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.folderwatcher.internal.handler;
  14
  15 import static org.openhab.binding.folderwatcher.internal.FolderWatcherBindingConstants.CHANNEL_NEWFILE;
  16
  17 import java.io.File;
  18 import java.io.IOException;
  19 import java.util.ArrayList;
  20 import java.util.List;
  21 import java.util.concurrent.ScheduledFuture;
  22 import java.util.concurrent.TimeUnit;
  23
  24 import org.eclipse.jdt.annotation.NonNullByDefault;
  25 import org.eclipse.jdt.annotation.Nullable;
  26 import org.openhab.binding.folderwatcher.internal.api.S3Actions;
  27 import org.openhab.binding.folderwatcher.internal.common.WatcherCommon;
  28 import org.openhab.binding.folderwatcher.internal.config.S3BucketWatcherConfiguration;
  29 import org.openhab.core.OpenHAB;
  30 import org.openhab.core.io.net.http.HttpClientFactory;
  31 import org.openhab.core.thing.ChannelUID;
  32 import org.openhab.core.thing.Thing;
  33 import org.openhab.core.thing.ThingStatus;
  34 import org.openhab.core.thing.ThingStatusDetail;
  35 import org.openhab.core.thing.binding.BaseThingHandler;
  36 import org.openhab.core.types.Command;
  37 import org.openhab.core.types.RefreshType;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 /**
  42  * The {@link S3BucketWatcherHandler} is responsible for handling commands, which are
  43  * sent to one of the channels.
  44  *
  45  * @author Alexandr Salamatov - Initial contribution
  46  */
  47 @NonNullByDefault
  48 public class S3BucketWatcherHandler extends BaseThingHandler {
  49     private final Logger logger = LoggerFactory.getLogger(S3BucketWatcherHandler.class);
  50     private S3BucketWatcherConfiguration config = new S3BucketWatcherConfiguration();
  51     private File currentS3ListingFile = new File(OpenHAB.getUserDataFolder() + File.separator + "FolderWatcher"
  52             + File.separator + thing.getUID().getAsString().replace(':', '_') + ".data");
  53     private @Nullable ScheduledFuture<?> executionJob;
  54     private List<String> previousS3Listing = new ArrayList<>();
  55     private HttpClientFactory httpClientFactory;
  56     private @Nullable S3Actions s3;
  57
  58     public S3BucketWatcherHandler(Thing thing, HttpClientFactory httpClientFactory) {
  59         super(thing);
  60         this.httpClientFactory = httpClientFactory;
  61     }
  62
  63     @Override
  64     public void handleCommand(ChannelUID channelUID, Command command) {
  65         logger.debug("Channel {} triggered with command {}", channelUID.getId(), command);
  66         if (command instanceof RefreshType) {
  67             refreshS3BucketInformation();
  68         }
  69     }
  70
  71     @Override
  72     public void initialize() {
  73         config = getConfigAs(S3BucketWatcherConfiguration.class);
  74
  75         if (config.s3Anonymous) {
  76             s3 = new S3Actions(httpClientFactory, config.s3BucketName, config.awsRegion);
  77         } else {
  78             s3 = new S3Actions(httpClientFactory, config.s3BucketName, config.awsRegion, config.awsKey,
  79                     config.awsSecret);
  80         }
  81
  82         try {
  83             previousS3Listing = WatcherCommon.initStorage(currentS3ListingFile, config.s3BucketName);
  84         } catch (IOException e) {
  85             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, e.getMessage());
  86             logger.debug("Can't write file {}: {}", currentS3ListingFile, e.getMessage());
  87             return;
  88         }
  89
  90         if (refreshS3BucketInformation()) {
  91             if (config.pollIntervalS3 > 0) {
  92                 updateStatus(ThingStatus.ONLINE);
  93                 executionJob = scheduler.scheduleWithFixedDelay(this::refreshS3BucketInformation, config.pollIntervalS3,
  94                         config.pollIntervalS3, TimeUnit.SECONDS);
  95             } else {
  96                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
  97                         "Polling interval must be greater then 0 seconds");
  98                 return;
  99             }
 100         }
 101     }
 102
 103     private boolean refreshS3BucketInformation() {
 104         List<String> currentS3Listing = new ArrayList<>();
 105         try {
 106             currentS3Listing = s3.listBucket(config.s3Path);
 107             List<String> difS3Listing = new ArrayList<>(currentS3Listing);
 108             difS3Listing.removeAll(previousS3Listing);
 109             difS3Listing.forEach(file -> triggerChannel(CHANNEL_NEWFILE, file));
 110
 111             if (!difS3Listing.isEmpty()) {
 112                 WatcherCommon.saveNewListing(difS3Listing, currentS3ListingFile);
 113             }
 114             previousS3Listing = new ArrayList<>(currentS3Listing);
 115         } catch (Exception e) {
 116             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "Can't connect to the bucket");
 117             logger.debug("Can't connect to the bucket: {}", e.getMessage());
 118             return false;
 119         }
 120         return true;
 121     }
 122
 123     @Override
 124     public void dispose() {
 125         ScheduledFuture<?> executionJob = this.executionJob;
 126         if (executionJob != null) {
 127             executionJob.cancel(true);
 128             this.executionJob = null;
 129         }
 130     }
 131 }