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/*
* ============LICENSE_START=======================================================
* ONAP : DCAE
* ================================================================================
* Copyright 2018 TechMahindra
*=================================================================================
* 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.universalvesadapter.adapter;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.annotation.PreDestroy;
import org.milyn.Smooks;
import org.onap.dcaegen2.ves.domain.VesEvent;
import org.onap.universalvesadapter.exception.ConfigFileSmooksConversionException;
import org.onap.universalvesadapter.exception.VesException;
import org.onap.universalvesadapter.service.VESAdapterInitializer;
import org.onap.universalvesadapter.utils.SmooksUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.xml.sax.SAXException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonSyntaxException;
/**
* Default implementation of the Generic Adapter
*
* @author kmalbari
*
*/
@Component
public class UniversalEventAdapter implements GenericAdapter {
private final Logger LOGGER = LoggerFactory.getLogger(this.getClass());
private String enterpriseId;
@Value("${defaultMappingFileName}")
private String defaulMappingFileName;
private Map<String, Smooks> eventToSmooksMapping = new ConcurrentHashMap<>();
public UniversalEventAdapter() {
}
/**
* transforms JSON to VES format and and returns the ves Event
*
* @param IncomingJason,eventType
* @return ves Event
*/
@Override
public String transform(String incomingJsonString, String eventType)
throws ConfigFileSmooksConversionException, VesException {
String result = "";
String configFileData;
try {
Gson gson = new Gson();
JsonObject body = gson.fromJson(incomingJsonString, JsonObject.class);
JsonElement results = body.get("notify OID");
String notifyOid = results.getAsString();
// extracting enterprise id from notify OID of SNMP trap.
enterpriseId = notifyOid.substring(0, notifyOid.length() - 4);
if (VESAdapterInitializer.getMappingFiles().containsKey(enterpriseId)) {
configFileData = VESAdapterInitializer.getMappingFiles().get(enterpriseId);
LOGGER.debug("Using Mapping file as Mapping file is not available for Enterprise Id:{}",enterpriseId);
} else {
configFileData = VESAdapterInitializer.getMappingFiles().get(defaulMappingFileName);
LOGGER.debug("Using Default Mapping file as Mapping file is not available for Enterprise Id:{}",enterpriseId);
}
Smooks smooksTemp = new Smooks(new ByteArrayInputStream(configFileData.getBytes(StandardCharsets.UTF_8)));
eventToSmooksMapping.put(eventType, smooksTemp);
VesEvent vesEvent = SmooksUtils.getTransformedObjectForInput(smooksTemp,incomingJsonString);
LOGGER.debug("Incoming json transformed to VES format successfully");
ObjectMapper objectMapper = new ObjectMapper();
result = objectMapper.writeValueAsString(vesEvent);
LOGGER.debug("Serialized VES json");
} catch (JsonProcessingException exception) {
throw new VesException("Unable to convert pojo to VES format, Reason :{}", exception);
} catch (SAXException | IOException exception) {
//Invalid Mapping file
LOGGER.error("Dropping this Trap :{},due to error Occured :Reason:", incomingJsonString, exception);
} catch (JsonSyntaxException exception) {
// Invalid Trap
LOGGER.error("Dropping this Invalid json Trap :{}, Reason:", incomingJsonString, exception);
}catch (JsonParseException exception) {
// Invalid Trap
LOGGER.error("Dropping this Invalid json Trap :{}, Reason:", incomingJsonString, exception);
}
catch (RuntimeException exception) {
LOGGER.error("Dropping this Trap :{},Reason:", incomingJsonString, exception);
}
return result;
}
/**
* Closes all open smooks' instances before bean is destroyed
*/
@PreDestroy
public void destroy() {
for (Smooks smooks : eventToSmooksMapping.values())
smooks.close();
LOGGER.debug("All Smooks objects closed");
}
}
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