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The Application Controller (APPC, formerly abbreviated APP-C) manages and controls the life cycle of virtual applications, such as virtual network functions (VNFs), and their components.  APP-C  APPC receives commands from external OpenECOMP internal ONAP components, such as MSOSO, DCAE, or the Portal.

A virtual application is composed of the following layers of network technology:

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An LCM command is sent as a request to the APP-C APPC using an HTTP POST request, or in a message on OpenECOMP's bus (DMaaP). For each request, the APP-C APPC returns one or more responses:

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For more information, see the OpenECOMP Application Controller (APP-C) API Guide.the APPC Documentation Repository