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/*-
* ============LICENSE_START=======================================================
* PNF-REGISTRATION-HANDLER
* ================================================================================
* Copyright (C) 2018 NOKIA 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.dcaegen2.services.prh.controllers;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.onap.dcaegen2.services.prh.tasks.ScheduledTasks;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import reactor.core.publisher.Mono;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ScheduledFuture;
/**
* @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/5/18
*/
@RestController
@Api(value = "ScheduleController", description = "Schedule Controller")
public class ScheduleController {
private static final Logger logger = LoggerFactory.getLogger(ScheduleController.class);
private static final int SCHEDULING_DELAY = 20000;
private static volatile List<ScheduledFuture> scheduledFutureList = new ArrayList<>();
private final TaskScheduler taskScheduler;
private final ScheduledTasks scheduledTask;
@Autowired
public ScheduleController(TaskScheduler taskScheduler, ScheduledTasks scheduledTask) {
this.taskScheduler = taskScheduler;
this.scheduledTask = scheduledTask;
}
@RequestMapping(value = "start", method = RequestMethod.GET)
@ApiOperation(value = "Start scheduling worker request")
public Mono<ResponseEntity<String>> startTasks() {
logger.trace("Receiving start scheduling worker request");
return Mono.fromSupplier(this::tryToStartTask).map(this::createStartTaskResponse);
}
@RequestMapping(value = "stopPrh", method = RequestMethod.GET)
@ApiOperation(value = "Receiving stop scheduling worker request")
public Mono<ResponseEntity<String>> stopTask() {
logger.trace("Receiving stop scheduling worker request");
return getResponseFromCancellationOfTasks();
}
@ApiOperation(value = "Get response on stopping task execution")
private synchronized Mono<ResponseEntity<String>> getResponseFromCancellationOfTasks() {
scheduledFutureList.forEach(x -> x.cancel(false));
scheduledFutureList.clear();
return Mono.defer(() ->
Mono.just(new ResponseEntity<>("PRH Service has already been stopped!", HttpStatus.CREATED))
);
}
@ApiOperation(value = "Start task if possible")
private synchronized boolean tryToStartTask() {
if (scheduledFutureList.isEmpty()) {
scheduledFutureList.add(taskScheduler
.scheduleWithFixedDelay(scheduledTask::scheduleMainPrhEventTask, SCHEDULING_DELAY));
return true;
} else {
return false;
}
}
@ApiOperation(value = "Sends success or error response on starting task execution")
private ResponseEntity<String> createStartTaskResponse(boolean wasScheduled) {
if (wasScheduled) {
return new ResponseEntity<>("PRH Service has been started!", HttpStatus.CREATED);
} else {
return new ResponseEntity<>("PRH Service is still running!", HttpStatus.NOT_ACCEPTABLE);
}
}
}
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