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"""Statistics application.""" |
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from pyof.v0x01.controller2switch.stats_request import StatsType |
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from kytos.core import KytosNApp, log |
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from kytos.core.helpers import listen_to |
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from napps.kytos.of_stats import settings |
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from napps.kytos.of_stats.stats import FlowStats, PortStats |
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class Main(KytosNApp): |
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"""Main class for statistics application.""" |
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def setup(self): |
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"""Initialize all statistics and set their loop interval.""" |
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self.execute_as_loop(settings.STATS_INTERVAL) |
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# Initialize statistics |
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msg_out = self.controller.buffers.msg_out |
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app_buffer = self.controller.buffers.app |
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self._stats = {StatsType.OFPST_PORT.value: PortStats(msg_out, |
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app_buffer), |
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StatsType.OFPST_FLOW.value: FlowStats(msg_out, |
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app_buffer)} |
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def execute(self): |
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"""Query all switches sequentially and then sleep before repeating.""" |
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switches = list(self.controller.switches.values()) |
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for switch in switches: |
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if switch.is_connected(): |
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self._update_stats(switch) |
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def shutdown(self): |
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"""End of the application.""" |
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log.debug('Shutting down...') |
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def _update_stats(self, switch): |
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for stats in self._stats.values(): |
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if switch.connection is not None: |
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stats.request(switch.connection) |
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@listen_to('kytos/of_core.v0x01.messages.in.ofpt_stats_reply') |
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def listen_v0x01(self, event): |
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"""Detect the message body type.""" |
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stats_reply = event.content['message'] |
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stats_type = stats_reply.body_type |
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self._listen(event, stats_type) |
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@listen_to('kytos/of_core.v0x04.messages.in.ofpt_multipart_reply') |
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def listen_v0x04(self, event): |
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"""Detect the message body type.""" |
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multipart_reply = event.content['message'] |
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stats_type = multipart_reply.multipart_type |
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self._listen(event, stats_type) |
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def _listen(self, event, stats_type): |
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"""Listen to all stats reply we deal with. |
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Note: v0x01 ``body_type`` and v0x04 ``multipart_type`` have the same |
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values. Besides, both ``msg.body`` have the fields/attributes we use. |
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Thus, we can treat them the same way and reuse the code. |
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""" |
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msg = event.content['message'] |
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if stats_type.value in self._stats: |
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stats = self._stats[stats_type.value] |
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stats_list = msg.body |
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stats.listen(event.source.switch, stats_list) |
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else: |
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log.debug('No listener for %s = %s in %s.', stats_type.name, |
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stats_type.value, list(self._stats.keys())) |
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kytos /
of_stats
