ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/rest/controller/PushPolicyController.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP-PAP-REST
   4  * ================================================================================
   5  * Copyright (C) 2017-2018 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.controller;
  21
  22 import java.io.BufferedWriter;
  23 import java.io.File;
  24 import java.io.FileWriter;
  25 import java.io.IOException;
  26 import java.io.ObjectOutputStream;
  27 import java.net.URI;
  28 import java.util.List;
  29 import java.util.UUID;
  30
  31 import javax.persistence.EntityManager;
  32 import javax.persistence.Query;
  33 import javax.servlet.http.HttpServletRequest;
  34 import javax.servlet.http.HttpServletResponse;
  35
  36 import org.onap.policy.common.logging.eelf.MessageCodes;
  37 import org.onap.policy.common.logging.eelf.PolicyLogger;
  38 import org.onap.policy.common.logging.flexlogger.FlexLogger;
  39 import org.onap.policy.common.logging.flexlogger.Logger;
  40 import org.onap.policy.pap.xacml.rest.XACMLPapServlet;
  41 import org.onap.policy.rest.dao.CommonClassDao;
  42 import org.onap.policy.rest.jpa.PolicyEntity;
  43 import org.onap.policy.rest.jpa.PolicyVersion;
  44 import org.onap.policy.xacml.std.pap.StdPDPGroup;
  45 import org.onap.policy.xacml.std.pap.StdPDPPolicy;
  46 import org.springframework.beans.factory.annotation.Autowired;
  47 import org.springframework.stereotype.Controller;
  48 import org.springframework.web.bind.annotation.RequestMapping;
  49 import org.springframework.web.bind.annotation.RequestMethod;
  50
  51 import com.att.research.xacml.api.pap.PAPException;
  52 import com.fasterxml.jackson.databind.DeserializationFeature;
  53 import com.fasterxml.jackson.databind.JsonNode;
  54 import com.fasterxml.jackson.databind.ObjectMapper;
  55
  56 @Controller
  57 public class PushPolicyController {
  58     private static final Logger LOGGER  = FlexLogger.getLogger(PushPolicyController.class);
  59
  60     private static CommonClassDao commonClassDao;
  61     private static String policyNames = "policyName";
  62     private static String errorMsg      = "error";
  63     private static String operation = "operation";
  64     private static String messageContent = "message";
  65
  66     private static final String REGEX = "[0-9a-zA-Z._ ]*";
  67
  68     @Autowired
  69     public PushPolicyController(CommonClassDao commonClassDao){
  70         PushPolicyController.commonClassDao = commonClassDao;
  71     }
  72
  73     public void setCommonClassDao(CommonClassDao commonClassDao){
  74         PushPolicyController.commonClassDao = commonClassDao;
  75     }
  76     /*
  77      * This is an empty constructor
  78      */
  79     public PushPolicyController(){}
  80
  81     @RequestMapping(value="/pushPolicy", method=RequestMethod.POST)
  82     public void pushPolicy(HttpServletRequest request, HttpServletResponse response){
  83         ObjectMapper mapper = new ObjectMapper();
  84         mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
  85         try {
  86             JsonNode root = mapper.readTree(request.getInputStream());
  87             String policyScope = root.get("policyScope").asText();
  88             String filePrefix = root.get("filePrefix").asText();
  89             String policyName = root.get(policyNames).asText();
  90             String pdpGroup = root.get("pdpGroup").asText();
  91             String requestID = request.getHeader("X-ECOMP-RequestID");
  92             if(requestID==null){
  93                 requestID = UUID.randomUUID().toString();
  94                 LOGGER.info("No request ID provided, sending generated ID: " + requestID);
  95             }
  96             LOGGER.info("Push policy Request to get the selectedPolicy : " + root.asText());
  97             String policyVersionName = policyScope.replace(".", File.separator) + File.separator
  98                     + filePrefix + policyName;
  99             List<?> policyVersionObject = commonClassDao.getDataById(PolicyVersion.class, policyNames, policyVersionName);
 100             if(policyVersionObject!=null){
 101                 PolicyVersion policyVersion = (PolicyVersion) policyVersionObject.get(0);
 102                 String policyID = policyVersionName.replace(File.separator, "."); // This is before adding version.
 103                 policyVersionName += "." + policyVersion.getActiveVersion() + ".xml";
 104                 addPolicyToGroup(policyScope, policyID, policyVersionName.replace(File.separator, "."), pdpGroup, response);
 105             }else{
 106                 String message = "Unknown Policy '" + policyName + "'";
 107                 PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " " + message);
 108                 response.addHeader(errorMsg, "unknownPolicy");
 109                 response.addHeader(operation, "push");
 110                 response.addHeader(messageContent, message);
 111                 response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 112                 return;
 113             }
 114         } catch (NullPointerException | IOException e) {
 115             LOGGER.error(e);
 116             response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 117             response.addHeader(errorMsg, "unknown");
 118             response.addHeader(operation, "push");
 119             return;
 120         }
 121     }
 122
 123     private void addPolicyToGroup(String policyScope, String policyID, String policyName, String pdpGroup, HttpServletResponse response) {
 124         StdPDPGroup selectedPDPGroup = null;
 125         StdPDPPolicy selectedPolicy = null;
 126         //Get the selected PDP Group to push the policy
 127         try {
 128             selectedPDPGroup = (StdPDPGroup) XACMLPapServlet.getPAPEngine().getGroup(pdpGroup);
 129         } catch (PAPException e1) {
 130             PolicyLogger.error(e1);
 131         }
 132         if(selectedPDPGroup==null){
 133             String message = "Unknown groupId '" + selectedPDPGroup + "'";
 134             if(!message.matches(REGEX) ){
 135                 message = "Unknown groupId";
 136             }
 137             PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " " + message);
 138             response.addHeader(errorMsg, "unknownGroupId");
 139             response.addHeader(operation, "push");
 140             response.addHeader(messageContent, message);
 141             response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 142             return;
 143         }
 144         //Get PolicyEntity from DB;
 145         EntityManager em = XACMLPapServlet.getEmf().createEntityManager();
 146         Query createPolicyQuery = em.createQuery("SELECT p FROM PolicyEntity p WHERE p.scope=:scope AND p.policyName=:policyName");
 147         createPolicyQuery.setParameter("scope", policyScope);
 148         createPolicyQuery.setParameter(policyNames, policyName.substring(policyScope.length()+1));
 149         List<?> createPolicyQueryList = createPolicyQuery.getResultList();
 150         PolicyEntity policyEntity = null;
 151         if(!createPolicyQueryList.isEmpty()){
 152             policyEntity = (PolicyEntity)createPolicyQueryList.get(0);
 153         }else{
 154             PolicyLogger.error("Somehow, more than one policy with the same scope, name, and deleted status were found in the database");
 155             String message = "Unknown Policy '" + policyName + "'";
 156             PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " " + message);
 157             response.addHeader(errorMsg, "unknownPolicy");
 158             response.addHeader(operation, "push");
 159             response.addHeader(messageContent, message);
 160             response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 161             return;
 162         }
 163         File temp = new File(policyName);
 164         try (BufferedWriter bw = new BufferedWriter(new FileWriter(temp))){
 165             bw.write(policyEntity.getPolicyData());
 166             URI selectedURI = temp.toURI();
 167             // Create the policy Object
 168             selectedPolicy = new StdPDPPolicy(policyName, true, policyID, selectedURI);
 169         } catch (IOException e) {
 170             LOGGER.error("Unable to get policy '" + policyName + "': "+ e.getMessage(),e);
 171         }
 172         try {
 173             new ObjectOutputStream(response.getOutputStream()).writeObject(selectedPolicy);
 174         } catch (IOException e) {
 175             LOGGER.error(e);
 176             response.addHeader(errorMsg, "policyCopyError");
 177             response.addHeader(messageContent, e.getMessage());
 178             response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 179             return;
 180         }
 181         response.addHeader("Content-Type","application/json");
 182         response.setStatus(HttpServletResponse.SC_ACCEPTED);
 183         response.addHeader(operation, "push");
 184         response.addHeader("policyId", policyName);
 185         return;
 186         // TODO : Check point to push policies within PAP.
 187     }
 188 }