.. toctree::
:maxdepth: 2
-The ONAP XACML Policy PDP Engine uses an `open source implementation <https://github.com/att/XACML>`__ of the `OASIS XACML 3.0 Standard <https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=xacml>`__ to support fine-grained policy decisions in the ONAP. The XACML 3.0 Standard is a language for both policies and requests/responses for access control decisions. The ONAP XACML PDP translates TOSCA Compliant Policies into the XACML policy language, loads the policies into the XACML engine and exposes a Decision API which uses the XACML request/response language to render decisions for ONAP components.
+The ONAP XACML Policy PDP Engine uses an `open source implementation <https://github.com/att/xacml-3.0>`__ of the `OASIS XACML 3.0 Standard <https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=xacml>`__ to support fine-grained policy decisions in the ONAP. The XACML 3.0 Standard is a language for both policies and requests/responses for access control decisions. The ONAP XACML PDP translates TOSCA Compliant Policies into the XACML policy language, loads the policies into the XACML engine and exposes a Decision API which uses the XACML request/response language to render decisions for ONAP components.
ONAP XACML PDP Supported Policy Types
*************************************
`Implementation of Coordination Translator <https://github.com/onap/policy-xacml-pdp/blob/master/applications/guard/src/main/java/org/onap/policy/xacml/pdp/application/guard/CoordinationGuardTranslator.java>`_
Native XACML OAISIS 3.0 XML Policy Translator
------------------------------------------------
+---------------------------------------------
This translator pulls a URL encoded XML XACML policy from a TOSCA Policy and loads it into a XACML Engine. This allows native XACML policies to be used to support complex use cases in which a translation from TOSCA to XACML is too difficult.
.. literalinclude:: decision.match.response.json
:language: JSON
+Overriding or Extending the ONAP XACML PDP Supported Policy Types
+*****************************************************************
+
+It is possible to extend or replace one or more of the existing ONAP application implementations with your own. Since the XACML application loader uses the java.util.Service class to search the classpath to find and load applications, it may be necessary via the configuration file to exclude the ONAP packaged applications in order for your custom application to be loaded. This can be done via the configuration file by adding an **exclusions** property with a list of the Java class names you wish to exclude.
+
+`A configuration file example is located here <https://github.com/onap/policy-xacml-pdp/blob/7711185bb36b387e3596653ca170262f919ff474/main/src/test/resources/parameters/XacmlPdpConfigParameters_Exclusions.json#L19>`_
+
+A coding example is available in the JUnit test for the Application Manager called `testXacmlPdpApplicationManagerSimple <https://github.com/onap/policy-xacml-pdp/blob/7711185bb36b387e3596653ca170262f919ff474/main/src/test/java/org/onap/policy/pdpx/main/rest/XacmlPdpApplicationManagerTest.java#L143>`_. This example demonstrates how to exclude the Match and Guard applications while verifying a custom `TestGuardOverrideApplication <https://github.com/onap/policy-xacml-pdp/blob/master/main/src/test/java/org/onap/policy/pdpx/main/rest/TestGuardOverrideApplication.java>`_ class is loaded and associated with the **guard** action. Thus, replacing and extending the guard application.
+
+Note that this XACML PDP feature is exclusive to the XACML PDP and is secondary to the ability of the PAP to group PDP's and declare which Policy Types are supported by a PDP group. For example, even if a PDP group excludes a Policy Type for a XACML PDP, this simply prevents policies being deployed to that group using the PAP Deployment API. If there is no **exclusions** in the configuration file, then any application will be loaded that it is in the classpath. If needed, one could use both PDP group Policy Type supported feature **and** the exclusions configuration to completely restrict which Policy Types as well as which applications are loaded at runtime.
+
+For more information on PDP groups and setting supported Policy Types, please refer to the :ref:`PAP Documentation <pap-label>`
+
Supporting Your Own Policy Types and Translators
************************************************
ToscaPolicyTranslator
=====================
-Your custom **XacmlApplicationServiceProvider** must provide an implementation of a *ToscaPolicyTranslator*.
+Your custom **XacmlApplicationServiceProvider** must provide an implementation of a **ToscaPolicyTranslator**.
`Interface for ToscaPolicyTranslator <https://github.com/onap/policy-xacml-pdp/blob/master/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyTranslator.java>`_
-See each of the ONAP Policy type application implementations which each have their own *ToscaPolicyTranslator*. Most use or extend the **StdBaseTranslator**.
+See each of the ONAP Policy type application implementations which each have their own *ToscaPolicyTranslator*. Most use or extend the **StdBaseTranslator** which contain methods that applications can use to support XACML obligations, advice as well as return attributes to the calling client applications via the **DecisionResponse**.
-`Standard Tosca Policy Translator implementation <https://github.com/onap/policy-xacml-pdp/blob/master/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdBaseTranslator.java>`.
+`Standard Tosca Policy Translator implementation <https://github.com/onap/policy-xacml-pdp/blob/master/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdBaseTranslator.java>`_.
XACML Application and Enforcement Tutorials
===========================================
-The following tutorials can be helpful to get started on building your own decision application as well as building enforcement into your application.
+The following tutorials can be helpful to get started on building your own decision application as well as building enforcement into your application. They also show how to build and extend both the **XacmlApplicationServiceProvider** and **ToscaPolicyTranslator** classes.
.. toctree::
:maxdepth: 1
Code Review / policy / parent.git / blobdiff