build.main.Main.remove_int_flows() - Code Metrics - Inspection of "Merge pull request #35 from kytos-ng/refactor/asyn..." - kytos-ng/telemetry_int - Measure and Improve Code Quality continuously with Scrutinizer

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by Vinicius

created 2023-09-01 18:30 UTC

build.main.Main.remove_int_flows() A

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Complexity

Conditions

Size

Total Lines	27
Code Lines	20

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	12

Importance

Changes

Metric	Value
cc	3
eloc	20
nop	2
dl	0
loc	27
ccs	0
cts	9
cp	0
crap	12
rs	9.4
c	0
b	0
f	0

"""Main module of kytos/telemetry Network Application.

Napp to deploy In-band Network Telemetry over Ethernet Virtual Circuits

"""

import napps.kytos.telemetry_int.kytos_api_helper as api
from napps.kytos.telemetry_int import settings, utils
from tenacity import RetryError

from kytos.core import KytosEvent, KytosNApp, log, rest
from kytos.core.helpers import alisten_to
from kytos.core.rest_api import HTTPException, JSONResponse, Request, aget_json_or_400

from .exceptions import (
    EVCHasINT,
    EVCHasNoINT,
    EVCNotFound,
    FlowsNotFound,
    ProxyPortNotFound,
    ProxyPortStatusNotUP,
    UnrecoverableError,
)
from .managers.int import INTManager

# pylint: disable=fixme


class Main(KytosNApp):
    """Main class of kytos/telemetry NApp.

    This class is the entry point for this NApp.
    """

    def setup(self):
        """Replace the '__init__' method for the KytosNApp subclass.

        The setup method is automatically called by the controller when your
        application is loaded.

        So, if you have any setup routine, insert it here.
        """

        self.int_manager = INTManager(self.controller)

    def execute(self):
        """Run after the setup method execution.

        You can also use this method in loop mode if you add to the above setup
        method a line like the following example:

            self.execute_as_loop(30)  # 30-second interval.
        """

    def shutdown(self):
        """Run when your NApp is unloaded.

        If you have some cleanup procedure, insert it here.
        """

    @rest("v1/evc/enable", methods=["POST"])

    async def enable_telemetry(self, request: Request) -> JSONResponse:
        """REST to enable INT flows on EVCs.

        If a list of evc_ids is empty, it'll enable on non-INT EVCs.
        """

        try:
            content = await aget_json_or_400(request)
            evc_ids = content["evc_ids"]
            force = content.get("force", False)
            if not isinstance(force, bool):
                raise TypeError(f"'force' wrong type: {type(force)} expected bool")
        except (TypeError, KeyError):
            raise HTTPException(400, detail=f"Invalid payload: {content}")

        try:
            evcs = (
                await api.get_evcs()
                if len(evc_ids) != 1
                else await api.get_evc(evc_ids[0])
            )
        except RetryError as exc:
            exc_error = str(exc.last_attempt.exception())
            log.error(exc_error)
            raise HTTPException(503, detail=exc_error)

        if evc_ids:
            evcs = {evc_id: evcs.get(evc_id, {}) for evc_id in evc_ids}
        else:
            evcs = {k: v for k, v in evcs.items() if not utils.has_int_enabled(v)}
            if not evcs:
                # There's no non-INT EVCs to get enabled.
                return JSONResponse({})

        try:
            await self.int_manager.enable_int(evcs, force)
        except (EVCNotFound, FlowsNotFound, ProxyPortNotFound) as exc:
            raise HTTPException(404, detail=str(exc))
        except (EVCHasINT, ProxyPortStatusNotUP) as exc:
            raise HTTPException(400, detail=str(exc))
        except RetryError as exc:
            exc_error = str(exc.last_attempt.exception())
            log.error(exc_error)
            raise HTTPException(503, detail=exc_error)
        except UnrecoverableError as exc:
            exc_error = str(exc)
            log.error(exc_error)
            raise HTTPException(500, detail=exc_error)

        return JSONResponse({}, status_code=201)

    @rest("v1/evc/disable", methods=["POST"])

    async def disable_telemetry(self, request: Request) -> JSONResponse:
        """REST to disable/remove INT flows for an EVC_ID

        If a list of evc_ids is empty, it'll disable on all INT EVCs.
        """
        try:
            content = await aget_json_or_400(request)
            evc_ids = content["evc_ids"]
            force = content.get("force", False)
            if not isinstance(force, bool):
                raise TypeError(f"'force' wrong type: {type(force)} expected bool")
        except (TypeError, KeyError):
            raise HTTPException(400, detail=f"Invalid payload: {content}")

        try:
            evcs = (
                await api.get_evcs()
                if len(evc_ids) != 1
                else await api.get_evc(evc_ids[0])
            )
        except RetryError as exc:
            exc_error = str(exc.last_attempt.exception())
            log.error(exc_error)
            raise HTTPException(503, detail=exc_error)

        if evc_ids:
            evcs = {evc_id: evcs.get(evc_id, {}) for evc_id in evc_ids}
        else:
            evcs = {k: v for k, v in evcs.items() if utils.has_int_enabled(v)}
            if not evcs:
                # There's no INT EVCs to get disabled.
                return JSONResponse({})

        try:
            await self.int_manager.disable_int(evcs, force)
        except EVCNotFound as exc:
            raise HTTPException(404, detail=str(exc))
        except EVCHasNoINT as exc:
            raise HTTPException(400, detail=str(exc))
        except RetryError as exc:
            exc_error = str(exc.last_attempt.exception())
            log.error(exc_error)
            raise HTTPException(503, detail=exc_error)
        except UnrecoverableError as exc:
            exc_error = str(exc)
            log.error(exc_error)
            raise HTTPException(500, detail=exc_error)

        return JSONResponse({})

    @rest("v1/evc")
    def get_evcs(self, _request: Request) -> JSONResponse:
        """REST to return the list of EVCs with INT enabled"""
        return JSONResponse(utils.get_evc_with_telemetry())

    @rest("v1/sync")
    def sync_flows(self, _request: Request) -> JSONResponse:
        """Endpoint to force the telemetry napp to search for INT flows and delete them
        accordingly to the evc metadata."""

        # TODO
        # for evc_id in get_evcs_ids():
        return JSONResponse("TBD")

    @rest("v1/evc/update")
    def update_evc(self, _request: Request) -> JSONResponse:
        """If an EVC changed from unidirectional to bidirectional telemetry,
        make the change."""
        return JSONResponse({})

    @alisten_to("kytos/mef_eline.deleted")
    async def on_evc_deleted(self, event: KytosEvent) -> None:
        """On EVC deleted."""
        content = event.content
        if (
            "metadata" in content
            and "telemetry" in content["metadata"]
            and content["metadata"]["telemetry"]["enabled"]
        ):
            evc_id = content["evc_id"]
            log.info(
                f"EVC({evc_id}, {content.get('name', '')}) got deleted, "
                "INT flows will be removed too"
            )
            stored_flows = await api.get_stored_flows(
                [utils.get_cookie(evc_id, settings.INT_COOKIE_PREFIX)]
            )
            await self.int_manager.remove_int_flows(stored_flows)

    # Event-driven methods: future
    def listen_for_new_evcs(self):
        """Change newly created EVC to INT-enabled EVC based on the metadata field
        (future)"""
        pass

    def listen_for_evc_change(self):
        """Change newly created EVC to INT-enabled EVC based on the
        metadata field (future)"""
        pass

    def listen_for_path_changes(self):
        """Change EVC's new path to INT-enabled EVC based on the metadata field
        when there is a path change. (future)"""
        pass

    def listen_for_evcs_removed(self):
        """Remove all INT flows belonging the just removed EVC (future)"""
        pass

    def listen_for_topology_changes(self):
        """If the topology changes, make sure it is not the loop ports.
        If so, update proxy ports"""
        # TODO:
        # self.proxy_ports = create_proxy_ports(self.proxy_ports)
        pass


1		"""Main module of kytos/telemetry Network Application.
2
3		Napp to deploy In-band Network Telemetry over Ethernet Virtual Circuits
4
5		"""
6
7		import napps.kytos.telemetry_int.kytos_api_helper as api
8		from napps.kytos.telemetry_int import settings, utils
9		from tenacity import RetryError
10
11		from kytos.core import KytosEvent, KytosNApp, log, rest
12		from kytos.core.helpers import alisten_to
13		from kytos.core.rest_api import HTTPException, JSONResponse, Request, aget_json_or_400
14
15		from .exceptions import (
16		EVCHasINT,
17		EVCHasNoINT,
18		EVCNotFound,
19		FlowsNotFound,
20		ProxyPortNotFound,
21		ProxyPortStatusNotUP,
22		UnrecoverableError,
23		)
24		from .managers.int import INTManager
25
26		# pylint: disable=fixme
27
28
29		class Main(KytosNApp):
30		"""Main class of kytos/telemetry NApp.
31
32		This class is the entry point for this NApp.
33		"""
34
35		def setup(self):
36		"""Replace the '__init__' method for the KytosNApp subclass.
37
38		The setup method is automatically called by the controller when your
39		application is loaded.
40
41		So, if you have any setup routine, insert it here.
42		"""
43
44		self.int_manager = INTManager(self.controller)
45
46		def execute(self):
47		"""Run after the setup method execution.
48
49		You can also use this method in loop mode if you add to the above setup
50		method a line like the following example:
51
52		self.execute_as_loop(30) # 30-second interval.
53		"""
54
55		def shutdown(self):
56		"""Run when your NApp is unloaded.
57
58		If you have some cleanup procedure, insert it here.
59		"""
60
61	View Code Duplication	@rest("v1/evc/enable", methods=["POST"])
		0 ignored issues – show Duplication introduced 2023-08-02 20:05 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
62		async def enable_telemetry(self, request: Request) -> JSONResponse:
63		"""REST to enable INT flows on EVCs.
64
65		If a list of evc_ids is empty, it'll enable on non-INT EVCs.
66		"""
67
68		try:
69		content = await aget_json_or_400(request)
70		evc_ids = content["evc_ids"]
71		force = content.get("force", False)
72		if not isinstance(force, bool):
73		raise TypeError(f"'force' wrong type: {type(force)} expected bool")
74		except (TypeError, KeyError):
75		raise HTTPException(400, detail=f"Invalid payload: {content}")
76
77		try:
78		evcs = (
79		await api.get_evcs()
80		if len(evc_ids) != 1
81		else await api.get_evc(evc_ids[0])
82		)
83		except RetryError as exc:
84		exc_error = str(exc.last_attempt.exception())
85		log.error(exc_error)
86		raise HTTPException(503, detail=exc_error)
87
88		if evc_ids:
89		evcs = {evc_id: evcs.get(evc_id, {}) for evc_id in evc_ids}
90		else:
91		evcs = {k: v for k, v in evcs.items() if not utils.has_int_enabled(v)}
92		if not evcs:
93		# There's no non-INT EVCs to get enabled.
94		return JSONResponse({})
95
96		try:
97		await self.int_manager.enable_int(evcs, force)
98		except (EVCNotFound, FlowsNotFound, ProxyPortNotFound) as exc:
99		raise HTTPException(404, detail=str(exc))
100		except (EVCHasINT, ProxyPortStatusNotUP) as exc:
101		raise HTTPException(400, detail=str(exc))
102		except RetryError as exc:
103		exc_error = str(exc.last_attempt.exception())
104		log.error(exc_error)
105		raise HTTPException(503, detail=exc_error)
106		except UnrecoverableError as exc:
107		exc_error = str(exc)
108		log.error(exc_error)
109		raise HTTPException(500, detail=exc_error)
110
111		return JSONResponse({}, status_code=201)
112
113	View Code Duplication	@rest("v1/evc/disable", methods=["POST"])
		0 ignored issues – show Duplication introduced 2023-08-02 20:05 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
114		async def disable_telemetry(self, request: Request) -> JSONResponse:
115		"""REST to disable/remove INT flows for an EVC_ID
116
117		If a list of evc_ids is empty, it'll disable on all INT EVCs.
118		"""
119		try:
120		content = await aget_json_or_400(request)
121		evc_ids = content["evc_ids"]
122		force = content.get("force", False)
123		if not isinstance(force, bool):
124		raise TypeError(f"'force' wrong type: {type(force)} expected bool")
125		except (TypeError, KeyError):
126		raise HTTPException(400, detail=f"Invalid payload: {content}")
127
128		try:
129		evcs = (
130		await api.get_evcs()
131		if len(evc_ids) != 1
132		else await api.get_evc(evc_ids[0])
133		)
134		except RetryError as exc:
135		exc_error = str(exc.last_attempt.exception())
136		log.error(exc_error)
137		raise HTTPException(503, detail=exc_error)
138
139		if evc_ids:
140		evcs = {evc_id: evcs.get(evc_id, {}) for evc_id in evc_ids}
141		else:
142		evcs = {k: v for k, v in evcs.items() if utils.has_int_enabled(v)}
143		if not evcs:
144		# There's no INT EVCs to get disabled.
145		return JSONResponse({})
146
147		try:
148		await self.int_manager.disable_int(evcs, force)
149		except EVCNotFound as exc:
150		raise HTTPException(404, detail=str(exc))
151		except EVCHasNoINT as exc:
152		raise HTTPException(400, detail=str(exc))
153		except RetryError as exc:
154		exc_error = str(exc.last_attempt.exception())
155		log.error(exc_error)
156		raise HTTPException(503, detail=exc_error)
157		except UnrecoverableError as exc:
158		exc_error = str(exc)
159		log.error(exc_error)
160		raise HTTPException(500, detail=exc_error)
161
162		return JSONResponse({})
163
164		@rest("v1/evc")
165		def get_evcs(self, _request: Request) -> JSONResponse:
166		"""REST to return the list of EVCs with INT enabled"""
167		return JSONResponse(utils.get_evc_with_telemetry())
168
169		@rest("v1/sync")
170		def sync_flows(self, _request: Request) -> JSONResponse:
171		"""Endpoint to force the telemetry napp to search for INT flows and delete them
172		accordingly to the evc metadata."""
173
174		# TODO
175		# for evc_id in get_evcs_ids():
176		return JSONResponse("TBD")
177
178		@rest("v1/evc/update")
179		def update_evc(self, _request: Request) -> JSONResponse:
180		"""If an EVC changed from unidirectional to bidirectional telemetry,
181		make the change."""
182		return JSONResponse({})
183
184		@alisten_to("kytos/mef_eline.deleted")
185		async def on_evc_deleted(self, event: KytosEvent) -> None:
186		"""On EVC deleted."""
187		content = event.content
188		if (
189		"metadata" in content
190		and "telemetry" in content["metadata"]
191		and content["metadata"]["telemetry"]["enabled"]
192		):
193		evc_id = content["evc_id"]
194		log.info(
195		f"EVC({evc_id}, {content.get('name', '')}) got deleted, "
196		"INT flows will be removed too"
197		)
198		stored_flows = await api.get_stored_flows(
199		[utils.get_cookie(evc_id, settings.INT_COOKIE_PREFIX)]
200		)
201		await self.int_manager.remove_int_flows(stored_flows)
202
203		# Event-driven methods: future
204		def listen_for_new_evcs(self):
205		"""Change newly created EVC to INT-enabled EVC based on the metadata field
206		(future)"""
207		pass
208
209		def listen_for_evc_change(self):
210		"""Change newly created EVC to INT-enabled EVC based on the
211		metadata field (future)"""
212		pass
213
214		def listen_for_path_changes(self):
215		"""Change EVC's new path to INT-enabled EVC based on the metadata field
216		when there is a path change. (future)"""
217		pass
218
219		def listen_for_evcs_removed(self):
220		"""Remove all INT flows belonging the just removed EVC (future)"""
221		pass
222
223		def listen_for_topology_changes(self):
224		"""If the topology changes, make sure it is not the loop ports.
225		If so, update proxy ports"""
226		# TODO:
227		# self.proxy_ports = create_proxy_ports(self.proxy_ports)
228		pass
229

kytos-ng / telemetry_int

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