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.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
  25 import java.io.IOException;
  26 import java.io.UnsupportedEncodingException;
  27 import java.lang.reflect.Type;
  28 import java.util.HashMap;
  29 import java.util.List;
  30 import javax.ws.rs.core.MediaType;
  31
  32 import lombok.extern.slf4j.Slf4j;
  33 import org.apache.http.HttpResponse;
  34 import org.apache.http.client.methods.HttpDelete;
  35 import org.apache.http.client.methods.HttpGet;
  36 import org.apache.http.client.methods.HttpPut;
  37 import org.apache.http.entity.StringEntity;
  38 import org.apache.http.impl.client.CloseableHttpClient;
  39 import org.onap.holmes.common.dcae.DcaeConfigurationQuery;
  40 import org.onap.holmes.common.dcae.entity.DcaeConfigurations;
  41 import org.onap.holmes.common.dcae.entity.Rule;
  42 import org.onap.holmes.common.exception.CorrelationException;
  43 import org.onap.holmes.common.utils.GsonUtil;
  44 import org.onap.holmes.common.utils.HttpsUtils;
  45 import org.onap.holmes.common.utils.Md5Util;
  46 import org.onap.holmes.rulemgt.bean.request.RuleCreateRequest;
  47 import org.onap.holmes.rulemgt.bean.response.RuleQueryListResponse;
  48 import org.onap.holmes.rulemgt.bean.response.RuleResult4API;
  49
  50 @Slf4j
  51 public class DcaeConfigurationPolling implements Runnable {
  52
  53     public static final long POLLING_PERIOD = 30 * 1000L;
  54
  55     private String hostname;
  56
  57     private String url = "https://127.0.0.1:9101/api/holmes-rule-mgmt/v1/rule";
  58
  59     public DcaeConfigurationPolling(String hostname) {
  60         this.hostname = hostname;
  61     }
  62
  63     private String prevConfigMd5 = Md5Util.md5(null);
  64
  65     private boolean prevResult = false;
  66
  67     @Override
  68     public void run() {
  69         DcaeConfigurations dcaeConfigurations = null;
  70         try {
  71             dcaeConfigurations = DcaeConfigurationQuery.getDcaeConfigurations(hostname);
  72             String md5 = Md5Util.md5(dcaeConfigurations);
  73             if (prevResult && prevConfigMd5.equals(md5)) {
  74                 log.info("Operation aborted due to identical configurations.");
  75                 return;
  76             }
  77             prevConfigMd5 = md5;
  78             prevResult = false;
  79         } catch (CorrelationException e) {
  80             log.error("Failed to fetch DCAE configurations. " + e.getMessage(), e);
  81         } catch (Exception e) {
  82             log.info("Failed to generate the MD5 information for new configurations.", e);
  83         }
  84         RuleQueryListResponse ruleQueryListResponse = null;
  85         if (dcaeConfigurations != null) {
  86             try {
  87                 ruleQueryListResponse = getAllCorrelationRules();
  88             } catch (CorrelationException e) {
  89                 log.error("Failed to get right response!" + e.getMessage(), e);
  90             } catch (IOException e) {
  91                 log.error("Failed to extract response entity. " + e.getMessage(), e);
  92             } catch (Exception e) {
  93                 log.error("Failed to build http client. " + e.getMessage(), e);
  94             }
  95         }
  96         if (ruleQueryListResponse != null) {
  97             List<RuleResult4API> ruleResult4APIs = ruleQueryListResponse.getCorrelationRules();
  98             deleteAllCorrelationRules(ruleResult4APIs);
  99             try {
 100                 prevResult = addAllCorrelationRules(dcaeConfigurations);
 101             } catch (CorrelationException e) {
 102                 log.error("Failed to add rules. " + e.getMessage(), e);
 103                 prevResult = false;
 104             }
 105         }
 106     }
 107
 108     public RuleQueryListResponse getAllCorrelationRules() throws CorrelationException, IOException {
 109         HashMap<String, String> headers = new HashMap<>();
 110         headers.put("Content-Type", MediaType.APPLICATION_JSON);
 111         CloseableHttpClient httpClient = null;
 112         HttpGet httpGet = new HttpGet(url);
 113         try {
 114             httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
 115             HttpResponse httpResponse = HttpsUtils.get(httpGet, headers, httpClient);
 116             String response = HttpsUtils.extractResponseEntity(httpResponse);
 117             return JSON.parseObject(response, RuleQueryListResponse.class);
 118         } finally {
 119             httpGet.releaseConnection();
 120             closeHttpClient(httpClient);
 121         }
 122     }
 123
 124     private boolean addAllCorrelationRules(DcaeConfigurations dcaeConfigurations) throws CorrelationException {
 125         boolean suc = false;
 126         for (Rule rule : dcaeConfigurations.getDefaultRules()) {
 127             RuleCreateRequest ruleCreateRequest = getRuleCreateRequest(rule);
 128             String content = "";
 129             try {
 130                 content = GsonUtil.beanToJson(ruleCreateRequest);
 131             } catch (Exception e) {
 132                 throw new CorrelationException("Failed to convert the message object to a json string.", e);
 133             }
 134             HashMap<String, String> headers = new HashMap<>();
 135             headers.put("Content-Type", MediaType.APPLICATION_JSON);
 136             headers.put("Accept", MediaType.APPLICATION_JSON);
 137             HttpResponse httpResponse;
 138             CloseableHttpClient httpClient = null;
 139             HttpPut httpPut = new HttpPut(url);
 140             try {
 141                 httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
 142                 httpResponse = HttpsUtils
 143                         .put(httpPut, headers, new HashMap<>(), new StringEntity(content), httpClient);
 144             } catch (UnsupportedEncodingException e) {
 145                 throw new CorrelationException("Failed to create https entity.", e);
 146             } catch (Exception e) {
 147                 throw new CorrelationException(e.getMessage());
 148             } finally {
 149                 httpPut.releaseConnection();
 150                 closeHttpClient(httpClient);
 151             }
 152             if (httpResponse != null) {
 153                 suc = httpResponse.getStatusLine().getStatusCode() == 200;
 154             }
 155             if (!suc) {
 156                 break;
 157             }
 158         }
 159         return suc;
 160     }
 161
 162     private void deleteAllCorrelationRules(List<RuleResult4API> ruleResult4APIs) {
 163         ruleResult4APIs.forEach(correlationRule -> {
 164             HashMap<String, String> headers = new HashMap<>();
 165             headers.put("Content-Type", MediaType.APPLICATION_JSON);
 166             CloseableHttpClient httpClient = null;
 167             HttpDelete httpDelete = new HttpDelete(url + "/" + correlationRule.getRuleId());
 168             try {
 169                 httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
 170                 HttpsUtils.delete(httpDelete, headers, httpClient);
 171             } catch (Exception e) {
 172                 log.warn("Failed to delete rule, the rule id is : " + correlationRule.getRuleId()
 173                         + " exception messge is : " + e.getMessage(), e);
 174             } finally {
 175                 httpDelete.releaseConnection();
 176                 closeHttpClient(httpClient);
 177             }
 178         });
 179     }
 180
 181     private RuleCreateRequest getRuleCreateRequest(Rule rule) {
 182         RuleCreateRequest ruleCreateRequest = new RuleCreateRequest();
 183         ruleCreateRequest.setLoopControlName(rule.getLoopControlName());
 184         ruleCreateRequest.setRuleName(rule.getName());
 185         ruleCreateRequest.setContent(rule.getContents());
 186         ruleCreateRequest.setDescription("");
 187         ruleCreateRequest.setEnabled(1);
 188         return ruleCreateRequest;
 189     }
 190
 191     private void closeHttpClient(CloseableHttpClient httpClient) {
 192         if (httpClient != null) {
 193             try {
 194                 httpClient.close();
 195             } catch (IOException e) {
 196                 log.warn("Failed to close http client!");
 197             }
 198         }
 199     }
 200 }