def __init__(self, parent, name, **kwargs):
"""
Constructor. May also have properties/attributes passed.
The difference between the assignment of a property using
property_assign versus pre_assign and post_assign is that
changes made using property_assign are task-local, i.e. they are
not visible to other tasks.
Similarly, "defines" are properties that, once defined, can no
longer be modified.
@type parent: Workflow
@param parent: A reference to the parent (usually a workflow).
@type name: string
@param name: A name for the task.
@type kwargs: dict
@param kwargs: The following options are supported:
- lock: a list of locks that is aquired on entry of
execute() and released on leave of execute().
- property_assign: a list of attribute name/value pairs
- pre_assign: a list of attribute name/value pairs
- post_assign: a list of attribute name/value pairs
"""
assert parent is not None
assert name is not None
Trackable.__init__(self)
self._parent = parent
self.id = None
self.name = str(name)
self.description = kwargs.get('description', '')
self.inputs = []
self.outputs = []
self.manual = False
self.internal = False # Only for easing debugging.
self.cancelled = False
self.properties = kwargs.get('properties', {})
self.defines = kwargs.get('defines', {})
self.pre_assign = kwargs.get('pre_assign', [])
self.post_assign = kwargs.get('post_assign', [])
self.locks = kwargs.get('lock', [])
self.lookahead = 2 # Maximum number of MAYBE predictions.
self._parent._add_notify(self)
self.properties.update(self.defines)
assert self.id is not None
def __init__(self, workflow, **kwargs):
"""
Constructor.
"""
Trackable.__init__(self)
assert workflow is not None
self.workflow = workflow
self.attributes = {}
self.outer_job = kwargs.get('parent', self)
self.locks = {}
self.last_node = None
self.task_tree = Task(self, Tasks.Simple(workflow, 'Root'))
self.success = True
self.debug = False
# Prevent the root node from being executed.
self.task_tree.state = Task.COMPLETED
start = self.task_tree._add_child(workflow.start)
workflow.start._predict(start)
if not kwargs.has_key('parent'):
start.spec._update_state(start)
