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/*
* ============LICENSE_START=======================================================
* ONAP : DATALAKE
* ================================================================================
* Copyright 2019 China Mobile
*=================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.datalake.feeder.service;
import java.io.IOException;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpHost;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.indices.CreateIndexRequest;
import org.elasticsearch.client.indices.CreateIndexResponse;
import org.elasticsearch.client.indices.GetIndexRequest;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.rest.RestStatus;
import org.json.JSONObject;
import org.onap.datalake.feeder.config.ApplicationConfiguration;
import org.onap.datalake.feeder.domain.Db;
import org.onap.datalake.feeder.dto.TopicConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
* Elasticsearch Service for table creation, data submission, as well as data pre-processing.
*
* @author Guobiao Mo
*
*/
@Service
public class ElasticsearchService {
private final Logger log = LoggerFactory.getLogger(this.getClass());
@Autowired
private ApplicationConfiguration config;
@Autowired
private DbService dbService;
private RestHighLevelClient client;
ActionListener<BulkResponse> listener;
//ES Encrypted communication https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/_encrypted_communication.html#_encrypted_communication
//Basic authentication https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/_basic_authentication.html
@PostConstruct
private void init() {
Db elasticsearch = dbService.getElasticsearch();
String elasticsearchHost = elasticsearch.getHost();
// Initialize the Connection
client = new RestHighLevelClient(RestClient.builder(new HttpHost(elasticsearchHost, 9200, "http"), new HttpHost(elasticsearchHost, 9201, "http")));
log.info("Connected to Elasticsearch Host {}", elasticsearchHost);
listener = new ActionListener<BulkResponse>() {
@Override
public void onResponse(BulkResponse bulkResponse) {
}
@Override
public void onFailure(Exception e) {
log.error(e.getMessage());
}
};
}
@PreDestroy
public void cleanUp() throws IOException {
client.close();
}
public void ensureTableExist(String topic) throws IOException {
String topicLower = topic.toLowerCase();
GetIndexRequest request = new GetIndexRequest(topicLower);
boolean exists = client.indices().exists(request, RequestOptions.DEFAULT);
if (!exists) {
//TODO submit mapping template
CreateIndexRequest createIndexRequest = new CreateIndexRequest(topicLower);
CreateIndexResponse createIndexResponse = client.indices().create(createIndexRequest, RequestOptions.DEFAULT);
log.info("{} : created {}", createIndexResponse.index(), createIndexResponse.isAcknowledged());
}
}
//TTL is not supported in Elasticsearch 5.0 and later, what can we do? FIXME
public void saveJsons(TopicConfig topic, List<JSONObject> jsons) {
BulkRequest request = new BulkRequest();
for (JSONObject json : jsons) {
if (topic.isCorrelateClearedMessage()) {
boolean found = correlateClearedMessage(topic, json);
if (found) {
continue;
}
}
String id = topic.getMessageId(json); //id can be null
request.add(new IndexRequest(topic.getName().toLowerCase(), config.getElasticsearchType(), id).source(json.toString(), XContentType.JSON));
}
log.debug("saving text to topic = {}, batch count = {} ", topic, jsons.size());
if (config.isAsync()) {
client.bulkAsync(request, RequestOptions.DEFAULT, listener);
} else {
try {
client.bulk(request, RequestOptions.DEFAULT);
} catch (IOException e) {
log.error(topic.getName(), e);
}
}
}
/**
*
* @param topic
* @param json
* @return boolean
*
* Because of query by id, The search API cannot be used for query. The
* search API can only query all data or based on the fields in the
* source. So use the get API, three parameters: index, type, document
* id
*/
private boolean correlateClearedMessage(TopicConfig topic, JSONObject json) {
boolean found = false;
String eName = null;
try {
eName = json.query("/event/commonEventHeader/eventName").toString();
if (StringUtils.isNotBlank(eName) && eName.endsWith("Cleared")) {
String name = eName.substring(0, eName.length() - 7);
String reportingEntityName = json.query("/event/commonEventHeader/reportingEntityName").toString();
String specificProblem = json.query("/event/faultFields/specificProblem").toString();
String id = String.join("^", name, reportingEntityName, specificProblem);//example: id = "aaaa^cccc^bbbbb"
String index = topic.getName().toLowerCase();
//get
GetRequest getRequest = new GetRequest(index, config.getElasticsearchType(), id);
GetResponse getResponse = null;
try {
getResponse = client.get(getRequest, RequestOptions.DEFAULT);
if (getResponse != null) {
if (getResponse.isExists()) {
String sourceAsString = getResponse.getSourceAsString();
JSONObject jsonObject = new JSONObject(sourceAsString);
jsonObject.getJSONObject("event").getJSONObject("faultFields").put("vfStatus", "closed");
String jsonString = jsonObject.toString();
//update
IndexRequest request = new IndexRequest(index, config.getElasticsearchType(), id);
request.source(jsonString, XContentType.JSON);
IndexResponse indexResponse = null;
try {
indexResponse = client.index(request, RequestOptions.DEFAULT);
found = true;
} catch (IOException e) {
log.error("save failure");
}
} else {
log.error("The getResponse was not exists");
}
} else {
log.error("The document for this id was not found");
}
} catch (ElasticsearchException e) {
if (e.status() == RestStatus.NOT_FOUND) {
log.error("The document for this id was not found");
}
if (e.status() == RestStatus.CONFLICT) {
log.error("Version conflict");
}
log.error("Get document exception", e);
} catch (IOException e) {
log.error(topic.getName(), e);
}
}
} catch (Exception e) {
log.error("error", e);
}
return found;
}
}
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