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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
* Copyright (C) 2020 Nokia. 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.dcaegen2.collectors.datafile.tasks;
import com.google.gson.JsonElement;
import org.onap.dcaegen2.collectors.datafile.configuration.AppConfig;
import org.onap.dcaegen2.collectors.datafile.configuration.ConsumerConfiguration;
import org.onap.dcaegen2.collectors.datafile.model.FileReadyMessage;
import org.onap.dcaegen2.collectors.datafile.service.JsonMessageParser;
import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.api.MessageRouterSubscriber;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactor.core.publisher.Flux;
/**
* Component used to get messages from the MessageRouter.
*
* @author <a href="mailto:henrik.b.andersson@est.tech">Henrik Andersson</a>
*/
public class DMaaPMessageConsumer {
private static final Logger logger = LoggerFactory.getLogger(DMaaPMessageConsumer.class);
private final AppConfig datafileAppConfig;
private final JsonMessageParser jsonMessageParser;
public DMaaPMessageConsumer(AppConfig datafileAppConfig) {
this(datafileAppConfig, new JsonMessageParser());
}
protected DMaaPMessageConsumer(AppConfig datafileAppConfig, JsonMessageParser jsonMessageParser) {
this.datafileAppConfig = datafileAppConfig;
this.jsonMessageParser = jsonMessageParser;
}
/**
* Gets the response from the MessageRouter and turns it into a stream of fileReady messages.
*
* @return a stream of fileReady messages.
*/
public Flux<FileReadyMessage> getMessageRouterResponse() {
logger.trace("getMessageRouterResponse called");
try {
ConsumerConfiguration dmaapConsumerConfiguration = datafileAppConfig.getDmaapConsumerConfiguration();
MessageRouterSubscriber messageRouterSubscriber =
dmaapConsumerConfiguration.getMessageRouterSubscriber();
Flux<JsonElement> responseElements =
messageRouterSubscriber.getElements(dmaapConsumerConfiguration.getMessageRouterSubscribeRequest());
return consume(responseElements);
} catch (Exception e) {
logger.warn("Unable to get response from message router", e);
return Flux.empty();
}
}
private Flux<FileReadyMessage> consume(Flux<JsonElement> messages) {
return jsonMessageParser.getMessagesFromJson(messages);
}
}
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