From 605bc9f59d60453bb4d568646eb42e81384321fb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ferm=C3=ADn=20Gal=C3=A1n=20M=C3=A1rquez?= Date: Tue, 24 May 2022 12:59:57 +0200 Subject: [PATCH] Initial commit --- .gitignore | 132 ++++ LICENSE | 661 +++++++++++++++++++ README.md | 5 + doc/best_practices.md | 170 +++++ python-lib/requirements.txt | 4 + python-lib/tc_etl_lib/README.md | 222 +++++++ python-lib/tc_etl_lib/setup.py | 56 ++ python-lib/tc_etl_lib/tc_etl_lib/__init__.py | 23 + python-lib/tc_etl_lib/tc_etl_lib/auth.py | 176 +++++ python-lib/tc_etl_lib/tc_etl_lib/cb.py | 219 ++++++ python-lib/test-tc_etl_lib.py | 91 +++ 11 files changed, 1759 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 README.md create mode 100644 doc/best_practices.md create mode 100644 python-lib/requirements.txt create mode 100644 python-lib/tc_etl_lib/README.md create mode 100644 python-lib/tc_etl_lib/setup.py create mode 100644 python-lib/tc_etl_lib/tc_etl_lib/__init__.py create mode 100644 python-lib/tc_etl_lib/tc_etl_lib/auth.py create mode 100644 python-lib/tc_etl_lib/tc_etl_lib/cb.py create mode 100644 python-lib/test-tc_etl_lib.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..3988459 --- /dev/null +++ b/.gitignore @@ -0,0 +1,132 @@ +# Byte-compiled / optimized / DLL files +__pycache__/ +*.py[cod] +*$py.class + +# C extensions +*.so + +# Distribution / packaging +.Python +build/ +develop-eggs/ +dist/ +downloads/ +eggs/ +.eggs/ +lib/ +lib64/ +parts/ +sdist/ +var/ +wheels/ +pip-wheel-metadata/ +share/python-wheels/ +*.egg-info/ +.installed.cfg +*.egg +MANIFEST + +# PyInstaller +# Usually these files are written by a python script from a template +# before PyInstaller builds the exe, so as to inject date/other infos into it. +*.manifest +*.spec + +# Installer logs +pip-log.txt +pip-delete-this-directory.txt + +# Unit test / coverage reports +htmlcov/ +.tox/ +.nox/ +.coverage +.coverage.* +.cache +nosetests.xml +coverage.xml +*.cover +*.py,cover +.hypothesis/ +.pytest_cache/ + +# Translations +*.mo +*.pot + +# Django stuff: +*.log +local_settings.py +db.sqlite3 +db.sqlite3-journal + +# Flask stuff: +instance/ +.webassets-cache + +# Scrapy stuff: +.scrapy + +# Sphinx documentation +docs/_build/ + +# PyBuilder +target/ + +# Jupyter Notebook +.ipynb_checkpoints + +# IPython +profile_default/ +ipython_config.py + +# pyenv +.python-version + +# pipenv +# According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control. +# However, in case of collaboration, if having platform-specific dependencies or dependencies +# having no cross-platform support, pipenv may install dependencies that don't work, or not +# install all needed dependencies. +#Pipfile.lock + +# PEP 582; used by e.g. github.com/David-OConnor/pyflow +__pypackages__/ + +# Celery stuff +celerybeat-schedule +celerybeat.pid + +# SageMath parsed files +*.sage.py + +# Environments +.env +.venv +env/ +venv/ +ENV/ +env.bak/ +venv.bak/ + +# Spyder project settings +.spyderproject +.spyproject + +# Rope project settings +.ropeproject + +# mkdocs documentation +/site + +# mypy +.mypy_cache/ +.dmypy.json +dmypy.json + +# Pyre type checker +.pyre/ + +# PyCharm files +.idea diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..d5445e7 --- /dev/null +++ b/LICENSE @@ -0,0 +1,661 @@ +GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Affero General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..bb35797 --- /dev/null +++ b/README.md @@ -0,0 +1,5 @@ +# etl-framework +Framework de ETLs (librerias, documentación, best practices, etc.) + +* [Creacion y mantimiento de ETLs](doc/best_practices.md) +* [Librería en Python para ETLS](python-lib/tc_etl_lib/README.md) diff --git a/doc/best_practices.md b/doc/best_practices.md new file mode 100644 index 0000000..1e45462 --- /dev/null +++ b/doc/best_practices.md @@ -0,0 +1,170 @@ +# # ETLS - Recomendaciones y directrices - EPG (Enhancement Proposals and Guidelines) + +* [Versión](#version) +* [Uso de la librería común](#tc_etl_lib) +* [Log format](#logging-format) +* [Logging niveles y f-strings](#logging-string) +* [Configuración de la ETL](#etl-config) +* [Ficheros CSV](#etl-csv) + +## Versión de Python + +Para los desarrollos de ETLs se usa la versión >= 3.8 de Python. [Ref.](https://docs.python.org/3.8/) + +Para ejecutar las ETLs en python, se hace uso de Virtual Enviroment, referenciado como venv. Este entorno virtualizado, permite trabajar con python en un entorno controlado, donde poder instalar las librerías que se necesitan en cada momento, independiente de las librerías generales que tenga el sistema instalado. [Ref.](https://docs.python.org/3/library/venv.html) + +## Uso de la librería común + +Se ha creado una librería (`tc_etl_lib`) que recoge las funciones más comunes utilizadas en las ETLs. Esta librería engloba llamadas relacionadas con la autentificación y comunicación con el Context Broker. Siempre que sea posible, se debería de utilizar esta librería en su última versión. + +Las funciones que actualmente soporta la librería son: +- Librería tc_etl_lib + - modulo `auth`: Módulo que incluye funciones relacionadas con la autenticación. + - `get_auth_token_subservice`: Función identificarse mediante usuario y contraseña y recibir un token con el que operar. + - modulo `cb`: Módulo que incluye funciones relacionadas con la comunicación con el Context Broker. + - `send_batch`: Función que envía un lote de entidades al Context Broker. Recibe un listado con todos los tokens por subservicio y usa el correspondiente para realizar la llamada al Context Broker. Si no se dispone de token o ha caducado, se solicita o renueva el token según el caso y luego envía los datos. + - `get_entities_page`: Función que permite la recogida de datos del Context Broker. Permite el uso de ciertos parámetros como offset, limit, orderBy y type para filtrar la recogida de datos. + +Se puede encontrar más detalles de la librería en la documentación de esta. [Ref.](../python-lib/tc_etl_lib/README.md) + +## Logging formato + +Se recomienda mantener el mismo formato de log en todas las ETLs, ya que eso facilita el uso de las herramientas comunes para procesar esos logs a posteriori. + +Para ello se recomienda el siguiente formato: + +``` +time= | lvl= | comp=| op=[]: | msg=mensaje + +``` + +El formato de log, se puede configurar de la siguiente manera: + +``` Python +# import logging +import logging + +# sets the logging configuration +logging.basicConfig( + level=logging.DEBUG, + format="time=%(asctime)s | lvl=%(levelname)s | comp=%(name)s | op=%(filename)s[%(lineno)d]:%(funcName)s | msg=%(message)s", + handlers=[ + logging.StreamHandler() + ] +) + +# get logger to use it +logger = logging.getLogger() + +# log something +logger.info('lore ipsum...') +``` + +## Logging niveles y f-strings + +Es recomendable, cuando estés codificando agrupar la información del log, en los diferentes niveles, pensando en que información, puede ser prescindible, pero de ayuda (DEBUG), información de ejecución (INFO), información importante a tener en cuenta (WARNING) o errores (ERROR). + +Teniendo en cuenta que mensajes van a ser importantes que sean visibles en LIVE (producción), cuando se está desarrollando o cuando se está depurando. + +Hay diferentes maneras de mostrar una cadena en el log. Se puede usar los mecanismos "old-school": %-formatting, str.format() o f-Strings, el mecanismo de f-String se incorporó desde Python 3.6 [Ref.PEP 498](https://peps.python.org/pep-0498/). A continuación mostramos ejemplos de cada uno: + +`%-formatting` + +``` Python +logger.info("Hello, %s. You are %s." % (name, age)) +``` + +`str.format` + +``` Python +logger.info("Hello, {1}. You are {0}.".format(age, name)) +``` + +`f-String` +``` Python +logger.info(f"Hello, {name}. You are {age}.") +``` + +El mecanismo de f-String a la hora de formatear los strings (y en este caso usarlo en el log), es más rápido y comprensible que los mecanismos anteriores. Por lo tanto f-String es el recomendado a usar. + +## Configuración de la ETL + +Cada ETL tiene su propia configuración, dependiendo de su necesidades a nivel funcional. Es importante parametrizar todo lo posible y que las ETLs sean lo más flexible posible. Para ello, se usa un fichero de configuración `config.cfg` donde viene una configuración básica que es común para todas las ETLs y luego una configuración concreta según las necesidades. Este fichero tiene el siguiente formato: + +``` +[environment] +protocol = http +endpoint_cb = : +endpoint_keystone = : +service = dip_castellon +subservice = /energia +user = admin_castellon +password = xxx +``` + +A la hora de recoger esa configuración, la realizamos con `configparser` [Ref.](https://docs.python.org/3/library/configparser.html) +Configparser te permite la recogida de datos con cierto formato, usando get, getint, getboolean. + +``` Python + +#import confirparser +import configparser + + +# Gets the config +config = configparser.ConfigParser() +config.read(module_path.parent.joinpath('config.cfg')) + +# Checks if the config has a environment section +if 'environment' not in config.sections(): + logger.error('Environment configuration not found') + sys.exit() + +# Get the config variables +protocol = config.get('environment', 'protocol') +endpoint_cb = config.get('environment', 'endpoint_cb') +``` + +## Manejo de CSV en las ETLs + +Para la recogida de datos de CSV en las ETLs, se recomienda usar la librería `panda`, que dispone de mecanismos de captación de datos, entre ellos importanción de datos desde CSV. [Ref.](https://pandas.pydata.org/docs/user_guide/io.html#io-read-csv-table) + +Para la lectura de un csv, se necesita los siguientes parámetros: +- csv_name: nombre del csv +- sep: separador del csv +- usecols: indices de las columnas +- names: array con el nombre de las columnas. +- encoding: codificación del fichero + +Ejemplo de uso + +``` Python +# import library +import pandas as pd + +# define columns data +csv_municipality_column_cif = "CIF" +csv_municipality_column_name= "NAME" +csv_municipality_column_municipality= "MUNICIPALITY" + +csv_municipality_columns_names = [ + csv_municipality_column_cif, + csv_municipality_column_name, + csv_municipality_column_municipality] + +csv_municipality_columns_index = [0, 1, 2] + +# read data from csv +df = pd.read_csv(csv_name, sep=",", dtype="object", + usecols=csv_municipality_columns_index, names=csv_municipality_columns_names, + header=None, encoding="UTF-8") + +# use data +for index, row in df.iterrows(): + # Check if csv contains header + if row[csv_municipality_column_cif] == csv_municipality_column_cif: + logger.warning(f'Line {index + 1} ignored: This line contains the header') + else: + logger.warning(f'Data CIF: {row[csv_municipality_column_cif]}') + ... +``` \ No newline at end of file diff --git a/python-lib/requirements.txt b/python-lib/requirements.txt new file mode 100644 index 0000000..5726b66 --- /dev/null +++ b/python-lib/requirements.txt @@ -0,0 +1,4 @@ +# +# fichero de ejemplo de requirements.txt para enlazar con al librería tc_etl_lib +# +tc_etl_lib @ git+https://github.com/telefonicasc/etl-framework#package=tc_etl_lib&subdirectory=python-lib/tc_etl_lib \ No newline at end of file diff --git a/python-lib/tc_etl_lib/README.md b/python-lib/tc_etl_lib/README.md new file mode 100644 index 0000000..a4a0702 --- /dev/null +++ b/python-lib/tc_etl_lib/README.md @@ -0,0 +1,222 @@ +# Librería Python para ETLs + +Esta librería tiene funciones comunes que pueden ser útiles para uso en las ETLs. + +## Empaquetado de la librería + +La librería permite versionado y se puede acceder a las diferentes versiones en `dist`. En ese directorio se van acumulando el empaquetado de cada versión de la librería. + +Para empaquetar se procede de la siguiente manera: + +* En el fichero de configuración [setup.py](./setup.py) hay una variable `VERSION` que indica la versión. Se debe incrementar esta versión al empaquetar. +* Se puede empaquetar la librería en diferentes formatos, dependiendo del sistema operativo desde que se ejecuta, puede ser zip, tar.gz, etc.. Por defecto en linux, si no le indicas un formato concreto, usará el .tar.gz. El empaquetado, creará un archivo en la carpeta /dist/ del tipo `tc_etl_lib-.tar.gz`, que se puede utilizar en los proyectos que sea necesario. Se empaqueta mediante el siguiente comando: + + python3 setup.py sdist bdist_wheel + +* Una vez generada la librería, se puede utilizar desde cualquier proyecto instalándola mediante `pip` + +## Instalación de la librería + +La librería de tipo `tc_etl_lib-.tar.gz`, se puede instalar en cualquier entorno python con el siguiente comando: + + pip install ./tc_etl_lib/dist/tc_etl_lib-0.0.1.tar.gz + +En este caso, la librería está disponible en ese directorio. Si estuviera disponible en cualquier otra ruta, se debería de reemplazar por la ruta relativa o absoluta correspondiente. Si se quiere instalar sobre un entorno venv, primero has de activar el entorno venv y luego ejecutar el comando de instalación de la librería. + +Pueden obtenerlse los .tar.gz correspondientes a cada versión de la libreria en [este enlace](https://github.com/telefonicasc/etl-framework/releases). + +La librería se puede instalar usando el repositorio remoto de github, para ello se ha de añadir la siguiente linea en el fichero requirements.txt. + +Para instalar una versión concreta + +``` +tc_etl_lib @ git+https://github.com/telefonicasc/etl-framework@{tag_version}#package=tc_etl_lib&subdirectory=python-lib/tc_etl_lib +``` + +Donde: + + {tag_version} : Acceso a una versión concreta de la librería. + +Para instalar la última versión + +``` +tc_etl_lib @ git+https://github.com/telefonicasc/etl-framework#package=tc_etl_lib&subdirectory=python-lib/tc_etl_lib +``` + +Una vez añadida esa referencia en requeriments.txt, se puede instalar con el comando: + + pip install -r requirements.txt + +## Uso de la librería + +El uso de la librería una vez se ha instalado en el venv, es similar al resto de librerías que dispondrías en python. A continuación mostramos un ejemplo de referencia: + +```python +# import library +import tc_etl_lib as tc +import json + +# create a auth manager and use it +auth: tc.auth.authManager = tc.auth.authManager(endpoint='http://:', + service = 'alcobendas', + user = 'usuario_alcobendas', + password = 'xxx') + +auth.get_auth_token_subservice(subservice = '/energia') + +# create a cb manager and use it +cbm: tc.cb.cbManager = tc.cb.cbManager(endpoint = 'http://:') +entities = cbm.get_entities_page(subservice='/energia', auth=auth, type='myType') + +# have a look to the retrieved entities +print (json.dumps(entities)) +``` + +Ejemplo de uso de Recogida de todos los datos de tipo SupplyPoint con paginación: + +```python +# import library +import tc_etl_lib as tc + +# declare authManager +auth: tc.auth.authManager = tc.auth.authManager(endpoint='http://:', + service = 'alcobendas', + subservice = '/energia', + user = 'usuario_alcobendas', + password = 'xxx') +# get token +try: + token = auth.get_auth_token_subservice() + logger.info(f'token: {token}') +except Exception as err: + logger.error('get_auth_token_subservice problems!!') + logger.error(err) + +# get all SupplyPoint entities with pg +cbm: tc.cb.cbManager = tc.cb.cbManager(endpoint = 'http://:') + +pg = 1 +limit = 5 +entities = None +while entities != []: + entities = cbm.get_entities_page(auth = auth, offset = (pg-1)*limit, limit = limit, type='SupplyPoint') + for i, item in enumerate(entities): + logger.info(f'(pg:{pg})[{i + (pg-1)*limit}]--> {item["id"]} ({item["type"]})') + pg += 1 +``` + +Ejemplo de Envío de datos en ráfaga + +```python +# import library +import tc_etl_lib as tc + +# declare authManager +auth: tc.auth.authManager = tc.auth.authManager(endpoint='http://:', + service = 'alcobendas', + subservice = '/energia', + user = 'usuario_alcobendas', + password = 'xxx') + +# get token +try: + auth.get_auth_token_subservice() +except Exception as err: + logger.error('get_auth_token_subservice problems!!') + logger.error(err) + +# send entities +cbm: tc.cb.cbManager = tc.cb.cbManager(endpoint = 'http://:') + +entities = [ + { + "id": "myEntity1", + "type": "myType", + "description": { + "value": "My first happy entity", + "type": "Text" + }, + "online": { + "value": 'true', + "type": "Boolean" + }, + "temperature": { + "value": '42.3', + "type": "Number" + } + }, + { + "id": "myEntity2", + "type": "myType", + "description": { + "value": "My second happy entity", + "type": "Text" + }, + "online": { + "value": 'false', + "type": "Boolean" + }, + "temperature": { + "value": '12.3', + "type": "Number" + } + } + ] + +cbm.send_batch(auth=auth, subservice='/energia', entities=entities) + +``` + +## Funciones disponibles en la librería + +La librería está creada con diferentes clases dependiendo de la funcionalidad deseada. + +- Clase `authManager`: En esta clase están las funciones relacionadas con la Autenticación (IDM). + - `__init()__`: constructor de objetos de la clase + - :param obligatorio `endpoint`: define el endpoint de identificación (ejemplo: https://``:``). Se debe especificar en el constructor del objeto de tipo authManager, sino avisará con una excepción ValueError. + - :param obligatorio `user`: define el usuario para identificarse. Se debe especificar en el constructor del objeto de tipo authManager, sino avisará con una excepción ValueError. + - :param obligatorio `password`: define la contraseña para identificarse. Se debe especificar en el constructor del objeto de tipo authManager, sino avisará con una excepción ValueError. + - :param obligatorio `service`: define el servicio donde identificarse. Se debe especificar en el constructor del objeto del tipo authManager, sino avisará con una excepción ValueError. + - :param opcional `subservice`: define el subservicio donde identificarse. Se puede especificar en el constructor o a posteriori cuando se llamen a las funciones del cbManager. + - :raises [ValueError](https://docs.python.org/3/library/exceptions.html#ValueError): Se lanza cuando le falta alguno de los argumentos obligatorios + - `get_auth_token_subservice`: Realiza una petición de token al IDM, identificándose con los creenciales de usuario + contraseña, servicio y subservicio. El token obtenido se almacena internamente en un caché dentro del propio objeto, de forma + que otras funciones de la librería que hagan uso del authManager (pe. las del cbManager) intentará utilizar siempre primero + este caché antes que solicitar un nuevo token via API del IDM. + - :param opcional `subservice`: se define el subservicio al que identificarse. Este parámetro es opcional. Si no se le indica, cogerá el subservicio inicializado en el objeto de tipo authManager que esté llamando la función. Si no está inicializado en el objeto ni se pasa por parámetro, se lanzará un ValueError. + - :raises [ValueError](https://docs.python.org/3/library/exceptions.html#ValueError): Se lanza cuando le falta algún argumento o inicializar alguna variable del objeto authManager, para poder realizar la autenticación. + - :raises [Exception](https://docs.python.org/3/library/exceptions.html#Exception): Se lanza cuando el servicio de identificación, responde con un error concreto. + - :return: El token que te asigna el servicio de identificación, a parte internamente authManager almacena en caché el token que ha recibido de la autenticación para cada servicio, por si lo necesita a postetiori para realizar acciones con ese token. +- Clase `cbManager`: En esta clase están funciones para la interacción con el Context Broker. + - `__init()__`: constructor de objetos de la clase + - :param obligatorio `endpoint`: define el endpoint del context broker (ejemplo: https://``:``). Se debe especificar en el constructor del objeto de tipo cbManager, sino avisará con una excepción ValueError. + - :param opcional `timeout`: timeout definido en segundos (default: 10). + - :param opcional `post_retry_connect`: Número de reintentos a la hora de realizar un envío de datos (default: 3) + - :param opcional `post_retry_backoff_factor`: Factor que se usa, para esperar varios segundos tras enviar una ráfaga de datos. (default: 0) + - :param opcional `sleep_send_batch`: Pausa en segundos, que se realiza cada vez que se envia una ráfaga de datos. (default: 0). + - :param opcional `cb_flowcontrol`: Opción del Context Broker, que permite un mejor rendimiento en caso de envío masivo de datos (batch updates). Este mecanismo, requiere arrancar el Context Broker con un flag concreto y en las peticiones de envío de datos, añadir esa opción. Referencia en [documentación de Orion](https://fiware-orion.readthedocs.io/en/master/admin/perf_tuning/index.html#updates-flow-control-mechanism) (default: False) + - :raises [ValueError](https://docs.python.org/3/library/exceptions.html#ValueError): Se lanza cuando le falta alguno de los argumentos obligatorios + - `send_batch`: Función que envía un lote de entidades al Context Broker. Se le pasa el authManager, que ya dispone de un listado con todos los tokens por subservicio y usa el correspondiente para realizar la llamada al Context Broker. Si no se dispone de token o ha caducado, se solicita nuevo y luego envía los datos. + - :param obligatorio `auth`: Se le proporciona el authManager, que tiene las credenciales por si ha de solicitar un token y dispone del listado de tokens asociado. Si no se define en la llamada a la función, avisará con una excepción ValueError. + - :param obligatorio `entities`: Listado de entidades a enviar, Si no se define en la llamada a la función, avisará con una excepción ValueError. + - :param opcional `subservice`: Se puede indicar al subservicio al que se le quiere enviar los datos. Sino se indica, usará el que haya inicializado en el objeto authManager. Sino dispone ninguno de los dos definidos, lanzará un ValueError indicando que necesita definirse el subservicio. + - :raises [ValueError](https://docs.python.org/3/library/exceptions.html#ValueError): Se lanza cuando le falta algún argumento o inicializar alguna varibale del objeto cbManager, para poder realizar la autenticación o envío de datos. + - :raises [Exception](https://docs.python.org/3/library/exceptions.html#Exception): Se lanza cuando el servicio de Context Broker, responde con un error concreto. + - :return: True si la operación es correcta (i.e. el CB devolió un code http 204). + - `get_entities_page`: Función que recoge datos del Context Broker. Se le pasa el authManager, que ya dispone de un listado con todos los tokens por subservicio y usa el correspondiente para realizar la llamada al Context Broker. Si no se dispone de token o ha caducado, se solicita nuevo y luego recoge los datos. + - :param obligatorio `auth`: Se le proporciona el authManager, que tiene las credenciales por si ha de solicitar un token y dispone del listado de tokens asociado. Si no se define en la llamada a la función, avisará con una excepción ValueError. + - :param opcional `subservice`: Se puede indicar al subservicio al que se le quiere enviar los datos. Sino se indica, usará el que haya inicializado en el objeto authManager. Sino dispone ninguno de los dos definidos, lanzará un ValueError indicando que necesita definirse el subservicio. + - :param opcional `offset`: Se establece el offset cuando se recogen los datos. Si no se especifica, enviará la petición al Context Broker sin offset definido. Por lo tanto se aplicará el valor offset por defecto que tiene el Context Broker que es 0. + - :param opcional `limit`: Se establece un límite de recogida de datos. Si no se especifica, enviará la petición al Context Broker sin el limit definido, por lo tanto se aplirá el valor de limit por defecto que tiene el Context Broker, que es 20. + - :param opcional `type`: Se establece la recogida de un tipo de datos. Si no se especifica, enviará la petición al Context Broker sin el type definido, por lo tanto los datos no serán filtrados por el tipo de entidad. + - :param opcional `orderBy`: Se establece un orden en la recogida de datos. Si no se especifica, enviará la petición al Contexts Broker sin el orderBy definido, por lo tanto aplicará el orden por defecto en el Context Broker (i.e. orden de fecha de creación de la entidades) + - :raises [ValueError](https://docs.python.org/3/library/exceptions.html#ValueError): Se lanza cuando le falta algún argumento o inicializar alguna varibale del objeto cbManager, para poder realizar la autenticación o envío de datos. + - :raises FetchError: Se lanza cuando el servicio de Context Broker, responde con un error concreto. + - :return: array de datos cuyos elementos son objeto que representan entidades, según el formato descrito en la sección + "JSON Entity Representation" de la [NGSIv2 API](https://fiware.github.io/specifications/ngsiv2/stable/) + +## Changelog + +0.1.0 (April 26th, 2022) + +- Initial version diff --git a/python-lib/tc_etl_lib/setup.py b/python-lib/tc_etl_lib/setup.py new file mode 100644 index 0000000..0aa00b7 --- /dev/null +++ b/python-lib/tc_etl_lib/setup.py @@ -0,0 +1,56 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# +# Copyright 2022 Telefónica Soluciones de Informática y Comunicaciones de España, S.A.U. +# +# This file is part of tc_etl_lib +# +# tc_etl_lib is free software: you can redistribute it and/or +# modify it under the terms of the GNU Affero General Public License as +# published by the Free Software Foundation, either version 3 of the +# License, or (at your option) any later version. +# +# tc_etl_lib is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero +# General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with IoT orchestrator. If not, see http://www.gnu.org/licenses/. + +import pathlib +from setuptools import find_packages, setup + +HERE = pathlib.Path(__file__).parent + +VERSION = '0.1.0-next' +PACKAGE_NAME = 'tc_etl_lib' +AUTHOR = '' +AUTHOR_EMAIL = '' +URL = '' + +LICENSE = '' #Tipo de licencia +DESCRIPTION = 'Librería común para uso en ETL' # Descripción corta +LONG_DESCRIPTION = (HERE / "README.md").read_text(encoding='utf-8') #Referencia al documento README con una descripción más elaborada +LONG_DESC_TYPE = "text/markdown" + +#Paquetes necesarios para que funcione la librería. Se instalarán a la vez si no lo tuvieras ya instalado +INSTALL_REQUIRES = [ + 'requests==2.21.0', + 'urllib3==1.24.1' +] + +setup( + name=PACKAGE_NAME, + version=VERSION, + description=DESCRIPTION, + long_description=LONG_DESCRIPTION, + long_description_content_type=LONG_DESC_TYPE, + author=AUTHOR, + author_email=AUTHOR_EMAIL, + url=URL, + install_requires=INSTALL_REQUIRES, + license=LICENSE, + packages=find_packages(), + include_package_data=True +) diff --git a/python-lib/tc_etl_lib/tc_etl_lib/__init__.py b/python-lib/tc_etl_lib/tc_etl_lib/__init__.py new file mode 100644 index 0000000..aa1c24d --- /dev/null +++ b/python-lib/tc_etl_lib/tc_etl_lib/__init__.py @@ -0,0 +1,23 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- + +# Copyright 2022 Telefónica Soluciones de Informática y Comunicaciones de España, S.A.U. +# +# This file is part of tc_etl_lib +# +# tc_etl_lib is free software: you can redistribute it and/or +# modify it under the terms of the GNU Affero General Public License as +# published by the Free Software Foundation, either version 3 of the +# License, or (at your option) any later version. +# +# tc_etl_lib is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero +# General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with IoT orchestrator. If not, see http://www.gnu.org/licenses/. +# + +from .auth import * +from .cb import * diff --git a/python-lib/tc_etl_lib/tc_etl_lib/auth.py b/python-lib/tc_etl_lib/tc_etl_lib/auth.py new file mode 100644 index 0000000..c2523de --- /dev/null +++ b/python-lib/tc_etl_lib/tc_etl_lib/auth.py @@ -0,0 +1,176 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# +# Copyright 2022 Telefónica Soluciones de Informática y Comunicaciones de España, S.A.U. +# +# This file is part of tc_etl_lib +# +# tc_etl_lib is free software: you can redistribute it and/or +# modify it under the terms of the GNU Affero General Public License as +# published by the Free Software Foundation, either version 3 of the +# License, or (at your option) any later version. +# +# tc_etl_lib is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero +# General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with IoT orchestrator. If not, see http://www.gnu.org/licenses/. + +""" +Authorization routines for Python: + - authManager.get_auth_token_subservice +""" + +import requests +import logging +from typing import Dict + +logger = logging.getLogger(__name__) + +class authManager: + """Authentication Manager + + endpoint: define service endpoint auth (example: https://:) + user: define user to authenticate + password: define password to authenticate + service: service to authenticate + subservice: subservice to authenticate + tokens: token list stored when athenticate in a subservice + """ + endpoint: str + user: str + password: str + service: str + subservice: str + tokens: Dict[str, str] + + + def __init__(self,*, endpoint: str = None, service: str = None, user: str = None, password: str = None, subservice: str = None) -> None: + + messageError = [] + if (endpoint == None): + messageError.append('<>') + + if (service == None): + messageError.append('<>') + + if (user == None): + messageError.append('<>') + + if (password == None): + messageError.append('<>') + + if len(messageError) != 0: + defineParams = messageError[0] + if len(messageError) != 1: + defineParams = " and ".join([", ".join(messageError[:-1]), messageError[-1]]) + raise ValueError(f'You must define {defineParams} in authManager') + + self.endpoint = endpoint + self.service = service + self.user = user + self.password = password + self.subservice = subservice + self.tokens = {} + + def get_info(self): + """ Show auth info + + only for debug uses + """ + if (hasattr(self,"endpoint")): + logger.info(f'endpoint: {self.endpoint}') + if (hasattr(self,"service")): + logger.info(f'service: {self.service}') + if (hasattr(self,"subservice")): + logger.info(f'service: {self.subservice}') + if (hasattr(self,"user")): + logger.info(f'user: {self.user}') + if (hasattr(self,"password")): + logger.info(f'password: {self.password}') + if (hasattr(self,"tokens")): + for key in self.tokens: + logger.info('tokens[' + key + ']: ' + self.tokens[key]) + + def get_auth_token_subservice(self, *, subservice: str = None): + """Authenticate in a service/subservice and get a token + + :param subservice: define subservice to be authenticated, defaults to None + :raises ValueError: is thrown when some required argument is missing + :raises Exception: is thrown when the response from the auth service indicates an error + :return: the token returned by the auth service + """ + + messageError = [] + if (not hasattr(self,"endpoint")): + messageError.append('<>') + + if (not hasattr(self,"service")): + messageError.append('<>') + + if (not hasattr(self,"user")): + messageError.append('<>') + + if (not hasattr(self,"password")): + messageError.append('<>') + + if len(messageError) != 0: + defineParams = messageError[0] + if len(messageError) != 1: + defineParams = " and ".join([", ".join(messageError[:-1]), messageError[-1]]) + raise ValueError(f'You must define {defineParams} in authManager') + + if (not hasattr(self,"tokens")): + self.tokens = {} + + if (subservice == None): + if (not hasattr(self,"subservice")): + raise ValueError('You must define <> in authManager') + else: + subservice = self.subservice + + headers = { + 'Content-Type': 'application/json', + 'Accept': 'application/json' + } + + body = { + "auth": { + "scope": { + "project": { + "domain": { + "name": self.service + }, + "name": subservice + } + }, + "identity": { + "password": { + "user": { + "domain": { + "name": self.service + }, + "password": self.password, + "name": self.user + } + }, + "methods": [ + "password" + ] + } + } + } + + logger.debug(f'getting auth token (subservice "{subservice}")...') + req_url = self.endpoint + '/v3/auth/tokens' + res = requests.post(req_url, json=body, headers=headers, verify=False) + + if res.status_code != 201: + raise Exception(f'Failed to get auth token (subservice "{subservice}") ({res.status_code}): {res.json()}') + + logger.debug(f'Authentication token for subservice "{subservice}" was created successfully') + token = res.headers['X-Subject-Token'] + self.tokens[subservice] = token + return token diff --git a/python-lib/tc_etl_lib/tc_etl_lib/cb.py b/python-lib/tc_etl_lib/tc_etl_lib/cb.py new file mode 100644 index 0000000..25617e3 --- /dev/null +++ b/python-lib/tc_etl_lib/tc_etl_lib/cb.py @@ -0,0 +1,219 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# +# Copyright 2022 Telefónica Soluciones de Informática y Comunicaciones de España, S.A.U. +# +# This file is part of tc_etl_lib +# +# tc_etl_lib is free software: you can redistribute it and/or +# modify it under the terms of the GNU Affero General Public License as +# published by the Free Software Foundation, either version 3 of the +# License, or (at your option) any later version. +# +# tc_etl_lib is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero +# General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with IoT orchestrator. If not, see http://www.gnu.org/licenses/. + +''' +ContextBroker routines for Python: + - cbManager.send_batch + - cbManager.get_entities_page +''' +import requests +from requests.adapters import HTTPAdapter +from requests.packages.urllib3.util.retry import Retry +from typing import Any, Optional + +import logging +import time + +from . import authManager + + +logger = logging.getLogger(__name__) + +class FetchError(Exception): + """ + FetchError encapsulates all parameters of an HTTP request and the erroneous response + """ + + response: requests.Response + method: str + url: str + params: Optional[Any] = None + headers: Optional[Any] = None + body: Optional[Any] = None + + def __str__(self) -> str: + return f"Failed to {self.method} {self.url} (headers: {self.headers}, params: {self.params}, body: {self.body}): [{self.response.status_code}] {self.response.text}" + + +class cbManager: + """ContextBroker Manager + + endpoint: define service endpoint cb (example: https://:) + timeout: timeout in seconds (default: 10) + post_retry_connect: number of retries (defaul: 3) + post_retry_backoff_factor: retry factor delay -> {backoff factor} * (2 ** ({number of total retries} - 1)) (defaul: 20). (ref. urllib3 docs) (default: False) + sleep_send_batch: sleep X seconds afters send update batch. (default: 0). + cb_flowcontrol: Opción del Context Broker, que permite un mejor rendimiento en caso de envío masivo de datos (batch updates). Este mecanismo, requiere arrancar el Context Broker con un flag concreto y en las peticiones de envío de datos, añadir esa opción. Referencia en Fiware Orion Docs (default: False) + """ + + endpoint: str + timeout: int = 10 + post_retry_connect: int = 3 + post_retry_backoff_factor: int = 20 + sleep_send_batch: int = 0 + cb_flowcontrol: bool = False + + def __init__(self,*, endpoint: str = None, timeout: int = 10, post_retry_connect: int = 3, post_retry_backoff_factor: int = 20, sleep_send_batch: int = 0, cb_flowcontrol: bool = False) -> None: + + if (endpoint == None): + raise ValueError(f'You must define <> in cbManager') + + self.endpoint = endpoint + self.timeout = timeout + self.post_retry_connect = post_retry_connect + self.post_retry_backoff_factor = post_retry_backoff_factor + self.sleep_send_batch = sleep_send_batch + self.cb_flowcontrol = cb_flowcontrol + + def get_entities_page(self, *, subservice: str = None, auth: authManager = None, offset: int = None, limit: int = None, type: str = None, orderBy: str = None): + """Retrieve data from context broker + + :param subservice: Define subservice from which entities are retrieved, defaults to None + :param auth: Define authManager, defaults to None + :param offset: Establishes the offset from where entities are retrieved, defaults to None + :param limit: Limits the number of entities to be retrieved, defaults to None + :param type: Retrieve entities whose type matches one of the elements in the list, defaults to None + :param orderBy: Criteria for ordering results, defaults to None + :raises ValueError: is thrown when some required argument is missing + :raises FetchError: is thrown when the response from the cb indicates an error + :return: json data + """ + if (auth == None): + raise ValueError('You must define a authManager') + + if (not hasattr(auth,"tokens")): + auth.tokens = {} + + if (subservice == None): + if (not hasattr(auth,"subservice")): + raise ValueError('You must define <> in authManager') + else: + subservice = auth.subservice + + if subservice not in auth.tokens.keys(): + auth.get_auth_token_subservice(subservice = subservice) + + headers = { + 'Fiware-Service': auth.service, + 'Fiware-ServicePath': subservice, + 'X-Auth-Token': auth.tokens[subservice] + } + + params = {"offset": offset, "limit": limit, "type": type, "orderBy": orderBy} + req_url = f"{self.endpoint}/v2/entities" + resp = requests.get(req_url, params=params, headers=headers, verify=False, timeout=self.timeout) + + if resp.status_code < 200 or resp.status_code > 204: + raise FetchError(response=resp, method="GET", url=req_url, params=params, headers=headers) + + return resp.json() + + def send_batch(self, *, subservice: str = None, auth: authManager, entities: str) -> bool: + """Send batch data to context broker + + :param auth: Define authManager + :param entities: Entities data + :param subservice: Define subservice to send batch data, defaults to None + :raises ValueError: is thrown when some required argument is missing + :raises Exception: is thrown when the cotext broker response isn't ok operation + :return: True if the operation is correct + """ + + if (auth == None): + raise ValueError('You must define a authManager') + + if (not hasattr(auth,"tokens")): + auth.tokens = {} + + if (subservice == None): + if (not hasattr(auth,"subservice")): + raise ValueError('You must define <> in authManager') + else: + subservice = auth.subservice + + if subservice not in auth.tokens.keys(): + auth.get_auth_token_subservice(subservice = subservice) + + res = self.__batch_creation_update(auth=auth, subservice = subservice, entities=entities) + if res.status_code == 401: + auth.get_auth_token_subservice(subservice = subservice) + res = self.__batch_creation_update(auth=auth, subservice = subservice, entities=entities) + + if res.status_code != 204: + raise Exception(f'Error in batch operation ({res.status_code}): {res.json()}') + + logger.debug(f'- Update batch of {len(entities)} entities') + + if (self.sleep_send_batch != 0): + time.sleep(self.sleep_send_batch) + + return True + + def __batch_creation_update(self, *, subservice: str = None, auth: authManager = None, entities: str): + """Send batch data to Context Broker + + :param entities: Entities data + :param subservice: Define subservice to send batch data, defaults to None + :param auth: Define authManager, defaults to None + :raises ValueError: is thrown when some required argument is missing + :return: Http response code + """ + if (auth == None): + raise ValueError('You must define a authManager') + + if (subservice == None): + if (not hasattr(auth,"subservice")): + raise ValueError('You must define <> in authManager') + else: + subservice = auth.subservice + + if (not hasattr(self,"endpoint")): + raise ValueError('You must define <> in cbManager') + + headers = { + 'Fiware-Service': auth.service, + 'Fiware-ServicePath': subservice, + 'X-Auth-Token': auth.tokens[subservice], + 'Content-Type': 'application/json' + } + + body = { + 'actionType': 'append', + 'entities': entities + } + + if (self.cb_flowcontrol): + req_url = f'{self.endpoint}/v2/op/update?options=flowControl' + else: + req_url = f'{self.endpoint}/v2/op/update' + + http = requests.Session() + retry_strategy = Retry( + total=self.post_retry_connect, + read=self.post_retry_connect, + backoff_factor=self.post_retry_backoff_factor, + status_forcelist=(429, 500, 502, 503, 504), + method_whitelist=('HEAD', 'GET', 'OPTIONS', 'POST') + ) + + adapter = HTTPAdapter(max_retries=retry_strategy) + http.mount('http://', adapter) + http.mount('https://', adapter) + return http.post(req_url, json=body, headers=headers, verify=False, timeout=self.timeout) diff --git a/python-lib/test-tc_etl_lib.py b/python-lib/test-tc_etl_lib.py new file mode 100644 index 0000000..f5cb481 --- /dev/null +++ b/python-lib/test-tc_etl_lib.py @@ -0,0 +1,91 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# +# Copyright 2022 Telefónica Soluciones de Informática y Comunicaciones de España, S.A.U. +# +# This file is part of tc_etl_lib +# +# tc_etl_lib is free software: you can redistribute it and/or +# modify it under the terms of the GNU Affero General Public License as +# published by the Free Software Foundation, either version 3 of the +# License, or (at your option) any later version. +# +# tc_etl_lib is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero +# General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with IoT orchestrator. If not, see http://www.gnu.org/licenses/. + +import logging + +import tc_etl_lib as tc + +# Sets the logging configuration +logging.basicConfig( + level=logging.DEBUG, + format="time=%(asctime)s | lvl=%(levelname)s | comp=%(name)s | op=%(filename)s[%(lineno)d]:%(funcName)s | msg=%(message)s", + handlers=[ + logging.StreamHandler() + ] +) +logger = logging.getLogger() + +# declare authManager +auth: tc.auth.authManager = tc.auth.authManager(endpoint='http://:', + service = 'alcobendas', + user = '', + password = '') + +# test get auth token with manager +try: + #auth.get_auth_token_subservice() + token = auth.get_auth_token_subservice(subservice = '/energia') + logger.info(f'token energia: {token}') + token = auth.get_auth_token_subservice(subservice = '/activos') + logger.info(f'token activos: {token}') + pass +except Exception as err: + logger.error('get_auth_token_subservice problems!!') + logger.error(err) + +# show info about authManager + +auth.get_info() + +# get entities +cbm: tc.cb.cbManager = tc.cb.cbManager(endpoint = 'http://:') +try : + entities = [ + { + "id": "myEntity15", + "type": "myType", + "description": { + "value": "My happy entity", + "type": "Text" + }, + "online": { + "value": 'true', + "type": "Boolean" + }, + "temperature": { + "value": '42.3', + "type": "Number" + } + } + ] + + cbm.send_batch(auth=auth, subservice='/energia', entities=entities) + json = cbm.get_entities_page(subservice='/energia', auth=auth, type='myType') + for i, item in enumerate(json): + logger.info(f'[{i}]--> {item["id"]} ({item["type"]})') + + json = cbm.get_entities_page(auth=auth, subservice='/activos', offset = 0, limit = 3, orderBy='id') + for i, item in enumerate(json): + logger.info(f'[{i}]--> {item["id"]} ({item["type"]})') + + +except Exception as err: + logger.error(err) +