gerrit.onap Code Review - dcaegen2/collectors/datafile.git/blob

   1 /*
   2  * ============LICENSE_START======================================================================
   3  * Copyright (C) 2018 NOKIA Intellectual Property, 2018-2019 Nordix Foundation. All rights reserved.
   4  * ===============================================================================================
   5  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
   6  * in compliance with the License. You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software distributed under the License
  11  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
  12  * or implied. See the License for the specific language governing permissions and limitations under
  13  * the License.
  14  * ============LICENSE_END========================================================================
  15  */
  16
  17 package org.onap.dcaegen2.collectors.datafile.configuration;
  18
  19 import java.time.Duration;
  20 import java.time.Instant;
  21 import java.util.ArrayList;
  22 import java.util.List;
  23 import java.util.concurrent.ScheduledFuture;
  24 import javax.annotation.PostConstruct;
  25 import org.onap.dcaegen2.collectors.datafile.tasks.ScheduledTasks;
  26 import org.springframework.beans.factory.annotation.Autowired;
  27 import org.springframework.context.annotation.Configuration;
  28 import org.springframework.http.HttpStatus;
  29 import org.springframework.http.ResponseEntity;
  30 import org.springframework.scheduling.TaskScheduler;
  31 import org.springframework.scheduling.annotation.EnableScheduling;
  32 import io.swagger.annotations.ApiOperation;
  33 import reactor.core.publisher.Mono;
  34
  35 /**
  36  * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 6/13/18
  37  */
  38 @Configuration
  39 @EnableScheduling
  40 public class SchedulerConfig extends DatafileAppConfig {
  41
  42     private static final int SCHEDULING_DELAY_FOR_DATAFILE_COLLECTOR_TASKS = 15;
  43     private static final int SCHEDULING_REQUEST_FOR_CONFIGURATION_DELAY = 5;
  44     private static volatile List<ScheduledFuture<?>> scheduledFutureList = new ArrayList<>();
  45
  46     private final TaskScheduler taskScheduler;
  47     private final ScheduledTasks scheduledTask;
  48     private final CloudConfiguration cloudConfiguration;
  49
  50     @Autowired
  51     public SchedulerConfig(TaskScheduler taskScheduler, ScheduledTasks scheduledTask,
  52         CloudConfiguration cloudConfiguration) {
  53         this.taskScheduler = taskScheduler;
  54         this.scheduledTask = scheduledTask;
  55         this.cloudConfiguration = cloudConfiguration;
  56     }
  57
  58     /**
  59      * Function which have to stop tasks execution.
  60      *
  61      * @return response entity about status of cancellation operation
  62      */
  63     @ApiOperation(value = "Get response on stopping task execution")
  64     public synchronized Mono<ResponseEntity<String>> getResponseFromCancellationOfTasks() {
  65         scheduledFutureList.forEach(x -> x.cancel(false));
  66         scheduledFutureList.clear();
  67         return Mono.defer(() -> Mono
  68             .just(new ResponseEntity<>("Datafile Service has already been stopped!", HttpStatus.CREATED)));
  69     }
  70
  71     /**
  72      * Function for starting scheduling Datafile workflow.
  73      *
  74      * @return status of operation execution: true - started, false - not started
  75      */
  76     @PostConstruct
  77     @ApiOperation(value = "Start task if possible")
  78     public synchronized boolean tryToStartTask() {
  79         if (scheduledFutureList.isEmpty()) {
  80             scheduledFutureList.add(taskScheduler
  81                 .scheduleAtFixedRate(cloudConfiguration::runTask, Instant.now(),
  82                     Duration.ofMinutes(SCHEDULING_REQUEST_FOR_CONFIGURATION_DELAY)));
  83             scheduledFutureList.add(taskScheduler.scheduleWithFixedDelay(scheduledTask::scheduleMainDatafileEventTask,
  84                 Duration.ofSeconds(SCHEDULING_DELAY_FOR_DATAFILE_COLLECTOR_TASKS)));
  85             return true;
  86         } else {
  87             return false;
  88         }
  89
  90     }
  91 }