ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/rest/service/MetricService.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP-PAP-REST
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20 package org.onap.policy.pap.xacml.rest.service;
  21
  22 import java.util.HashSet;
  23 import java.util.Set;
  24
  25 import javax.persistence.EntityManager;
  26 import javax.servlet.http.HttpServletResponse;
  27
  28 import org.json.JSONObject;
  29 import org.onap.policy.common.logging.eelf.MessageCodes;
  30 import org.onap.policy.common.logging.eelf.PolicyLogger;
  31 import org.onap.policy.pap.xacml.rest.XACMLPapServlet;
  32 import org.onap.policy.xacml.api.XACMLErrorConstants;
  33 import org.onap.policy.xacml.api.pap.OnapPDPGroup;
  34
  35 import com.att.research.xacml.api.pap.PDPPolicy;
  36
  37 public class MetricService {
  38         private static String errorMsg  = "error";
  39         /*
  40          * This is a private constructor
  41          * */
  42         private MetricService(){
  43
  44         }
  45         public static void doGetPolicyMetrics(HttpServletResponse response) {
  46                 Set<OnapPDPGroup> groups = new HashSet<>();
  47                 try {
  48                         //get the count of policies on the PDP
  49                         if(XACMLPapServlet.getPAPEngine()!=null){
  50                                 groups = XACMLPapServlet.getPAPEngine().getOnapPDPGroups();
  51                         }
  52                         int pdpCount = 0;
  53                         for (OnapPDPGroup group : groups) {
  54                                 Set<PDPPolicy> policies = group.getPolicies();
  55                                 pdpCount += policies.size();
  56                         }
  57                         //get the count of policies on the PAP
  58                         EntityManager em = null;
  59                         if(XACMLPapServlet.getEmf()!=null){
  60                                 em = XACMLPapServlet.getEmf().createEntityManager();
  61                         }
  62                         if (em==null){
  63                                 PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " Error creating entity manager with persistence unit: " + XACMLPapServlet.getPersistenceUnit());
  64                                 response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
  65                                 response.addHeader(errorMsg, "Error creating entity manager with persistence unit");
  66                                 return;
  67                         }
  68                         int papCount = ((Number) em.createNamedQuery("PolicyVersion.findAllCount").getSingleResult()).intValue();
  69                         em.close();
  70                         int totalCount = pdpCount + papCount;
  71                         //create json string for API response
  72                         JSONObject json = new JSONObject();
  73                         json.put("papCount", papCount);
  74                         json.put("pdpCount", pdpCount);
  75                         json.put("totalCount", totalCount);
  76                         if (pdpCount>0 && papCount>0 && totalCount>0) {
  77                                 PolicyLogger.info("Metrics have been found on the Policy Engine for the number of policies on the PAP and PDP.");
  78                                 response.setStatus(HttpServletResponse.SC_OK);
  79                                 response.addHeader("successMapKey", "success");
  80                                 response.addHeader("operation", "getMetrics");
  81                                 response.addHeader("metrics", json.toString() );
  82                                 return;
  83                         }else{
  84                                 String message = "The policy count on the PAP and PDP is 0.  Please check the database and file system to correct this error.";
  85                                 response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
  86                                 response.addHeader(errorMsg, message);
  87                                 return;
  88                         }
  89                 } catch (Exception e) {
  90                         String message = XACMLErrorConstants.ERROR_DATA_ISSUE + " Error Querying the Database: " + e.getMessage();
  91                         PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE, e, "XACMLPapServlet", " Error Querying the Database.");
  92                         response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
  93                         response.addHeader(errorMsg, message);
  94                         return;
  95                 }
  96         }
  97
  98 }