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

   1 /*
   2  * ============LICENSE_START======================================================================
   3  * Copyright (C) 2018 NOKIA Intellectual Property, 2018 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
  25 import javax.annotation.PostConstruct;
  26
  27 import org.onap.dcaegen2.collectors.datafile.tasks.ScheduledTasks;
  28 import org.springframework.beans.factory.annotation.Autowired;
  29 import org.springframework.context.annotation.Configuration;
  30 import org.springframework.http.HttpStatus;
  31 import org.springframework.http.ResponseEntity;
  32 import org.springframework.scheduling.TaskScheduler;
  33 import org.springframework.scheduling.annotation.EnableScheduling;
  34
  35 import io.swagger.annotations.ApiOperation;
  36 import reactor.core.publisher.Mono;
  37
  38 /**
  39  * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 6/13/18
  40  */
  41 @Configuration
  42 @EnableScheduling
  43 public class SchedulerConfig extends DatafileAppConfig {
  44
  45     private static final int SCHEDULING_DELAY_FOR_DATAFILE_COLLECTOR_TASKS = 15;
  46     private static final int SCHEDULING_REQUEST_FOR_CONFIGURATION_DELAY = 5;
  47     private static volatile List<ScheduledFuture> scheduledFutureList = new ArrayList<>();
  48
  49     private final TaskScheduler taskScheduler;
  50     private final ScheduledTasks scheduledTask;
  51     private final CloudConfiguration cloudConfiguration;
  52
  53     @Autowired
  54     public SchedulerConfig(TaskScheduler taskScheduler, ScheduledTasks scheduledTask,
  55         CloudConfiguration cloudConfiguration) {
  56         this.taskScheduler = taskScheduler;
  57         this.scheduledTask = scheduledTask;
  58         this.cloudConfiguration = cloudConfiguration;
  59     }
  60
  61     /**
  62      * Function which have to stop tasks execution.
  63      *
  64      * @return response entity about status of cancellation operation
  65      */
  66     @ApiOperation(value = "Get response on stopping task execution")
  67     public synchronized Mono<ResponseEntity<String>> getResponseFromCancellationOfTasks() {
  68         scheduledFutureList.forEach(x -> x.cancel(false));
  69         scheduledFutureList.clear();
  70         return Mono.defer(() -> Mono
  71             .just(new ResponseEntity<>("Datafile Service has already been stopped!", HttpStatus.CREATED)));
  72     }
  73
  74     /**
  75      * Function for starting scheduling Datafile workflow.
  76      *
  77      * @return status of operation execution: true - started, false - not started
  78      */
  79     @PostConstruct
  80     @ApiOperation(value = "Start task if possible")
  81     public synchronized boolean tryToStartTask() {
  82         if (scheduledFutureList.isEmpty()) {
  83             scheduledFutureList.add(taskScheduler
  84                 .scheduleAtFixedRate(cloudConfiguration::runTask, Instant.now(),
  85                     Duration.ofMinutes(SCHEDULING_REQUEST_FOR_CONFIGURATION_DELAY)));
  86             scheduledFutureList.add(taskScheduler.scheduleWithFixedDelay(scheduledTask::scheduleMainDatafileEventTask,
  87                 Duration.ofSeconds(SCHEDULING_DELAY_FOR_DATAFILE_COLLECTOR_TASKS)));
  88             return true;
  89         } else {
  90             return false;
  91         }
  92
  93     }
  94 }