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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.netatmo.internal.handler.capability;
  14
  15 import static java.time.temporal.ChronoUnit.*;
  16
  17 import java.time.Duration;
  18 import java.time.Instant;
  19 import java.util.Optional;
  20 import java.util.concurrent.ScheduledExecutorService;
  21 import java.util.concurrent.ScheduledFuture;
  22 import java.util.concurrent.TimeUnit;
  23
  24 import org.eclipse.jdt.annotation.NonNullByDefault;
  25 import org.openhab.binding.netatmo.internal.api.dto.NAThing;
  26 import org.openhab.binding.netatmo.internal.handler.CommonInterface;
  27 import org.openhab.core.thing.ThingStatus;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31 /**
  32  * {@link RefreshCapability} is the class used to embed the refreshing needs calculation for devices
  33  *
  34  * @author Gaël L'hopital - Initial contribution
  35  *
  36  */
  37 @NonNullByDefault
  38 public class RefreshCapability extends Capability {
  39     private static final Duration DEFAULT_DELAY = Duration.of(20, SECONDS);
  40     private static final Duration PROBING_INTERVAL = Duration.of(120, SECONDS);
  41     private static final Duration OFFLINE_INTERVAL = Duration.of(15, MINUTES);
  42
  43     private final Logger logger = LoggerFactory.getLogger(RefreshCapability.class);
  44     private final ScheduledExecutorService scheduler;
  45
  46     private Duration dataValidity;
  47     private Instant dataTimeStamp = Instant.now();
  48     private Instant dataTimeStamp0 = Instant.MIN;
  49     private Optional<ScheduledFuture<?>> refreshJob = Optional.empty();
  50     private final boolean refreshConfigured;
  51
  52     public RefreshCapability(CommonInterface handler, ScheduledExecutorService scheduler, int refreshInterval) {
  53         super(handler);
  54         this.scheduler = scheduler;
  55         this.dataValidity = Duration.ofSeconds(Math.max(0, refreshInterval));
  56         this.refreshConfigured = !probing();
  57         freeJobAndReschedule(2);
  58     }
  59
  60     @Override
  61     public void dispose() {
  62         freeJobAndReschedule(0);
  63         super.dispose();
  64     }
  65
  66     @Override
  67     public void expireData() {
  68         dataTimeStamp = Instant.now().minus(dataValidity);
  69         freeJobAndReschedule(1);
  70     }
  71
  72     private Duration dataAge() {
  73         return Duration.between(dataTimeStamp, Instant.now());
  74     }
  75
  76     private boolean probing() {
  77         return dataValidity.getSeconds() <= 0;
  78     }
  79
  80     private void proceedWithUpdate() {
  81         handler.proceedWithUpdate();
  82         long delay;
  83         if (!ThingStatus.ONLINE.equals(handler.getThing().getStatus())) {
  84             logger.debug("Module is not ONLINE; special refresh interval is used");
  85             delay = OFFLINE_INTERVAL.toSeconds();
  86             if (probing()) {
  87                 dataTimeStamp0 = Instant.MIN;
  88             }
  89         } else if (refreshConfigured) {
  90             delay = dataValidity.getSeconds();
  91         } else {
  92             delay = (probing() ? PROBING_INTERVAL : dataValidity.minus(dataAge()).plus(DEFAULT_DELAY)).toSeconds();
  93         }
  94         delay = delay < 2 ? PROBING_INTERVAL.toSeconds() : delay;
  95         logger.debug("Module refreshed, next one in {} s", delay);
  96         freeJobAndReschedule(delay);
  97     }
  98
  99     @Override
 100     protected void updateNAThing(NAThing newData) {
 101         super.updateNAThing(newData);
 102         newData.getLastSeen().ifPresent(timestamp -> {
 103             Instant tsInstant = timestamp.toInstant();
 104             if (probing()) {
 105                 if (Instant.MIN.equals(dataTimeStamp0)) {
 106                     dataTimeStamp0 = tsInstant;
 107                     logger.debug("First data timestamp is {}", dataTimeStamp0);
 108                 } else if (tsInstant.isAfter(dataTimeStamp0)) {
 109                     dataValidity = Duration.between(dataTimeStamp0, tsInstant);
 110                     logger.debug("Data validity period identified to be {}", dataValidity);
 111                 } else {
 112                     logger.debug("Data validity period not yet found - data timestamp unchanged");
 113                 }
 114             }
 115             dataTimeStamp = tsInstant;
 116         });
 117     }
 118
 119     private void freeJobAndReschedule(long delay) {
 120         refreshJob.ifPresent(job -> job.cancel(false));
 121         refreshJob = delay == 0 ? Optional.empty()
 122                 : Optional.of(scheduler.schedule(() -> proceedWithUpdate(), delay, TimeUnit.SECONDS));
 123     }
 124 }