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     /*
  78      * This is an empty constructor
  79      */
  80     public PushPolicyController() {
  81     }
  82
  83     @RequestMapping(value = "/pushPolicy", method = RequestMethod.POST)
  84     public void pushPolicy(HttpServletRequest request, HttpServletResponse response) {
  85         ObjectMapper mapper = new ObjectMapper();
  86         mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
  87         try {
  88             JsonNode root = mapper.readTree(request.getInputStream());
  89             String policyScope = root.get("policyScope").asText();
  90             String filePrefix = root.get("filePrefix").asText();
  91             String policyName = root.get(policyNames).asText();
  92             String pdpGroup = root.get("pdpGroup").asText();
  93             String requestID = request.getHeader("X-ECOMP-RequestID");
  94             if (requestID == null) {
  95                 requestID = UUID.randomUUID().toString();
  96                 LOGGER.info("No request ID provided, sending generated ID: " + requestID);
  97             }
  98             LOGGER.info("Push policy Request to get the selectedPolicy : " + root.asText());
  99             String policyVersionName = policyScope.replace(".", File.separator) + File.separator
 100                     + filePrefix + policyName;
 101             List<?> policyVersionObject =
 102                     commonClassDao.getDataById(PolicyVersion.class, policyNames, policyVersionName);
 103             if (policyVersionObject != null) {
 104                 PolicyVersion policyVersion = (PolicyVersion) policyVersionObject.get(0);
 105                 String policyID = policyVersionName.replace(File.separator, "."); // This is before adding version.
 106                 policyVersionName += "." + policyVersion.getActiveVersion() + ".xml";
 107                 addPolicyToGroup(policyScope, policyID, policyVersionName.replace(File.separator, "."), pdpGroup,
 108                         response);
 109             } else {
 110                 String message = "Unknown Policy '" + policyName + "'";
 111                 PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " " + message);
 112                 response.addHeader(errorMsg, "unknownPolicy");
 113                 response.addHeader(operation, "push");
 114                 response.addHeader(messageContent, message);
 115                 response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 116             }
 117         } catch (NullPointerException | IOException e) {
 118             LOGGER.error(e);
 119             response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 120             response.addHeader(errorMsg, "unknown");
 121             response.addHeader(operation, "push");
 122         }
 123     }
 124
 125     private void addPolicyToGroup(String policyScope, String policyID, String policyName, String pdpGroup,
 126                                   HttpServletResponse response) {
 127         StdPDPGroup selectedPDPGroup = null;
 128         StdPDPPolicy selectedPolicy = null;
 129         //Get the selected PDP Group to push the policy
 130         try {
 131             selectedPDPGroup = (StdPDPGroup) XACMLPapServlet.getPAPEngine().getGroup(pdpGroup);
 132         } catch (PAPException e1) {
 133             PolicyLogger.error(e1);
 134         }
 135         if (selectedPDPGroup == null) {
 136             String message = "Unknown groupId '" + selectedPDPGroup + "'";
 137             if (!message.matches(REGEX)) {
 138                 message = "Unknown groupId";
 139             }
 140             PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " " + message);
 141             response.addHeader(errorMsg, "unknownGroupId");
 142             response.addHeader(operation, "push");
 143             response.addHeader(messageContent, message);
 144             response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 145             return;
 146         }
 147         //Get PolicyEntity from DB;
 148         EntityManager em = XACMLPapServlet.getEmf().createEntityManager();
 149         Query createPolicyQuery =
 150                 em.createQuery("SELECT p FROM PolicyEntity p WHERE p.scope=:scope AND p.policyName=:policyName");
 151         createPolicyQuery.setParameter("scope", policyScope);
 152         createPolicyQuery.setParameter(policyNames, policyName.substring(policyScope.length() + 1));
 153         List<?> createPolicyQueryList = createPolicyQuery.getResultList();
 154         PolicyEntity policyEntity = null;
 155         if (!createPolicyQueryList.isEmpty()) {
 156             policyEntity = (PolicyEntity) createPolicyQueryList.get(0);
 157         } else {
 158             PolicyLogger
 159                     .error("Somehow, more than one policy with the same scope, name, and deleted status were found in" +
 160                             " the database");
 161             String message = "Unknown Policy '" + policyName + "'";
 162             PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE + " " + message);
 163             response.addHeader(errorMsg, "unknownPolicy");
 164             response.addHeader(operation, "push");
 165             response.addHeader(messageContent, message);
 166             response.setStatus(HttpServletResponse.SC_NOT_FOUND);
 167             return;
 168         }
 169         File temp = new File(policyName);
 170         try (BufferedWriter bw = new BufferedWriter(new FileWriter(temp))) {
 171             bw.write(policyEntity.getPolicyData());
 172             URI selectedURI = temp.toURI();
 173             // Create the policy Object
 174             selectedPolicy = new StdPDPPolicy(policyName, true, policyID, selectedURI);
 175         } catch (IOException e) {
 176             LOGGER.error("Unable to get policy '" + policyName + "': " + e.getMessage(), e);
 177         }
 178         try {
 179             new ObjectOutputStream(response.getOutputStream()).writeObject(selectedPolicy);
 180         } catch (IOException e) {
 181             LOGGER.error(e);
 182             response.addHeader(errorMsg, "policyCopyError");
 183             response.addHeader(messageContent, e.getMessage());
 184             response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 185             return;
 186         }
 187         response.addHeader("Content-Type", "application/json");
 188         response.setStatus(HttpServletResponse.SC_ACCEPTED);
 189         response.addHeader(operation, "push");
 190         response.addHeader("policyId", policyName);
 191         // TODO : Check point to push policies within PAP.
 192     }
 193 }