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 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         @Autowired
  66         public PushPolicyController(CommonClassDao commonClassDao){
  67                 PushPolicyController.commonClassDao = commonClassDao;
  68         }
  69         /*
  70          * This is an empty constructor
  71          */
  72         public PushPolicyController(){}
  73
  74         @RequestMapping(value="/pushPolicy", method=RequestMethod.POST)
  75         public void pushPolicy(HttpServletRequest request, HttpServletResponse response){
  76                 ObjectMapper mapper = new ObjectMapper();
  77                 mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
  78                 try {
  79                         JsonNode root = mapper.readTree(request.getInputStream());
  80                         String policyScope = root.get("policyScope").asText();
  81                         String filePrefix = root.get("filePrefix").asText();
  82                         String policyName = root.get(policyNames).asText();
  83                         String pdpGroup = root.get("pdpGroup").asText();
  84                         String requestID = request.getHeader("X-ECOMP-RequestID");
  85                         if(requestID==null){
  86                                 requestID = UUID.randomUUID().toString();
  87                 LOGGER.info("No request ID provided, sending generated ID: " + requestID);
  88                         }
  89                         LOGGER.info("Push policy Request : " + root.asText());
  90                         String policyVersionName = policyScope.replace(".", File.separator) + File.separator
  91                                         + filePrefix + policyName;
  92                         List<?> policyVersionObject = commonClassDao.getDataById(PolicyVersion.class, policyNames, policyVersionName);
  93                         if(policyVersionObject!=null){
  94                                 PolicyVersion policyVersion = (PolicyVersion) policyVersionObject.get(0);
  95                                 String policyID = policyVersionName.replace(File.separator, "."); // This is before adding version.
  96                                 policyVersionName += "." + policyVersion.getActiveVersion() + ".xml";
  97                                 addPolicyToGroup(policyScope, policyID, policyVersionName.replace(File.separator, "."), pdpGroup, response);
  98                         }else{
  99                                 String message = "Unknown Policy '" + policyName + "'";
 100                                 PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " " + message);
 101                                 response.addHeader(errorMsg, "unknownPolicy");
 102                                 response.addHeader(operation, "push");
 103                                 response.addHeader(messageContent, message);
 104                                 response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 105                                 return;
 106                         }
 107                 } catch (NullPointerException | IOException e) {
 108                         LOGGER.error(e);
 109                         response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 110                         response.addHeader(errorMsg, "unknown");
 111                         response.addHeader(operation, "push");
 112                         return;
 113                 }
 114         }
 115
 116         private void addPolicyToGroup(String policyScope, String policyID, String policyName, String pdpGroup, HttpServletResponse response) {
 117                 StdPDPGroup selectedPDPGroup = null;
 118                 StdPDPPolicy selectedPolicy = null;
 119                 //Get the current policies from the Group and Add the new one
 120                 try {
 121                         selectedPDPGroup = (StdPDPGroup) XACMLPapServlet.getPAPEngine().getGroup(pdpGroup);
 122                 } catch (PAPException e1) {
 123                         PolicyLogger.error(e1);
 124                 }
 125                 if(selectedPDPGroup==null){
 126                         String message = "Unknown groupId '" + selectedPDPGroup + "'";
 127                         PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " " + message);
 128                         response.addHeader(errorMsg, "unknownGroupId");
 129                         response.addHeader(operation, "push");
 130                         response.addHeader(messageContent, message);
 131                         response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 132                         return;
 133                 }
 134                 //Get PolicyEntity from DB;
 135                 EntityManager em = XACMLPapServlet.getEmf().createEntityManager();
 136                 Query createPolicyQuery = em.createQuery("SELECT p FROM PolicyEntity p WHERE p.scope=:scope AND p.policyName=:policyName");
 137                 createPolicyQuery.setParameter("scope", policyScope);
 138                 createPolicyQuery.setParameter(policyNames, policyName.substring(policyScope.length()+1));
 139                 List<?> createPolicyQueryList = createPolicyQuery.getResultList();
 140                 PolicyEntity policyEntity = null;
 141                 if(!createPolicyQueryList.isEmpty()){
 142                         policyEntity = (PolicyEntity)createPolicyQueryList.get(0);
 143                 }else{
 144                         PolicyLogger.error("Somehow, more than one policy with the same scope, name, and deleted status were found in the database");
 145                         String message = "Unknown Policy '" + policyName + "'";
 146                         PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " " + message);
 147                         response.addHeader(errorMsg, "unknownPolicy");
 148                         response.addHeader(operation, "push");
 149                         response.addHeader(messageContent, message);
 150                         response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 151                         return;
 152                 }
 153                 File temp = new File(policyName);
 154                 try {
 155                         BufferedWriter bw = new BufferedWriter(new FileWriter(temp));
 156                         bw.write(policyEntity.getPolicyData());
 157                         bw.close();
 158                         URI selectedURI = temp.toURI();
 159                         // Create the policy Object
 160                         selectedPolicy = new StdPDPPolicy(policyName, true, policyID, selectedURI);
 161                 } catch (IOException e) {
 162                         LOGGER.error("Unable to create policy '" + policyName + "': "+ e.getMessage(),e);
 163                 }
 164                 try {
 165                         new ObjectOutputStream(response.getOutputStream()).writeObject(selectedPolicy);
 166                 } catch (IOException e) {
 167                         LOGGER.error(e);
 168                         response.addHeader(errorMsg, "policyCopyError");
 169                         response.addHeader(messageContent, e.getMessage());
 170                         response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 171                         return;
 172                 }
 173                 response.addHeader("Content-Type","application/json");
 174                 response.setStatus(HttpServletResponse.SC_ACCEPTED);
 175                 response.addHeader(operation, "push");
 176                 response.addHeader("policyId", policyName);
 177                 return;
 178                 // TODO : Check point to push policies within PAP.
 179         }
 180 }