gerrit.onap Code Review - cps.git/blob

   1 /*
   2  *  ============LICENSE_START=======================================================
   3  *  Copyright (C) 2024-2025 OpenInfra Foundation Europe. 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  *
  17  *  SPDX-License-Identifier: Apache-2.0
  18  *  ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.cps.policyexecutor.stub.controller;
  22
  23 import com.fasterxml.jackson.core.JsonProcessingException;
  24 import com.fasterxml.jackson.databind.ObjectMapper;
  25 import java.util.regex.Matcher;
  26 import java.util.regex.Pattern;
  27 import lombok.RequiredArgsConstructor;
  28 import lombok.extern.slf4j.Slf4j;
  29 import org.onap.cps.policyexecutor.stub.api.OperationPermissionApi;
  30 import org.onap.cps.policyexecutor.stub.model.Operation;
  31 import org.onap.cps.policyexecutor.stub.model.PermissionRequest;
  32 import org.onap.cps.policyexecutor.stub.model.PermissionResponse;
  33 import org.springframework.http.HttpStatus;
  34 import org.springframework.http.HttpStatusCode;
  35 import org.springframework.http.ResponseEntity;
  36 import org.springframework.web.bind.annotation.RequestMapping;
  37 import org.springframework.web.bind.annotation.RestController;
  38
  39 @RestController
  40 @RequestMapping("/operation-permission/v1")
  41 @RequiredArgsConstructor
  42 @Slf4j
  43 public class PolicyExecutorStubController implements OperationPermissionApi {
  44
  45     private final Sleeper sleeper;
  46     private final ObjectMapper objectMapper;
  47
  48     private static final Pattern PATTERN_SIMULATION = Pattern.compile("policySimulation=(\\w+_\\w+)");
  49     private static final Pattern PATTERN_HTTP_ERROR = Pattern.compile("httpError_(\\d{3})");
  50     private static final Pattern PATTERN_SLOW_RESPONSE = Pattern.compile("slowResponse_(\\d{1,3})");
  51     private static final Pattern PATTERN_POLICY_RESPONSE = Pattern.compile("policyResponse_(\\w+)");
  52
  53     private int decisionCounter = 0;
  54
  55     @Override
  56     public ResponseEntity<PermissionResponse> initiatePermissionRequest(final String contentType,
  57                                                                         final PermissionRequest permissionRequest,
  58                                                                         final String accept,
  59                                                                         final String authorization) {
  60         log.info("Stub Policy Executor Invoked");
  61         log.info("Permission Request: {}", formatPermissionRequest(permissionRequest));
  62         if (permissionRequest.getOperations().isEmpty()) {
  63             return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
  64         }
  65         final Operation firstOperation = permissionRequest.getOperations().iterator().next();
  66         log.info("1st Operation: {} for resource: {}", firstOperation.getOperation(),
  67                                                        firstOperation.getResourceIdentifier());
  68         if (!"delete".equals(firstOperation.getOperation()) && firstOperation.getChangeRequest() == null) {
  69             log.warn("Change Request is required for {} operations", firstOperation.getOperation());
  70             return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
  71         }
  72         return createPolicyExecutionResponse(firstOperation.getResourceIdentifier());
  73     }
  74
  75     private ResponseEntity<PermissionResponse> createPolicyExecutionResponse(final String resourceIdentifier) {
  76         final String id = String.valueOf(++decisionCounter);
  77         String permissionResult = "allow";
  78         String message = "all good";
  79         Matcher matcher = PATTERN_SIMULATION.matcher(resourceIdentifier);
  80         if (matcher.find()) {
  81             final String simulation = matcher.group(1);
  82             matcher = PATTERN_SLOW_RESPONSE.matcher(simulation);
  83             if (matcher.matches()) {
  84                 try {
  85                     final int slowResponseTimeInSeconds = Integer.parseInt(matcher.group(1));
  86                     sleeper.haveALittleRest(slowResponseTimeInSeconds);
  87                 } catch (final InterruptedException e) {
  88                     log.trace("Sleep interrupted, re-interrupting the thread");
  89                     Thread.currentThread().interrupt(); // Re-interrupt the thread
  90                 }
  91             }
  92             matcher = PATTERN_HTTP_ERROR.matcher(simulation);
  93             if (matcher.matches()) {
  94                 final int errorCode = Integer.parseInt(matcher.group(1));
  95                 log.warn("Stub is mocking an error response, code: {}", errorCode);
  96                 return new ResponseEntity<>(HttpStatusCode.valueOf(errorCode));
  97             }
  98             matcher = PATTERN_POLICY_RESPONSE.matcher(simulation);
  99             if (matcher.matches()) {
 100                 permissionResult = matcher.group(1);
 101                 message = "Stub is mocking a policy response: " + permissionResult;
 102             }
 103         }
 104         log.info("Decision: {} ({})", permissionResult, message);
 105         return ResponseEntity.ok(new PermissionResponse(id, permissionResult, message));
 106     }
 107
 108     private String formatPermissionRequest(final PermissionRequest permissionRequest)  {
 109         try {
 110             return objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(permissionRequest);
 111         } catch (final JsonProcessingException jsonProcessingException) {
 112             log.error("Error while formatting permission request", jsonProcessingException);
 113             return "invalid json";
 114         }
 115     }
 116
 117 }