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"""Utilities for composing KytosEventBuffers""" |
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from janus import PriorityQueue, Queue |
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from kytos.core.helpers import get_thread_pool_max_workers |
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from .buffers import KytosEventBuffer |
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queue_classes = { |
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'queue': Queue, |
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'priority': PriorityQueue, |
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} |
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def process_queue(config: dict) -> Queue: |
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""" |
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Create a janus queue from a given config dict |
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""" |
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queue_type = queue_classes[config.get('type', 'queue')] |
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queue_size = config.get('maxsize', 0) |
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if isinstance(queue_size, str): |
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if queue_size.startswith('threadpool_'): |
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threadpool = queue_size[len('threadpool_'):] |
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queue_size = get_thread_pool_max_workers().get(threadpool, 0) |
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else: |
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raise TypeError( |
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'Expected int or str formatted ' |
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'as "threadpool_{threadpool_name}"' |
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) |
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return queue_type(maxsize=queue_size) |
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extension_processors = {} |
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def buffer_from_config(name: str, config: dict) -> KytosEventBuffer: |
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""" |
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Create a KytosEventBuffer from a given config dict |
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""" |
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buffer_cls = KytosEventBuffer |
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args = {} |
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# Process Queue Config |
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args['queue'] = process_queue(config.get('queue', {})) |
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buffer = buffer_cls(name, **args) |
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# Process Mixins |
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extensions: dict = config.get('extensions', []) |
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for extension in extensions: |
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extension_type = extension['type'] |
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extension_args = extension.get('args', {}) |
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buffer = extension_processors[extension_type](buffer, extension_args) |
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return buffer |
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kytos-ng /
kytos
