0f970f7e393b236db7d8333e9b3e4c243c0af290
[policy/xacml-pdp.git] / applications / common / src / main / java / org / onap / policy / pdp / xacml / application / common / operationshistory / GetOperationOutcomePip.java
1 /*-
2  * ============LICENSE_START=======================================================
3  * Copyright (C) 2019-2020 AT&T Intellectual Property. All rights reserved.
4  * ================================================================================
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *      http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
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
15  * limitations under the License.
16  * ============LICENSE_END=========================================================
17  */
18
19 package org.onap.policy.pdp.xacml.application.common.operationshistory;
20
21 import com.att.research.xacml.api.XACML3;
22 import com.att.research.xacml.api.pip.PIPException;
23 import com.att.research.xacml.api.pip.PIPFinder;
24 import com.att.research.xacml.api.pip.PIPRequest;
25 import com.att.research.xacml.api.pip.PIPResponse;
26 import com.att.research.xacml.std.pip.StdMutablePIPResponse;
27 import com.att.research.xacml.std.pip.StdPIPResponse;
28 import com.google.common.base.Strings;
29 import java.util.Arrays;
30 import java.util.Collection;
31 import javax.persistence.NoResultException;
32 import org.onap.policy.pdp.xacml.application.common.ToscaDictionary;
33 import org.onap.policy.pdp.xacml.application.common.std.StdOnapPip;
34 import org.slf4j.Logger;
35 import org.slf4j.LoggerFactory;
36
37
38 public class GetOperationOutcomePip extends StdOnapPip {
39     public static final String ISSUER_NAME = "get-operation-outcome";
40     private static Logger logger = LoggerFactory.getLogger(GetOperationOutcomePip.class);
41
42     public GetOperationOutcomePip() {
43         super();
44         this.issuer = ISSUER_NAME;
45     }
46
47     @Override
48     public Collection<PIPRequest> attributesRequired() {
49         return Arrays.asList(PIP_REQUEST_TARGET);
50     }
51
52     /**
53      * getAttributes.
54      *
55      * @param pipRequest the request
56      * @param pipFinder the pip finder
57      * @return PIPResponse
58      */
59     @Override
60     public PIPResponse getAttributes(PIPRequest pipRequest, PIPFinder pipFinder) throws PIPException {
61         logger.debug("getAttributes requesting attribute {} of type {} for issuer {}",
62                 pipRequest.getAttributeId(), pipRequest.getDataTypeId(), pipRequest.getIssuer());
63         //
64         // Determine if the issuer is correct
65         //
66         if (Strings.isNullOrEmpty(pipRequest.getIssuer())) {
67             logger.error("issuer is null - returning empty response");
68             //
69             // We only respond to ourself as the issuer
70             //
71             return StdPIPResponse.PIP_RESPONSE_EMPTY;
72         }
73         if (! pipRequest.getIssuer().startsWith(ToscaDictionary.GUARD_ISSUER_PREFIX)) {
74             logger.error("Issuer does not start with guard");
75             //
76             // We only respond to ourself as the issuer
77             //
78             return StdPIPResponse.PIP_RESPONSE_EMPTY;
79         }
80         //
81         // Parse out the issuer which denotes the time window
82         // Eg: any-prefix:clname:some-controlloop-name
83         //
84         String[] s1 = pipRequest.getIssuer().split("clname:");
85         String clname = s1[1];
86         String target = null;
87         target = getAttribute(pipFinder, PIP_REQUEST_TARGET);
88
89         logger.debug("Going to query DB about: clname={}, target={}", clname, target);
90         String outcome = doDatabaseQuery(clname, target);
91         logger.debug("Query result is: {}", outcome);
92
93         StdMutablePIPResponse pipResponse = new StdMutablePIPResponse();
94         this.addStringAttribute(pipResponse,
95                 XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE,
96                 ToscaDictionary.ID_RESOURCE_GUARD_OPERATIONOUTCOME,
97                 outcome,
98                 pipRequest);
99         return new StdPIPResponse(pipResponse);
100     }
101
102     private String doDatabaseQuery(String clname, String target) {
103         logger.info("Querying operations history for {} {}", clname, target);
104         //
105         // Only can query if we have an EntityManager
106         //
107         if (em == null) {
108             logger.error("No EntityManager available");
109             return null;
110         }
111         //
112         // Do the query
113         //
114         try {
115             //
116             // We are expecting a single result
117             //
118             return em.createQuery("select e.outcome from Dbao e"
119                                   + " where e.closedLoopName= ?1"
120                                   + " and e.target= ?2"
121                                   + " order by e.endtime desc",
122                                   String.class)
123                 .setParameter(1, clname)
124                 .setParameter(2, target)
125                 .setMaxResults(1)
126                 .getSingleResult();
127         } catch (NoResultException e) {
128             logger.trace("No results", e);
129         } catch (Exception e) {
130             logger.error("Typed query failed", e);
131         }
132         return null;
133     }
134 }