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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.http.HttpHost;
import org.elasticsearch.action.ActionListener;
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.json.JSONObject;
import org.onap.datalake.feeder.config.ApplicationConfiguration;
import org.onap.datalake.feeder.domain.Db;
import org.onap.datalake.feeder.domain.Topic;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
* Service to use Elasticsearch
*
* @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("Connect 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){
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(Topic topic, List<JSONObject> jsons) {
BulkRequest request = new BulkRequest();
for (JSONObject json : jsons) {
if(topic.isCorrelateClearedMessage()) {
boolean found = correlateClearedMessage(json);
if(found) {
continue;
}
}
String id = topic.getMessageId(json); //id can be null
request.add(new IndexRequest(topic.getName().toLowerCase(), "doc", id).source(json.toString(), XContentType.JSON));
}
if(config.isAsync()) {
client.bulkAsync(request, RequestOptions.DEFAULT, listener);
}else {
try {
client.bulk(request, RequestOptions.DEFAULT);
} catch (IOException e) {
log.error( topic.getName() , e);
}
}
}
private boolean correlateClearedMessage(JSONObject json) {
boolean found = true;
/*TODO
* 1. check if this is a alarm cleared message
* 2. search previous alarm message
* 3. update previous message, if success, set found=true
*/
//for Sonar test, remove the following
if(json.isNull("kkkkk")) {
found = false;
}
return found;
}
}
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