/
ElasticClient.java
executable file
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/
ElasticClient.java
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package iudx.resource.server.database.archives.elastic;
import static iudx.resource.server.database.archives.Constants.BAD_PARAMETERS;
import static iudx.resource.server.database.archives.Constants.COUNT;
import static iudx.resource.server.database.archives.Constants.DB_ERROR_2XX;
import static iudx.resource.server.database.archives.Constants.DOCS_KEY;
import static iudx.resource.server.database.archives.Constants.EMPTY_RESPONSE;
import static iudx.resource.server.database.archives.Constants.FAILED;
import static iudx.resource.server.database.archives.Constants.FILTER_PATH;
import static iudx.resource.server.database.archives.Constants.HITS;
import static iudx.resource.server.database.archives.Constants.REQUEST_GET;
import static iudx.resource.server.database.archives.Constants.SOURCE_FILTER_KEY;
import static iudx.resource.server.database.archives.Constants.SUCCESS;
import java.io.IOException;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.util.EntityUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.elasticsearch.client.Request;
import org.elasticsearch.client.Response;
import org.elasticsearch.client.ResponseListener;
import org.elasticsearch.client.RestClient;
import io.vertx.core.AsyncResult;
import io.vertx.core.Future;
import io.vertx.core.Handler;
import io.vertx.core.json.DecodeException;
import io.vertx.core.json.JsonArray;
import io.vertx.core.json.JsonObject;
import iudx.resource.server.database.archives.ResponseBuilder;
public class ElasticClient {
private final RestClient client;
private ResponseBuilder responseBuilder;
private static final Logger LOGGER = LogManager.getLogger(ElasticClient.class);
/**
* ElasticClient - Elastic Low level wrapper.
*
* @param databaseIP IP of the ElasticDB
* @param databasePort Port of the ElasticDB
*/
public ElasticClient(String databaseIP, int databasePort, String user, String password) {
CredentialsProvider credentials = new BasicCredentialsProvider();
credentials.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(user, password));
client = RestClient.builder(new HttpHost(databaseIP, databasePort)).setHttpClientConfigCallback(
httpClientBuilder -> httpClientBuilder.setDefaultCredentialsProvider(credentials)).build();
}
/**
* searchAsync - Wrapper around elasticsearch async search requests.
*
* @param index Index to search on
* @param query Query
* @param searchHandler JsonObject result {@link AsyncResult}
*/
public ElasticClient searchAsync(String index, String filterPathValue, String query,
Handler<AsyncResult<JsonObject>> searchHandler) {
Request queryRequest = new Request(REQUEST_GET, index);
queryRequest.addParameter(FILTER_PATH, filterPathValue);
queryRequest.setJsonEntity(query);
client.performRequestAsync(queryRequest, new ResponseListener() {
@Override
public void onSuccess(Response response) {
JsonArray dbResponse = new JsonArray();
JsonObject jsonTemp;
try {
JsonObject responseJson = new JsonObject(EntityUtils.toString(response.getEntity()));
if (!responseJson.containsKey(HITS) && !responseJson.containsKey(DOCS_KEY)) {
responseBuilder =
new ResponseBuilder(FAILED).setTypeAndTitle(204).setMessage(EMPTY_RESPONSE);
searchHandler.handle(Future.failedFuture(responseBuilder.getResponse().toString()));
return;
}
responseBuilder = new ResponseBuilder(SUCCESS).setTypeAndTitle(200);
JsonArray responseHits = new JsonArray();
if (responseJson.containsKey(HITS)) {
responseHits = responseJson.getJsonObject(HITS).getJsonArray(HITS);
} else if (responseJson.containsKey(DOCS_KEY)) {
responseHits = responseJson.getJsonArray(DOCS_KEY);
}
for (Object json : responseHits) {
jsonTemp = (JsonObject) json;
dbResponse.add(jsonTemp.getJsonObject(SOURCE_FILTER_KEY));
}
responseBuilder.setMessage(dbResponse);
searchHandler.handle(Future.succeededFuture(responseBuilder.getResponse()));
} catch (IOException e) {
LOGGER.error("IO Execption from Database: " + e.getMessage());
JsonObject ioError = new JsonObject(e.getMessage());
responseBuilder = new ResponseBuilder(FAILED).setTypeAndTitle(400).setMessage(ioError);
searchHandler.handle(Future.failedFuture(responseBuilder.getResponse().toString()));
}
}
@Override
public void onFailure(Exception e) {
LOGGER.error(e.getLocalizedMessage());
try {
String error = e.getMessage().substring(e.getMessage().indexOf("{"),
e.getMessage().lastIndexOf("}") + 1);
JsonObject dbError = new JsonObject(error);
responseBuilder = new ResponseBuilder(FAILED).setTypeAndTitle(400).setMessage(dbError);
searchHandler.handle(Future.failedFuture(responseBuilder.getResponse().toString()));
} catch (DecodeException jsonError) {
LOGGER.error("Json parsing exception: " , jsonError);
responseBuilder = new ResponseBuilder(FAILED).setTypeAndTitle(400)
.setMessage(BAD_PARAMETERS);
searchHandler.handle(Future.failedFuture(responseBuilder.getResponse().toString()));
}
}
});
return this;
}
/**
* countAsync - Wrapper around elasticsearch async count requests.
*
* @param index Index to search on
* @param query Query
* @param countHandler JsonObject result {@link AsyncResult}
*/
public ElasticClient countAsync(String index, String query,
Handler<AsyncResult<JsonObject>> countHandler) {
Request queryRequest = new Request(REQUEST_GET, index);
queryRequest.setJsonEntity(query);
client.performRequestAsync(queryRequest, new ResponseListener() {
@Override
public void onSuccess(Response response) {
try {
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode != 200 && statusCode != 204) {
countHandler.handle(Future.failedFuture(DB_ERROR_2XX));
responseBuilder =
new ResponseBuilder(FAILED).setTypeAndTitle(400).setMessage(DB_ERROR_2XX);
countHandler.handle(Future.failedFuture(responseBuilder.getResponse().toString()));
return;
}
JsonObject responseJson = new JsonObject(EntityUtils.toString(response.getEntity()));
if (responseJson.getInteger(COUNT) == 0) {
responseBuilder =
new ResponseBuilder(FAILED).setTypeAndTitle(204).setMessage(EMPTY_RESPONSE);
countHandler.handle(Future.failedFuture(responseBuilder.getResponse().toString()));
return;
}
responseBuilder =
new ResponseBuilder(SUCCESS).setTypeAndTitle(200)
.setCount(responseJson.getInteger(COUNT));
countHandler.handle(Future.succeededFuture(responseBuilder.getResponse()));
} catch (IOException e) {
LOGGER.error("IO Execption from Database: " , e.getMessage());
JsonObject ioError = new JsonObject(e.getMessage());
responseBuilder = new ResponseBuilder(FAILED).setTypeAndTitle(400).setMessage(ioError);
countHandler.handle(Future.failedFuture(responseBuilder.getResponse().toString()));
}
}
@Override
public void onFailure(Exception e) {
LOGGER.error(e.getLocalizedMessage());
try {
String error = e.getMessage().substring(e.getMessage().indexOf("{"),
e.getMessage().lastIndexOf("}") + 1);
JsonObject dbError = new JsonObject(error);
responseBuilder = new ResponseBuilder(FAILED).setTypeAndTitle(400).setMessage(dbError);
countHandler.handle(Future.failedFuture(responseBuilder.getResponse().toString()));
} catch (DecodeException jsonError) {
LOGGER.error("Json parsing exception: " , jsonError);
responseBuilder = new ResponseBuilder(FAILED).setTypeAndTitle(400)
.setMessage(BAD_PARAMETERS);
countHandler.handle(Future.failedFuture(responseBuilder.getResponse().toString()));
}
}
});
return this;
}
}