Source code for taskflow.patterns.unordered_flow

# -*- coding: utf-8 -*-

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#         http://www.apache.org/licenses/LICENSE-2.0
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#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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from taskflow import flow
from taskflow.types import graph as gr


[docs]class Flow(flow.Flow): """Unordered flow pattern. A unordered (potentially nested) flow of *tasks/flows* that can be executed in any order as one unit and rolled back as one unit. """ def __init__(self, name, retry=None): super(Flow, self).__init__(name, retry) self._graph = gr.Graph(name=name)
[docs] def add(self, *items): """Adds a given task/tasks/flow/flows to this flow.""" for item in items: if not self._graph.has_node(item): self._graph.add_node(item) return self
def __len__(self): return len(self._graph) def __iter__(self): for item in self._graph: yield item def iter_links(self): for (u, v, e_data) in self._graph.edges_iter(data=True): yield (u, v, e_data) def iter_nodes(self): for n, n_data in self._graph.nodes_iter(data=True): yield (n, n_data) @property def requires(self): requires = set() retry_provides = set() if self._retry is not None: requires.update(self._retry.requires) retry_provides.update(self._retry.provides) for item in self: item_requires = item.requires - retry_provides requires.update(item_requires) return frozenset(requires)