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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.Arrays;
  18 import java.util.Collections;
  19 import java.util.HashMap;
  20 import java.util.HashSet;
  21 import java.util.Hashtable;
  22 import java.util.Map;
  23 import java.util.Set;
  24
  25 import org.eclipse.jdt.annotation.NonNullByDefault;
  26 import org.eclipse.jdt.annotation.Nullable;
  27 import org.openhab.core.config.discovery.DiscoveryService;
  28 import org.openhab.core.thing.Bridge;
  29 import org.openhab.core.thing.Thing;
  30 import org.openhab.core.thing.ThingTypeUID;
  31 import org.openhab.core.thing.ThingUID;
  32 import org.openhab.core.thing.binding.BaseThingHandlerFactory;
  33 import org.openhab.core.thing.binding.ThingHandler;
  34 import org.openhab.core.thing.binding.ThingHandlerFactory;
  35 import org.osgi.framework.ServiceRegistration;
  36 import org.osgi.service.component.annotations.Component;
  37
  38 /**
  39  * The {@link RdsHandlerFactory} creates things and thing handlers
  40  *
  41  * @author Andrew Fiddian-Green - Initial contribution
  42  */
  43 @NonNullByDefault
  44 @Component(configurationPid = "binding.siemensrds", service = ThingHandlerFactory.class)
  45 public class RdsHandlerFactory extends BaseThingHandlerFactory {
  46
  47     private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Collections
  48             .unmodifiableSet(new HashSet<>(Arrays.asList(THING_TYPE_CLOUD, THING_TYPE_RDS)));
  49
  50     private final Map<ThingUID, ServiceRegistration<?>> discos = new HashMap<>();
  51
  52     @Override
  53     public boolean supportsThingType(ThingTypeUID thingTypeUID) {
  54         return SUPPORTED_THING_TYPES_UIDS.contains(thingTypeUID);
  55     }
  56
  57     @Override
  58     protected @Nullable ThingHandler createHandler(Thing thing) {
  59         ThingTypeUID thingTypeUID = thing.getThingTypeUID();
  60
  61         if ((thingTypeUID.equals(THING_TYPE_CLOUD)) && (thing instanceof Bridge)) {
  62             RdsCloudHandler handler = new RdsCloudHandler((Bridge) thing);
  63             createDiscoveryService(handler);
  64             return handler;
  65         }
  66
  67         if (thingTypeUID.equals(THING_TYPE_RDS)) {
  68             return new RdsHandler(thing);
  69         }
  70
  71         return null;
  72     }
  73
  74     @Override
  75     protected synchronized void removeHandler(ThingHandler handler) {
  76         if (handler instanceof RdsCloudHandler) {
  77             destroyDiscoveryService((RdsCloudHandler) handler);
  78         }
  79     }
  80
  81     /*
  82      * create a discovery service so that a newly created cloud account will find
  83      * the things that it supports
  84      */
  85     private synchronized void createDiscoveryService(RdsCloudHandler handler) {
  86         // create a new discovery service
  87         RdsDiscoveryService ds = new RdsDiscoveryService(handler);
  88
  89         // register the discovery service
  90         ServiceRegistration<?> serviceReg = bundleContext.registerService(DiscoveryService.class.getName(), ds,
  91                 new Hashtable<>());
  92
  93         /*
  94          * store service registration in a list so we can destroy it when the respective
  95          * hub is destroyed
  96          */
  97         discos.put(handler.getThing().getUID(), serviceReg);
  98
  99         // finally activate the discovery service
 100         ds.activate();
 101     }
 102
 103     /*
 104      * destroy the discovery service
 105      */
 106     private synchronized void destroyDiscoveryService(RdsCloudHandler handler) {
 107         // fetch the respective thing's service registration from our list
 108         @Nullable
 109         ServiceRegistration<?> serviceReg = discos.remove(handler.getThing().getUID());
 110
 111         // retrieve the respective discovery service
 112         if (serviceReg != null) {
 113             RdsDiscoveryService disco = (RdsDiscoveryService) bundleContext.getService(serviceReg.getReference());
 114
 115             // unregister the service
 116             serviceReg.unregister();
 117
 118             // deactivate the service
 119             if (disco != null) {
 120                 disco.deactivate();
 121             }
 122         }
 123     }
 124 }