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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.dcaegen2.services.pmmapper;
import io.undertow.Handlers;
import io.undertow.Undertow;
import io.undertow.util.StatusCodes;
import lombok.NonNull;
import org.onap.dcaegen2.services.pmmapper.config.ConfigHandler;
import org.onap.dcaegen2.services.pmmapper.datarouter.DataRouterSubscriber;
import org.onap.dcaegen2.services.pmmapper.exceptions.CBSConfigException;
import org.onap.dcaegen2.services.pmmapper.exceptions.CBSServerError;
import org.onap.dcaegen2.services.pmmapper.exceptions.EnvironmentConfigException;
import org.onap.dcaegen2.services.pmmapper.exceptions.MapperConfigException;
import org.onap.dcaegen2.services.pmmapper.exceptions.TooManyTriesException;
import org.onap.dcaegen2.services.pmmapper.mapping.Mapper;
import org.onap.dcaegen2.services.pmmapper.model.Event;
import org.onap.dcaegen2.services.pmmapper.model.MapperConfig;
import org.onap.dcaegen2.services.pmmapper.healthcheck.HealthCheckHandler;
import org.onap.dcaegen2.services.pmmapper.utils.XMLValidator;
import org.onap.logging.ref.slf4j.ONAPLogAdapter;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import reactor.core.publisher.Flux;
import reactor.core.publisher.FluxSink;
import reactor.core.scheduler.Schedulers;
import java.nio.file.Path;
import java.nio.file.Paths;
public class App {
private static final ONAPLogAdapter logger = new ONAPLogAdapter(LoggerFactory.getLogger(App.class));
private static Path mappingTemplate = Paths.get("/opt/app/pm-mapper/etc/mapping.ftl");
private static Path xmlSchema = Paths.get("/opt/app/pm-mapper/etc/measCollec_plusString.xsd");
private static FluxSink<Event> fluxSink;
public static void main(String[] args) throws InterruptedException, TooManyTriesException, CBSConfigException, EnvironmentConfigException, CBSServerError, MapperConfigException {
Flux<Event> flux = Flux.create(eventFluxSink -> fluxSink = eventFluxSink);
HealthCheckHandler healthCheckHandler = new HealthCheckHandler();
Mapper mapper = new Mapper(mappingTemplate);
XMLValidator validator = new XMLValidator(xmlSchema);
flux.onBackpressureDrop(App::handleBackPressure)
.doOnNext(App::receiveRequest)
.limitRate(1)
.parallel()
.runOn(Schedulers.newParallel(""), 1)
.doOnNext(event -> MDC.setContextMap(event.getMdc()))
.filter(validator::validate)
.map(mapper::map)
.subscribe(event -> logger.unwrap().info("Event Processed"));
DataRouterSubscriber dataRouterSubscriber = new DataRouterSubscriber(fluxSink::next);
MapperConfig mapperConfig = new ConfigHandler().getMapperConfig();
dataRouterSubscriber.start(mapperConfig);
Undertow.builder()
.addHttpListener(8081, "0.0.0.0")
.setHandler(Handlers.routing().add("put", "/delivery", dataRouterSubscriber)
.add("get", "/healthcheck", healthCheckHandler))
.build().start();
}
/**
* Takes the exchange from an event, responds with a 429 and un-dispatches the exchange.
* @param event to be ignored.
*/
public static void handleBackPressure(@NonNull Event event) {
logger.unwrap().debug("Event will not be processed, responding with 429");
event.getHttpServerExchange()
.setStatusCode(StatusCodes.TOO_MANY_REQUESTS)
.getResponseSender()
.send(StatusCodes.TOO_MANY_REQUESTS_STRING);
event.getHttpServerExchange()
.unDispatch();
}
/**
* Takes the exchange from an event, responds with a 200 and un-dispatches the exchange.
* @param event to be received.
*/
public static void receiveRequest(@NonNull Event event) {
logger.unwrap().debug("Event will be processed, responding with 200");
event.getHttpServerExchange()
.setStatusCode(StatusCodes.OK)
.getResponseSender()
.send(StatusCodes.OK_STRING);
event.getHttpServerExchange()
.unDispatch();
}
}
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