ms/neng/src/main/java/org/onap/ccsdk/apps/ms/neng/service/extinf/impl/PolicyFinderServiceImpl.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP : CCSDK.apps
   4  * ================================================================================
   5  * Copyright (C) 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
  21 package org.onap.ccsdk.apps.ms.neng.service.extinf.impl;
  22
  23 import com.fasterxml.jackson.core.type.TypeReference;
  24 import com.fasterxml.jackson.databind.ObjectMapper;
  25 import java.net.URI;
  26 import java.security.cert.X509Certificate;
  27 import java.util.List;
  28 import java.util.Map;
  29 import java.util.logging.Logger;
  30 import javax.net.ssl.SSLContext;
  31 import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
  32 import org.apache.http.conn.ssl.TrustStrategy;
  33 import org.apache.http.impl.client.CloseableHttpClient;
  34 import org.apache.http.impl.client.HttpClients;
  35 import org.onap.ccsdk.apps.ms.neng.core.exceptions.NengException;
  36 import org.onap.ccsdk.apps.ms.neng.core.policy.PolicyFinder;
  37 import org.onap.ccsdk.apps.ms.neng.core.resource.model.GetConfigRequest;
  38 import org.onap.ccsdk.apps.ms.neng.core.resource.model.GetConfigResponse;
  39 import org.onap.ccsdk.apps.ms.neng.core.rs.interceptors.PolicyManagerAuthorizationInterceptor;
  40 import org.onap.ccsdk.apps.ms.neng.extinf.props.PolicyManagerProps;
  41 import org.springframework.beans.factory.annotation.Autowired;
  42 import org.springframework.beans.factory.annotation.Qualifier;
  43 import org.springframework.boot.web.client.RestTemplateBuilder;
  44 import org.springframework.http.HttpStatus;
  45 import org.springframework.http.MediaType;
  46 import org.springframework.http.RequestEntity;
  47 import org.springframework.http.ResponseEntity;
  48 import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
  49 import org.springframework.stereotype.Component;
  50 import org.springframework.web.client.HttpStatusCodeException;
  51 import org.springframework.web.client.RestTemplate;
  52
  53 /**
  54  * Finds policies from policy manager.
  55  */
  56 @Component
  57 @Qualifier("PolicyFinderServiceImpl")
  58 public class PolicyFinderServiceImpl implements PolicyFinder {
  59     private static Logger log = Logger.getLogger(PolicyFinderServiceImpl.class.getName());
  60
  61     @Autowired PolicyManagerProps policManProps;
  62     @Autowired
  63     @Qualifier("policyMgrRestTempBuilder")
  64     RestTemplateBuilder policyMgrRestTempBuilder;
  65     @Autowired PolicyManagerAuthorizationInterceptor authInt;
  66     RestTemplate restTemplate;
  67
  68     /**
  69      * Find policy with the given name from policy manager.
  70      */
  71     @Override
  72     public Map<String, Object> findPolicy(String policyName) throws Exception {
  73         Object response = getConfig(policyName).getResponse();
  74         if (response instanceof List) {
  75             @SuppressWarnings("unchecked")
  76             List<Map<String, Object>> policyList = (List<Map<String, Object>>)response;
  77             return ((policyList != null && policyList.size() > 0) ? policyList.get(0) : null);
  78         } else {
  79             return null;
  80         }
  81     }
  82
  83     GetConfigResponse getConfig(String policyName) throws Exception {
  84         GetConfigRequest getConfigRequest = new GetConfigRequest();
  85         getConfigRequest.setPolicyName(policyName);
  86         GetConfigResponse getConfigResponse = makeOutboundCall(getConfigRequest, GetConfigResponse.class);
  87         return getConfigResponse;
  88     }
  89
  90     <T, R> GetConfigResponse makeOutboundCall(T request, Class<R> response) throws Exception {
  91         log.info("Policy Manager  - " + policManProps.getUrl());
  92         RequestEntity<T> re = RequestEntity.post(new URI(policManProps.getUrl()))
  93                         .accept(MediaType.APPLICATION_JSON).contentType(MediaType.APPLICATION_JSON).body(request);
  94         try {
  95             ResponseEntity<Object> resp = getRestTemplate().exchange(re, Object.class);
  96             if (HttpStatus.OK.equals(resp.getStatusCode())) {
  97                 ObjectMapper objectmapper = new ObjectMapper();
  98                 System.out.println(objectmapper.writeValueAsString(resp.getBody()));
  99                 List<Map<Object, Object>> respObj = objectmapper.readValue(
 100                                 objectmapper.writeValueAsString(resp.getBody()),
 101                                 new TypeReference<List<Map<Object, Object>>>() {});
 102                 transformConfigObject(objectmapper, respObj);
 103                 GetConfigResponse getConfigResp = new GetConfigResponse();
 104                 getConfigResp.setResponse(respObj);
 105                 return getConfigResp;
 106             }
 107         } catch (HttpStatusCodeException e) {
 108             handleError(e);
 109         }
 110         throw new NengException("Error while retrieving policy from policy manager.");
 111     }
 112
 113     void handleError(HttpStatusCodeException e) throws Exception {
 114         String respString = e.getResponseBodyAsString();
 115         log.info(respString);
 116         if (HttpStatus.NOT_FOUND.equals(e.getStatusCode()) && (respString != null && respString.contains(""))) {
 117             throw new NengException("Policy not found in policy manager.");
 118         }
 119         throw new NengException("Error while retrieving policy from policy manager.");
 120     }
 121
 122     /**
 123      * Transforms the 'config' element (which is received as a JSON string) to a map like a JSON object.
 124      */
 125     void transformConfigObject(ObjectMapper objectmapper, List<Map<Object, Object>> respObj) throws Exception {
 126         Object configElement = respObj.get(0).get("config");
 127         if (configElement instanceof String) {
 128             Map<Object, Object> obj = objectmapper.readValue(configElement.toString(),
 129                             new TypeReference<Map<Object, Object>>() {});
 130             respObj.get(0).put("config", obj);
 131         }
 132     }
 133
 134     RestTemplate getRestTemplate() throws Exception {
 135         if (restTemplate != null) {
 136             return restTemplate;
 137         }
 138         TrustStrategy acceptingTrustStrategy = (X509Certificate[] chain, String authType) -> true;
 139         SSLContext sslContext = org.apache.http.ssl.SSLContexts.custom()
 140                         .loadTrustMaterial(null, acceptingTrustStrategy).build();
 141         SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext);
 142         CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(csf).build();
 143         HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
 144         requestFactory.setHttpClient(httpClient);
 145         restTemplate = new RestTemplate(requestFactory);
 146         restTemplate.getInterceptors().add(getAuthInt());
 147         return restTemplate;
 148     }
 149
 150     RestTemplateBuilder getPolicyMgrRestTempBuilder() {
 151         return policyMgrRestTempBuilder;
 152     }
 153
 154     void setPolicyMgrRestTempBuilder(RestTemplateBuilder policyMgrRestTempBuilder) {
 155         this.policyMgrRestTempBuilder = policyMgrRestTempBuilder;
 156     }
 157
 158     PolicyManagerAuthorizationInterceptor getAuthInt() {
 159         return authInt;
 160     }
 161
 162     void setAuthInt(PolicyManagerAuthorizationInterceptor authInt) {
 163         this.authInt = authInt;
 164     }
 165 }