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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* Copyright © 2017-2018 Amdocs
* ================================================================================
* 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.aai.sa.searchdbabstraction.util;
import com.jayway.jsonpath.DocumentContext;
import com.jayway.jsonpath.JsonPath;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import org.apache.commons.io.IOUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.onap.aai.cl.api.Logger;
import org.onap.aai.cl.eelf.LoggerFactory;
import org.onap.aai.sa.searchdbabstraction.logging.SearchDbMsgs;
/**
* This class as the name suggests is to translate the payload of PUT & POST requests to ElasticSearch (ES) to its
* compatible syntax, specially compatible with ES v6 or above.
*
* For example, data type such as "string" is now replaced by "text" or "keyword".
*
* So this class will make those translations reading off from a json configuration file, therefore the configuration
* can be updated with new translations as and when required without touching the code.
*
* @author EDWINL
*
*/
public class ElasticSearchPayloadTranslator {
private static Logger logger =
LoggerFactory.getInstance().getLogger(ElasticSearchPayloadTranslator.class.getName());
private static final String CONFIG_DIRECTORY = System.getProperty("CONFIG_HOME");
private static final String ES_PAYLOAD_TRANSLATION_FILE = "es-payload-translation.json";
private ElasticSearchPayloadTranslator() { // Do not instantiate
}
/**
* Using JSON Path query to filter objects to translate the payload to ES compatible version The filter queries and
* the replacement attributes are configured in the es-payload-translation.json file.
*
* @param source
* @return translated payload in String
* @throws IOException
*/
public static String translateESPayload(String source) throws IOException {
logger.info(SearchDbMsgs.PROCESS_PAYLOAD_QUERY, "translateESPayload, method-params[ source=" + source + "]",
"(unknown)");
String pathToTranslationFile = CONFIG_DIRECTORY + File.separator + ES_PAYLOAD_TRANSLATION_FILE;
try {
JSONObject translationConfigPayload =
new JSONObject(IOUtils.toString(new FileInputStream(new File(pathToTranslationFile)), "UTF-8"));
JSONArray attrTranslations = translationConfigPayload.getJSONArray("attr-translations");
DocumentContext payloadToTranslate = JsonPath.parse(source);
for (Object obj : attrTranslations) {
JSONObject jsonObj = ((JSONObject) obj);
String query = jsonObj.get("query").toString();
JSONObject attrToUpdate = (JSONObject) jsonObj.get("update");
List<Map<String, Object>> filteredObjects = payloadToTranslate.read(query);
for (Map<String, Object> objMap : filteredObjects) {
objMap.putAll(attrToUpdate.toMap());
}
}
logger.info(SearchDbMsgs.PROCESS_PAYLOAD_QUERY,
"Payload after translation: " + payloadToTranslate.jsonString());
return payloadToTranslate.jsonString();
} catch (JSONException ex) {
logger.error(SearchDbMsgs.FILTERS_CONFIG_FAILURE, ex, ES_PAYLOAD_TRANSLATION_FILE, ex.getMessage());
throw new IOException("Payload translation configuration looks corrupted. Please correct!", ex);
} catch (IOException ex) {
logger.error(SearchDbMsgs.FILTERS_CONFIG_FAILURE, ex, ES_PAYLOAD_TRANSLATION_FILE, ex.getMessage());
throw new IOException("Error in configuring payload translation file. Please check if it exists.", ex);
}
}
}
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