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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.leapmotion.internal.discovery;
  14
  15 import java.util.Collections;
  16 import java.util.Map;
  17
  18 import org.eclipse.jdt.annotation.NonNullByDefault;
  19 import org.eclipse.jdt.annotation.Nullable;
  20 import org.openhab.binding.leapmotion.internal.LeapMotionBindingConstants;
  21 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  22 import org.openhab.core.config.discovery.DiscoveryResult;
  23 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  24 import org.openhab.core.config.discovery.DiscoveryService;
  25 import org.openhab.core.thing.ThingUID;
  26 import org.osgi.service.component.annotations.Component;
  27
  28 import com.leapmotion.leap.Controller;
  29 import com.leapmotion.leap.Listener;
  30
  31 /**
  32  * This is a discovery service, which finds locally attached LeapMotion controllers and adds them to the Inbox
  33  *
  34  * @author Kai Kreuzer - Initial contribution
  35  *
  36  */
  37 @NonNullByDefault
  38 @Component(service = DiscoveryService.class, configurationPid = "discovery.leapmotion")
  39 public class LeapMotionDiscoveryService extends AbstractDiscoveryService {
  40
  41     private @NonNullByDefault({}) Controller leapController;
  42     private @NonNullByDefault({}) Listener listener;
  43
  44     public LeapMotionDiscoveryService() throws IllegalArgumentException {
  45         super(Collections.singleton(LeapMotionBindingConstants.THING_TYPE_CONTROLLER), 10, true);
  46     }
  47
  48     @Override
  49     protected void activate(@Nullable Map<String, Object> configProperties) {
  50         leapController = new Controller();
  51         listener = new Listener() {
  52             @Override
  53             public void onConnect(@Nullable Controller c) {
  54                 createDiscoveryResult();
  55             }
  56
  57             @Override
  58             public void onDisconnect(@Nullable Controller c) {
  59                 removeDiscoveryResult();
  60             }
  61         };
  62         super.activate(configProperties);
  63     }
  64
  65     @Override
  66     protected void deactivate() {
  67         leapController.removeListener(listener);
  68         listener = null;
  69         leapController.delete();
  70         leapController = null;
  71         super.deactivate();
  72     }
  73
  74     @Override
  75     protected void startScan() {
  76         if (leapController.isConnected()) {
  77             createDiscoveryResult();
  78         }
  79     }
  80
  81     @Override
  82     protected void startBackgroundDiscovery() {
  83         super.startBackgroundDiscovery();
  84         leapController.addListener(listener);
  85     }
  86
  87     private void createDiscoveryResult() {
  88         DiscoveryResult result = DiscoveryResultBuilder
  89                 .create(new ThingUID(LeapMotionBindingConstants.THING_TYPE_CONTROLLER, "local"))
  90                 .withLabel("Leap Motion Controller").build();
  91         thingDiscovered(result);
  92     }
  93
  94     private void removeDiscoveryResult() {
  95         removeOlderResults(System.currentTimeMillis());
  96     }
  97 }