rulemgt/src/main/java/org/onap/holmes/rulemgt/dcae/DcaeConfigurationPolling.java

   1 /**
   2  * Copyright 2017 ZTE Corporation.
   3  * <p>
   4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
   5  * in compliance with the License. You may obtain a copy of the License at
   6  * <p>
   7  * http://www.apache.org/licenses/LICENSE-2.0
   8  * <p>
   9  * Unless required by applicable law or agreed to in writing, software distributed under the License
  10  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
  11  * or implied. See the License for the specific language governing permissions and limitations under
  12  * the License.
  13  */
  14 package org.onap.holmes.rulemgt.dcae;
  15
  16 import com.alibaba.fastjson.JSON;
  17 import com.alibaba.fastjson.JSONObject;
  18 import com.google.gson.Gson;
  19 import com.google.gson.GsonBuilder;
  20 import com.google.gson.JsonDeserializationContext;
  21 import com.google.gson.JsonDeserializer;
  22 import com.google.gson.JsonElement;
  23 import com.google.gson.JsonParseException;
  24 import com.google.gson.reflect.TypeToken;
  25
  26 import java.io.IOException;
  27 import java.io.UnsupportedEncodingException;
  28 import java.lang.reflect.Type;
  29 import java.util.HashMap;
  30 import java.util.List;
  31 import javax.ws.rs.core.MediaType;
  32
  33 import lombok.extern.slf4j.Slf4j;
  34 import org.apache.http.HttpResponse;
  35 import org.apache.http.client.methods.HttpDelete;
  36 import org.apache.http.client.methods.HttpGet;
  37 import org.apache.http.client.methods.HttpPut;
  38 import org.apache.http.entity.StringEntity;
  39 import org.apache.http.impl.client.CloseableHttpClient;
  40 import org.onap.holmes.common.dcae.DcaeConfigurationQuery;
  41 import org.onap.holmes.common.dcae.entity.DcaeConfigurations;
  42 import org.onap.holmes.common.dcae.entity.Rule;
  43 import org.onap.holmes.common.exception.CorrelationException;
  44 import org.onap.holmes.common.utils.GsonUtil;
  45 import org.onap.holmes.common.utils.HttpsUtils;
  46 import org.onap.holmes.common.utils.Md5Util;
  47 import org.onap.holmes.rulemgt.bean.request.RuleCreateRequest;
  48 import org.onap.holmes.rulemgt.bean.response.RuleQueryListResponse;
  49 import org.onap.holmes.rulemgt.bean.response.RuleResult4API;
  50
  51 @Slf4j
  52 public class DcaeConfigurationPolling implements Runnable {
  53
  54     public static final long POLLING_PERIOD = 30 * 1000L;
  55
  56     private String hostname;
  57
  58     private String url = "https://127.0.0.1:9101/api/holmes-rule-mgmt/v1/rule";
  59
  60     public DcaeConfigurationPolling(String hostname) {
  61         this.hostname = hostname;
  62     }
  63
  64     private String prevConfigMd5 = Md5Util.md5(null);
  65
  66     private boolean prevResult = false;
  67
  68     @Override
  69     public void run() {
  70         DcaeConfigurations dcaeConfigurations = null;
  71         try {
  72             dcaeConfigurations = DcaeConfigurationQuery.getDcaeConfigurations(hostname);
  73             String md5 = Md5Util.md5(dcaeConfigurations);
  74             if (prevResult && prevConfigMd5.equals(md5)) {
  75                 log.info("Operation aborted due to identical configurations.");
  76                 return;
  77             }
  78             prevConfigMd5 = md5;
  79             prevResult = false;
  80         } catch (CorrelationException e) {
  81             log.error("Failed to fetch DCAE configurations. " + e.getMessage(), e);
  82         } catch (Exception e) {
  83             log.info("Failed to generate the MD5 information for new configurations.", e);
  84         }
  85         RuleQueryListResponse ruleQueryListResponse = null;
  86         if (dcaeConfigurations != null) {
  87             try {
  88                 ruleQueryListResponse = getAllCorrelationRules();
  89             } catch (CorrelationException e) {
  90                 log.error("Failed to get right response!" + e.getMessage(), e);
  91             } catch (IOException e) {
  92                 log.error("Failed to extract response entity. " + e.getMessage(), e);
  93             } catch (Exception e) {
  94                 log.error("Failed to build http client. " + e.getMessage(), e);
  95             }
  96         }
  97         if (ruleQueryListResponse != null) {
  98             List<RuleResult4API> ruleResult4APIs = ruleQueryListResponse.getCorrelationRules();
  99             deleteAllCorrelationRules(ruleResult4APIs);
 100             try {
 101                 prevResult = addAllCorrelationRules(dcaeConfigurations);
 102             } catch (CorrelationException e) {
 103                 log.error("Failed to add rules. " + e.getMessage(), e);
 104                 prevResult = false;
 105             }
 106         }
 107     }
 108
 109     public RuleQueryListResponse getAllCorrelationRules() throws CorrelationException, IOException {
 110         HashMap<String, String> headers = new HashMap<>();
 111         headers.put("Content-Type", MediaType.APPLICATION_JSON);
 112         CloseableHttpClient httpClient = null;
 113         HttpGet httpGet = new HttpGet(url);
 114         try {
 115             httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
 116             HttpResponse httpResponse = HttpsUtils.get(httpGet, headers, httpClient);
 117             String response = HttpsUtils.extractResponseEntity(httpResponse);
 118             return JSONObject.parseObject(response, RuleQueryListResponse.class);
 119         } finally {
 120             httpGet.releaseConnection();
 121             closeHttpClient(httpClient);
 122         }
 123     }
 124
 125     private boolean addAllCorrelationRules(DcaeConfigurations dcaeConfigurations) throws CorrelationException {
 126         boolean suc = false;
 127         for (Rule rule : dcaeConfigurations.getDefaultRules()) {
 128             RuleCreateRequest ruleCreateRequest = getRuleCreateRequest(rule);
 129             String content = "";
 130             try {
 131                 content = GsonUtil.beanToJson(ruleCreateRequest);
 132             } catch (Exception e) {
 133                 throw new CorrelationException("Failed to convert the message object to a json string.", e);
 134             }
 135             HashMap<String, String> headers = new HashMap<>();
 136             headers.put("Content-Type", MediaType.APPLICATION_JSON);
 137             headers.put("Accept", MediaType.APPLICATION_JSON);
 138             HttpResponse httpResponse;
 139             CloseableHttpClient httpClient = null;
 140             HttpPut httpPut = new HttpPut(url);
 141             try {
 142                 httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
 143                 httpResponse = HttpsUtils
 144                         .put(httpPut, headers, new HashMap<>(), new StringEntity(content), httpClient);
 145             } catch (UnsupportedEncodingException e) {
 146                 throw new CorrelationException("Failed to create https entity.", e);
 147             } catch (Exception e) {
 148                 throw new CorrelationException(e.getMessage());
 149             } finally {
 150                 httpPut.releaseConnection();
 151                 closeHttpClient(httpClient);
 152             }
 153             if (httpResponse != null) {
 154                 suc = httpResponse.getStatusLine().getStatusCode() == 200;
 155             }
 156             if (!suc) {
 157                 break;
 158             }
 159         }
 160         return suc;
 161     }
 162
 163     private void deleteAllCorrelationRules(List<RuleResult4API> ruleResult4APIs) {
 164         ruleResult4APIs.forEach(correlationRule -> {
 165             HashMap<String, String> headers = new HashMap<>();
 166             headers.put("Content-Type", MediaType.APPLICATION_JSON);
 167             CloseableHttpClient httpClient = null;
 168             HttpDelete httpDelete = new HttpDelete(url + "/" + correlationRule.getRuleId());
 169             try {
 170                 httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
 171                 HttpsUtils.delete(httpDelete, headers, httpClient);
 172             } catch (Exception e) {
 173                 log.warn("Failed to delete rule, the rule id is : " + correlationRule.getRuleId()
 174                         + " exception messge is : " + e.getMessage(), e);
 175             } finally {
 176                 httpDelete.releaseConnection();
 177                 closeHttpClient(httpClient);
 178             }
 179         });
 180     }
 181
 182     private RuleCreateRequest getRuleCreateRequest(Rule rule) {
 183         RuleCreateRequest ruleCreateRequest = new RuleCreateRequest();
 184         ruleCreateRequest.setLoopControlName(rule.getLoopControlName());
 185         ruleCreateRequest.setRuleName(rule.getName());
 186         ruleCreateRequest.setContent(rule.getContents());
 187         ruleCreateRequest.setDescription("");
 188         ruleCreateRequest.setEnabled(1);
 189         return ruleCreateRequest;
 190     }
 191
 192     private void closeHttpClient(CloseableHttpClient httpClient) {
 193         if (httpClient != null) {
 194             try {
 195                 httpClient.close();
 196             } catch (IOException e) {
 197                 log.warn("Failed to close http client!");
 198             }
 199         }
 200     }
 201 }