context-goodies 0.1

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context-goodies

Helper functions to maintain process/thread/coroutine local data in trusted microservices.

Install

pip install context-goodies

You can also "vendor" the module by copying context_goodies.py to your project. There are no pypi dependencies.

Request ID

Call set_current_request_id to set a new request id. If using Django, add context_goodies.context_middleware to MIDDLEWARES to maintain request ids automatically. Note it assumes an internal microservice API and trusted clients.

Logging context

Call update_logging_context to add new data to every log line, eg. update_logging_context(user_id=user_id).

Logging config example

Filter and formatter to log context data added with update_logging_context:

'filters': {
    'extra': {'()': 'context_goodies.ExtraDataFilter'},
},
'formatters': {'verbose': {'format': '[%(name)s][%(levelname)s] %(message)s%(extra)s'}},
'handlers': {
    'console': {
        'level': 'DEBUG',
        'class': 'logging.StreamHandler',
        'formatter': 'verbose',
        'filters': ['extra'],
    },
},

Greenlet handling

Django middleware automatically groups all greenlets spawned during request lifetime and kills the entire group in the request finalizer to avoid memory leaks.