ClemensFischer/XAML-Map-Control
1
0
Fork 0
mirror of https://github.com/ClemensFischer/XAML-Map-Control.git synced 2025-12-06 07:12:04 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Update TileImageLoader.cs

Browse source
This commit is contained in:
ClemensFischer 2024-02-09 16:10:55 +01:00
parent a08cb58fed
commit 7ab95c3bed
1 changed files with 40 additions and 31 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

71
MapControl/Shared/TileImageLoader.cs
View file

@ -153,16 +153,7 @@ namespace MapControl
var cacheKey = string.Format(CultureInfo.InvariantCulture,
"{0}/{1}/{2}/{3}{4}", cacheName, tile.ZoomLevel, tile.Column, tile.Row, extension);
byte[] buffer = null;
try
{
buffer = await Cache.GetAsync(cacheKey).ConfigureAwait(false);
}
catch (Exception ex)
{
Debug.WriteLine($"TileImageLoader.Cache.GetAsync: {cacheKey}: {ex.Message}");
}
var buffer = await ReadCacheAsync(cacheKey).ConfigureAwait(false);
if (buffer == null)
{
@ -170,28 +161,9 @@ namespace MapControl
if (response != null)
{
buffer = response.Buffer ?? Array.Empty<byte>(); // cache even if null, when no tile available
buffer = response.Buffer;
var maxAge = response.MaxAge ?? DefaultCacheExpiration;
if (maxAge > MaxCacheExpiration)
{
maxAge = MaxCacheExpiration;
}
var cacheOptions = new DistributedCacheEntryOptions
{
AbsoluteExpirationRelativeToNow = maxAge
};
try
{
await Cache.SetAsync(cacheKey, buffer, cacheOptions).ConfigureAwait(false);
}
catch (Exception ex)
{
Debug.WriteLine($"TileImageLoader.Cache.SetAsync: {cacheKey}: {ex.Message}");
}
await WriteCacheAsync(cacheKey, buffer, response.MaxAge).ConfigureAwait(false);
}
}
//else Debug.WriteLine($"Cached: {cacheKey} - {buffer.Length} bytes");
@ -201,5 +173,42 @@ namespace MapControl
await LoadTileAsync(tile, () => ImageLoader.LoadImageAsync(buffer)).ConfigureAwait(false);
}
}
private static Task<byte[]> ReadCacheAsync(string cacheKey)
{
try
{
return Cache.GetAsync(cacheKey);
}
catch (Exception ex)
{
Debug.WriteLine($"TileImageLoader.Cache.GetAsync: {cacheKey}: {ex.Message}");
return Task.FromResult<byte[]>(null);
}
}
private static Task WriteCacheAsync(string cacheKey, byte[] buffer, TimeSpan? expiration)
{
if (!expiration.HasValue)
{
expiration = DefaultCacheExpiration;
}
else if (expiration > MaxCacheExpiration)
{
expiration = MaxCacheExpiration;
}
try
{
return 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;
}
}
}
}