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   1 /**
   2  * Copyright (c) 2010-2020 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.windcentrale.internal.handler;
  14
  15 import static org.openhab.binding.windcentrale.internal.WindcentraleBindingConstants.*;
  16 import static org.openhab.core.library.unit.MetricPrefix.KILO;
  17
  18 import java.io.IOException;
  19 import java.math.BigDecimal;
  20 import java.util.concurrent.ScheduledFuture;
  21 import java.util.concurrent.TimeUnit;
  22
  23 import org.eclipse.jdt.annotation.NonNullByDefault;
  24 import org.eclipse.jdt.annotation.Nullable;
  25 import org.openhab.binding.windcentrale.internal.config.MillConfig;
  26 import org.openhab.core.cache.ExpiringCache;
  27 import org.openhab.core.io.net.http.HttpUtil;
  28 import org.openhab.core.library.types.DateTimeType;
  29 import org.openhab.core.library.types.DecimalType;
  30 import org.openhab.core.library.types.QuantityType;
  31 import org.openhab.core.library.types.StringType;
  32 import org.openhab.core.library.unit.SmartHomeUnits;
  33 import org.openhab.core.thing.ChannelUID;
  34 import org.openhab.core.thing.Thing;
  35 import org.openhab.core.thing.ThingStatus;
  36 import org.openhab.core.thing.ThingStatusDetail;
  37 import org.openhab.core.thing.binding.BaseThingHandler;
  38 import org.openhab.core.types.Command;
  39 import org.openhab.core.types.RefreshType;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 import com.google.gson.JsonElement;
  44 import com.google.gson.JsonObject;
  45 import com.google.gson.JsonParseException;
  46 import com.google.gson.JsonParser;
  47
  48 /**
  49  * The {@link WindcentraleHandler} is responsible for handling commands, which are
  50  * sent to one of the channels.
  51  *
  52  * @author Marcel Verpaalen - Initial contribution
  53  * @author Wouter Born - Add null annotations
  54  */
  55 @NonNullByDefault
  56 public class WindcentraleHandler extends BaseThingHandler {
  57
  58     private static final String HOURS_RUN_THIS_YEAR = "hoursRunThisYear";
  59     private static final String URL_FORMAT = "https://zep-api.windcentrale.nl/production/%d/live?ignoreLoadingBar=true";
  60     private static final long CACHE_EXPIRY = TimeUnit.SECONDS.toMillis(5);
  61
  62     private final Logger logger = LoggerFactory.getLogger(WindcentraleHandler.class);
  63     private final JsonParser parser = new JsonParser();
  64
  65     private @Nullable MillConfig millConfig;
  66     private @Nullable String millUrl;
  67     private @Nullable ScheduledFuture<?> pollingJob;
  68
  69     private final ExpiringCache<@Nullable String> windcentraleCache = new ExpiringCache<>(CACHE_EXPIRY, () -> {
  70         try {
  71             return millUrl != null ? HttpUtil.executeUrl("GET", millUrl, 5000) : null;
  72         } catch (IOException e) {
  73             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.COMMUNICATION_ERROR, e.getMessage());
  74             return null;
  75         }
  76     });
  77
  78     public WindcentraleHandler(Thing thing) {
  79         super(thing);
  80     }
  81
  82     @Override
  83     public void handleCommand(ChannelUID channelUID, Command command) {
  84         if (command == RefreshType.REFRESH) {
  85             logger.debug("Refreshing {}", channelUID);
  86             updateData();
  87         } else {
  88             logger.debug("This binding is a read-only binding and cannot handle commands");
  89         }
  90     }
  91
  92     @Override
  93     public void initialize() {
  94         logger.debug("Initializing Windcentrale handler '{}'", getThing().getUID());
  95
  96         final MillConfig config = getConfig().as(MillConfig.class);
  97
  98         millConfig = config;
  99         millUrl = String.format(URL_FORMAT, config.millId);
 100         pollingJob = scheduler.scheduleWithFixedDelay(this::updateData, 0, config.refreshInterval, TimeUnit.SECONDS);
 101
 102         logger.debug("Polling job scheduled to run every {} sec. for '{}'", config.refreshInterval,
 103                 getThing().getUID());
 104
 105         updateProperty(Thing.PROPERTY_VENDOR, "Windcentrale");
 106         updateProperty(Thing.PROPERTY_MODEL_ID, "Windmolen");
 107         updateProperty(Thing.PROPERTY_SERIAL_NUMBER, Integer.toString(config.millId));
 108     }
 109
 110     @Override
 111     public void dispose() {
 112         logger.debug("Disposing Windcentrale handler '{}'", getThing().getUID());
 113         if (pollingJob != null) {
 114             pollingJob.cancel(true);
 115             pollingJob = null;
 116         }
 117     }
 118
 119     private synchronized void updateData() {
 120         try {
 121             logger.debug("Update windmill data '{}'", getThing().getUID());
 122
 123             final MillConfig config = millConfig;
 124             final String rawMillData = windcentraleCache.getValue();
 125
 126             if (config == null || rawMillData == null) {
 127                 return;
 128             }
 129             logger.trace("Retrieved updated mill data: {}", rawMillData);
 130             final JsonElement jsonElement = parser.parse(rawMillData);
 131
 132             if (!(jsonElement instanceof JsonObject)) {
 133                 throw new JsonParseException("Could not parse windmill json data");
 134             }
 135             final JsonObject millData = (JsonObject) jsonElement;
 136
 137             updateState(CHANNEL_WIND_SPEED, new DecimalType(millData.get(CHANNEL_WIND_SPEED).getAsString()));
 138             updateState(CHANNEL_WIND_DIRECTION, new StringType(millData.get(CHANNEL_WIND_DIRECTION).getAsString()));
 139             updateState(CHANNEL_POWER_TOTAL,
 140                     new QuantityType<>(millData.get(CHANNEL_POWER_TOTAL).getAsBigDecimal(), KILO(SmartHomeUnits.WATT)));
 141             updateState(CHANNEL_POWER_PER_WD,
 142                     new QuantityType<>(
 143                             millData.get(CHANNEL_POWER_PER_WD).getAsBigDecimal().multiply(new BigDecimal(config.wd)),
 144                             SmartHomeUnits.WATT));
 145             updateState(CHANNEL_POWER_RELATIVE,
 146                     new QuantityType<>(millData.get(CHANNEL_POWER_RELATIVE).getAsBigDecimal(), SmartHomeUnits.PERCENT));
 147             updateState(CHANNEL_ENERGY,
 148                     new QuantityType<>(millData.get(CHANNEL_ENERGY).getAsBigDecimal(), SmartHomeUnits.KILOWATT_HOUR));
 149             updateState(CHANNEL_ENERGY_FC, new QuantityType<>(millData.get(CHANNEL_ENERGY_FC).getAsBigDecimal(),
 150                     SmartHomeUnits.KILOWATT_HOUR));
 151             updateState(CHANNEL_RUNTIME,
 152                     new QuantityType<>(millData.get(HOURS_RUN_THIS_YEAR).getAsBigDecimal(), SmartHomeUnits.HOUR));
 153             updateState(CHANNEL_RUNTIME_PER,
 154                     new QuantityType<>(millData.get(CHANNEL_RUNTIME_PER).getAsBigDecimal(), SmartHomeUnits.PERCENT));
 155             updateState(CHANNEL_LAST_UPDATE, new DateTimeType(millData.get(CHANNEL_LAST_UPDATE).getAsString()));
 156
 157             if (!getThing().getStatus().equals(ThingStatus.ONLINE)) {
 158                 updateStatus(ThingStatus.ONLINE);
 159             }
 160         } catch (final RuntimeException e) {
 161             logger.debug("Failed to process windmill data", e);
 162             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.COMMUNICATION_ERROR,
 163                     "Failed to process mill data");
 164         }
 165     }
 166 }