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

   1 /**
   2  * Copyright 2017 ZTE Corporation.
   3  *
   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  *
   7  * http://www.apache.org/licenses/LICENSE-2.0
   8  *
   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.google.gson.Gson;
  18 import com.google.gson.GsonBuilder;
  19 import com.google.gson.JsonDeserializationContext;
  20 import com.google.gson.JsonDeserializer;
  21 import com.google.gson.JsonElement;
  22 import com.google.gson.JsonParseException;
  23 import com.google.gson.reflect.TypeToken;
  24 import java.io.IOException;
  25 import java.io.UnsupportedEncodingException;
  26 import java.lang.reflect.Type;
  27 import java.util.HashMap;
  28 import java.util.List;
  29 import javax.ws.rs.core.MediaType;
  30 import lombok.extern.slf4j.Slf4j;
  31 import org.apache.http.HttpResponse;
  32 import org.apache.http.entity.StringEntity;
  33 import org.apache.http.impl.client.CloseableHttpClient;
  34 import org.onap.holmes.common.dcae.DcaeConfigurationQuery;
  35 import org.onap.holmes.common.dcae.entity.DcaeConfigurations;
  36 import org.onap.holmes.common.dcae.entity.Rule;
  37 import org.onap.holmes.common.exception.CorrelationException;
  38 import org.onap.holmes.common.utils.GsonUtil;
  39 import org.onap.holmes.common.utils.HttpsUtils;
  40 import org.onap.holmes.common.utils.Md5Util;
  41 import org.onap.holmes.rulemgt.bean.request.RuleCreateRequest;
  42 import org.onap.holmes.rulemgt.bean.response.RuleQueryListResponse;
  43 import org.onap.holmes.rulemgt.bean.response.RuleResult4API;
  44
  45 @Slf4j
  46 public class DcaeConfigurationPolling implements Runnable {
  47
  48     public static final long POLLING_PERIOD = 30 * 1000L;
  49
  50     private String hostname;
  51
  52     private String url = "https://127.0.0.1:9101/api/holmes-rule-mgmt/v1/rule";
  53
  54     public DcaeConfigurationPolling(String hostname) {
  55         this.hostname = hostname;
  56     }
  57
  58     private String prevConfigMd5 = Md5Util.md5(null);
  59
  60     private boolean prevResult = false;
  61
  62     @Override
  63     public void run() {
  64         DcaeConfigurations dcaeConfigurations = null;
  65         try {
  66             dcaeConfigurations = DcaeConfigurationQuery.getDcaeConfigurations(hostname);
  67             String md5 = Md5Util.md5(dcaeConfigurations);
  68             if (prevResult && prevConfigMd5.equals(md5)){
  69                 log.info("Operation aborted due to identical Configurations.");
  70                 return;
  71             }
  72             prevConfigMd5 = md5;
  73             prevResult = false;
  74         } catch (CorrelationException e) {
  75             log.error("Failed to fetch DCAE configurations. " + e.getMessage(), e);
  76         } catch (Exception e) {
  77             log.info("Failed to generate the MD5 information for new configurations.", e);
  78         }
  79         RuleQueryListResponse ruleQueryListResponse = null;
  80         if (dcaeConfigurations != null) {
  81             try {
  82                 ruleQueryListResponse = getAllCorrelationRules();
  83             } catch (CorrelationException e) {
  84                 log.error("Failed to get right response!" + e.getMessage(), e);
  85             } catch (IOException e) {
  86                 log.error("Failed to extract response entity. " + e.getMessage(), e);
  87             } catch (Exception e) {
  88                 log.error("Failed to build http client. " + e.getMessage(), e);
  89             }
  90         }
  91         if (ruleQueryListResponse != null) {
  92             List<RuleResult4API> ruleResult4APIs = ruleQueryListResponse.getCorrelationRules();
  93             deleteAllCorrelationRules(ruleResult4APIs);
  94             try {
  95                 prevResult = addAllCorrelationRules(dcaeConfigurations);
  96             } catch (CorrelationException e) {
  97                 log.error("Failed to add rules. " + e.getMessage(), e);
  98                 prevResult = false;
  99             }
 100         }
 101     }
 102
 103     public RuleQueryListResponse getAllCorrelationRules() throws CorrelationException, IOException {
 104               HashMap<String, String> headers = new HashMap<>();
 105         headers.put("Content-Type", MediaType.APPLICATION_JSON);
 106         CloseableHttpClient httpClient = null;
 107         try {
 108             httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
 109             HttpResponse httpResponse = HttpsUtils.get(url, headers, httpClient);
 110             String response = HttpsUtils.extractResponseEntity(httpResponse);
 111             return JSON.parseObject(response,RuleQueryListResponse.class);
 112         } finally {
 113             closeHttpClient(httpClient);
 114         }
 115     }
 116
 117     private boolean addAllCorrelationRules(DcaeConfigurations dcaeConfigurations) throws CorrelationException {
 118         boolean suc = false;
 119         for (Rule rule : dcaeConfigurations.getDefaultRules()) {
 120             RuleCreateRequest ruleCreateRequest = getRuleCreateRequest(rule);
 121             String content = "";
 122             try {
 123                 content = GsonUtil.beanToJson(ruleCreateRequest);
 124             } catch (Exception e) {
 125                 throw new CorrelationException("Failed to convert the message object to a json string.", e);
 126             }
 127             HashMap<String, String> headers = new HashMap<>();
 128             headers.put("Content-Type", MediaType.APPLICATION_JSON);
 129             headers.put("Accept", MediaType.APPLICATION_JSON);
 130             HttpResponse httpResponse;
 131             CloseableHttpClient httpClient = null;
 132             try {
 133                 httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
 134                 httpResponse = HttpsUtils
 135                         .put(url, 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                 closeHttpClient(httpClient);
 142             }
 143             if (httpResponse != null) {
 144                 suc = httpResponse.getStatusLine().getStatusCode() == 200;
 145             }
 146             if (!suc) {
 147                 break;
 148             }
 149         }
 150         return suc;
 151     }
 152
 153     private void deleteAllCorrelationRules(List<RuleResult4API> ruleResult4APIs){
 154         ruleResult4APIs.forEach(correlationRule ->{
 155             HashMap<String, String> headers = new HashMap<>();
 156             headers.put("Content-Type", MediaType.APPLICATION_JSON);
 157             CloseableHttpClient httpClient = null;
 158             try {
 159                 httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
 160                 HttpsUtils.delete(url + "/" + correlationRule.getRuleId(), headers, httpClient);
 161             } catch (Exception e) {
 162                 log.warn("Failed to delete rule, the rule id is : " + correlationRule.getRuleId()
 163                         + " exception messge is : " + e.getMessage(), e);
 164             } finally {
 165                 closeHttpClient(httpClient);
 166             }
 167         });
 168     }
 169
 170     private RuleCreateRequest getRuleCreateRequest(Rule rule) {
 171         RuleCreateRequest ruleCreateRequest = new RuleCreateRequest();
 172         ruleCreateRequest.setLoopControlName(rule.getLoopControlName());
 173         ruleCreateRequest.setRuleName(rule.getName());
 174         ruleCreateRequest.setContent(rule.getContents());
 175         ruleCreateRequest.setDescription("");
 176         ruleCreateRequest.setEnabled(1);
 177         return ruleCreateRequest;
 178     }
 179
 180     private void closeHttpClient(CloseableHttpClient httpClient) {
 181         if (httpClient != null) {
 182             try {
 183                 httpClient.close();
 184             } catch (IOException e) {
 185                 log.warn("Failed to close http client!");
 186             }
 187         }
 188     }
 189 }