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   1 /**
   2  * Copyright (c) 2010-2022 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.paradoxalarm.internal.handlers;
  14
  15 import java.util.concurrent.ScheduledFuture;
  16 import java.util.concurrent.TimeUnit;
  17
  18 import org.openhab.binding.paradoxalarm.internal.model.ParadoxPanel;
  19 import org.openhab.core.thing.ChannelUID;
  20 import org.openhab.core.thing.Thing;
  21 import org.openhab.core.thing.ThingStatus;
  22 import org.openhab.core.thing.ThingStatusDetail;
  23 import org.openhab.core.thing.binding.BaseThingHandler;
  24 import org.openhab.core.types.Command;
  25 import org.openhab.core.types.RefreshType;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 /**
  30  * The {@link EntityBaseHandler} abstract handler class that contains common logic for entities.
  31  *
  32  * @author Konstantin Polihronov - Initial contribution
  33  */
  34 public abstract class EntityBaseHandler extends BaseThingHandler {
  35
  36     private static final long INITIAL_DELAY_SECONDS = 15;
  37     private static final int MAX_WAIT_TIME_MILLIS = 60000;
  38     private long timeStamp;
  39
  40     private final Logger logger = LoggerFactory.getLogger(EntityBaseHandler.class);
  41
  42     protected EntityConfiguration config;
  43     private ScheduledFuture<?> delayedSchedule;
  44
  45     public EntityBaseHandler(Thing thing) {
  46         super(thing);
  47     }
  48
  49     @Override
  50     public void initialize() {
  51         logger.trace("Start initializing. {}", thing.getUID());
  52         updateStatus(ThingStatus.UNKNOWN);
  53
  54         config = getConfigAs(EntityConfiguration.class);
  55
  56         timeStamp = System.currentTimeMillis();
  57         delayedSchedule = scheduler.schedule(this::initializeDelayed, INITIAL_DELAY_SECONDS, TimeUnit.SECONDS);
  58     }
  59
  60     private void initializeDelayed() {
  61         logger.debug("Start initializeDelayed() in {}", getThing().getUID());
  62         ParadoxPanel panel = ParadoxPanel.getInstance();
  63         // Asynchronous update not yet done
  64         if (panel.getPanelInformation() == null) {
  65             // Retry until reach MAX_WAIT_TIME
  66             if (System.currentTimeMillis() - timeStamp <= MAX_WAIT_TIME_MILLIS) {
  67                 logger.debug("Panel information is null. Scheduling initializeDelayed() to be executed again in {} sec",
  68                         INITIAL_DELAY_SECONDS);
  69                 delayedSchedule = scheduler.schedule(this::initializeDelayed, INITIAL_DELAY_SECONDS, TimeUnit.SECONDS);
  70             } else {
  71                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.HANDLER_INITIALIZING_ERROR,
  72                         "Panel is not updating the information in " + MAX_WAIT_TIME_MILLIS
  73                                 + " ms. Giving up. Cannot update entity=" + this + ".");
  74             }
  75
  76             // Asynchronous update done but panel is not supported
  77         } else if (!panel.isPanelSupported()) {
  78             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
  79                     "Panel is not supported. Cannot update entity=" + this + ".");
  80             // All OK
  81         } else {
  82             updateStatus(ThingStatus.ONLINE);
  83         }
  84     }
  85
  86     @Override
  87     public void handleCommand(ChannelUID channelUID, Command command) {
  88         if (ThingStatus.OFFLINE == getThing().getStatus()) {
  89             logger.debug("Received {} command but {} is OFFLINE with the following detailed status {}", command,
  90                     getThing().getUID(), getThing().getStatusInfo());
  91             return;
  92         }
  93
  94         if (command instanceof RefreshType) {
  95             updateEntity();
  96         }
  97     }
  98
  99     @Override
 100     public void dispose() {
 101         if (delayedSchedule != null) {
 102             boolean cancelingResult = delayedSchedule.cancel(true);
 103             String cancelingSuccessful = cancelingResult ? "successful" : "failed";
 104             logger.debug("Canceling schedule of {} is {}", delayedSchedule, cancelingSuccessful);
 105         }
 106     }
 107
 108     protected abstract void updateEntity();
 109
 110     protected int calculateEntityIndex() {
 111         return Math.max(0, config.getId() - 1);
 112     }
 113 }