Config_ForClass
config()
Get a configuration accessor for this class. Short hand for Config::inst()->get($this->class, .....).
mixed
stat(string $name)
deprecated
deprecated
Get inherited config value
mixed
uninherited(string $name)
Gets the uninherited value for the given config option
$this
set_stat(string $name, mixed $value)
deprecated
deprecated
Update the config value for a given property
mixed
__call(string $method, array $arguments)
Attempts to locate and call a method dynamically added to a class at runtime if a default cannot be located
You can add extra methods to a class using Extensions}, {@link Object::createMethod() or Object::addWrapperMethod()
protected
defineMethods()
Adds any methods from Extension instances attached to this object.
All these methods can then be called directly on the instance (transparently mapped through __call()}), or called explicitly through {@link extend().
protected
registerExtraMethodCallback(string $name, callable $callback)
Register an callback to invoke that defines extra methods
bool
hasMethod(string $method)
Return TRUE if a method exists on this object
This should be used rather than PHP's inbuild method_exists() as it takes into account methods added via extensions
protected array
getExtraMethodConfig(string $method)
Get meta-data details on a named method
array
allMethodNames(bool $custom = false)
Return the names of all the methods available on this object
protected array
findMethodsFromExtension(object $extension)
deprecated
deprecated
No description
protected
addMethodsFrom(string $property, string|int $index = null)
Add all the methods from an object property (which is an Extension) to this object.
protected
removeMethodsFrom(string $property, string|int $index = null)
Add all the methods from an object property (which is an Extension) to this object.
protected
addWrapperMethod(string $method, string $wrap)
Add a wrapper method - a method which points to another method with a different name. For example, Thumbnail(x) can be wrapped to generateThumbnail(x)
protected
addCallbackMethod(string $method, callable $callback)
Add callback as a method.
protected
beforeExtending(string $method, callable $callback)
Allows user code to hook into Object::extend prior to control being delegated to extensions. Each callback will be reset once called.
protected
afterExtending(string $method, callable $callback)
Allows user code to hook into Object::extend after control being delegated to extensions. Each callback will be reset once called.
protected
constructExtensions()
deprecated
deprecated
No description
protected
defineExtensionMethods()
Adds any methods from Extension instances attached to this object.
All these methods can then be called directly on the instance (transparently mapped through __call()}), or called explicitly through {@link extend().
static bool
add_extension(string $classOrExtension, string $extension = null)
Add an extension to a specific class.
The preferred method for adding extensions is through YAML config, since it avoids autoloading the class, and is easier to override in more specific configurations.
As an alternative, extensions can be added to a specific class directly in the Object::$extensions array. See SiteTree::$extensions for examples. Keep in mind that the extension will only be applied to new instances, not existing ones (including all instances created through singleton()).
static
remove_extension(string $extension)
Remove an extension from a class.
Note: This will not remove extensions from parent classes, and must be called directly on the class assigned the extension.
Keep in mind that this won't revert any datamodel additions of the extension at runtime, unless its used before the schema building kicks in (in your _config.php). Doesn't remove the extension from any Object instances which are already created, but will have an effect on new extensions. Clears any previously created singletons through singleton() to avoid side-effects from stale extension information.
static array
get_extensions(string $class = null, bool $includeArgumentString = false)
No description
static array|null
get_extra_config_sources(string $class = null)
Get extra config sources for this class
static bool
has_extension(string $classOrExtension, string $requiredExtension = null, bool $strict = false)
Return TRUE if a class has a specified extension.
This supports backwards-compatible format (static Object::has_extension($requiredExtension)) and new format ($object->has_extension($class, $requiredExtension))
array
invokeWithExtensions(string $method, mixed $a1 = null, mixed $a2 = null, mixed $a3 = null, mixed $a4 = null, mixed $a5 = null, mixed $a6 = null, mixed $a7 = null)
Calls a method if available on both this object and all applied Extensions, and then attempts to merge all results into an array
array
extend(string $method, mixed $a1 = null, mixed $a2 = null, mixed $a3 = null, mixed $a4 = null, mixed $a5 = null, mixed $a6 = null, mixed $a7 = null)
Run the given function on all of this object's extensions. Note that this method originally returned void, so if you wanted to return results, you're hosed
Currently returns an array, with an index resulting every time the function is called. Only adds returns if they're not NULL, to avoid bogus results from methods just defined on the parent extension. This is important for permission-checks through extend, as they use min() to determine if any of the returns is FALSE. As min() doesn't do type checking, an included NULL return would fail the permission checks.
The extension methods are defined during __construct()} in {@link defineMethods().
Extension|null
getExtensionInstance(string $extension)
Get an extension instance attached to this object by name.
bool
hasExtension(string $extension)
Returns TRUE if this object instance has a specific extension applied in $extension_instances. Extension instances are initialized at constructor time, meaning if you use add_extension() afterwards, the added extension will just be added to new instances of the extended class. Use the static method has_extension() to check if a class (not an instance) has a specific extension.
Caution: Don't use singleton(
Extension[]
getExtensionInstances()
Get all extension instances for this specific object instance.
See get_extensions() to get all applied extension classes for this class (not the instance).
This method also provides lazy-population of the extension_instances property.
void
hydrate(array $urls, string|null $message)
Use this method to populate newly created job with data
int
getUrlsPerJob()
No description
abstract protected void
processUrl(string $url, int $priority)
Implement this method to process URL
protected void
markUrlAsProcessed(string $url)
Move URL to list of processed URLs and update job step to indicate progress indication of progress is important for jobs which take long time to process jobs that do not indicate progress may be identified as stalled by the queue and may end up paused
protected void
updateCompletedState()
Check if job is complete and update the job state if needed
protected int
getChunkSize()
No description
protected
handleFailedUrl(string $url, array $meta)
This function can be overridden to handle the case of failure of specific URL processing such case is not handled by default which results in all such errors being effectively silenced