def __init__(self, **kwargs):
"""
Initializes the Workflow super class, store the instance in the DB and in case
stores the starting parameters.
If initialized with an uuid the Workflow is loaded from the DB, if not a new
workflow is generated and added to the DB following the stack frameworks. This
means that only modules inside aiida.workflows are allowed to implements
the workflow super calls and be stored. The caller names, modules and files are
retrieved from the stack.
:param uuid: a string with the uuid of the object to be loaded.
:param params: a dictionary of storable objects to initialize the specific workflow
:raise: NotExistent: if there is no entry of the desired workflow kind with
the given uuid.
"""
from aiida.backends.djsite.db.models import DbWorkflow
self._to_be_stored = True
self._logger = logger.getChild(self.__class__.__name__)
uuid = kwargs.pop('uuid', None)
if uuid is not None:
self._to_be_stored = False
if kwargs:
raise ValueError("If you pass a UUID, you cannot pass any further parameter")
try:
self._dbworkflowinstance = DbWorkflow.objects.get(uuid=uuid)
# self.logger.info("Workflow found in the database, now retrieved")
self._repo_folder = RepositoryFolder(section=self._section_name, uuid=self.uuid)
except ObjectDoesNotExist:
raise NotExistent("No entry with the UUID {} found".format(uuid))
else:
# ATTENTION: Do not move this code outside or encapsulate it in a function
import inspect
stack = inspect.stack()
# cur_fr = inspect.currentframe()
#call_fr = inspect.getouterframes(cur_fr, 2)
# Get all the caller data
caller_frame = stack[1][0]
caller_file = stack[1][1]
caller_funct = stack[1][3]
caller_module = inspect.getmodule(caller_frame)
caller_module_class = caller_frame.f_locals.get('self', None).__class__
if not caller_funct == "__init__":
raise SystemError("A workflow must implement the __init__ class explicitly")
# Test if the launcher is another workflow
# print "caller_module", caller_module
# print "caller_module_class", caller_module_class
# print "caller_file", caller_file
# print "caller_funct", caller_funct
# Accept only the aiida.workflows packages
if caller_module == None or not caller_module.__name__.startswith("aiida.workflows"):
raise SystemError("The superclass can't be called directly")
self.caller_module = caller_module.__name__
self.caller_module_class = caller_module_class.__name__
self.caller_file = caller_file
self.caller_funct = caller_funct
self._temp_folder = SandboxFolder()
self.current_folder.insert_path(self.caller_file, self.caller_module_class)
# self.store()
# Test if there are parameters as input
params = kwargs.pop('params', None)
if params is not None:
if type(params) is dict:
self.set_params(params)
# This stores the MD5 as well, to test in case the workflow has
# been modified after the launch
self._dbworkflowinstance = DbWorkflow(user=get_automatic_user(),
module=self.caller_module,
module_class=self.caller_module_class,
script_path=self.caller_file,
script_md5=md5_file(self.caller_file))
self.attach_calc_lazy_storage = {}
self.attach_subwf_lazy_storage = {}
class Workflow(AbstractWorkflow):
def __init__(self, **kwargs):
"""
Initializes the Workflow super class, store the instance in the DB and in case
stores the starting parameters.
If initialized with an uuid the Workflow is loaded from the DB, if not a new
workflow is generated and added to the DB following the stack frameworks. This
means that only modules inside aiida.workflows are allowed to implements
the workflow super calls and be stored. The caller names, modules and files are
retrieved from the stack.
:param uuid: a string with the uuid of the object to be loaded.
:param params: a dictionary of storable objects to initialize the specific workflow
:raise: NotExistent: if there is no entry of the desired workflow kind with
the given uuid.
"""
from aiida.backends.djsite.db.models import DbWorkflow
self._to_be_stored = True
self._logger = logger.getChild(self.__class__.__name__)
uuid = kwargs.pop('uuid', None)
if uuid is not None:
self._to_be_stored = False
if kwargs:
raise ValueError("If you pass a UUID, you cannot pass any further parameter")
try:
self._dbworkflowinstance = DbWorkflow.objects.get(uuid=uuid)
# self.logger.info("Workflow found in the database, now retrieved")
self._repo_folder = RepositoryFolder(section=self._section_name, uuid=self.uuid)
except ObjectDoesNotExist:
raise NotExistent("No entry with the UUID {} found".format(uuid))
else:
# ATTENTION: Do not move this code outside or encapsulate it in a function
import inspect
stack = inspect.stack()
# cur_fr = inspect.currentframe()
#call_fr = inspect.getouterframes(cur_fr, 2)
# Get all the caller data
caller_frame = stack[1][0]
caller_file = stack[1][1]
caller_funct = stack[1][3]
caller_module = inspect.getmodule(caller_frame)
caller_module_class = caller_frame.f_locals.get('self', None).__class__
if not caller_funct == "__init__":
raise SystemError("A workflow must implement the __init__ class explicitly")
# Test if the launcher is another workflow
# print "caller_module", caller_module
# print "caller_module_class", caller_module_class
# print "caller_file", caller_file
# print "caller_funct", caller_funct
# Accept only the aiida.workflows packages
if caller_module == None or not caller_module.__name__.startswith("aiida.workflows"):
raise SystemError("The superclass can't be called directly")
self.caller_module = caller_module.__name__
self.caller_module_class = caller_module_class.__name__
self.caller_file = caller_file
self.caller_funct = caller_funct
self._temp_folder = SandboxFolder()
self.current_folder.insert_path(self.caller_file, self.caller_module_class)
# self.store()
# Test if there are parameters as input
params = kwargs.pop('params', None)
if params is not None:
if type(params) is dict:
self.set_params(params)
# This stores the MD5 as well, to test in case the workflow has
# been modified after the launch
self._dbworkflowinstance = DbWorkflow(user=get_automatic_user(),
module=self.caller_module,
module_class=self.caller_module_class,
script_path=self.caller_file,
script_md5=md5_file(self.caller_file))
self.attach_calc_lazy_storage = {}
self.attach_subwf_lazy_storage = {}
@property
def dbworkflowinstance(self):
"""
Get the DbWorkflow object stored in the super class.
:return: DbWorkflow object from the database
"""
from aiida.backends.djsite.db.models import DbWorkflow
if self._dbworkflowinstance.pk is None:
return self._dbworkflowinstance
else:
self._dbworkflowinstance = DbWorkflow.objects.get(pk=self._dbworkflowinstance.pk)
return self._dbworkflowinstance
def _get_dbworkflowinstance(self):
return self.dbworkflowinstance
@property
def label(self):
"""
Get the label of the workflow.
:return: a string
"""
return self.dbworkflowinstance.label
@label.setter
def label(self, label):
self._update_db_label_field(label)
def _update_db_label_field(self, field_value):
"""
Safety method to store the label of the workflow
:return: a string
"""
from django.db import transaction
self.dbworkflowinstance.label = field_value
if not self._to_be_stored:
with transaction.commit_on_success():
self._dbworkflowinstance.save()
self._increment_version_number_db()
@property
def description(self):
"""
Get the description of the workflow.
:return: a string
"""
return self.dbworkflowinstance.description
@description.setter
def description(self, desc):
self._update_db_description_field(desc)
def _update_db_description_field(self, field_value):
"""
Safety method to store the description of the workflow
:return: a string
"""
from django.db import transaction
self.dbworkflowinstance.description = field_value
if not self._to_be_stored:
with transaction.commit_on_success():
self._dbworkflowinstance.save()
self._increment_version_number_db()
def _increment_version_number_db(self):
"""
This function increments the version number in the DB.
This should be called every time you need to increment the version (e.g. on adding a
extra or attribute).
"""
from django.db.models import F
from aiida.backends.djsite.db.models import DbWorkflow
# I increment the node number using a filter (this should be the right way of doing it;
# dbnode.nodeversion = F('nodeversion') + 1
# will do weird stuff, returning Django Objects instead of numbers, and incrementing at
# every save; moreover in this way I should do the right thing for concurrent writings
# I use self._dbnode because this will not do a query to update the node; here I only
# need to get its pk
DbWorkflow.objects.filter(pk=self.pk).update(nodeversion=F('nodeversion') + 1)
# This reload internally the node of self._dbworkflowinstance
_ = self.dbworkflowinstance
# Note: I have to reload the ojbect. I don't do it here because it is done at every call
# to self.dbnode
# self._dbnode = DbNode.objects.get(pk=self._dbnode.pk)
@classmethod
def query(cls, *args, **kwargs):
"""
Map to the aiidaobjects manager of the DbWorkflow, that returns
Workflow objects instead of DbWorkflow entities.
"""
from aiida.backends.djsite.db.models import DbWorkflow
return DbWorkflow.aiidaobjects.filter(*args, **kwargs)
# @property
#def logger(self):
# """
# Get the logger of the Workflow object.
#
# :return: Logger object
# """
# return self._logger
@property
def logger(self):
"""
Get the logger of the Workflow object, so that it also logs to the
DB.
:return: LoggerAdapter object, that works like a logger, but also has
the 'extra' embedded
"""
import logging
from aiida.utils.logger import get_dblogger_extra
return logging.LoggerAdapter(logger=self._logger,
extra=get_dblogger_extra(self))
def store(self):
"""
Stores the DbWorkflow object data in the database
"""
if self._to_be_stored:
self._dbworkflowinstance.save()
if hasattr(self, '_params'):
self.dbworkflowinstance.add_parameters(self._params, force=False)
self._repo_folder = RepositoryFolder(section=self._section_name, uuid=self.uuid)
self.repo_folder.replace_with_folder(self.get_temp_folder().abspath, move=True, overwrite=True)
self._temp_folder = None
self._to_be_stored = False
# Important to allow to do w = WorkflowSubClass().store()
return self
@property
def uuid(self):
"""
Returns the DbWorkflow uuid
"""
return self.dbworkflowinstance.uuid
@property
def pk(self):
"""
Returns the DbWorkflow pk
"""
return self.dbworkflowinstance.pk
def info(self):
"""
Returns an array with all the informations about the modules, file, class to locate
the workflow source code
"""
return [self.dbworkflowinstance.module,
self.dbworkflowinstance.module_class,
self.dbworkflowinstance.script_path,
self.dbworkflowinstance.script_md5,
self.dbworkflowinstance.ctime,
self.dbworkflowinstance.state]
def set_params(self, params, force=False):
"""
Adds parameters to the Workflow that are both stored and used every time
the workflow engine re-initialize the specific workflow to launch the new methods.
"""
def par_validate(params):
the_params = {}
for k, v in params.iteritems():
if any([isinstance(v, int),
isinstance(v, bool),
isinstance(v, float),
isinstance(v, str)]):
the_params[k] = v
else:
raise ValidationError("Cannot store in the DB a parameter "
"which is not of type int, bool, float or str.")
return the_params
if self._to_be_stored:
self._params = params
else:
the_params = par_validate(params)
self.dbworkflowinstance.add_parameters(the_params, force=force)
def get_parameters(self):
"""
Get the Workflow paramenters
:return: a dictionary of storable objects
"""
if self._to_be_stored:
return self._params
else:
return self.dbworkflowinstance.get_parameters()
def get_parameter(self, _name):
"""
Get one Workflow paramenter
:param name: a string with the parameters name to retrieve
:return: a dictionary of storable objects
"""
if self._to_be_stored:
return self._params(_name)
else:
return self.dbworkflowinstance.get_parameter(_name)
def get_attributes(self):
"""
Get the Workflow attributes
:return: a dictionary of storable objects
"""
return self.dbworkflowinstance.get_attributes()
def get_attribute(self, _name):
"""
Get one Workflow attribute
:param name: a string with the attribute name to retrieve
:return: a dictionary of storable objects
"""
return self.dbworkflowinstance.get_attribute(_name)
def add_attributes(self, _params):
"""
Add a set of attributes to the Workflow. If another attribute is present with the same name it will
be overwritten.
:param name: a string with the attribute name to store
:param value: a storable object to store
"""
if self._to_be_stored:
raise ModificationNotAllowed("You cannot add attributes before storing")
self.dbworkflowinstance.add_attributes(_params)
def add_attribute(self, _name, _value):
"""
Add one attributes to the Workflow. If another attribute is present with the same name it will
be overwritten.
:param name: a string with the attribute name to store
:param value: a storable object to store
"""
if self._to_be_stored:
raise ModificationNotAllowed("You cannot add attributes before storing")
self.dbworkflowinstance.add_attribute(_name, _value)
def get_results(self):
"""
Get the Workflow results
:return: a dictionary of storable objects
"""
return self.dbworkflowinstance.get_results()
def get_result(self, _name):
"""
Get one Workflow result
:param name: a string with the result name to retrieve
:return: a dictionary of storable objects
"""
return self.dbworkflowinstance.get_result(_name)
def add_results(self, _params):
"""
Add a set of results to the Workflow. If another result is present with the same name it will
be overwritten.
:param name: a string with the result name to store
:param value: a storable object to store
"""
self.dbworkflowinstance.add_results(_params)
def add_result(self, _name, _value):
"""
Add one result to the Workflow. If another result is present with the same name it will
be overwritten.
:param name: a string with the result name to store
:param value: a storable object to store
"""
self.dbworkflowinstance.add_result(_name, _value)
def get_state(self):
"""
Get the Workflow's state
:return: a state from wf_states in aiida.common.datastructures
"""
return self.dbworkflowinstance.state
def set_state(self, state):
"""
Set the Workflow's state
:param name: a state from wf_states in aiida.common.datastructures
"""
self.dbworkflowinstance.set_state(state)
def is_new(self):
"""
Returns True is the Workflow's state is CREATED
"""
return self.dbworkflowinstance.state == wf_states.CREATED
def is_running(self):
"""
Returns True is the Workflow's state is RUNNING
"""
return self.dbworkflowinstance.state == wf_states.RUNNING
def has_finished_ok(self):
"""
Returns True is the Workflow's state is FINISHED
"""
return self.dbworkflowinstance.state in [wf_states.FINISHED, wf_states.SLEEP]
def has_failed(self):
"""
Returns True is the Workflow's state is ERROR
"""
return self.dbworkflowinstance.state == wf_states.ERROR
def is_subworkflow(self):
"""
Return True is this is a subworkflow (i.e., if it has a parent),
False otherwise.
"""
return self.dbworkflowinstance.is_subworkflow()
def get_step(self, step_method):
"""
Retrieves by name a step from the Workflow.
:param step_method: a string with the name of the step to retrieve or a method
:raise: ObjectDoesNotExist: if there is no step with the specific name.
:return: a DbWorkflowStep object.
"""
if isinstance(step_method, basestring):
step_method_name = step_method
else:
if not getattr(step_method, "is_wf_step"):
raise AiidaException("Cannot get step calculations from a method not decorated as Workflow method")
step_method_name = step_method.wf_step_name
if (step_method_name == wf_exit_call):
raise InternalError("Cannot query a step with name {0}, reserved string".format(step_method_name))
try:
step = self.dbworkflowinstance.steps.get(name=step_method_name, user=get_automatic_user())
return step
except ObjectDoesNotExist:
return None
def get_steps(self, state=None):
"""
Retrieves all the steps from a specific workflow Workflow with the possibility to limit the list
to a specific step's state.
:param state: a state from wf_states in aiida.common.datastructures
:return: a list of DbWorkflowStep objects.
"""
if state is None:
return self.dbworkflowinstance.steps.all().order_by('time') #.values_list('name',flat=True)
else:
return self.dbworkflowinstance.steps.filter(state=state).order_by('time')
def get_report(self):
"""
Return the Workflow report.
:note: once, in case the workflow is a subworkflow of any other Workflow this method
calls the parent ``get_report`` method.
This is not the case anymore.
:return: a list of strings
"""
return self.dbworkflowinstance.report.splitlines()
def clear_report(self):
"""
Wipe the Workflow report. In case the workflow is a subworflow of any other Workflow this method
calls the parent ``clear_report`` method.
"""
if len(self.dbworkflowinstance.parent_workflow_step.all()) == 0:
self.dbworkflowinstance.clear_report()
else:
Workflow(uuid=self.dbworkflowinstance.parent_workflow_step.get().parent.uuid).clear_report()
def append_to_report(self, text):
"""
Adds text to the Workflow report.
:note: Once, in case the workflow is a subworkflow of any other Workflow this method
calls the parent ``append_to_report`` method; now instead this is not the
case anymore
"""
self.dbworkflowinstance.append_to_report(text)
@classmethod
def get_subclass_from_dbnode(cls, wf_db):
module = wf_db.module
module_class = wf_db.module_class
try:
wf_mod = importlib.import_module(module)
except ImportError:
raise InternalError("Unable to load the workflow module {}".format(module))
for elem_name, elem in wf_mod.__dict__.iteritems():
if module_class == elem_name: #and issubclass(elem, Workflow):
return getattr(wf_mod, elem_name)(uuid=wf_db.uuid)
@classmethod
def get_subclass_from_pk(cls, pk):
from aiida.backends.djsite.db.models import DbWorkflow
try:
dbworkflowinstance = DbWorkflow.objects.get(pk=pk)
return cls.get_subclass_from_dbnode(dbworkflowinstance)
except ObjectDoesNotExist:
raise NotExistent("No entry with pk= {} found".format(pk))
@classmethod
def get_subclass_from_uuid(cls, uuid):
from aiida.backends.djsite.db.models import DbWorkflow
try:
dbworkflowinstance = DbWorkflow.objects.get(uuid=uuid)
return cls.get_subclass_from_dbnode(dbworkflowinstance)
except ObjectDoesNotExist:
raise NotExistent("No entry with the UUID {} found".format(uuid))