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   1 /**
   2  * Copyright (c) 2010-2024 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.smaenergymeter.internal.discovery;
  14
  15 import static org.openhab.binding.smaenergymeter.internal.SMAEnergyMeterBindingConstants.*;
  16
  17 import java.io.IOException;
  18 import java.util.HashMap;
  19 import java.util.Map;
  20 import java.util.Set;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.eclipse.jdt.annotation.Nullable;
  24 import org.openhab.binding.smaenergymeter.internal.handler.EnergyMeter;
  25 import org.openhab.binding.smaenergymeter.internal.packet.PacketListener;
  26 import org.openhab.binding.smaenergymeter.internal.packet.PacketListenerRegistry;
  27 import org.openhab.binding.smaenergymeter.internal.packet.PayloadHandler;
  28 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  29 import org.openhab.core.config.discovery.DiscoveryResult;
  30 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  31 import org.openhab.core.config.discovery.DiscoveryService;
  32 import org.openhab.core.thing.Thing;
  33 import org.openhab.core.thing.ThingTypeUID;
  34 import org.openhab.core.thing.ThingUID;
  35 import org.osgi.service.component.annotations.Activate;
  36 import org.osgi.service.component.annotations.Component;
  37 import org.osgi.service.component.annotations.Reference;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 /**
  42  * The {@link SMAEnergyMeterDiscoveryService} class implements a service
  43  * for discovering the SMA Energy Meter.
  44  *
  45  * @author Osman Basha - Initial contribution
  46  */
  47 @NonNullByDefault
  48 @Component(service = DiscoveryService.class, configurationPid = "discovery.smaenergymeter")
  49 public class SMAEnergyMeterDiscoveryService extends AbstractDiscoveryService implements PayloadHandler {
  50
  51     private final Logger logger = LoggerFactory.getLogger(SMAEnergyMeterDiscoveryService.class);
  52     private final PacketListenerRegistry listenerRegistry;
  53     private @Nullable PacketListener packetListener;
  54
  55     @Activate
  56     public SMAEnergyMeterDiscoveryService(@Reference PacketListenerRegistry listenerRegistry) {
  57         super(SUPPORTED_THING_TYPES_UIDS, 15, true);
  58         this.listenerRegistry = listenerRegistry;
  59     }
  60
  61     @Override
  62     public Set<ThingTypeUID> getSupportedThingTypes() {
  63         return SUPPORTED_THING_TYPES_UIDS;
  64     }
  65
  66     @Override
  67     protected void startBackgroundDiscovery() {
  68         PacketListener packetListener = this.packetListener;
  69         if (packetListener != null) {
  70             return;
  71         }
  72
  73         logger.debug("Start SMAEnergyMeter background discovery");
  74         try {
  75             packetListener = listenerRegistry.getListener(PacketListener.DEFAULT_MCAST_GRP,
  76                     PacketListener.DEFAULT_MCAST_PORT);
  77         } catch (IOException e) {
  78             logger.warn("Could not start background discovery", e);
  79             return;
  80         }
  81
  82         packetListener.addPayloadHandler(this);
  83         this.packetListener = packetListener;
  84     }
  85
  86     @Override
  87     protected void stopBackgroundDiscovery() {
  88         PacketListener packetListener = this.packetListener;
  89         if (packetListener != null) {
  90             packetListener.removePayloadHandler(this);
  91             this.packetListener = null;
  92         }
  93     }
  94
  95     @Override
  96     public void startScan() {
  97     }
  98
  99     @Override
 100     public void handle(EnergyMeter energyMeter) throws IOException {
 101         String identifier = energyMeter.getSerialNumber();
 102         logger.debug("Adding a new SMA Energy Meter with S/N '{}' to inbox", identifier);
 103         Map<String, Object> properties = new HashMap<>();
 104         properties.put(Thing.PROPERTY_VENDOR, "SMA");
 105         properties.put(Thing.PROPERTY_SERIAL_NUMBER, identifier);
 106         ThingUID uid = new ThingUID(THING_TYPE_ENERGY_METER, identifier);
 107         DiscoveryResult result = DiscoveryResultBuilder.create(uid).withProperties(properties)
 108                 .withRepresentationProperty(Thing.PROPERTY_SERIAL_NUMBER).withLabel("SMA Energy Meter #" + identifier)
 109                 .build();
 110         thingDiscovered(result);
 111
 112         logger.debug("Thing discovered '{}'", result);
 113     }
 114 }