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doc/api: Add workload APIs
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Marc Bonnici
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@ -5,3 +5,5 @@ Workload Automation API
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:maxdepth: 2
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api/output
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api/workload
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292
doc/source/api/workload.rst
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292
doc/source/api/workload.rst
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.. _workloads-api:
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Workloads
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^^^^^^^^^
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.. _workload-api:
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Workload
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""""""""
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The base :class:`Workload` interface is as follows, and is the base class for
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all :ref:`workload types <workload-types>`. For more information about to
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implement your own workload please see the
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:ref:`Developer How Tos <adding-a-workload>`.
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All instances of a workload will have the following attributes:
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``name``
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This identifies the workload (e.g. it is used to specify the
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workload in the :ref:`agenda <agenda>`).
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``phones_home``
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This can be set to True to mark that this workload poses a risk of
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exposing information to the outside world about the device it runs on.
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For example a benchmark application that sends scores and device data
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to a database owned by the maintainer.
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``requires_network``
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Set this to ``True`` to mark the the workload will fail without a network
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connection, this enables it to fail early with a clear message.
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``asset_directory``
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Set this to specify a custom directory for assets to be pushed to, if
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unset the working directory will be used.
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``asset_files``
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This can be used to automatically deploy additional assets to
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the device. If required the attribute should contain a list of file
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names that are required by the workload which will be attempted to be
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found by the resource getters
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methods
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~~~~~~~
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.. method:: Workload.init_resources(context)
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This method may be optionally overridden to implement dynamic
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resource discovery for the workload. This method executes
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early on, before the device has been initialized, so it
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should only be used to initialize resources that do not
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depend on the device to resolve. This method is executed
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once per run for each workload instance.
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:param context: The :ref:`Context <context>` for the current run.
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.. method:: Workload.validate(context)
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This method can be used to validate any assumptions your workload
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makes about the environment (e.g. that required files are
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present, environment variables are set, etc) and should raise a
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:class:`wa.WorkloadError <wa.framework.exception.WorkloadError>`
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if that is not the case. The base class implementation only makes
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sure sure that the name attribute has been set.
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:param context: The :ref:`Context <context>` for the current run.
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.. method:: Workload.initialize(context)
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This method is decorated with the ``@once_per_instance`` decorator,
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(for more information please see
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:ref:`Execution Decorators <execution-decorators>`)
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therefore it will be executed exactly once per run (no matter
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how many instances of the workload there are). It will run
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after the device has been initialized, so it may be used to
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perform device-dependent initialization that does not need to
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be repeated on each iteration (e.g. as installing executables
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required by the workload on the device).
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:param context: The :ref:`Context <context>` for the current run.
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.. method:: Workload.setup(context)
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Everything that needs to be in place for workload execution should
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be done in this method. This includes copying files to the device,
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starting up an application, configuring communications channels,
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etc.
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:param context: The :ref:`Context <context>` for the current run.
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.. method:: Workload.setup_rerun(context)
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Everything that needs to be in place for workload execution should
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be done in this method. This includes copying files to the device,
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starting up an application, configuring communications channels,
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etc.
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:param context: The :ref:`Context <context>` for the current run.
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.. method:: Workload.run(context)
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This method should perform the actual task that is being measured.
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When this method exits, the task is assumed to be complete.
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:param context: The :ref:`Context <context>` for the current run.
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.. note:: Instruments are kicked off just before calling this
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method and disabled right after, so everything in this
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method is being measured. Therefore this method should
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contain the least code possible to perform the operations
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you are interested in measuring. Specifically, things like
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installing or starting applications, processing results, or
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copying files to/from the device should be done elsewhere if
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possible.
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.. method:: Workload.extract_results(context)
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This method gets invoked after the task execution has finished and
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should be used to extract metrics from the target.
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:param context: The :ref:`Context <context>` for the current run.
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.. method:: Workload.update_output(context)
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This method should be used to update the output within the specified
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execution context with the metrics and artifacts from this
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workload iteration.
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:param context: The :ref:`Context <context>` for the current run.
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.. method:: Workload.teardown(context)
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This could be used to perform any cleanup you may wish to do, e.g.
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Uninstalling applications, deleting file on the device, etc.
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:param context: The :ref:`Context <context>` for the current run.
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.. method:: Workload.finalize(context)
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This is the complement to ``initialize``. This will be executed
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exactly once at the end of the run. This should be used to
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perform any final clean up (e.g. uninstalling binaries installed
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in the ``initialize``)
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:param context: The :ref:`Context <context>` for the current run.
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.. _apkworkload-api:
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ApkWorkload
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""""""""""""
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The :class:`ApkWorkload` derives from the base :class:`Workload` class however
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this associates the workload with a package allowing for an apk to be found for
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the workload, setup and ran on the device before running the workload.
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In addition to the attributes mentioned above ApkWorloads this class also
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features the following attributes however this class does not present any new
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methods.
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``loading_time``
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This is the time in seconds that WA will wait for the application to load
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before continuing with the run. By default this will wait 10 second however
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if your application under test requires additional time this values should
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be increased.
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``package_names``
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This attribute should be a list of Apk packages names that are
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suitable for this workload. Both the host (in the relevant resource
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locations) and device will be searched for an application with a matching
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package name.
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``view``
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This is the "view" associated with the application. This is used by
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instruments like ``fps`` to monitor the current framerate being generated by
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the application.
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``apk``
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The is a :class:`PackageHandler`` which is what is used to store
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information about the apk and manage the application itself, the handler is
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used to call the associated methods to manipulate the application itself for
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example to launch/close it etc.
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``package``
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This is a more convenient way to access the package name of the Apk
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that was found and being used for the run.
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.. _apkuiautoworkload-api:
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ApkUiautoWorkload
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"""""""""""""""""
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The :class:`ApkUiautoWorkload` derives from :class:`ApkUIWorkload` which is an
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intermediate class which in turn inherits from
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:class:`ApkWorkload`, however in addition to associating an apk with the
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workload this class allows for automating the application with UiAutomator.
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This class define these additional attributes:
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``gui``
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This attribute will be an instance of a :class:`UiAutmatorGUI` which is
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used to control the automation, and is what is used to pass parameters to the
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java class for example ``gui.uiauto_params``.
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.. _apkreventworkload-api:
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ApkReventWorkload
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"""""""""""""""""
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The :class:`ApkReventWorkload` derives from :class:`ApkUIWorkload` which is an
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intermediate class which in turn inherits from
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:class:`ApkWorkload`, however in addition to associating an apk with the
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workload this class allows for automating the application with
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:ref:`Revent <revent_files_creation>`.
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This class define these additional attributes:
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``gui``
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This attribute will be an instance of a :class:`ReventGUI` which is
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used to control the automation
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``setup_timeout``
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This is the time allowed for replaying a recording for the setup stage.
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``run_timeout``
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This is the time allowed for replaying a recording for the run stage.
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``extract_results_timeout``
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This is the time allowed for replaying a recording for the extract results stage.
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``teardown_timeout``
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This is the time allowed for replaying a recording for the teardown stage.
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.. _uiautoworkload-api:
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UiautoWorkload
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""""""""""""""
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The :class:`UiautoWorkload` derives from :class:`UIWorkload` which is an
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intermediate class which in turn inherits from
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:class:`Workload`, however this allows for providing generic automation using
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UiAutomator without associating a particular application with the workload.
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This class define these additional attributes:
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``gui``
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This attribute will be an instance of a :class:`UiAutmatorGUI` which is
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used to control the automation, and is what is used to pass parameters to the
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java class for example ``gui.uiauto_params``.
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.. _reventworkload-api:
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ReventWorkload
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""""""""""""""
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The :class:`ReventWorkload` derives from :class:`UIWorkload` which is an
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intermediate class which in turn inherits from
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:class:`Workload`, however this allows for providing generic automation
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using :ref:`Revent <revent_files_creation>` without associating with the
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workload.
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This class define these additional attributes:
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``gui``
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This attribute will be an instance of a :class:`ReventGUI` which is
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used to control the automation
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``setup_timeout``
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This is the time allowed for replaying a recording for the setup stage.
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``run_timeout``
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This is the time allowed for replaying a recording for the run stage.
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``extract_results_timeout``
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This is the time allowed for replaying a recording for the extract results stage.
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``teardown_timeout``
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This is the time allowed for replaying a recording for the teardown stage.
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