eventzAPI

eventzAPI

The eventzAPI supports a Python micro services infrastructure. It employs publish and subscribe messaging using AMQP messaging (RabbitMQ) & Event Sourcing. It provides support for Qt,tkinter or wxPython GUIs. A Librarian Client supports querying an indelible event store (Archive).

The API requires that a RabbitMQ server be accessible and if a master archive is needed, an Archivist and Librarian available through Docker Hub.

To use eventzAPI in an application example code follows:

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from eventzAPI import ApplicationInitializer . . Class Main(object): def initialize_eventz(self):

    subscriptions = [< A list of event record types that the application subscribes to eg. [250001.00", "250002.00"]>]
    publications = [< A list of event record types that the application publishes eg. [250011.00", "250022.00"]>]
    application_id = < A UUID unique to this application eg.'65aa1c62-0991-48b7-a52c-1140c73582ce'>
    application_name = 'Your application name'
    user_id = 'Your user name if there is one, otherwise an empty string (Needed for ApplicationInitializer)'

# Instantiate the Application Initializer that will generate the objects needed to access the API's methods
    ai = ApplicationInitializer(subscriptions, publications, application_id, application_name, self.settings_path,
                                user_id)
# Get the objects
    self.a_publisher, self.a_subscriber, self.a_logger, self.a_librarian_client, self.eventz_utilities, self.parameters = ai.initialize()
# The initializer generates a session Id (UUID_) which is included in an event record metadata. Useful in separating events messages 
# Meant for your instance of the application
    self.my_session_id = str(self.parameters.session_id)

# Inform the universe that this application instance has started.
    eventz_utilities.start_application(self.a_publisher, user_id)
    pass

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