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.JSONObject;
  17
  18 import java.io.IOException;
  19 import java.io.UnsupportedEncodingException;
  20 import java.util.HashMap;
  21 import java.util.List;
  22 import javax.ws.rs.core.MediaType;
  23
  24 import lombok.extern.slf4j.Slf4j;
  25 import org.apache.http.HttpResponse;
  26 import org.apache.http.client.methods.HttpDelete;
  27 import org.apache.http.client.methods.HttpGet;
  28 import org.apache.http.client.methods.HttpPut;
  29 import org.apache.http.entity.StringEntity;
  30 import org.apache.http.impl.client.CloseableHttpClient;
  31 import org.onap.holmes.common.dcae.DcaeConfigurationQuery;
  32 import org.onap.holmes.common.dcae.entity.DcaeConfigurations;
  33 import org.onap.holmes.common.dcae.entity.Rule;
  34 import org.onap.holmes.common.exception.CorrelationException;
  35 import org.onap.holmes.common.utils.GsonUtil;
  36 import org.onap.holmes.common.utils.HttpsUtils;
  37 import org.onap.holmes.common.utils.Md5Util;
  38 import org.onap.holmes.rulemgt.bean.request.RuleCreateRequest;
  39 import org.onap.holmes.rulemgt.bean.response.RuleQueryListResponse;
  40 import org.onap.holmes.rulemgt.bean.response.RuleResult4API;
  41
  42 @Slf4j
  43 public class DcaeConfigurationPolling implements Runnable {
  44
  45     public static final long POLLING_PERIOD = 30 * 1000L;
  46
  47     private String hostname;
  48
  49     private String url = "https://127.0.0.1:9101/api/holmes-rule-mgmt/v1/rule";
  50
  51     public DcaeConfigurationPolling(String hostname) {
  52         this.hostname = hostname;
  53     }
  54
  55     private String prevConfigMd5 = Md5Util.md5(null);
  56
  57     private boolean prevResult = false;
  58
  59     @Override
  60     public void run() {
  61         DcaeConfigurations dcaeConfigurations = null;
  62         try {
  63             dcaeConfigurations = DcaeConfigurationQuery.getDcaeConfigurations(hostname);
  64             String md5 = Md5Util.md5(dcaeConfigurations);
  65             if (prevResult && prevConfigMd5.equals(md5)) {
  66                 log.info("Operation aborted due to identical configurations.");
  67                 return;
  68             }
  69             prevConfigMd5 = md5;
  70             prevResult = false;
  71         } catch (CorrelationException e) {
  72             log.error("Failed to fetch DCAE configurations. " + e.getMessage(), e);
  73         } catch (Exception e) {
  74             log.info("Failed to generate the MD5 information for new configurations.", e);
  75         }
  76         RuleQueryListResponse ruleQueryListResponse = null;
  77         if (dcaeConfigurations != null) {
  78             try {
  79                 ruleQueryListResponse = getAllCorrelationRules();
  80             } catch (CorrelationException e) {
  81                 log.error("Failed to get right response!" + e.getMessage(), e);
  82             } catch (IOException e) {
  83                 log.error("Failed to extract response entity. " + e.getMessage(), e);
  84             } catch (Exception e) {
  85                 log.error("Failed to build http client. " + e.getMessage(), e);
  86             }
  87         }
  88         if (ruleQueryListResponse != null) {
  89             List<RuleResult4API> ruleResult4APIs = ruleQueryListResponse.getCorrelationRules();
  90             deleteAllCorrelationRules(ruleResult4APIs);
  91             try {
  92                 prevResult = addAllCorrelationRules(dcaeConfigurations);
  93             } catch (CorrelationException e) {
  94                 log.error("Failed to add rules. " + e.getMessage(), e);
  95                 prevResult = false;
  96             }
  97         }
  98     }
  99
 100     public RuleQueryListResponse getAllCorrelationRules() throws CorrelationException, IOException {
 101         HashMap<String, String> headers = new HashMap<>();
 102         headers.put("Content-Type", MediaType.APPLICATION_JSON);
 103         CloseableHttpClient httpClient = null;
 104         HttpGet httpGet = new HttpGet(url);
 105         try {
 106             httpClient = HttpsUtils.getConditionalHttpsClient(HttpsUtils.DEFUALT_TIMEOUT);
 107             HttpResponse httpResponse = HttpsUtils.get(httpGet, headers, httpClient);
 108             String response = HttpsUtils.extractResponseEntity(httpResponse);
 109             return JSONObject.parseObject(response, RuleQueryListResponse.class);
 110         } finally {
 111             httpGet.releaseConnection();
 112             closeHttpClient(httpClient);
 113         }
 114     }
 115
 116     private boolean addAllCorrelationRules(DcaeConfigurations dcaeConfigurations) throws CorrelationException {
 117         boolean suc = false;
 118         for (Rule rule : dcaeConfigurations.getDefaultRules()) {
 119             RuleCreateRequest ruleCreateRequest = getRuleCreateRequest(rule);
 120             String content = "";
 121             try {
 122                 content = GsonUtil.beanToJson(ruleCreateRequest);
 123             } catch (Exception e) {
 124                 throw new CorrelationException("Failed to convert the message object to a json string.", e);
 125             }
 126             HashMap<String, String> headers = new HashMap<>();
 127             headers.put("Content-Type", MediaType.APPLICATION_JSON);
 128             headers.put("Accept", MediaType.APPLICATION_JSON);
 129             HttpResponse httpResponse;
 130             CloseableHttpClient httpClient = null;
 131             HttpPut httpPut = new HttpPut(url);
 132             try {
 133                 httpClient = HttpsUtils.getConditionalHttpsClient(HttpsUtils.DEFUALT_TIMEOUT);
 134                 httpResponse = HttpsUtils
 135                         .put(httpPut, headers, new HashMap<>(), new StringEntity(content), httpClient);
 136             } catch (UnsupportedEncodingException e) {
 137                 throw new CorrelationException("Failed to create https entity.", e);
 138             } catch (Exception e) {
 139                 throw new CorrelationException(e.getMessage());
 140             } finally {
 141                 httpPut.releaseConnection();
 142                 closeHttpClient(httpClient);
 143             }
 144             if (httpResponse != null) {
 145                 suc = httpResponse.getStatusLine().getStatusCode() == 200;
 146             }
 147             if (!suc) {
 148                 break;
 149             }
 150         }
 151         return suc;
 152     }
 153
 154     private void deleteAllCorrelationRules(List<RuleResult4API> ruleResult4APIs) {
 155         ruleResult4APIs.forEach(correlationRule -> {
 156             HashMap<String, String> headers = new HashMap<>();
 157             headers.put("Content-Type", MediaType.APPLICATION_JSON);
 158             CloseableHttpClient httpClient = null;
 159             HttpDelete httpDelete = new HttpDelete(url + "/" + correlationRule.getRuleId());
 160             try {
 161                 httpClient = HttpsUtils.getConditionalHttpsClient(HttpsUtils.DEFUALT_TIMEOUT);
 162                 HttpsUtils.delete(httpDelete, headers, httpClient);
 163             } catch (Exception e) {
 164                 log.warn("Failed to delete rule, the rule id is : " + correlationRule.getRuleId()
 165                         + " exception messge is : " + e.getMessage(), e);
 166             } finally {
 167                 httpDelete.releaseConnection();
 168                 closeHttpClient(httpClient);
 169             }
 170         });
 171     }
 172
 173     private RuleCreateRequest getRuleCreateRequest(Rule rule) {
 174         RuleCreateRequest ruleCreateRequest = new RuleCreateRequest();
 175         ruleCreateRequest.setLoopControlName(rule.getLoopControlName());
 176         ruleCreateRequest.setRuleName(rule.getName());
 177         ruleCreateRequest.setContent(rule.getContents());
 178         ruleCreateRequest.setDescription("");
 179         ruleCreateRequest.setEnabled(1);
 180         return ruleCreateRequest;
 181     }
 182
 183     private void closeHttpClient(CloseableHttpClient httpClient) {
 184         if (httpClient != null) {
 185             try {
 186                 httpClient.close();
 187             } catch (IOException e) {
 188                 log.warn("Failed to close http client!");
 189             }
 190         }
 191     }
 192 }