The Application Controller, APPC (sometimes called APP-C) API enables you to manage and control manages and controls the life cycle of controlled virtual applications, such as virtual network functions (VNFs), and their components. APPC receives commands from external OpenECOMP components, such as MSO, DCAE, or the Portal, to manage the life cycle of virtual applications and their components.
A virtual application is composed of the following layers of network technology:
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For example, a Terminate command applies to all four layers, whereas a Scale command may not apply to the VM layer.
An An LCM command is sent as a request to the APP-C using an HTTP POST request, or in a message on OpenECOMP's bus (UEB/DMaaP). For each request, the APPC returns one or more responses:
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- A synchronous command, such as Lock or Unlock, results in a single response that is either SUCCESS or ERROR.
For more information about the APPC API, see the <<DocRef: OpenECOMP Application Controller (APP-C) API Guide>>Guide.