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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2022 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.cps.ncmp.dmi.notifications.async;
import com.google.gson.JsonObject;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.onap.cps.ncmp.dmi.exception.HttpClientRequestException;
import org.onap.cps.ncmp.dmi.model.DataAccessRequest;
import org.onap.cps.ncmp.event.model.DmiAsyncRequestResponseEvent;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Service;
@Slf4j
@Service
@RequiredArgsConstructor
public class AsyncTaskExecutor {
private final DmiAsyncRequestResponseEventProducer dmiAsyncRequestResponseEventProducer;
private static final DmiAsyncRequestResponseEventCreator dmiAsyncRequestResponseEventCreator =
new DmiAsyncRequestResponseEventCreator();
private static final Map<DataAccessRequest.OperationEnum, HttpStatus> operationToHttpStatusMap = new HashMap<>(6);
static {
operationToHttpStatusMap.put(null, HttpStatus.OK);
operationToHttpStatusMap.put(DataAccessRequest.OperationEnum.READ, HttpStatus.OK);
operationToHttpStatusMap.put(DataAccessRequest.OperationEnum.CREATE, HttpStatus.CREATED);
operationToHttpStatusMap.put(DataAccessRequest.OperationEnum.PATCH, HttpStatus.OK);
operationToHttpStatusMap.put(DataAccessRequest.OperationEnum.UPDATE, HttpStatus.OK);
operationToHttpStatusMap.put(DataAccessRequest.OperationEnum.DELETE, HttpStatus.NO_CONTENT);
}
/**
* Execute task asynchronously and publish response to supplied topic.
*
* @param taskSupplier functional method is get() task need to executed asynchronously
* @param topicName topic name where message need to be published
* @param requestId unique requestId for async request
* @param operation the operation performed
* @param timeOutInMilliSeconds task timeout in milliseconds
*/
public void executeAsyncTask(final Supplier<String> taskSupplier,
final String topicName,
final String requestId,
final DataAccessRequest.OperationEnum operation,
final int timeOutInMilliSeconds) {
CompletableFuture.supplyAsync(taskSupplier::get)
.orTimeout(timeOutInMilliSeconds, TimeUnit.MILLISECONDS)
.whenCompleteAsync((resourceDataAsJson, throwable) -> {
if (throwable == null) {
final String status = operationToHttpStatusMap.get(operation).getReasonPhrase();
final String code = String.valueOf(operationToHttpStatusMap.get(operation).value());
publishAsyncEvent(topicName, requestId, resourceDataAsJson, status, code);
} else {
log.error("Error occurred with async request {}", throwable.getMessage());
publishAsyncFailureEvent(topicName, requestId, throwable);
}
});
log.info("Async task completed.");
}
private void publishAsyncEvent(final String topicName,
final String requestId,
final String resourceDataAsJson,
final String status,
final String code) {
final DmiAsyncRequestResponseEvent cpsAsyncRequestResponseEvent =
dmiAsyncRequestResponseEventCreator.createEvent(resourceDataAsJson, topicName, requestId, status, code);
dmiAsyncRequestResponseEventProducer.sendMessage(requestId, cpsAsyncRequestResponseEvent);
}
private void publishAsyncFailureEvent(final String topicName,
final String requestId,
final Throwable throwable) {
HttpStatus httpStatus = HttpStatus.INTERNAL_SERVER_ERROR;
if (throwable instanceof HttpClientRequestException) {
final HttpClientRequestException httpClientRequestException = (HttpClientRequestException) throwable;
httpStatus = httpClientRequestException.getHttpStatus();
}
final JsonObject errorDetails = new JsonObject();
errorDetails.addProperty("errorDetails", throwable.getMessage());
publishAsyncEvent(
topicName,
requestId,
errorDetails.toString(),
httpStatus.getReasonPhrase(),
String.valueOf(httpStatus.value())
);
}
}
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