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from typing import Iterable |
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import attr |
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from so_magic.utils import Subject |
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from .datapoints.datapoints import DatapointsFactory, TabularData |
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import json |
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import logging |
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logger = logging.getLogger(__name__) |
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# TODO refactor to a composition (not inheritance) implementation of the below class |
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# reason is that it will be more evident that this class simply combines the |
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# features of 2 other classes (Subject & DatapointsFactory) to get the job done |
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@attr.s |
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class BroadcastingDatapointsFactory(DatapointsFactory): |
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"""Creates Datapoints objects and informs its subscribers when that happens. |
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A factory class that informs its subscribers when a new object that |
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implements the DatapointsInterface is created (following a request). |
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Args: |
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subject (Subject, optional): the subject of observation; the "thing" that others |
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listen to |
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""" |
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subject: Subject = attr.ib(init=True, default=Subject([])) |
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name: str = attr.ib(init=False, default='') |
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# TODO check if above can be removed, along with self.name = getattr(args[0], 'name', '') in 'create' method |
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def create(self, datapoints_factory_type: str, *args, **kwargs) -> Iterable: |
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"""Create new Datapoints and inform subscribers. |
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The factory method that returns a new object of DatapointsInterface, by |
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looking at the registered constructors to delegate the object creation. |
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Args: |
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datapoints_factory_type (str): the name of the "constructor" to use |
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Raises: |
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RuntimeError: [description] |
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Returns: |
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Iterable: instance implementing the DatapointsInterface |
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""" |
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self.subject.name = kwargs.pop('id', kwargs.pop('name', kwargs.pop('file_path', ''))) |
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if kwargs: |
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msg = f"Kwargs: [{', '.join(f'{k}: {v}' for k, v in kwargs.items())}]" |
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raise RuntimeError("The 'create' method of DatapointsFactory does not support kwargs:", msg) |
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self.subject.state = super().create(datapoints_factory_type, *args, **kwargs) |
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# logger.debug(f"Created datapoints: {json.dumps({ |
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# 'datapoints': self.subject.state, |
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# 'name': self.subject.name, |
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# })}") |
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print("Created datapoints: {}".format(json.dumps({ |
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'datapoints': str(self.subject.state), |
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'name': self.subject.name, |
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}))) |
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if args and not hasattr(self, '.name'): |
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self.name = getattr(args[0], 'name', '') |
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self.subject.notify() |
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return self.subject.state |
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boromir674 /
so-magic
