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.api.exception.APIException;
  28 import org.openhab.binding.folderwatcher.internal.common.WatcherCommon;
  29 import org.openhab.binding.folderwatcher.internal.config.S3BucketWatcherConfiguration;
  30 import org.openhab.core.OpenHAB;
  31 import org.openhab.core.io.net.http.HttpClientFactory;
  32 import org.openhab.core.thing.ChannelUID;
  33 import org.openhab.core.thing.Thing;
  34 import org.openhab.core.thing.ThingStatus;
  35 import org.openhab.core.thing.ThingStatusDetail;
  36 import org.openhab.core.thing.binding.BaseThingHandler;
  37 import org.openhab.core.types.Command;
  38 import org.openhab.core.types.RefreshType;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41
  42 /**
  43  * The {@link S3BucketWatcherHandler} is responsible for handling commands, which are
  44  * sent to one of the channels.
  45  *
  46  * @author Alexandr Salamatov - Initial contribution
  47  */
  48 @NonNullByDefault
  49 public class S3BucketWatcherHandler extends BaseThingHandler {
  50     private final Logger logger = LoggerFactory.getLogger(S3BucketWatcherHandler.class);
  51     private S3BucketWatcherConfiguration config = new S3BucketWatcherConfiguration();
  52     private File currentS3ListingFile = new File(OpenHAB.getUserDataFolder() + File.separator + "FolderWatcher"
  53             + File.separator + thing.getUID().getAsString().replace(':', '_') + ".data");
  54     private @Nullable ScheduledFuture<?> executionJob;
  55     private List<String> previousS3Listing = new ArrayList<>();
  56     private HttpClientFactory httpClientFactory;
  57     private @Nullable S3Actions s3;
  58
  59     public S3BucketWatcherHandler(Thing thing, HttpClientFactory httpClientFactory) {
  60         super(thing);
  61         this.httpClientFactory = httpClientFactory;
  62     }
  63
  64     @Override
  65     public void handleCommand(ChannelUID channelUID, Command command) {
  66         logger.debug("Channel {} triggered with command {}", channelUID.getId(), command);
  67         if (command instanceof RefreshType) {
  68             refreshS3BucketInformation();
  69         }
  70     }
  71
  72     @Override
  73     public void initialize() {
  74         config = getConfigAs(S3BucketWatcherConfiguration.class);
  75         try {
  76             if (config.s3Anonymous) {
  77                 s3 = new S3Actions(httpClientFactory, config.s3BucketName, config.awsRegion);
  78             } else {
  79                 s3 = new S3Actions(httpClientFactory, config.s3BucketName, config.awsRegion, config.awsKey,
  80                         config.awsSecret);
  81             }
  82         } catch (APIException e) {
  83             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.HANDLER_INITIALIZING_ERROR, e.getMessage());
  84             return;
  85         }
  86
  87         try {
  88             previousS3Listing = WatcherCommon.initStorage(currentS3ListingFile, config.s3BucketName);
  89         } catch (IOException e) {
  90             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, e.getMessage());
  91             logger.debug("Can't write file {}: {}", currentS3ListingFile, e.getMessage());
  92             return;
  93         }
  94
  95         if (refreshS3BucketInformation()) {
  96             if (config.pollIntervalS3 > 0) {
  97                 executionJob = scheduler.scheduleWithFixedDelay(this::refreshS3BucketInformation, config.pollIntervalS3,
  98                         config.pollIntervalS3, TimeUnit.SECONDS);
  99             } else {
 100                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 101                         "Polling interval must be greater then 0 seconds");
 102                 return;
 103             }
 104         }
 105     }
 106
 107     private boolean refreshS3BucketInformation() {
 108         List<String> currentS3Listing = new ArrayList<>();
 109         try {
 110             currentS3Listing = s3.listBucket(config.s3Path);
 111             updateStatus(ThingStatus.ONLINE);
 112             List<String> difS3Listing = new ArrayList<>(currentS3Listing);
 113             difS3Listing.removeAll(previousS3Listing);
 114             difS3Listing.forEach(file -> triggerChannel(CHANNEL_NEWFILE, file));
 115
 116             if (!difS3Listing.isEmpty()) {
 117                 WatcherCommon.saveNewListing(difS3Listing, currentS3ListingFile);
 118             }
 119             previousS3Listing = new ArrayList<>(currentS3Listing);
 120         } catch (Exception e) {
 121             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "Can't connect to the bucket");
 122             logger.debug("Can't connect to the bucket: {}", e.getMessage());
 123             return false;
 124         }
 125         return true;
 126     }
 127
 128     @Override
 129     public void dispose() {
 130         ScheduledFuture<?> executionJob = this.executionJob;
 131         if (executionJob != null) {
 132             executionJob.cancel(true);
 133             this.executionJob = null;
 134         }
 135     }
 136 }