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/*-
* ============LICENSE_START=======================================================
* PROJECT
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.dcae.commonFunction;
import com.att.nsa.clock.SaClock;
import com.att.nsa.logging.LoggingContext;
import com.att.nsa.logging.log4j.EcompFields;
import com.google.common.reflect.TypeToken;
import com.google.gson.Gson;
import io.vavr.collection.Map;
import org.json.JSONObject;
import org.onap.dcae.ApplicationSettings;
import org.onap.dcae.VesApplication;
import org.onap.dcae.commonFunction.event.publishing.EventPublisher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.FileReader;
import java.io.IOException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
public class EventProcessor implements Runnable {
static final Type EVENT_LIST_TYPE = new TypeToken<List<Event>>() {
}.getType();
private static final Logger log = LoggerFactory.getLogger(EventProcessor.class);
private static final String EVENT_LITERAL = "event";
private static final String COMMON_EVENT_HEADER = "commonEventHeader";
private final SimpleDateFormat dateFormat = new SimpleDateFormat("EEE, MM dd yyyy hh:mm:ss z");
public JSONObject event;
private EventPublisher eventPublisher;
private Map<String, String[]> streamidHash;
private ApplicationSettings properties;
public EventProcessor(EventPublisher eventPublisher, ApplicationSettings properties) {
this.eventPublisher = eventPublisher;
this.properties = properties;
this.streamidHash = properties.dMaaPStreamsMapping();
}
@Override
public void run() {
try {
while (true) {
event = VesApplication.fProcessingInputQueue.take();
// As long as the producer is running we remove elements from
// the queue.
log.info("QueueSize:" + VesApplication.fProcessingInputQueue.size() + "\tEventProcessor\tRemoving element: " + event);
String uuid = event.get("VESuniqueId").toString();
LoggingContext localLC = VESLogger.getLoggingContextForThread(uuid);
localLC.put(EcompFields.kBeginTimestampMs, SaClock.now());
String domain = event.getJSONObject(EVENT_LITERAL).getJSONObject(COMMON_EVENT_HEADER).getString("domain");
log.debug("event.VESuniqueId" + event.get("VESuniqueId") + "event.commonEventHeader.domain:" + domain);
streamidHash.get(domain)
.onEmpty(() -> {
log.error("No StreamID defined for publish - Message dropped" + event);
}).forEach(streamIds -> {
sendEventsToStreams(streamIds);
});
log.debug("Message published" + event);
}
} catch (InterruptedException e) {
log.error("EventProcessor InterruptedException" + e.getMessage());
Thread.currentThread().interrupt();
}
}
public void overrideEvent() {
// Set collector timestamp in event payload before publish
addCurrentTimeToEvent(event);
if (properties.eventTransformingEnabled()) {
// read the mapping json file
try (FileReader fr = new FileReader("./etc/eventTransform.json")) {
log.info("parse eventTransform.json");
List<Event> events = new Gson().fromJson(fr, EVENT_LIST_TYPE);
parseEventsJson(events, new ConfigProcessorAdapter(new ConfigProcessors(event)));
} catch (IOException e) {
log.error("Couldn't find file ./etc/eventTransform.json" + e.toString());
}
}
// Remove VESversion from event. This field is for internal use and must be removed after use.
if (event.has("VESversion"))
event.remove("VESversion");
log.debug("Modified event:" + event);
}
private void sendEventsToStreams(String[] streamIdList) {
for (String aStreamIdList : streamIdList) {
log.info("Invoking publisher for streamId:" + aStreamIdList);
this.overrideEvent();
eventPublisher.sendEvent(event, aStreamIdList);
}
}
private void addCurrentTimeToEvent(JSONObject event) {
final Date currentTime = new Date();
JSONObject collectorTimeStamp = new JSONObject().put("collectorTimeStamp", dateFormat.format(currentTime));
JSONObject commonEventHeaderkey = event.getJSONObject(EVENT_LITERAL).getJSONObject(COMMON_EVENT_HEADER);
commonEventHeaderkey.put("internalHeaderFields", collectorTimeStamp);
event.getJSONObject(EVENT_LITERAL).put(COMMON_EVENT_HEADER, commonEventHeaderkey);
}
void parseEventsJson(List<Event> eventsTransform, ConfigProcessorAdapter configProcessorAdapter) {
// load VESProcessors class at runtime
for (Event eventTransform : eventsTransform) {
JSONObject filterObj = new JSONObject(eventTransform.filter.toString());
if (configProcessorAdapter.isFilterMet(filterObj)) {
callProcessorsMethod(configProcessorAdapter, eventTransform.processors);
}
}
}
private void callProcessorsMethod(ConfigProcessorAdapter configProcessorAdapter, List<Processor> processors) {
// call the processor method
for (Processor processor : processors) {
final String functionName = processor.functionName;
final JSONObject args = new JSONObject(processor.args.toString());
log.info(String.format("functionName==%s | args==%s", functionName, args));
// reflect method call
try {
configProcessorAdapter.runConfigProcessorFunctionByName(functionName, args);
} catch (ReflectiveOperationException e) {
log.error("EventProcessor Exception" + e.getMessage() + e + e.getCause());
}
}
}
static class ConfigProcessorAdapter {
private final ConfigProcessors configProcessors;
ConfigProcessorAdapter(ConfigProcessors configProcessors) {
this.configProcessors = configProcessors;
}
boolean isFilterMet(JSONObject parameter) {
return configProcessors.isFilterMet(parameter);
}
void runConfigProcessorFunctionByName(String functionName, JSONObject parameter) throws ReflectiveOperationException {
Method method = configProcessors.getClass().getDeclaredMethod(functionName, parameter.getClass());
method.invoke(configProcessors, parameter);
}
}
}
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