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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
  14 package org.openhab.binding.gree.internal.discovery;
  15
  16 import static org.openhab.binding.gree.internal.GreeBindingConstants.*;
  17
  18 import java.net.DatagramSocket;
  19 import java.net.SocketException;
  20 import java.util.HashMap;
  21 import java.util.Map;
  22
  23 import org.eclipse.jdt.annotation.NonNullByDefault;
  24 import org.eclipse.jdt.annotation.Nullable;
  25 import org.openhab.binding.gree.internal.GreeException;
  26 import org.openhab.binding.gree.internal.GreeTranslationProvider;
  27 import org.openhab.binding.gree.internal.handler.GreeAirDevice;
  28 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  29 import org.openhab.core.config.discovery.DiscoveryResult;
  30 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  31 import org.openhab.core.config.discovery.DiscoveryService;
  32 import org.openhab.core.net.NetworkAddressService;
  33 import org.openhab.core.thing.Thing;
  34 import org.openhab.core.thing.ThingUID;
  35 import org.osgi.service.component.annotations.Activate;
  36 import org.osgi.service.component.annotations.Component;
  37 import org.osgi.service.component.annotations.Modified;
  38 import org.osgi.service.component.annotations.Reference;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41
  42 /**
  43  * {@link GreeDiscoveryService} implements the device discovery service. UDP broadtcast ius used to find the devices on
  44  * the local subnet.
  45  *
  46  * @author Markus Michels - Initial contribution
  47  *
  48  */
  49 @NonNullByDefault
  50 @Component(service = DiscoveryService.class, configurationPid = "discovery.gree")
  51 public class GreeDiscoveryService extends AbstractDiscoveryService {
  52     private static final int TIMEOUT_SEC = 10;
  53     private final Logger logger = LoggerFactory.getLogger(GreeDiscoveryService.class);
  54     private final GreeDeviceFinder deviceFinder;
  55     private final GreeTranslationProvider messages;
  56     private final String broadcastAddress;
  57
  58     @Activate
  59     public GreeDiscoveryService(@Reference GreeDeviceFinder deviceFinder,
  60             @Reference NetworkAddressService networkAddressService,
  61             @Reference GreeTranslationProvider translationProvider, @Nullable Map<String, Object> configProperties) {
  62         super(SUPPORTED_THING_TYPES_UIDS, TIMEOUT_SEC);
  63         this.messages = translationProvider;
  64         this.deviceFinder = deviceFinder;
  65         String ip = networkAddressService.getConfiguredBroadcastAddress();
  66         broadcastAddress = ip != null ? ip : "";
  67         activate(configProperties);
  68     }
  69
  70     @Override
  71     @Modified
  72     protected void modified(@Nullable Map<String, Object> configProperties) {
  73         super.modified(configProperties);
  74     }
  75
  76     @Override
  77     protected void startBackgroundDiscovery() {
  78         // It's very unusual that a new unit gets installed frequently so we run the discovery once when the binding is
  79         // started, but not frequently
  80         scheduler.execute(this::startScan);
  81     }
  82
  83     @Override
  84     protected void stopBackgroundDiscovery() {
  85         stopScan();
  86     }
  87
  88     @Override
  89     protected void startScan() {
  90         try (DatagramSocket clientSocket = new DatagramSocket()) {
  91             deviceFinder.scan(clientSocket, broadcastAddress, true);
  92
  93             int count = deviceFinder.getScannedDeviceCount();
  94             logger.debug("{}", messages.get("discovery.result", count));
  95             if (count > 0) {
  96                 logger.debug("Adding uinits to Inbox");
  97                 createResult(deviceFinder.getDevices());
  98             }
  99         } catch (GreeException e) {
 100             logger.info("Discovery: {}", messages.get("discovery.exception", e.getMessage()));
 101         } catch (SocketException | RuntimeException e) {
 102             logger.warn("Discovery: {}", messages.get("discovery.exception", "RuntimeException"), e);
 103         }
 104     }
 105
 106     public void createResult(Map<String, GreeAirDevice> deviceList) {
 107         for (GreeAirDevice device : deviceList.values()) {
 108             String ipAddress = device.getAddress().getHostAddress();
 109             logger.debug("{}", messages.get("discovery.newunit", device.getName(), ipAddress, device.getId()));
 110             Map<String, Object> properties = new HashMap<>();
 111             properties.put(Thing.PROPERTY_VENDOR, device.getVendor());
 112             properties.put(Thing.PROPERTY_MODEL_ID, device.getModel());
 113             properties.put(Thing.PROPERTY_MAC_ADDRESS, device.getId());
 114             properties.put(PROPERTY_IP, ipAddress);
 115             properties.put(PROPERTY_BROADCAST, broadcastAddress);
 116             ThingUID thingUID = new ThingUID(THING_TYPE_GREEAIRCON, device.getId());
 117             DiscoveryResult result = DiscoveryResultBuilder.create(thingUID).withProperties(properties)
 118                     .withRepresentationProperty(Thing.PROPERTY_MAC_ADDRESS).withLabel(device.getName()).build();
 119             thingDiscovered(result);
 120         }
 121     }
 122
 123     @Override
 124     public void deactivate() {
 125         removeOlderResults(getTimestampOfLastScan());
 126         super.deactivate();
 127     }
 128 }