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   1 /**
   2  * Copyright (c) 2010-2020 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.bluetooth.bluez.internal.discovery;
  14
  15 import java.util.Collections;
  16
  17 import org.openhab.binding.bluetooth.bluez.BlueZAdapterConstants;
  18 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  19 import org.openhab.core.config.discovery.DiscoveryResult;
  20 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  21 import org.openhab.core.config.discovery.DiscoveryService;
  22 import org.openhab.core.thing.ThingUID;
  23 import org.osgi.service.component.annotations.Component;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 import tinyb.BluetoothAdapter;
  28 import tinyb.BluetoothManager;
  29
  30 /**
  31  * This is a discovery service, which checks whether we are running on a Linux with a BlueZ stack.
  32  * If this is the case, we create a bridge handler that provides Bluetooth access through BlueZ.
  33  *
  34  * @author Kai Kreuzer - Initial Contribution and API
  35  * @author Hilbrand Bouwkamp - Moved background scan to actual background method
  36  *
  37  */
  38 @Component(immediate = true, service = DiscoveryService.class, configurationPid = "discovery.bluetooth.bluez")
  39 public class BlueZDiscoveryService extends AbstractDiscoveryService {
  40
  41     private final Logger logger = LoggerFactory.getLogger(BlueZDiscoveryService.class);
  42
  43     private BluetoothManager manager;
  44
  45     public BlueZDiscoveryService() {
  46         super(Collections.singleton(BlueZAdapterConstants.THING_TYPE_BLUEZ), 1, true);
  47     }
  48
  49     @Override
  50     protected void startBackgroundDiscovery() {
  51         startScan();
  52     }
  53
  54     @Override
  55     protected void startScan() {
  56         try {
  57             manager = BluetoothManager.getBluetoothManager();
  58             manager.getAdapters().stream().map(this::createDiscoveryResult).forEach(this::thingDiscovered);
  59         } catch (UnsatisfiedLinkError e) {
  60             logger.debug("Not possible to initialize the BlueZ stack. ", e);
  61             return;
  62         } catch (RuntimeException e) {
  63             // we do not get anything more specific from TinyB here
  64             if (e.getMessage() != null && e.getMessage().contains("AccessDenied")) {
  65                 logger.warn(
  66                         "Cannot access BlueZ stack due to permission problems. Make sure that your OS user is part of the 'bluetooth' group of BlueZ.");
  67             } else {
  68                 logger.warn("Failed to scan for Bluetooth devices", e);
  69             }
  70         }
  71     }
  72
  73     private DiscoveryResult createDiscoveryResult(BluetoothAdapter adapter) {
  74         return DiscoveryResultBuilder.create(new ThingUID(BlueZAdapterConstants.THING_TYPE_BLUEZ, getId(adapter)))
  75                 .withLabel("Bluetooth Interface " + adapter.getName())
  76                 .withProperty(BlueZAdapterConstants.PROPERTY_ADDRESS, adapter.getAddress())
  77                 .withRepresentationProperty(BlueZAdapterConstants.PROPERTY_ADDRESS).build();
  78     }
  79
  80     private String getId(BluetoothAdapter adapter) {
  81         return adapter.getInterfaceName().replaceAll("[^a-zA-Z0-9_]", "");
  82     }
  83 }