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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.siemensrds.internal;
  14
  15 import static org.openhab.binding.siemensrds.internal.RdsBindingConstants.*;
  16
  17 import java.util.HashMap;
  18 import java.util.Hashtable;
  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.core.config.discovery.DiscoveryService;
  25 import org.openhab.core.thing.Bridge;
  26 import org.openhab.core.thing.Thing;
  27 import org.openhab.core.thing.ThingTypeUID;
  28 import org.openhab.core.thing.ThingUID;
  29 import org.openhab.core.thing.binding.BaseThingHandlerFactory;
  30 import org.openhab.core.thing.binding.ThingHandler;
  31 import org.openhab.core.thing.binding.ThingHandlerFactory;
  32 import org.osgi.framework.ServiceRegistration;
  33 import org.osgi.service.component.annotations.Component;
  34
  35 /**
  36  * The {@link RdsHandlerFactory} creates things and thing handlers
  37  *
  38  * @author Andrew Fiddian-Green - Initial contribution
  39  */
  40 @NonNullByDefault
  41 @Component(configurationPid = "binding.siemensrds", service = ThingHandlerFactory.class)
  42 public class RdsHandlerFactory extends BaseThingHandlerFactory {
  43
  44     private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Set.of(THING_TYPE_CLOUD, THING_TYPE_RDS);
  45
  46     private final Map<ThingUID, ServiceRegistration<?>> discos = new HashMap<>();
  47
  48     @Override
  49     public boolean supportsThingType(ThingTypeUID thingTypeUID) {
  50         return SUPPORTED_THING_TYPES_UIDS.contains(thingTypeUID);
  51     }
  52
  53     @Override
  54     protected @Nullable ThingHandler createHandler(Thing thing) {
  55         ThingTypeUID thingTypeUID = thing.getThingTypeUID();
  56
  57         if ((thingTypeUID.equals(THING_TYPE_CLOUD)) && (thing instanceof Bridge bridge)) {
  58             RdsCloudHandler handler = new RdsCloudHandler(bridge);
  59             createDiscoveryService(handler);
  60             return handler;
  61         }
  62
  63         if (thingTypeUID.equals(THING_TYPE_RDS)) {
  64             return new RdsHandler(thing);
  65         }
  66
  67         return null;
  68     }
  69
  70     @Override
  71     protected synchronized void removeHandler(ThingHandler handler) {
  72         if (handler instanceof RdsCloudHandler cloudHandler) {
  73             destroyDiscoveryService(cloudHandler);
  74         }
  75     }
  76
  77     /*
  78      * create a discovery service so that a newly created cloud account will find
  79      * the things that it supports
  80      */
  81     private synchronized void createDiscoveryService(RdsCloudHandler handler) {
  82         // create a new discovery service
  83         RdsDiscoveryService ds = new RdsDiscoveryService(handler);
  84
  85         // register the discovery service
  86         ServiceRegistration<?> serviceReg = bundleContext.registerService(DiscoveryService.class.getName(), ds,
  87                 new Hashtable<>());
  88
  89         /*
  90          * store service registration in a list so we can destroy it when the respective
  91          * hub is destroyed
  92          */
  93         discos.put(handler.getThing().getUID(), serviceReg);
  94
  95         // finally activate the discovery service
  96         ds.activate();
  97     }
  98
  99     /*
 100      * destroy the discovery service
 101      */
 102     private synchronized void destroyDiscoveryService(RdsCloudHandler handler) {
 103         // fetch the respective thing's service registration from our list
 104         @Nullable
 105         ServiceRegistration<?> serviceReg = discos.remove(handler.getThing().getUID());
 106
 107         // retrieve the respective discovery service
 108         if (serviceReg != null) {
 109             RdsDiscoveryService disco = (RdsDiscoveryService) bundleContext.getService(serviceReg.getReference());
 110
 111             // unregister the service
 112             serviceReg.unregister();
 113
 114             // deactivate the service
 115             if (disco != null) {
 116                 disco.deactivate();
 117             }
 118         }
 119     }
 120 }