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def setup(self,pin,mode):
"""Set the input or output mode for a specified pin. Mode should be
either DIR_IN or DIR_OUT.
"""
self.mraa_gpio.Gpio.dir(self.mraa_gpio.Gpio(pin),self._dir_mapping[mode]) |
def output(self,pin,value):
"""Set the specified pin the provided high/low value. Value should be
either 1 (ON or HIGH), or 0 (OFF or LOW) or a boolean.
"""
self.mraa_gpio.Gpio.write(self.mraa_gpio.Gpio(pin), value) |
def input(self,pin):
"""Read the specified pin and return HIGH/true if the pin is pulled high,
or LOW/false if pulled low.
"""
return self.mraa_gpio.Gpio.read(self.mraa_gpio.Gpio(pin)) |
def add_event_detect(self, pin, edge, callback=None, bouncetime=-1):
"""Enable edge detection events for a particular GPIO channel. Pin
should be type IN. Edge must be RISING, FALLING or BOTH. Callback is a
function for the event. Bouncetime is switch bounce timeout in ms for
callb... |
def remove_event_detect(self, pin):
"""Remove edge detection for a particular GPIO channel. Pin should be
type IN.
"""
self.mraa_gpio.Gpio.isrExit(self.mraa_gpio.Gpio(pin)) |
def wait_for_edge(self, pin, edge):
"""Wait for an edge. Pin should be type IN. Edge must be RISING,
FALLING or BOTH.
"""
self.bbio_gpio.wait_for_edge(self.mraa_gpio.Gpio(pin), self._edge_mapping[edge]) |
def all_info_files(self) :
'Returns a generator of "Path"s'
try :
for info_file in list_files_in_dir(self.info_dir):
if not os.path.basename(info_file).endswith('.trashinfo') :
self.on_non_trashinfo_found()
else :
yield ... |
def describe(path):
"""
Return a textual description of the file pointed by this path.
Options:
- "symbolic link"
- "directory"
- "'.' directory"
- "'..' directory"
- "regular file"
- "regular empty file"
- "non existent"
- "entry"
"""
if os.path.islink(path):... |
def trash(self, file) :
"""
Trash a file in the appropriate trash directory.
If the file belong to the same volume of the trash home directory it
will be trashed in the home trash directory.
Otherwise it will be trashed in one of the relevant volume trash
directories.
... |
def persist_trash_info(self, basename, content, logger):
"""
Create a .trashinfo file in the $trash/info directory.
returns the created TrashInfoFile.
"""
self.ensure_dir(self.info_dir, 0o700)
# write trash info
index = 0
while True :
if inde... |
def get_process_parser(self, process_id_or_name):
"""
Returns the ProcessParser for the given process ID or name. It matches
by name first.
"""
if process_id_or_name in self.process_parsers_by_name:
return self.process_parsers_by_name[process_id_or_name]
else:... |
def add_bpmn_files(self, filenames):
"""
Add all filenames in the given list to the parser's set.
"""
for filename in filenames:
f = open(filename, 'r')
try:
self.add_bpmn_xml(ET.parse(f), filename=filename)
finally:
f.c... |
def add_bpmn_xml(self, bpmn, svg=None, filename=None):
"""
Add the given lxml representation of the BPMN file to the parser's set.
:param svg: Optionally, provide the text data for the SVG of the BPMN
file
:param filename: Optionally, provide the source filename.
"""
... |
def one(nodes, or_none=False):
"""
Assert that there is exactly one node in the give list, and return it.
"""
if not nodes and or_none:
return None
assert len(
nodes) == 1, 'Expected 1 result. Received %d results.' % (len(nodes))
return nodes[0] |
def xpath_eval(node, extra_ns=None):
"""
Returns an XPathEvaluator, with namespace prefixes 'bpmn' for
http://www.omg.org/spec/BPMN/20100524/MODEL, and additional specified ones
"""
namespaces = {'bpmn': BPMN_MODEL_NS}
if extra_ns:
namespaces.update(extra_ns)
return lambda path: node... |
def serialize_attrib(self, op):
"""
Serializer for :meth:`SpiffWorkflow.operators.Attrib`.
Example::
<attribute>foobar</attribute>
"""
elem = etree.Element('attribute')
elem.text = op.name
return elem |
def serialize_pathattrib(self, op):
"""
Serializer for :meth:`SpiffWorkflow.operators.PathAttrib`.
Example::
<path>foobar</path>
"""
elem = etree.Element('path')
elem.text = op.path
return elem |
def serialize_assign(self, op):
"""
Serializer for :meth:`SpiffWorkflow.operators.Assign`.
Example::
<assign>
<name>foobar</name>
<value>doodle</value>
</assign>
"""
elem = etree.Element('assign')
self.serialize_va... |
def serialize_value(self, parent_elem, value):
"""
Serializes str, Attrib, or PathAttrib objects.
Example::
<attribute>foobar</attribute>
"""
if isinstance(value, (str, int)) or type(value).__name__ == 'str':
parent_elem.text = str(value)
elif va... |
def serialize_value_map(self, map_elem, thedict):
"""
Serializes a dictionary of key/value pairs, where the values are
either strings, or Attrib, or PathAttrib objects.
Example::
<variable>
<name>foo</name>
<value>text</value>
</v... |
def serialize_value_list(self, list_elem, thelist):
"""
Serializes a list, where the values are objects of type
str, Attrib, or PathAttrib.
Example::
<value>text</value>
<value><attribute>foobar</attribute></value>
<value><path>foobar</path></value>
... |
def serialize_operator_equal(self, op):
"""
Serializer for :meth:`SpiffWorkflow.operators.Equal`.
Example::
<equals>
<value>text</value>
<value><attribute>foobar</attribute></value>
<value><path>foobar</path></value>
</equ... |
def serialize_operator_not_equal(self, op):
"""
Serializer for :meth:`SpiffWorkflow.operators.NotEqual`.
Example::
<not-equals>
<value>text</value>
<value><attribute>foobar</attribute></value>
<value><path>foobar</path></value>
... |
def serialize_operator_greater_than(self, op):
"""
Serializer for :meth:`SpiffWorkflow.operators.NotEqual`.
Example::
<greater-than>
<value>text</value>
<value><attribute>foobar</attribute></value>
</greater-than>
"""
elem... |
def serialize_operator_less_than(self, op):
"""
Serializer for :meth:`SpiffWorkflow.operators.NotEqual`.
Example::
<less-than>
<value>text</value>
<value><attribute>foobar</attribute></value>
</less-than>
"""
elem = etree.... |
def serialize_operator_match(self, op):
"""
Serializer for :meth:`SpiffWorkflow.operators.NotEqual`.
Example::
<matches>
<value>text</value>
<value><attribute>foobar</attribute></value>
</matches>
"""
elem = etree.Element(... |
def serialize_task_spec(self, spec, elem):
"""
Serializes common attributes of :meth:`SpiffWorkflow.specs.TaskSpec`.
"""
if spec.id is not None:
SubElement(elem, 'id').text = str(spec.id)
SubElement(elem, 'name').text = spec.name
if spec.description:
... |
def serialize_acquire_mutex(self, spec):
"""
Serializer for :meth:`SpiffWorkflow.specs.AcquireMutex`.
"""
elem = etree.Element('acquire-mutex')
self.serialize_task_spec(spec, elem)
SubElement(elem, 'mutex').text = spec.mutex
return elem |
def get_event_definition(self):
"""
Parse the event definition node, and return an instance of Event
"""
messageEventDefinition = first(
self.xpath('.//bpmn:messageEventDefinition'))
if messageEventDefinition is not None:
return self.get_message_event_defi... |
def get_message_event_definition(self, messageEventDefinition):
"""
Parse the messageEventDefinition node and return an instance of
MessageEventDefinition
"""
messageRef = first(self.xpath('.//bpmn:messageRef'))
message = messageRef.get(
'name') if messageRef ... |
def get_timer_event_definition(self, timerEventDefinition):
"""
Parse the timerEventDefinition node and return an instance of
TimerEventDefinition
This currently only supports the timeDate node for specifying an expiry
time for the timer.
"""
timeDate = first(sel... |
def get_all_lanes(self):
"""
Returns a set of the distinct lane names used in the process (including
called activities)
"""
done = set()
lanes = set()
def recursive_find(task_spec):
if task_spec in done:
return
done.add(t... |
def get_specs_depth_first(self):
"""
Get the specs for all processes (including called ones), in depth first
order.
"""
done = set()
specs = [self]
def recursive_find(task_spec):
if task_spec in done:
return
done.add(task... |
def to_html_string(self):
"""
Returns an etree HTML node with a document describing the process. This
is only supported if the editor provided an SVG representation.
"""
html = ET.Element('html')
head = ET.SubElement(html, 'head')
title = ET.SubElement(head, 'titl... |
def connect(self, callback, *args, **kwargs):
"""
Connects the event with the given callback.
When the signal is emitted, the callback is invoked.
.. note::
The signal handler is stored with a hard reference, so you
need to make sure to call :class:`disconnect()... |
def listen(self, callback, *args, **kwargs):
"""
Like :class:`connect()`, but uses a weak reference instead of a
normal reference.
The signal is automatically disconnected as soon as the handler
is garbage collected.
.. note::
Storing signal handlers as weak... |
def n_subscribers(self):
"""
Returns the number of connected subscribers.
:rtype: int
:returns: The number of subscribers.
"""
hard = self.hard_subscribers and len(self.hard_subscribers) or 0
weak = self.weak_subscribers and len(self.weak_subscribers) or 0
... |
def is_connected(self, callback):
"""
Returns True if the event is connected to the given function.
:type callback: object
:param callback: The callback function.
:rtype: bool
:returns: Whether the signal is connected to the given function.
"""
index = ... |
def emit(self, *args, **kwargs):
"""
Emits the signal, passing the given arguments to the callbacks.
If one of the callbacks returns a value other than None, no further
callbacks are invoked and the return value of the callback is
returned to the caller of emit().
:type ... |
def _try_disconnect(self, ref):
"""
Called by the weak reference when its target dies.
In other words, we can assert that self.weak_subscribers is not
None at this time.
"""
with self.lock:
weak = [s[0] for s in self.weak_subscribers]
try:
... |
def disconnect(self, callback):
"""
Disconnects the signal from the given function.
:type callback: object
:param callback: The callback function.
"""
if self.weak_subscribers is not None:
with self.lock:
index = self._weakly_connected_index(... |
def deserialize_workflow_spec(self, s_state, filename=None):
"""
:param s_state: a byte-string with the contents of the packaged
workflow archive, or a file-like object.
:param filename: the name of the package file.
"""
if isinstance(s_state, (str, bytes)):
... |
def parse_node(self):
"""
Parse this node, and all children, returning the connected task spec.
"""
try:
self.task = self.create_task()
self.task.documentation = self.parser._parse_documentation(
self.node, xpath=self.xpath, task_parser=self)
... |
def create_task(self):
"""
Create an instance of the task appropriately. A subclass can override
this method to get extra information from the node.
"""
return self.spec_class(self.spec, self.get_task_spec_name(),
lane=self.get_lane(),
... |
def connect_outgoing(self, outgoing_task, outgoing_task_node,
sequence_flow_node, is_default):
"""
Connects this task to the indicating outgoing task, with the details in
the sequence flow. A subclass can override this method to get extra
information from the nod... |
def connect_outgoing(self, taskspec, sequence_flow_id, sequence_flow_name,
documentation):
"""
Connect this task spec to the indicated child.
:param sequence_flow_id: The ID of the connecting sequenceFlow node.
:param sequence_flow_name: The name of the connect... |
def connect_outgoing_if(self, condition, taskspec, sequence_flow_id,
sequence_flow_name, documentation):
"""
Connect this task spec to the indicated child, if the condition
evaluates to true. This should only be called if the task has a
connect_if method (e.g.... |
def get_outgoing_sequence_names(self):
"""
Returns a list of the names of outgoing sequences. Some may be None.
"""
return sorted([s.name for s in
list(self.outgoing_sequence_flows_by_id.values())]) |
def connect_if(self, condition, task_spec):
"""
Connects a taskspec that is executed if the condition DOES match.
condition -- a condition (Condition)
taskspec -- the conditional task spec
"""
assert task_spec is not None
self.outputs.append(task_spec)
se... |
def _on_complete_hook(self, my_task):
"""
Runs the task. Should not be called directly.
Returns True if completed, False otherwise.
"""
# Find all matching conditions.
outputs = []
for condition, output in self.cond_task_specs:
if self.choice is not No... |
def is_completed(self):
"""
Returns True if the entire Workflow is completed, False otherwise.
:rtype: bool
:return: Whether the workflow is completed.
"""
mask = Task.NOT_FINISHED_MASK
iter = Task.Iterator(self.task_tree, mask)
try:
next(iter... |
def cancel(self, success=False):
"""
Cancels all open tasks in the workflow.
:type success: bool
:param success: Whether the Workflow should be marked as successfully
completed.
"""
self.success = success
cancel = []
mask = Task.N... |
def get_task(self, id):
"""
Returns the task with the given id.
:type id:integer
:param id: The id of a task.
:rtype: Task
:returns: The task with the given id.
"""
tasks = [task for task in self.get_tasks() if task.id == id]
return tasks[0] if le... |
def get_tasks_from_spec_name(self, name):
"""
Returns all tasks whose spec has the given name.
:type name: str
:param name: The name of a task spec.
:rtype: Task
:return: The task that relates to the spec with the given name.
"""
return [task for task in ... |
def get_tasks(self, state=Task.ANY_MASK):
"""
Returns a list of Task objects with the given state.
:type state: integer
:param state: A bitmask of states.
:rtype: list[Task]
:returns: A list of tasks.
"""
return [t for t in Task.Iterator(self.task_tree,... |
def complete_task_from_id(self, task_id):
"""
Runs the task with the given id.
:type task_id: integer
:param task_id: The id of the Task object.
"""
if task_id is None:
raise WorkflowException(self.spec, 'task_id is None')
for task in self.task_tree:... |
def complete_next(self, pick_up=True, halt_on_manual=True):
"""
Runs the next task.
Returns True if completed, False otherwise.
:type pick_up: bool
:param pick_up: When True, this method attempts to choose the next
task not by searching beginning at the ... |
def complete_all(self, pick_up=True, halt_on_manual=True):
"""
Runs all branches until completion. This is a convenience wrapper
around :meth:`complete_next`, and the pick_up argument is passed
along.
:type pick_up: bool
:param pick_up: Passed on to each call of complet... |
def ref(function, callback=None):
"""
Returns a weak reference to the given method or function.
If the callback argument is not None, it is called as soon
as the referenced function is garbage deleted.
:type function: callable
:param function: The function to reference.
:type callback: ca... |
def serialize_workflow(self, workflow, include_spec=False, **kwargs):
"""
:param workflow: the workflow instance to serialize
:param include_spec: Always set to False (The CompactWorkflowSerializer
only supports workflow serialization)
"""
if include_spec:
ra... |
def deserialize_workflow(self, s_state, workflow_spec=None,
read_only=False, **kwargs):
"""
:param s_state: the state of the workflow as returned by
serialize_workflow
:param workflow_spec: the Workflow Spec of the workflow
(CompactWorkflowSerializer... |
def new_workflow(self, workflow_spec, read_only=False, **kwargs):
"""
Create a new workflow instance from the given spec and arguments.
:param workflow_spec: the workflow spec to use
:param read_only: this should be in read only mode
:param kwargs: Any extra kwargs passed to t... |
def _start(self, my_task, force=False):
"""Returns False when successfully fired, True otherwise"""
if (not hasattr(my_task, 'subprocess')) or my_task.subprocess is None:
my_task.subprocess = subprocess.Popen(self.args,
stderr=subprocess.STDO... |
def _setstate(self, value, force=False):
"""
Setting force to True allows for changing a state after it
COMPLETED. This would otherwise be invalid.
"""
if self._state == value:
return
if value < self._state and not force:
raise WorkflowException(se... |
def _set_state(self, state, force=True):
"""
Setting force to True allows for changing a state after it
COMPLETED. This would otherwise be invalid.
"""
self._setstate(state, True)
self.last_state_change = time.time() |
def _add_child(self, task_spec, state=MAYBE):
"""
Adds a new child and assigns the given TaskSpec to it.
:type task_spec: TaskSpec
:param task_spec: The task spec that is assigned to the new child.
:type state: integer
:param state: The bitmask of states for the new ch... |
def _assign_new_thread_id(self, recursive=True):
"""
Assigns a new thread id to the task.
:type recursive: bool
:param recursive: Whether to assign the id to children recursively.
:rtype: bool
:returns: The new thread id.
"""
self.__class__.thread_id_po... |
def _sync_children(self, task_specs, state=MAYBE):
"""
This method syncs up the task's children with the given list of task
specs. In other words::
- Add one child for each given TaskSpec, unless that child already
exists.
- Remove all children for which th... |
def _is_descendant_of(self, parent):
"""
Returns True if parent is in the list of ancestors, returns False
otherwise.
:type parent: Task
:param parent: The parent that is searched in the ancestors.
:rtype: bool
:returns: Whether the parent was found.
""... |
def _find_child_of(self, parent_task_spec):
"""
Returns the ancestor that has a task with the given task spec
as a parent.
If no such ancestor was found, the root task is returned.
:type parent_task_spec: TaskSpec
:param parent_task_spec: The wanted ancestor.
:r... |
def _find_any(self, task_spec):
"""
Returns any descendants that have the given task spec assigned.
:type task_spec: TaskSpec
:param task_spec: The wanted task spec.
:rtype: list(Task)
:returns: The tasks objects that are attached to the given task spec.
"""
... |
def _find_ancestor(self, task_spec):
"""
Returns the ancestor that has the given task spec assigned.
If no such ancestor was found, the root task is returned.
:type task_spec: TaskSpec
:param task_spec: The wanted task spec.
:rtype: Task
:returns: The ancestor.... |
def _find_ancestor_from_name(self, name):
"""
Returns the ancestor that has a task with the given name assigned.
Returns None if no such ancestor was found.
:type name: str
:param name: The name of the wanted task.
:rtype: Task
:returns: The ancestor.
"... |
def _ready(self):
"""
Marks the task as ready for execution.
"""
if self._has_state(self.COMPLETED) or self._has_state(self.CANCELLED):
return
self._set_state(self.READY)
self.task_spec._on_ready(self) |
def get_state_name(self):
"""
Returns a textual representation of this Task's state.
"""
state_name = []
for state, name in list(self.state_names.items()):
if self._has_state(state):
state_name.append(name)
return '|'.join(state_name) |
def _inherit_data(self):
"""
Inherits the data from the parent.
"""
LOG.debug("'%s' inheriting data from '%s'" % (self.get_name(),
self.parent.get_name()),
extra=dict(data=self.parent.data))
self.set_data(**s... |
def cancel(self):
"""
Cancels the item if it was not yet completed, and removes
any children that are LIKELY.
"""
if self._is_finished():
for child in self.children:
child.cancel()
return
self._set_state(self.CANCELLED)
self... |
def complete(self):
"""
Called by the associated task to let us know that its state
has changed (e.g. from FUTURE to COMPLETED.)
"""
self._set_state(self.COMPLETED)
return self.task_spec._on_complete(self) |
def get_dump(self, indent=0, recursive=True):
"""
Returns the subtree as a string for debugging.
:rtype: str
:returns: The debug information.
"""
dbg = (' ' * indent * 2)
dbg += '%s/' % self.id
dbg += '%s:' % self.thread_id
dbg += ' Task of %s' %... |
def _eval_args(args, my_task):
"""Parses args and evaluates any Attrib entries"""
results = []
for arg in args:
if isinstance(arg, Attrib) or isinstance(arg, PathAttrib):
results.append(valueof(my_task, arg))
else:
results.append(arg)
return results |
def _eval_kwargs(kwargs, my_task):
"""Parses kwargs and evaluates any Attrib entries"""
results = {}
for kwarg, value in list(kwargs.items()):
if isinstance(value, Attrib) or isinstance(value, PathAttrib):
results[kwarg] = valueof(my_task, value)
else:
results[kwarg] ... |
def Serializable(o):
"""Make sure an object is JSON-serializable
Use this to return errors and other info that does not need to be
deserialized or does not contain important app data. Best for returning
error info and such"""
if isinstance(o, (str, dict, int)):
return o
else:
try... |
def _send_call(self, my_task):
"""Sends Celery asynchronous call and stores async call information for
retrieval laster"""
args, kwargs = None, None
if self.args:
args = _eval_args(self.args, my_task)
if self.kwargs:
kwargs = _eval_kwargs(self.kwargs, my_t... |
def _restart(self, my_task):
""" Abort celery task and retry it"""
if not my_task._has_state(Task.WAITING):
raise WorkflowException(my_task, "Cannot refire a task that is not"
"in WAITING state")
# Check state of existing call and abort it (save hi... |
def _clear_celery_task_data(self, my_task):
""" Clear celery task data """
# Save history
if 'task_id' in my_task.internal_data:
# Save history for diagnostics/forensics
history = my_task._get_internal_data('task_history', [])
history.append(my_task._get_inter... |
def _start(self, my_task, force=False):
"""Returns False when successfully fired, True otherwise"""
# Deserialize async call if necessary
if not hasattr(my_task, 'async_call') and \
my_task._get_internal_data('task_id') is not None:
task_id = my_task._get_internal_da... |
def ancestors(self):
"""Returns list of ancestor task specs based on inputs"""
results = []
def recursive_find_ancestors(task, stack):
for input in task.inputs:
if input not in stack:
stack.append(input)
recursive_find_ancestor... |
def set_data(self, **kwargs):
"""
Defines the given data field(s) using the given name/value pairs.
"""
for key in kwargs:
if key in self.defines:
msg = "Spec data %s can not be modified" % key
raise WorkflowException(self, msg)
self.da... |
def connect(self, taskspec):
"""
Connect the *following* task to this one. In other words, the
given task is added as an output task.
:type taskspec: TaskSpec
:param taskspec: The new output task.
"""
self.outputs.append(taskspec)
taskspec._connect_notif... |
def _predict(self, my_task, seen=None, looked_ahead=0):
"""
Updates the branch such that all possible future routes are added.
Should NOT be overwritten! Instead, overwrite _predict_hook().
:type my_task: Task
:param my_task: The associated task in the task tree.
:type... |
def _update_hook(self, my_task):
"""
Typically this method should perform the following actions::
- Update the state of the corresponding task.
- Update the predictions for its successors.
Returning non-False will cause the task to go into READY.
Returning any o... |
def _on_ready(self, my_task):
"""
Return True on success, False otherwise.
:type my_task: Task
:param my_task: The associated task in the task tree.
"""
assert my_task is not None
self.test()
# Acquire locks, if any.
for lock in self.locks:
... |
def _on_complete(self, my_task):
"""
Return True on success, False otherwise. Should not be overwritten,
overwrite _on_complete_hook() instead.
:type my_task: Task
:param my_task: The associated task in the task tree.
:rtype: boolean
:returns: True on success, ... |
def create_package(self):
"""
Creates the package, writing the data out to the provided file-like
object.
"""
# Check that all files exist (and calculate the longest shared path
# prefix):
self.input_path_prefix = None
for filename in self.input_files:
... |
def write_file_to_package_zip(self, filename, src_filename):
"""
Writes a local file in to the zip file and adds it to the manifest
dictionary
:param filename: The zip file name
:param src_filename: the local file name
"""
f = open(src_filename)
with f:
... |
def write_to_package_zip(self, filename, data):
"""
Writes data to the zip file and adds it to the manifest dictionary
:param filename: The zip file name
:param data: the data
"""
self.manifest[filename] = md5hash(data)
self.package_zip.writestr(filename, data) |
def write_manifest(self):
"""
Write the manifest content to the zip file. It must be a predictable
order.
"""
config = configparser.ConfigParser()
config.add_section('Manifest')
for f in sorted(self.manifest.keys()):
config.set('Manifest', f.replace(... |
def pre_parse_and_validate(self, bpmn, filename):
"""
A subclass can override this method to provide additional parseing or
validation. It should call the parent method first.
:param bpmn: an lxml tree of the bpmn content
:param filename: the source file name
This must... |
def pre_parse_and_validate_signavio(self, bpmn, filename):
"""
This is the Signavio specific editor hook for pre-parsing and
validation.
A subclass can override this method to provide additional parseing or
validation. It should call the parent method first.
:param bpmn... |
def _fix_call_activities_signavio(self, bpmn, filename):
"""
Signavio produces slightly invalid BPMN for call activity nodes... It
is supposed to put a reference to the id of the called process in to
the calledElement attribute. Instead it stores a string (which is the
name of th... |
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