tabpy.tabpy_server.management.state.TabPyState._check_target() - Code Metrics - Inspection of "Hotfix: model redeployment (#462)" - tableau/TabPy - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( f89136...5df0e0 )

by Oleksandr

created 2020-11-10 18:28 UTC

TabPyState._check_target() A

↳ Parent: tabpy.tabpy_server.management.state

Complexity

Conditions

Size

Total Lines	3
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	1
CRAP Score	5.667

Importance

Changes

Metric	Value
eloc	3
dl	0
loc	3
rs	10
c	0
b	0
f	0
ccs	1
cts	3
cp	0.3333
cc	3
nop	2
crap	5.667

try:
    from ConfigParser import ConfigParser
except ImportError:
    from configparser import ConfigParser
import json
import logging
from tabpy.tabpy_server.management.util import write_state_config
from threading import Lock
from time import time


logger = logging.getLogger(__name__)

# State File Config Section Names
_DEPLOYMENT_SECTION_NAME = "Query Objects Service Versions"
_QUERY_OBJECT_DOCSTRING = "Query Objects Docstrings"
_SERVICE_INFO_SECTION_NAME = "Service Info"
_META_SECTION_NAME = "Meta"

# Directory Names
_QUERY_OBJECT_DIR = "query_objects"

"""
Lock to change the TabPy State.
"""
_PS_STATE_LOCK = Lock()


def state_lock(func):
    """
    Mutex for changing PS state
    """

    def wrapper(self, *args, **kwargs):
        try:
            _PS_STATE_LOCK.acquire()
            return func(self, *args, **kwargs)
        finally:
            # ALWAYS RELEASE LOCK
            _PS_STATE_LOCK.release()

    return wrapper


def _get_root_path(state_path):
    if state_path[-1] != "/":
        state_path += "/"

    return state_path


def get_query_object_path(state_file_path, name, version):
    """
    Returns the query object path

    If the version is None, a path without the version will be returned.
    """
    root_path = _get_root_path(state_file_path)
    sub_path = [_QUERY_OBJECT_DIR, name]
    if version is not None:
        sub_path.append(str(version))
    full_path = root_path + "/".join(sub_path)
    return full_path


class TabPyState:
    """
    The TabPy state object that stores attributes
    about this TabPy and perform GET/SET on these
    attributes.

    Attributes:
        - name
        - description
        - endpoints (name, description, docstring, version, target)
        - revision number

    When the state object is initialized, the state is saved as a ConfigParser.
    There is a config to any attribute.

    """

    def __init__(self, settings, config=None):
        self.settings = settings
        self.set_config(config, _update=False)

    @state_lock
    def set_config(self, config, logger=logging.getLogger(__name__), _update=True):
        """
        Set the local ConfigParser manually.
        This new ConfigParser will be used as current state.
        """
        if not isinstance(config, ConfigParser):
            raise ValueError("Invalid config")
        self.config = config
        if _update:
            self._write_state(logger)

    def get_endpoints(self, name=None):
        """
        Return a dictionary of endpoints

        Parameters
        ----------
        name : str
            The name of the endpoint.
            If "name" is specified, only the information about that endpoint
            will be returned.

        Returns
        -------
        endpoints : dict
            The dictionary containing information about each endpoint.
            The keys are the endpoint names.
            The values for each include:
                - description
                - doc string
                - type
                - target

        """
        endpoints = {}
        try:
            endpoint_names = self._get_config_value(_DEPLOYMENT_SECTION_NAME, name)
        except Exception as e:
            logger.error(f"error in get_endpoints: {str(e)}")
            return {}

        if name:
            endpoint_info = json.loads(endpoint_names)
            docstring = self._get_config_value(_QUERY_OBJECT_DOCSTRING, name)
            endpoint_info["docstring"] = str(
                bytes(docstring, "utf-8").decode("unicode_escape")
            )
            endpoints = {name: endpoint_info}
        else:
            for endpoint_name in endpoint_names:
                endpoint_info = json.loads(
                    self._get_config_value(_DEPLOYMENT_SECTION_NAME, endpoint_name)
                )
                docstring = self._get_config_value(
                    _QUERY_OBJECT_DOCSTRING, endpoint_name, True, ""
                )
                endpoint_info["docstring"] = str(
                    bytes(docstring, "utf-8").decode("unicode_escape")
                )
                endpoints[endpoint_name] = endpoint_info
        logger.debug(f"Collected endpoints: {endpoints}")
        return endpoints

    def _check_endpoint_exists(self, name):
        endpoints = self.get_endpoints()
        if not name or not isinstance(name, str) or len(name) == 0:
            raise ValueError("name of the endpoint must be a valid string.")

        return name in endpoints

    def _check_and_set_endpoint_str_value(self, param, paramName, defaultValue):
        if not param and defaultValue is not None:
            return defaultValue

        if not param or not isinstance(param, str):
            raise ValueError(f"{paramName} must be a string.")

        return param

    def _check_and_set_endpoint_description(self, description, defaultValue):
        return self._check_and_set_endpoint_str_value(description, "description", defaultValue)

    def _check_and_set_endpoint_docstring(self, docstring, defaultValue):
        return self._check_and_set_endpoint_str_value(docstring, "docstring", defaultValue)

    def _check_and_set_endpoint_type(self, endpoint_type, defaultValue):
        return self._check_and_set_endpoint_str_value(
            endpoint_type, "endpoint type", defaultValue)

    def _check_target(self, target):
        if target and not isinstance(target, str):
            raise ValueError("target must be a string.")

    def _check_and_set_dependencies(self, dependencies, defaultValue):
        if not dependencies:
            return defaultValue

        if dependencies or not isinstance(dependencies, list):
            raise ValueError("dependencies must be a list.")

        return dependencies

    @state_lock
    def add_endpoint(
        self,
        name,
        description=None,
        docstring=None,
        endpoint_type=None,
        methods=None,
        target=None,
        dependencies=None,
        schema=None,
    ):
        """
        Add a new endpoint to the TabPy.

        Parameters
        ----------
        name : str
            Name of the endpoint
        description : str, optional
            Description of this endpoint
        doc_string : str, optional
            The doc string for this endpoint, if needed.
        endpoint_type : str
            The endpoint type (model, alias)
        target : str, optional
            The target endpoint name for the alias to be added.

        Note:
        The version of this endpoint will be set to 1 since it is a new
        endpoint.

        """
        try:
            if (self._check_endpoint_exists(name)):
                raise ValueError(f"endpoint {name} already exists.")

            endpoints = self.get_endpoints()

            description = self._check_and_set_endpoint_description(description, "")
            docstring = self._check_and_set_endpoint_docstring(
                docstring, "-- no docstring found in query function --")
            endpoint_type = self._check_and_set_endpoint_type(endpoint_type, None)
            dependencies = self._check_and_set_dependencies(dependencies, [])

            self._check_target(target)
            if target and target not in endpoints:
                raise ValueError("target endpoint is not valid.")

            endpoint_info = {
                "description": description,
                "docstring": docstring,
                "type": endpoint_type,
                "version": 1,
                "dependencies": dependencies,
                "target": target,
                "creation_time": int(time()),
                "last_modified_time": int(time()),
                "schema": schema,
            }

            endpoints[name] = endpoint_info
            self._add_update_endpoints_config(endpoints)
        except Exception as e:
            logger.error(f"Error in add_endpoint: {e}")
            raise

    def _add_update_endpoints_config(self, endpoints):
        # save the endpoint info to config
        dstring = ""
        for endpoint_name in endpoints:
            try:
                info = endpoints[endpoint_name]
                dstring = str(
                    bytes(info["docstring"], "utf-8").decode("unicode_escape")
                )
                self._set_config_value(
                    _QUERY_OBJECT_DOCSTRING,
                    endpoint_name,
                    dstring,
                    _update_revision=False,
                )
                del info["docstring"]
                self._set_config_value(
                    _DEPLOYMENT_SECTION_NAME, endpoint_name, json.dumps(info)
                )
            except Exception as e:
                logger.error(f"Unable to write endpoints config: {e}")
                raise

    @state_lock
    def update_endpoint(
        self,
        name,
        description=None,
        docstring=None,
        endpoint_type=None,
        version=None,
        methods=None,
        target=None,
        dependencies=None,
        schema=None,
    ):
        """
        Update an existing endpoint on the TabPy.

        Parameters
        ----------
        name : str
            Name of the endpoint
        description : str, optional
            Description of this endpoint
        doc_string : str, optional
            The doc string for this endpoint, if needed.
        endpoint_type : str, optional
            The endpoint type (model, alias)
        version : str, optional
            The version of this endpoint
        dependencies=[]
            List of dependent endpoints for this existing endpoint
        target : str, optional
            The target endpoint name for the alias.

        Note:
        For those parameters that are not specified, those values will not
        get changed.

        """
        try:
            if (not self._check_endpoint_exists(name)):
                raise ValueError(f"endpoint {name} does not exist.")

            endpoints = self.get_endpoints()
            endpoint_info = endpoints[name]

            description = self._check_and_set_endpoint_description(
                description, endpoint_info["description"])
            docstring = self._check_and_set_endpoint_docstring(
                docstring, endpoint_info["docstring"])
            endpoint_type = self._check_and_set_endpoint_type(
                endpoint_type, endpoint_info["type"])
            dependencies = self._check_and_set_dependencies(
                dependencies, endpoint_info.get("dependencies", []))

            self._check_target(target)
            if target and target not in endpoints:
                raise ValueError("target endpoint is not valid.")
            elif not target:
                target = endpoint_info["target"]

            if version and not isinstance(version, int):
                raise ValueError("version must be an int.")
            elif not version:
                version = endpoint_info["version"]

            endpoint_info = {
                "description": description,
                "docstring": docstring,
                "type": endpoint_type,
                "version": version,
                "dependencies": dependencies,
                "target": target,
                "creation_time": endpoint_info["creation_time"],
                "last_modified_time": int(time()),
                "schema": schema,
            }

            endpoints[name] = endpoint_info
            self._add_update_endpoints_config(endpoints)
        except Exception as e:
            logger.error(f"Error in update_endpoint: {e}")
            raise

    @state_lock
    def delete_endpoint(self, name):
        """
        Delete an existing endpoint on the TabPy

        Parameters
        ----------
        name : str
            The name of the endpoint to be deleted.

        Returns
        -------
        deleted endpoint object

        Note:
        Cannot delete this endpoint if other endpoints are currently
        depending on this endpoint.

        """
        if not name or name == "":
            raise ValueError("Name of the endpoint must be a valid string.")
        endpoints = self.get_endpoints()
        if name not in endpoints:
            raise ValueError(f"Endpoint {name} does not exist.")

        endpoint_to_delete = endpoints[name]

        # get dependencies and target
        deps = set()
        for endpoint_name in endpoints:
            if endpoint_name != name:
                deps_list = endpoints[endpoint_name].get("dependencies", [])
                if name in deps_list:
                    deps.add(endpoint_name)

        # check if other endpoints are depending on this endpoint
        if len(deps) > 0:
            raise ValueError(
                f"Cannot remove endpoint {name}, it is currently "
                f"used by {list(deps)} endpoints."
            )

        del endpoints[name]

        # delete the endpoint from state
        try:
            self._remove_config_option(
                _QUERY_OBJECT_DOCSTRING, name, _update_revision=False
            )
            self._remove_config_option(_DEPLOYMENT_SECTION_NAME, name)

            return endpoint_to_delete
        except Exception as e:
            logger.error(f"Unable to delete endpoint {e}")
            raise ValueError(f"Unable to delete endpoint: {e}")

    @property
    def name(self):
        """
        Returns the name of the TabPy service.
        """
        name = None
        try:
            name = self._get_config_value(_SERVICE_INFO_SECTION_NAME, "Name")
        except Exception as e:
            logger.error(f"Unable to get name: {e}")
        return name

    @property
    def creation_time(self):
        """
        Returns the creation time of the TabPy service.
        """
        creation_time = 0
        try:
            creation_time = self._get_config_value(
                _SERVICE_INFO_SECTION_NAME, "Creation Time"
            )
        except Exception as e:
            logger.error(f"Unable to get name: {e}")
        return creation_time

    @state_lock
    def set_name(self, name):
        """
        Set the name of this TabPy service.

        Parameters
        ----------
        name : str
            Name of TabPy service.
        """
        if not isinstance(name, str):
            raise ValueError("name must be a string.")
        try:
            self._set_config_value(_SERVICE_INFO_SECTION_NAME, "Name", name)
        except Exception as e:
            logger.error(f"Unable to set name: {e}")

    def get_description(self):
        """
        Returns the description of the TabPy service.
        """
        description = None
        try:
            description = self._get_config_value(
                _SERVICE_INFO_SECTION_NAME, "Description"
            )
        except Exception as e:
            logger.error(f"Unable to get description: {e}")
        return description

    @state_lock
    def set_description(self, description):
        """
        Set the description of this TabPy service.

        Parameters
        ----------
        description : str
            Description of TabPy service.
        """
        if not isinstance(description, str):
            raise ValueError("Description must be a string.")
        try:
            self._set_config_value(
                _SERVICE_INFO_SECTION_NAME, "Description", description
            )
        except Exception as e:
            logger.error(f"Unable to set description: {e}")

    def get_revision_number(self):
        """
        Returns the revision number of this TabPy service.
        """
        rev = -1
        try:
            rev = int(self._get_config_value(_META_SECTION_NAME, "Revision Number"))
        except Exception as e:
            logger.error(f"Unable to get revision number: {e}")
        return rev

    def get_access_control_allow_origin(self):
        """
        Returns Access-Control-Allow-Origin of this TabPy service.
        """
        _cors_origin = ""
        try:
            logger.debug("Collecting Access-Control-Allow-Origin from state file ...")
            _cors_origin = self._get_config_value(
                "Service Info", "Access-Control-Allow-Origin"
            )
        except Exception as e:
            logger.error(e)
        return _cors_origin

    def get_access_control_allow_headers(self):
        """
        Returns Access-Control-Allow-Headers of this TabPy service.
        """
        _cors_headers = ""
        try:
            _cors_headers = self._get_config_value(
                "Service Info", "Access-Control-Allow-Headers"
            )
        except Exception:
            pass
        return _cors_headers

    def get_access_control_allow_methods(self):
        """
        Returns Access-Control-Allow-Methods of this TabPy service.
        """
        _cors_methods = ""
        try:
            _cors_methods = self._get_config_value(
                "Service Info", "Access-Control-Allow-Methods"
            )
        except Exception:
            pass
        return _cors_methods

    def _set_revision_number(self, revision_number):
        """
        Set the revision number of this TabPy service.
        """
        if not isinstance(revision_number, int):
            raise ValueError("revision number must be an int.")
        try:
            self._set_config_value(
                _META_SECTION_NAME, "Revision Number", revision_number
            )
        except Exception as e:
            logger.error(f"Unable to set revision number: {e}")

    def _remove_config_option(
        self,
        section_name,
        option_name,
        logger=logging.getLogger(__name__),
        _update_revision=True,
    ):
        if not self.config:
            raise ValueError("State configuration not yet loaded.")
        self.config.remove_option(section_name, option_name)
        # update revision number
        if _update_revision:
            self._increase_revision_number()
        self._write_state(logger=logger)

    def _has_config_value(self, section_name, option_name):
        if not self.config:
            raise ValueError("State configuration not yet loaded.")
        return self.config.has_option(section_name, option_name)

    def _increase_revision_number(self):
        if not self.config:
            raise ValueError("State configuration not yet loaded.")
        cur_rev = int(self.config.get(_META_SECTION_NAME, "Revision Number"))
        self.config.set(_META_SECTION_NAME, "Revision Number", str(cur_rev + 1))

    def _set_config_value(
        self,
        section_name,
        option_name,
        option_value,
        logger=logging.getLogger(__name__),
        _update_revision=True,
    ):
        if not self.config:
            raise ValueError("State configuration not yet loaded.")

        if not self.config.has_section(section_name):
            logger.log(logging.DEBUG, f"Adding config section {section_name}")
            self.config.add_section(section_name)

        self.config.set(section_name, option_name, option_value)
        # update revision number
        if _update_revision:
            self._increase_revision_number()
        self._write_state(logger=logger)

    def _get_config_items(self, section_name):
        if not self.config:
            raise ValueError("State configuration not yet loaded.")
        return self.config.items(section_name)

    def _get_config_value(
        self, section_name, option_name, optional=False, default_value=None
    ):
        logger.log(
            logging.DEBUG,
            f"Loading option '{option_name}' from section [{section_name}]...")

        if not self.config:
            msg = "State configuration not yet loaded."
            logging.log(msg)
            raise ValueError(msg)

        res = None
        if not option_name:
            res = self.config.options(section_name)
        elif self.config.has_option(section_name, option_name):
            res = self.config.get(section_name, option_name)
        elif optional:
            res = default_value
        else:
            raise ValueError(
                f"Cannot find option name {option_name} "
                f"under section {section_name}"
            )

        logger.log(logging.DEBUG, f"Returning value '{res}'")
        return res

    def _write_state(self, logger=logging.getLogger(__name__)):
        """
        Write state (ConfigParser) to Consul
        """
        logger.log(logging.INFO, "Writing state to config")
        write_state_config(self.config, self.settings, logger=logger)


1	1	try:
2	1	from ConfigParser import ConfigParser
3	1	except ImportError:
4	1	from configparser import ConfigParser
5	1	import json
6	1	import logging
7	1	from tabpy.tabpy_server.management.util import write_state_config
8	1	from threading import Lock
9	1	from time import time
10
11
12	1	logger = logging.getLogger(__name__)
13
14		# State File Config Section Names
15	1	_DEPLOYMENT_SECTION_NAME = "Query Objects Service Versions"
16	1	_QUERY_OBJECT_DOCSTRING = "Query Objects Docstrings"
17	1	_SERVICE_INFO_SECTION_NAME = "Service Info"
18	1	_META_SECTION_NAME = "Meta"
19
20		# Directory Names
21	1	_QUERY_OBJECT_DIR = "query_objects"
22
23		"""
24		Lock to change the TabPy State.
25		"""
26	1	_PS_STATE_LOCK = Lock()
27
28
29	1	def state_lock(func):
30		"""
31		Mutex for changing PS state
32		"""
33
34	1	def wrapper(self, args, *kwargs):
35	1	try:
36	1	_PS_STATE_LOCK.acquire()
37	1	return func(self, args, *kwargs)
38		finally:
39		# ALWAYS RELEASE LOCK
40	1	_PS_STATE_LOCK.release()
41
42	1	return wrapper
43
44
45	1	def _get_root_path(state_path):
46	1	if state_path[-1] != "/":
47	1	state_path += "/"
48
49	1	return state_path
50
51
52	1	def get_query_object_path(state_file_path, name, version):
53		"""
54		Returns the query object path
55
56		If the version is None, a path without the version will be returned.
57		"""
58	1	root_path = _get_root_path(state_file_path)
59	1	sub_path = [_QUERY_OBJECT_DIR, name]
60	1	if version is not None:
61	1	sub_path.append(str(version))
62	1	full_path = root_path + "/".join(sub_path)
63	1	return full_path
64
65
66	1	class TabPyState:
67		"""
68		The TabPy state object that stores attributes
69		about this TabPy and perform GET/SET on these
70		attributes.
71
72		Attributes:
73		- name
74		- description
75		- endpoints (name, description, docstring, version, target)
76		- revision number
77
78		When the state object is initialized, the state is saved as a ConfigParser.
79		There is a config to any attribute.
80
81		"""
82
83	1	def __init__(self, settings, config=None):
84	1	self.settings = settings
85	1	self.set_config(config, _update=False)
86
87	1	@state_lock
88	1	def set_config(self, config, logger=logging.getLogger(__name__), _update=True):
89		"""
90		Set the local ConfigParser manually.
91		This new ConfigParser will be used as current state.
92		"""
93	1	if not isinstance(config, ConfigParser):
94		raise ValueError("Invalid config")
95	1	self.config = config
96	1	if _update:
97		self._write_state(logger)
98
99	1	def get_endpoints(self, name=None):
100		"""
101		Return a dictionary of endpoints
102
103		Parameters
104		----------
105		name : str
106		The name of the endpoint.
107		If "name" is specified, only the information about that endpoint
108		will be returned.
109
110		Returns
111		-------
112		endpoints : dict
113		The dictionary containing information about each endpoint.
114		The keys are the endpoint names.
115		The values for each include:
116		- description
117		- doc string
118		- type
119		- target
120
121		"""
122	1	endpoints = {}
123	1	try:
124	1	endpoint_names = self._get_config_value(_DEPLOYMENT_SECTION_NAME, name)
125		except Exception as e:
126		logger.error(f"error in get_endpoints: {str(e)}")
127		return {}
128
129	1	if name:
130		endpoint_info = json.loads(endpoint_names)
131		docstring = self._get_config_value(_QUERY_OBJECT_DOCSTRING, name)
132		endpoint_info["docstring"] = str(
133		bytes(docstring, "utf-8").decode("unicode_escape")
134		)
135		endpoints = {name: endpoint_info}
136		else:
137	1	for endpoint_name in endpoint_names:
138	1	endpoint_info = json.loads(
139		self._get_config_value(_DEPLOYMENT_SECTION_NAME, endpoint_name)
140		)
141	1	docstring = self._get_config_value(
142		_QUERY_OBJECT_DOCSTRING, endpoint_name, True, ""
143		)
144	1	endpoint_info["docstring"] = str(
145		bytes(docstring, "utf-8").decode("unicode_escape")
146		)
147	1	endpoints[endpoint_name] = endpoint_info
148	1	logger.debug(f"Collected endpoints: {endpoints}")
149	1	return endpoints
150
151	1	def _check_endpoint_exists(self, name):
152		endpoints = self.get_endpoints()
153		if not name or not isinstance(name, str) or len(name) == 0:
154		raise ValueError("name of the endpoint must be a valid string.")
155
156		return name in endpoints
157
158	1	def _check_and_set_endpoint_str_value(self, param, paramName, defaultValue):
159		if not param and defaultValue is not None:
160		return defaultValue
161
162		if not param or not isinstance(param, str):
163		raise ValueError(f"{paramName} must be a string.")
164
165		return param
166
167	1	def _check_and_set_endpoint_description(self, description, defaultValue):
168		return self._check_and_set_endpoint_str_value(description, "description", defaultValue)
169
170	1	def _check_and_set_endpoint_docstring(self, docstring, defaultValue):
171		return self._check_and_set_endpoint_str_value(docstring, "docstring", defaultValue)
172
173	1	def _check_and_set_endpoint_type(self, endpoint_type, defaultValue):
174		return self._check_and_set_endpoint_str_value(
175		endpoint_type, "endpoint type", defaultValue)
176
177	1	def _check_target(self, target):
178		if target and not isinstance(target, str):
179		raise ValueError("target must be a string.")
180
181	1	def _check_and_set_dependencies(self, dependencies, defaultValue):
182		if not dependencies:
183		return defaultValue
184
185		if dependencies or not isinstance(dependencies, list):
186		raise ValueError("dependencies must be a list.")
187
188		return dependencies
189
190	1	@state_lock
191	1	def add_endpoint(
192		self,
193		name,
194		description=None,
195		docstring=None,
196		endpoint_type=None,
197		methods=None,
198		target=None,
199		dependencies=None,
200		schema=None,
201		):
202		"""
203		Add a new endpoint to the TabPy.
204
205		Parameters
206		----------
207		name : str
208		Name of the endpoint
209		description : str, optional
210		Description of this endpoint
211		doc_string : str, optional
212		The doc string for this endpoint, if needed.
213		endpoint_type : str
214		The endpoint type (model, alias)
215		target : str, optional
216		The target endpoint name for the alias to be added.
217
218		Note:
219		The version of this endpoint will be set to 1 since it is a new
220		endpoint.
221
222		"""
223		try:
224		if (self._check_endpoint_exists(name)):
225		raise ValueError(f"endpoint {name} already exists.")
226
227		endpoints = self.get_endpoints()
228
229		description = self._check_and_set_endpoint_description(description, "")
230		docstring = self._check_and_set_endpoint_docstring(
231		docstring, "-- no docstring found in query function --")
232		endpoint_type = self._check_and_set_endpoint_type(endpoint_type, None)
233		dependencies = self._check_and_set_dependencies(dependencies, [])
234
235		self._check_target(target)
236		if target and target not in endpoints:
237		raise ValueError("target endpoint is not valid.")
238
239		endpoint_info = {
240		"description": description,
241		"docstring": docstring,
242		"type": endpoint_type,
243		"version": 1,
244		"dependencies": dependencies,
245		"target": target,
246		"creation_time": int(time()),
247		"last_modified_time": int(time()),
248		"schema": schema,
249		}
250
251		endpoints[name] = endpoint_info
252		self._add_update_endpoints_config(endpoints)
253		except Exception as e:
254		logger.error(f"Error in add_endpoint: {e}")
255		raise
256
257	1	def _add_update_endpoints_config(self, endpoints):
258		# save the endpoint info to config
259		dstring = ""
260		for endpoint_name in endpoints:
261		try:
262		info = endpoints[endpoint_name]
263		dstring = str(
264		bytes(info["docstring"], "utf-8").decode("unicode_escape")
265		)
266		self._set_config_value(
267		_QUERY_OBJECT_DOCSTRING,
268		endpoint_name,
269		dstring,
270		_update_revision=False,
271		)
272		del info["docstring"]
273		self._set_config_value(
274		_DEPLOYMENT_SECTION_NAME, endpoint_name, json.dumps(info)
275		)
276		except Exception as e:
277		logger.error(f"Unable to write endpoints config: {e}")
278		raise
279
280	1	@state_lock
281	1	def update_endpoint(
282		self,
283		name,
284		description=None,
285		docstring=None,
286		endpoint_type=None,
287		version=None,
288		methods=None,
289		target=None,
290		dependencies=None,
291		schema=None,
292		):
293		"""
294		Update an existing endpoint on the TabPy.
295
296		Parameters
297		----------
298		name : str
299		Name of the endpoint
300		description : str, optional
301		Description of this endpoint
302		doc_string : str, optional
303		The doc string for this endpoint, if needed.
304		endpoint_type : str, optional
305		The endpoint type (model, alias)
306		version : str, optional
307		The version of this endpoint
308		dependencies=[]
309		List of dependent endpoints for this existing endpoint
310		target : str, optional
311		The target endpoint name for the alias.
312
313		Note:
314		For those parameters that are not specified, those values will not
315		get changed.
316
317		"""
318		try:
319		if (not self._check_endpoint_exists(name)):
320		raise ValueError(f"endpoint {name} does not exist.")
321
322		endpoints = self.get_endpoints()
323		endpoint_info = endpoints[name]
324
325		description = self._check_and_set_endpoint_description(
326		description, endpoint_info["description"])
327		docstring = self._check_and_set_endpoint_docstring(
328		docstring, endpoint_info["docstring"])
329		endpoint_type = self._check_and_set_endpoint_type(
330		endpoint_type, endpoint_info["type"])
331		dependencies = self._check_and_set_dependencies(
332		dependencies, endpoint_info.get("dependencies", []))
333
334		self._check_target(target)
335		if target and target not in endpoints:
336		raise ValueError("target endpoint is not valid.")
337		elif not target:
338		target = endpoint_info["target"]
339
340		if version and not isinstance(version, int):
341		raise ValueError("version must be an int.")
342		elif not version:
343		version = endpoint_info["version"]
344
345		endpoint_info = {
346		"description": description,
347		"docstring": docstring,
348		"type": endpoint_type,
349		"version": version,
350		"dependencies": dependencies,
351		"target": target,
352		"creation_time": endpoint_info["creation_time"],
353		"last_modified_time": int(time()),
354		"schema": schema,
355		}
356
357		endpoints[name] = endpoint_info
358		self._add_update_endpoints_config(endpoints)
359		except Exception as e:
360		logger.error(f"Error in update_endpoint: {e}")
361		raise
362
363	1	@state_lock
364		def delete_endpoint(self, name):
365		"""
366		Delete an existing endpoint on the TabPy
367
368		Parameters
369		----------
370		name : str
371		The name of the endpoint to be deleted.
372
373		Returns
374		-------
375		deleted endpoint object
376
377		Note:
378		Cannot delete this endpoint if other endpoints are currently
379		depending on this endpoint.
380
381		"""
382		if not name or name == "":
383		raise ValueError("Name of the endpoint must be a valid string.")
384		endpoints = self.get_endpoints()
385		if name not in endpoints:
386		raise ValueError(f"Endpoint {name} does not exist.")
387
388		endpoint_to_delete = endpoints[name]
389
390		# get dependencies and target
391		deps = set()
392		for endpoint_name in endpoints:
393		if endpoint_name != name:
394		deps_list = endpoints[endpoint_name].get("dependencies", [])
395		if name in deps_list:
396		deps.add(endpoint_name)
397
398		# check if other endpoints are depending on this endpoint
399		if len(deps) > 0:
400		raise ValueError(
401		f"Cannot remove endpoint {name}, it is currently "
402		f"used by {list(deps)} endpoints."
403		)
404
405		del endpoints[name]
406
407		# delete the endpoint from state
408		try:
409		self._remove_config_option(
410		_QUERY_OBJECT_DOCSTRING, name, _update_revision=False
411		)
412		self._remove_config_option(_DEPLOYMENT_SECTION_NAME, name)
413
414		return endpoint_to_delete
415		except Exception as e:
416		logger.error(f"Unable to delete endpoint {e}")
417		raise ValueError(f"Unable to delete endpoint: {e}")
418
419	1	@property
420		def name(self):
421		"""
422		Returns the name of the TabPy service.
423		"""
424	1	name = None
425	1	try:
426	1	name = self._get_config_value(_SERVICE_INFO_SECTION_NAME, "Name")
427		except Exception as e:
428		logger.error(f"Unable to get name: {e}")
429	1	return name
430
431	1	@property
432		def creation_time(self):
433		"""
434		Returns the creation time of the TabPy service.
435		"""
436	1	creation_time = 0
437	1	try:
438	1	creation_time = self._get_config_value(
439		_SERVICE_INFO_SECTION_NAME, "Creation Time"
440		)
441		except Exception as e:
442		logger.error(f"Unable to get name: {e}")
443	1	return creation_time
444
445	1	@state_lock
446		def set_name(self, name):
447		"""
448		Set the name of this TabPy service.
449
450		Parameters
451		----------
452		name : str
453		Name of TabPy service.
454		"""
455		if not isinstance(name, str):
456		raise ValueError("name must be a string.")
457		try:
458		self._set_config_value(_SERVICE_INFO_SECTION_NAME, "Name", name)
459		except Exception as e:
460		logger.error(f"Unable to set name: {e}")
461
462	1	def get_description(self):
463		"""
464		Returns the description of the TabPy service.
465		"""
466	1	description = None
467	1	try:
468	1	description = self._get_config_value(
469		_SERVICE_INFO_SECTION_NAME, "Description"
470		)
471		except Exception as e:
472		logger.error(f"Unable to get description: {e}")
473	1	return description
474
475	1	@state_lock
476		def set_description(self, description):
477		"""
478		Set the description of this TabPy service.
479
480		Parameters
481		----------
482		description : str
483		Description of TabPy service.
484		"""
485		if not isinstance(description, str):
486		raise ValueError("Description must be a string.")
487		try:
488		self._set_config_value(
489		_SERVICE_INFO_SECTION_NAME, "Description", description
490		)
491		except Exception as e:
492		logger.error(f"Unable to set description: {e}")
493
494	1	def get_revision_number(self):
495		"""
496		Returns the revision number of this TabPy service.
497		"""
498		rev = -1
499		try:
500		rev = int(self._get_config_value(_META_SECTION_NAME, "Revision Number"))
501		except Exception as e:
502		logger.error(f"Unable to get revision number: {e}")
503		return rev
504
505	1	def get_access_control_allow_origin(self):
506		"""
507		Returns Access-Control-Allow-Origin of this TabPy service.
508		"""
509	1	_cors_origin = ""
510	1	try:
511	1	logger.debug("Collecting Access-Control-Allow-Origin from state file ...")
512	1	_cors_origin = self._get_config_value(
513		"Service Info", "Access-Control-Allow-Origin"
514		)
515		except Exception as e:
516		logger.error(e)
517	1	return _cors_origin
518
519	1	def get_access_control_allow_headers(self):
520		"""
521		Returns Access-Control-Allow-Headers of this TabPy service.
522		"""
523	1	_cors_headers = ""
524	1	try:
525	1	_cors_headers = self._get_config_value(
526		"Service Info", "Access-Control-Allow-Headers"
527		)
528		except Exception:
529		pass
530	1	return _cors_headers
531
532	1	def get_access_control_allow_methods(self):
533		"""
534		Returns Access-Control-Allow-Methods of this TabPy service.
535		"""
536	1	_cors_methods = ""
537	1	try:
538	1	_cors_methods = self._get_config_value(
539		"Service Info", "Access-Control-Allow-Methods"
540		)
541		except Exception:
542		pass
543	1	return _cors_methods
544
545	1	def _set_revision_number(self, revision_number):
546		"""
547		Set the revision number of this TabPy service.
548		"""
549		if not isinstance(revision_number, int):
550		raise ValueError("revision number must be an int.")
551		try:
552		self._set_config_value(
553		_META_SECTION_NAME, "Revision Number", revision_number
554		)
555		except Exception as e:
556		logger.error(f"Unable to set revision number: {e}")
557
558	1	def _remove_config_option(
559		self,
560		section_name,
561		option_name,
562		logger=logging.getLogger(__name__),
563		_update_revision=True,
564		):
565		if not self.config:
566		raise ValueError("State configuration not yet loaded.")
567		self.config.remove_option(section_name, option_name)
568		# update revision number
569		if _update_revision:
570		self._increase_revision_number()
571		self._write_state(logger=logger)
572
573	1	def _has_config_value(self, section_name, option_name):
574		if not self.config:
575		raise ValueError("State configuration not yet loaded.")
576		return self.config.has_option(section_name, option_name)
577
578	1	def _increase_revision_number(self):
579		if not self.config:
580		raise ValueError("State configuration not yet loaded.")
581		cur_rev = int(self.config.get(_META_SECTION_NAME, "Revision Number"))
582		self.config.set(_META_SECTION_NAME, "Revision Number", str(cur_rev + 1))
583
584	1	def _set_config_value(
585		self,
586		section_name,
587		option_name,
588		option_value,
589		logger=logging.getLogger(__name__),
590		_update_revision=True,
591		):
592		if not self.config:
593		raise ValueError("State configuration not yet loaded.")
594
595		if not self.config.has_section(section_name):
596		logger.log(logging.DEBUG, f"Adding config section {section_name}")
597		self.config.add_section(section_name)
598
599		self.config.set(section_name, option_name, option_value)
600		# update revision number
601		if _update_revision:
602		self._increase_revision_number()
603		self._write_state(logger=logger)
604
605	1	def _get_config_items(self, section_name):
606		if not self.config:
607		raise ValueError("State configuration not yet loaded.")
608		return self.config.items(section_name)
609
610	1	def _get_config_value(
611		self, section_name, option_name, optional=False, default_value=None
612		):
613	1	logger.log(
614		logging.DEBUG,
615		f"Loading option '{option_name}' from section [{section_name}]...")
616
617	1	if not self.config:
618		msg = "State configuration not yet loaded."
619		logging.log(msg)
620		raise ValueError(msg)
621
622	1	res = None
623	1	if not option_name:
624	1	res = self.config.options(section_name)
625	1	elif self.config.has_option(section_name, option_name):
626	1	res = self.config.get(section_name, option_name)
627		elif optional:
628		res = default_value
629		else:
630		raise ValueError(
631		f"Cannot find option name {option_name} "
632		f"under section {section_name}"
633		)
634
635	1	logger.log(logging.DEBUG, f"Returning value '{res}'")
636	1	return res
637
638	1	def _write_state(self, logger=logging.getLogger(__name__)):
639		"""
640		Write state (ConfigParser) to Consul
641		"""
642		logger.log(logging.INFO, "Writing state to config")
643		write_state_config(self.config, self.settings, logger=logger)
644

tableau / TabPy

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TabPyState._check_target() A

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