nldcsc 0.2.45

Package with general devops code

NLDCSC package

This package contains generic re-usable code.

Install the full package:

pip install nldcsc[all]

Package has several modules which can be installed separately by specifying them as an extra requirement. To install the loggers module only, specify:

pip install nldcsc[loggers]

Or for multiple modules:

pip install nldcsc[loggers, flask_managers]

Modules

The following modules are available in the nldcsc package:

• auth
• datatables
• flask_managers
• flask_middleware
• flask_plugins
• http_apis
• loggers
• sql_migrations

Loggers

There are two loggers provided:

• AppLogger (nldcsc.loggers.app_logger.AppLogger)
• GunicornLogger (nldcsc.loggers.app_logger.GunicornLogger)

The AppLogger is intended to be used as a loggerClass to be used for the standard python logging module.

import logging
from nldcsc.loggers.app_logger import AppLogger

logging.setLoggerClass(AppLogger)

mylogger = logging.getLogger(__name__)

The 'mylogger' instance has all the proper formatting and handlers (according to the desired config) to log messages.

The Gunicorn logger is intended to be used for as a loggerClass for the gunicorn webserver; it enables the FlaskAppManager to set the necessary formatting and handles according to the AppLogger specs and a custom format for the gunicorn access logging.

Flask app manager

The FlaskAppManager is intended to be used to 'run' flask applications in both test, development as in production environments.

from YADA import app
from nldcsc.flask_managers.flask_app_manager import FlaskAppManager

fam = FlaskAppManager(version="1.0", app=app)
fam.run()

Depending on the configuration the FlaskAppManager uses a werkzeug (DEBUG == True) or a gunicorn webserver. TLS could be set for both webservers iaw the module specific README.md.

HTTP apis

Baseclass for http api communication is present under nldcsc.http_apis.base_class.api_base_class.ApiBaseClass

SQL Migrations

The sql migrations can be used to facilitate migration between different versions of sql models / versions. It relies on flask migrate to perform the different migrations. It has a CLI as well as an python class based API.

Check the command line help

python3 -m nldcsc.sql_migrations.flask_sql_migrate -a /path/to/script_with_flask_app.py -i
python3 -m nldcsc.sql_migrations.flask_sql_migrate -a /path/to/script_with_flask_app.py -m
python3 -m nldcsc.sql_migrations.flask_sql_migrate -a /path/to/script_with_flask_app.py -u

Or initiate the FlaskSqlMigrate as a class and initiate the migration process from there:

from nldcsc.sql_migrations.flask_sql_migrate import FlaskSqlMigrate
fsm = FlaskSqlMigrate(app_ref="/path/to/script_with_flask_app.py")

fsm.db_init()
fsm.db_migrate()
fsm.db_update()