docs/drools/drools.rst

.. This work is licensed under a Creative Commons Attribution 4.0 International License.

.. _drools-label:

Policy Drools PDP Engine
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.. contents::
    :depth: 1

The Drools PDP, aka PDP-D, is the PDP in the Policy Framework that uses the
`Drools BRMS <https://www.drools.org/>`__ to enforce policies.

The PDP-D functionality has been partitioned into two functional areas:

- PDP-D Engine.
- PDP-D Applications.

**PDP-D Engine**

The PDP-D Engine is the infrastructure that *policy applications* use.
It provides networking services, resource grouping, and diagnostics.

The PDP-D Engine supports the following Tosca Native Policy Types:

- onap.policies.native.Drools
- onap.policies.native.drools.Controller

These types are used to dynamically add and configure new application controllers.

The PDP-D Engine hosts applications by means of *controllers*.
*Controllers* may support other Tosca Policy Types.   The
types supported by the *Control Loop* applications are:

- onap.policies.controlloop.operational.common.Drools
- onap.policies.controlloop.Operational


**PDP-D Applications**

A PDP-D application, ie. a *controller*, contains references to the
resources that the application needs.   These include networked endpoint references,
and maven coordinates.

*Control Loop* applications are used in ONAP to enforce operational policies.


The following guides offer more information in these two functional areas.

.. toctree::
   :maxdepth: 2

   pdpdEngine.rst
   pdpdApps.rst