git.basschouten.com Git - openhab-addons.git/blob

   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.hdpowerview.internal.discovery;
  14
  15 import static org.openhab.binding.hdpowerview.internal.HDPowerViewBindingConstants.*;
  16
  17 import java.net.UnknownHostException;
  18 import java.util.Collections;
  19 import java.util.concurrent.ScheduledFuture;
  20 import java.util.concurrent.TimeUnit;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.eclipse.jdt.annotation.Nullable;
  24 import org.openhab.binding.hdpowerview.internal.config.HDPowerViewHubConfiguration;
  25 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  26 import org.openhab.core.config.discovery.DiscoveryResult;
  27 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  28 import org.openhab.core.config.discovery.DiscoveryService;
  29 import org.openhab.core.thing.ThingUID;
  30 import org.osgi.service.component.annotations.Component;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 import jcifs.netbios.NbtAddress;
  35
  36 /**
  37  * Discovers HD PowerView hubs by means of NetBios
  38  *
  39  * @author Andy Lintner - Initial contribution
  40  */
  41 @NonNullByDefault
  42 @Component(service = DiscoveryService.class, configurationPid = "discovery.hdpowerview")
  43 public class HDPowerViewHubDiscoveryService extends AbstractDiscoveryService {
  44
  45     private final Logger logger = LoggerFactory.getLogger(HDPowerViewHubDiscoveryService.class);
  46
  47     private final Runnable scanner;
  48     private @Nullable ScheduledFuture<?> backgroundFuture;
  49
  50     public HDPowerViewHubDiscoveryService() {
  51         super(Collections.singleton(THING_TYPE_HUB), 60, true);
  52         scanner = createScanner();
  53     }
  54
  55     @Override
  56     protected void startScan() {
  57         scheduler.execute(scanner);
  58     }
  59
  60     @Override
  61     protected void startBackgroundDiscovery() {
  62         ScheduledFuture<?> backgroundFuture = this.backgroundFuture;
  63         if (backgroundFuture != null && !backgroundFuture.isDone()) {
  64             backgroundFuture.cancel(true);
  65         }
  66         this.backgroundFuture = scheduler.scheduleWithFixedDelay(scanner, 0, 60, TimeUnit.SECONDS);
  67     }
  68
  69     @Override
  70     protected void stopBackgroundDiscovery() {
  71         ScheduledFuture<?> backgroundFuture = this.backgroundFuture;
  72         if (backgroundFuture != null && !backgroundFuture.isDone()) {
  73             backgroundFuture.cancel(true);
  74             this.backgroundFuture = null;
  75         }
  76         super.stopBackgroundDiscovery();
  77     }
  78
  79     private Runnable createScanner() {
  80         return () -> {
  81             for (String netBiosName : NETBIOS_NAMES) {
  82                 try {
  83                     NbtAddress address = NbtAddress.getByName(netBiosName);
  84                     if (address != null) {
  85                         String host = address.getInetAddress().getHostAddress();
  86                         ThingUID thingUID = new ThingUID(THING_TYPE_HUB, host.replace('.', '_'));
  87                         DiscoveryResult hub = DiscoveryResultBuilder.create(thingUID)
  88                                 .withProperty(HDPowerViewHubConfiguration.HOST, host)
  89                                 .withRepresentationProperty(HDPowerViewHubConfiguration.HOST)
  90                                 .withLabel("PowerView Hub (" + host + ")").build();
  91                         logger.debug("NetBios discovered hub on host '{}'", host);
  92                         thingDiscovered(hub);
  93                     }
  94                 } catch (UnknownHostException e) {
  95                     // Nothing to do here - the host couldn't be found, likely because it doesn't
  96                     // exist
  97                 }
  98             }
  99         };
 100     }
 101 }