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Improved Task usage

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ClemensFischer 2024-08-31 11:55:59 +02:00
parent cbe2751db7
commit 4e753ae718
10 changed files with 30 additions and 39 deletions
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30
MapControl/Shared/TileImageLoader.cs
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@ -62,7 +62,7 @@ namespace MapControl
/// If tileSource.UriFormat starts with "http" and cacheName is a non-empty string,
/// tile images will be cached in the TileImageLoader's Cache - if that is not null.
/// </summary>
public Task LoadTilesAsync(IEnumerable<Tile> tiles, TileSource tileSource, string cacheName, IProgress<double> progress)
public async Task LoadTilesAsync(IEnumerable<Tile> tiles, TileSource tileSource, string cacheName, IProgress<double> progress)
{
pendingTiles?.Clear();
@ -102,35 +102,33 @@ namespace MapControl
tasks[i] = Task.Run(LoadTilesFromQueueAsync);
}
return Task.WhenAll(tasks);
await Task.WhenAll(tasks);
}
}
return Task.CompletedTask;
}
private static Task LoadTileAsync(Tile tile, TileSource tileSource, string cacheName)
private static async Task LoadTileAsync(Tile tile, TileSource tileSource, string cacheName)
{
try
{
if (string.IsNullOrEmpty(cacheName))
{
return LoadTileAsync(tile, () => tileSource.LoadImageAsync(tile.Column, tile.Row, tile.ZoomLevel));
await LoadTileAsync(tile, () => tileSource.LoadImageAsync(tile.Column, tile.Row, tile.ZoomLevel));
}
var uri = tileSource.GetUri(tile.Column, tile.Row, tile.ZoomLevel);
if (uri != null)
else
{
return LoadCachedTileAsync(tile, uri, cacheName);
var uri = tileSource.GetUri(tile.Column, tile.Row, tile.ZoomLevel);
if (uri != null)
{
await LoadCachedTileAsync(tile, uri, cacheName);
}
}
}
catch (Exception ex)
{
Debug.WriteLine($"TileImageLoader: {tile.ZoomLevel}/{tile.Column}/{tile.Row}: {ex.Message}");
}
return Task.CompletedTask;
}
private static async Task LoadCachedTileAsync(Tile tile, Uri uri, string cacheName)
@ -178,7 +176,7 @@ namespace MapControl
}
}
private static Task WriteCacheAsync(string cacheKey, byte[] buffer, TimeSpan? expiration)
private static async Task WriteCacheAsync(string cacheKey, byte[] buffer, TimeSpan? expiration)
{
if (!expiration.HasValue)
{
@ -191,15 +189,13 @@ namespace MapControl
try
{
return Cache.SetAsync(cacheKey,
await Cache.SetAsync(cacheKey,
buffer ?? Array.Empty<byte>(), // cache even if null, when no tile available
new DistributedCacheEntryOptions { AbsoluteExpirationRelativeToNow = expiration });
}
catch (Exception ex)
{
Debug.WriteLine($"TileImageLoader.Cache.SetAsync: {cacheKey}: {ex.Message}");
return Task.CompletedTask;
}
}
}