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/**
* Copyright 2017 ZTE Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package org.onap.holmes.rulemgt.dcae;
import com.alibaba.fastjson.JSON;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.reflect.TypeToken;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.List;
import javax.ws.rs.core.MediaType;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.onap.holmes.common.dcae.DcaeConfigurationQuery;
import org.onap.holmes.common.dcae.entity.DcaeConfigurations;
import org.onap.holmes.common.dcae.entity.Rule;
import org.onap.holmes.common.exception.CorrelationException;
import org.onap.holmes.common.utils.GsonUtil;
import org.onap.holmes.common.utils.HttpsUtils;
import org.onap.holmes.common.utils.Md5Util;
import org.onap.holmes.rulemgt.bean.request.RuleCreateRequest;
import org.onap.holmes.rulemgt.bean.response.RuleQueryListResponse;
import org.onap.holmes.rulemgt.bean.response.RuleResult4API;
@Slf4j
public class DcaeConfigurationPolling implements Runnable {
public static final long POLLING_PERIOD = 30 * 1000L;
private String hostname;
private String url = "https://127.0.0.1:9101/api/holmes-rule-mgmt/v1/rule";
public DcaeConfigurationPolling(String hostname) {
this.hostname = hostname;
}
private String prevConfigMd5 = Md5Util.md5(null);
private boolean prevResult = false;
@Override
public void run() {
DcaeConfigurations dcaeConfigurations = null;
try {
dcaeConfigurations = DcaeConfigurationQuery.getDcaeConfigurations(hostname);
String md5 = Md5Util.md5(dcaeConfigurations);
if (prevResult && prevConfigMd5.equals(md5)){
log.info("Operation aborted due to identical Configurations.");
return;
}
prevConfigMd5 = md5;
prevResult = false;
} catch (CorrelationException e) {
log.error("Failed to fetch DCAE configurations. " + e.getMessage(), e);
} catch (Exception e) {
log.info("Failed to generate the MD5 information for new configurations.", e);
}
RuleQueryListResponse ruleQueryListResponse = null;
if (dcaeConfigurations != null) {
try {
ruleQueryListResponse = getAllCorrelationRules();
} catch (CorrelationException e) {
log.error("Failed to get right response!" + e.getMessage(), e);
} catch (IOException e) {
log.error("Failed to extract response entity. " + e.getMessage(), e);
} catch (Exception e) {
log.error("Failed to build http client. " + e.getMessage(), e);
}
}
if (ruleQueryListResponse != null) {
List<RuleResult4API> ruleResult4APIs = ruleQueryListResponse.getCorrelationRules();
deleteAllCorrelationRules(ruleResult4APIs);
try {
prevResult = addAllCorrelationRules(dcaeConfigurations);
} catch (CorrelationException e) {
log.error("Failed to add rules. " + e.getMessage(), e);
prevResult = false;
}
}
}
public RuleQueryListResponse getAllCorrelationRules() throws CorrelationException, IOException {
HashMap<String, String> headers = new HashMap<>();
headers.put("Content-Type", MediaType.APPLICATION_JSON);
CloseableHttpClient httpClient = null;
HttpGet httpGet = new HttpGet(url);
try {
httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
HttpResponse httpResponse = HttpsUtils.get(httpGet, headers, httpClient);
String response = HttpsUtils.extractResponseEntity(httpResponse);
return JSON.parseObject(response,RuleQueryListResponse.class);
} finally {
httpGet.releaseConnection();
closeHttpClient(httpClient);
}
}
private boolean addAllCorrelationRules(DcaeConfigurations dcaeConfigurations) throws CorrelationException {
boolean suc = false;
for (Rule rule : dcaeConfigurations.getDefaultRules()) {
RuleCreateRequest ruleCreateRequest = getRuleCreateRequest(rule);
String content = "";
try {
content = GsonUtil.beanToJson(ruleCreateRequest);
} catch (Exception e) {
throw new CorrelationException("Failed to convert the message object to a json string.", e);
}
HashMap<String, String> headers = new HashMap<>();
headers.put("Content-Type", MediaType.APPLICATION_JSON);
headers.put("Accept", MediaType.APPLICATION_JSON);
HttpResponse httpResponse;
CloseableHttpClient httpClient = null;
HttpPut httpPut = new HttpPut(url);
try {
httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
httpResponse = HttpsUtils
.put(httpPut, headers, new HashMap<>(), new StringEntity(content), httpClient);
} catch (UnsupportedEncodingException e) {
throw new CorrelationException("Failed to create https entity.", e);
} catch (Exception e) {
throw new CorrelationException(e.getMessage());
} finally {
httpPut.releaseConnection();
closeHttpClient(httpClient);
}
if (httpResponse != null) {
suc = httpResponse.getStatusLine().getStatusCode() == 200;
}
if (!suc) {
break;
}
}
return suc;
}
private void deleteAllCorrelationRules(List<RuleResult4API> ruleResult4APIs){
ruleResult4APIs.forEach(correlationRule ->{
HashMap<String, String> headers = new HashMap<>();
headers.put("Content-Type", MediaType.APPLICATION_JSON);
CloseableHttpClient httpClient = null;
HttpDelete httpDelete = new HttpDelete(url + "/" + correlationRule.getRuleId());
try {
httpClient = HttpsUtils.getHttpClient(HttpsUtils.DEFUALT_TIMEOUT);
HttpsUtils.delete(httpDelete, headers, httpClient);
} catch (Exception e) {
log.warn("Failed to delete rule, the rule id is : " + correlationRule.getRuleId()
+ " exception messge is : " + e.getMessage(), e);
} finally {
httpDelete.releaseConnection();
closeHttpClient(httpClient);
}
});
}
private RuleCreateRequest getRuleCreateRequest(Rule rule) {
RuleCreateRequest ruleCreateRequest = new RuleCreateRequest();
ruleCreateRequest.setLoopControlName(rule.getLoopControlName());
ruleCreateRequest.setRuleName(rule.getName());
ruleCreateRequest.setContent(rule.getContents());
ruleCreateRequest.setDescription("");
ruleCreateRequest.setEnabled(1);
return ruleCreateRequest;
}
private void closeHttpClient(CloseableHttpClient httpClient) {
if (httpClient != null) {
try {
httpClient.close();
} catch (IOException e) {
log.warn("Failed to close http client!");
}
}
}
}
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