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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.mqtt.homeassistant.internal.listener;
  14
  15 import java.util.concurrent.ScheduledExecutorService;
  16 import java.util.concurrent.ScheduledFuture;
  17 import java.util.concurrent.TimeUnit;
  18 import java.util.concurrent.atomic.AtomicReference;
  19
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.eclipse.jdt.annotation.Nullable;
  22 import org.openhab.binding.mqtt.generic.ChannelStateUpdateListener;
  23 import org.openhab.binding.mqtt.generic.values.Value;
  24 import org.openhab.core.library.types.OnOffType;
  25 import org.openhab.core.thing.ChannelUID;
  26 import org.openhab.core.types.State;
  27
  28 /**
  29  * A listener to set the binary sensor value to 'off' after a timeout.
  30  *
  31  * @author Jochen Klein - Initial contribution
  32  */
  33 @NonNullByDefault
  34 public class OffDelayUpdateStateListener extends ChannelStateUpdateListenerProxy {
  35
  36     private final int offDelay;
  37     private final Value value;
  38     private final ScheduledExecutorService scheduler;
  39
  40     private final AtomicReference<@Nullable ScheduledFuture<?>> delay = new AtomicReference<>();
  41
  42     public OffDelayUpdateStateListener(ChannelStateUpdateListener original, int offDelay, Value value,
  43             ScheduledExecutorService scheduler) {
  44         super(original);
  45         this.offDelay = offDelay;
  46         this.value = value;
  47         this.scheduler = scheduler;
  48     }
  49
  50     @Override
  51     public void updateChannelState(final ChannelUID channelUID, State state) {
  52         super.updateChannelState(channelUID, state);
  53
  54         ScheduledFuture<?> newDelay = null;
  55
  56         if (OnOffType.ON == state) {
  57             newDelay = scheduler.schedule(() -> {
  58                 value.update(OnOffType.OFF);
  59                 OffDelayUpdateStateListener.super.updateChannelState(channelUID, value.getChannelState());
  60             }, offDelay, TimeUnit.SECONDS);
  61         }
  62
  63         ScheduledFuture<?> oldDelay = delay.getAndSet(newDelay);
  64         if (oldDelay != null) {
  65             oldDelay.cancel(false);
  66         }
  67     }
  68 }