Refactor xacml-pdp to remove various statics
[policy/xacml-pdp.git] / main / src / main / java / org / onap / policy / pdpx / main / rest / provider / DecisionProvider.java
1 /*-
2  * ============LICENSE_START=======================================================
3  * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
4  * ================================================================================
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9  *      http://www.apache.org/licenses/LICENSE-2.0
10  *
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12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
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16  *
17  * SPDX-License-Identifier: Apache-2.0
18  * ============LICENSE_END=========================================================
19  */
20
21 package org.onap.policy.pdpx.main.rest.provider;
22
23 import com.att.research.xacml.api.Response;
24 import com.att.research.xacml.api.Result;
25
26 import org.apache.commons.lang3.tuple.Pair;
27 import org.onap.policy.models.decisions.concepts.DecisionException;
28 import org.onap.policy.models.decisions.concepts.DecisionRequest;
29 import org.onap.policy.models.decisions.concepts.DecisionResponse;
30 import org.onap.policy.pdp.xacml.application.common.XacmlApplicationServiceProvider;
31 import org.onap.policy.pdpx.main.rest.XacmlPdpApplicationManager;
32 import org.onap.policy.pdpx.main.rest.XacmlPdpStatisticsManager;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
35
36
37 public class DecisionProvider {
38     private static final Logger LOGGER = LoggerFactory.getLogger(DecisionProvider.class);
39
40     /**
41      * Retrieves the policy decision for the specified parameters.
42      * @param body
43      *
44      * @return the Decision object
45      */
46     public DecisionResponse fetchDecision(DecisionRequest request) {
47         LOGGER.debug("Fetching decision {}", request);
48         //
49         // Find application for this decision
50         //
51         XacmlApplicationServiceProvider application = findApplication(request);
52         //
53         // Found application for action
54         //
55         Pair<DecisionResponse, Response> decision;
56         try {
57             decision = application.makeDecision(request);
58         } catch (Exception e) {
59             LOGGER.error("makeDecision failed", e);
60             throw e;
61         }
62         //
63         // Calculate statistics
64         //
65         this.calculateStatistic(decision.getValue());
66         //
67         // Return the decision
68         //
69         return decision.getKey();
70     }
71
72     private XacmlApplicationServiceProvider findApplication(DecisionRequest request) {
73         XacmlApplicationServiceProvider application = XacmlPdpApplicationManager.getCurrent().findApplication(request);
74         if (application != null) {
75             return application;
76         }
77         throw new DecisionException(javax.ws.rs.core.Response.Status.BAD_REQUEST,
78                 "No application for action " + request.getAction());
79     }
80
81     private void calculateStatistic(Response xacmlResponse) {
82
83         for (Result result : xacmlResponse.getResults()) {
84             switch (result.getDecision()) {
85                 case PERMIT:
86                     XacmlPdpStatisticsManager.getCurrent().updatePermitDecisionsCount();
87                     break;
88
89                 case DENY:
90                     XacmlPdpStatisticsManager.getCurrent().updateDenyDecisionsCount();
91                     break;
92
93                 case INDETERMINATE:
94                 case INDETERMINATE_DENY:
95                 case INDETERMINATE_DENYPERMIT:
96                 case INDETERMINATE_PERMIT:
97                     XacmlPdpStatisticsManager.getCurrent().updateIndeterminantDecisionsCount();
98                     break;
99
100                 case NOTAPPLICABLE:
101                     XacmlPdpStatisticsManager.getCurrent().updateNotApplicableDecisionsCount();
102                     break;
103
104                 default:
105                     break;
106
107             }
108         }
109     }
110
111 }