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https://github.com/ClemensFischer/XAML-Map-Control.git
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Version 4.13.0
This commit is contained in:
ClemensF
parent
8b08d721d4
commit
8244ddb5c3
13 changed files with 625 additions and 739 deletions
216
FileDbCache/WPF/FileDbCache.WPF.cs
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216
FileDbCache/WPF/FileDbCache.WPF.cs
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@ -0,0 +1,216 @@
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// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
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// © 2019 Clemens Fischer
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// Licensed under the Microsoft Public License (Ms-PL)
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using System.Runtime.Caching;
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namespace MapControl.Caching
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{
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public partial class FileDbCache : ObjectCache
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{
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public FileDbCache(string path)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentException("The parameter path must not be null or empty.");
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}
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if (string.IsNullOrEmpty(Path.GetExtension(path)))
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{
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path = Path.Combine(path, "TileCache.fdb");
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}
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dbPath = path;
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Open();
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AppDomain.CurrentDomain.ProcessExit += (s, e) => Dispose();
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}
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public override string Name
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{
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get { return string.Empty; }
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}
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public override DefaultCacheCapabilities DefaultCacheCapabilities
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{
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get { return DefaultCacheCapabilities.AbsoluteExpirations | DefaultCacheCapabilities.SlidingExpirations; }
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}
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public override object this[string key]
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{
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get { return Get(key); }
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set { Set(key, value, null); }
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}
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protected override IEnumerator<KeyValuePair<string, object>> GetEnumerator()
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{
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throw new NotSupportedException("FileDbCache does not support the ability to enumerate items.");
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}
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public override CacheEntryChangeMonitor CreateCacheEntryChangeMonitor(IEnumerable<string> keys, string regionName = null)
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{
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throw new NotSupportedException("FileDbCache does not support the ability to create change monitors.");
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}
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public override long GetCount(string regionName = null)
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{
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if (regionName != null)
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{
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throw new NotSupportedException("FileDbCache does not support named regions.");
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}
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try
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{
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return fileDb.NumRecords;
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}
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catch (Exception ex)
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{
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Debug.WriteLine("FileDbCache.GetCount(): " + ex.Message);
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}
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return 0;
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}
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public override bool Contains(string key, string regionName = null)
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{
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if (regionName != null)
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{
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throw new NotSupportedException("FileDbCache does not support named regions.");
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}
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if (key == null)
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{
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throw new ArgumentNullException("The parameter key must not be null.");
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}
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try
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{
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return fileDb.GetRecordByKey(key, new string[0], false) != null;
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}
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catch (Exception ex)
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{
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Debug.WriteLine("FileDbCache.Contains(\"{0}\"): {1}", key, ex.Message);
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}
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return false;
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}
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public override object Get(string key, string regionName = null)
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{
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if (regionName != null)
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{
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throw new NotSupportedException("FileDbCache does not support named regions.");
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}
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if (key == null)
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{
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throw new ArgumentNullException("The parameter key must not be null.");
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}
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var record = GetRecordByKey(key);
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if (record == null)
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{
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return null;
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}
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return new ImageCacheItem
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{
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Buffer = (byte[])record[0],
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Expiration = (DateTime)record[1]
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};
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}
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public override CacheItem GetCacheItem(string key, string regionName = null)
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{
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var value = Get(key, regionName);
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return value != null ? new CacheItem(key, value) : null;
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}
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public override IDictionary<string, object> GetValues(IEnumerable<string> keys, string regionName = null)
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{
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return keys.ToDictionary(key => key, key => Get(key, regionName));
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}
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public override void Set(string key, object value, CacheItemPolicy policy, string regionName = null)
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{
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if (regionName != null)
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{
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throw new NotSupportedException("FileDbCache does not support named regions.");
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}
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if (key == null)
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{
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throw new ArgumentNullException("The parameter key must not be null.");
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}
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var imageCacheItem = value as ImageCacheItem;
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if (imageCacheItem == null || imageCacheItem.Buffer == null || imageCacheItem.Buffer.Length == 0)
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{
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throw new ArgumentException("The parameter value must be an ImageCacheItem with a non-empty Buffer.");
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}
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AddOrUpdateRecord(key, imageCacheItem.Buffer, imageCacheItem.Expiration);
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}
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public override void Set(string key, object value, DateTimeOffset absoluteExpiration, string regionName = null)
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{
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Set(key, value, new CacheItemPolicy { AbsoluteExpiration = absoluteExpiration }, regionName);
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}
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public override void Set(CacheItem item, CacheItemPolicy policy)
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{
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Set(item.Key, item.Value, policy, item.RegionName);
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}
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public override object AddOrGetExisting(string key, object value, CacheItemPolicy policy, string regionName = null)
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{
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var oldValue = Get(key, regionName);
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Set(key, value, policy);
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return oldValue;
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}
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public override object AddOrGetExisting(string key, object value, DateTimeOffset absoluteExpiration, string regionName = null)
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{
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return AddOrGetExisting(key, value, new CacheItemPolicy { AbsoluteExpiration = absoluteExpiration }, regionName);
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}
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public override CacheItem AddOrGetExisting(CacheItem item, CacheItemPolicy policy)
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{
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var oldItem = GetCacheItem(item.Key, item.RegionName);
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Set(item, policy);
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return oldItem;
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}
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public override object Remove(string key, string regionName = null)
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{
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var oldValue = Get(key, regionName);
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if (oldValue != null)
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{
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try
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{
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fileDb.DeleteRecordByKey(key);
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}
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catch (Exception ex)
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{
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Debug.WriteLine("FileDbCache.Remove(\"{0}\"): {1}", key, ex.Message);
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}
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}
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return oldValue;
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}
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}
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}
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@ -44,7 +44,10 @@
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<Reference Include="System.Runtime.Caching" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="FileDbCache.cs" />
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<Compile Include="..\Shared\FileDbCache.cs">
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<Link>FileDbCache.cs</Link>
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</Compile>
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<Compile Include="FileDbCache.WPF.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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</ItemGroup>
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<ItemGroup>
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@ -1,392 +0,0 @@
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// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
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// © 2019 Clemens Fischer
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// Licensed under the Microsoft Public License (Ms-PL)
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using FileDbNs;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using System.Runtime.Caching;
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namespace MapControl.Caching
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{
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/// <summary>
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/// ObjectCache implementation based on FileDb, a free and simple No-SQL database by EzTools Software.
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/// See http://www.eztools-software.com/tools/filedb/.
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/// </summary>
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public sealed class FileDbCache : ObjectCache, IDisposable
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{
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private const string keyField = "Key";
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private const string valueField = "Value";
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private const string expiresField = "Expires";
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private readonly FileDb fileDb = new FileDb();
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private readonly string dbPath;
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public FileDbCache(string path, bool autoFlush = true, int autoCleanThreshold = -1)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentException("The parameter path must not be null or empty.");
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}
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if (string.IsNullOrEmpty(Path.GetExtension(path)))
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{
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path = Path.Combine(path, "TileCache.fdb");
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}
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dbPath = path;
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fileDb.AutoFlush = autoFlush;
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fileDb.AutoCleanThreshold = autoCleanThreshold;
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try
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{
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fileDb.Open(dbPath, false);
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Debug.WriteLine("FileDbCache: Opened database with {0} cached items in {1}", fileDb.NumRecords, dbPath);
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Clean();
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}
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catch
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{
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CreateDatabase();
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}
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AppDomain.CurrentDomain.ProcessExit += (s, e) => Close();
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}
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public override string Name
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{
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get { return string.Empty; }
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}
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public override DefaultCacheCapabilities DefaultCacheCapabilities
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{
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get { return DefaultCacheCapabilities.AbsoluteExpirations | DefaultCacheCapabilities.SlidingExpirations; }
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}
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public override object this[string key]
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{
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get { return Get(key); }
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set { Set(key, value, null); }
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}
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protected override IEnumerator<KeyValuePair<string, object>> GetEnumerator()
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{
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throw new NotSupportedException("FileDbCache does not support the ability to enumerate items.");
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}
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public override CacheEntryChangeMonitor CreateCacheEntryChangeMonitor(IEnumerable<string> keys, string regionName = null)
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{
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throw new NotSupportedException("FileDbCache does not support the ability to create change monitors.");
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}
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public override long GetCount(string regionName = null)
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{
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if (regionName != null)
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{
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throw new NotSupportedException("The parameter regionName must be null.");
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}
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if (fileDb.IsOpen)
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{
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try
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{
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return fileDb.NumRecords;
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}
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catch (Exception ex)
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{
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Debug.WriteLine("FileDbCache: FileDb.NumRecords: " + ex.Message);
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}
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}
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return 0;
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}
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public override bool Contains(string key, string regionName = null)
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{
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if (key == null)
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{
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throw new ArgumentNullException("The parameter key must not be null.");
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}
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if (regionName != null)
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{
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throw new NotSupportedException("The parameter regionName must be null.");
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}
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if (fileDb.IsOpen)
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{
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try
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{
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return fileDb.GetRecordByKey(key, new string[0], false) != null;
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}
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catch (Exception ex)
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{
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Debug.WriteLine("FileDbCache: FileDb.GetRecordByKey(\"{0}\"): {1}", key, ex.Message);
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}
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}
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return false;
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}
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public override object Get(string key, string regionName = null)
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{
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if (key == null)
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{
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throw new ArgumentNullException("The parameter key must not be null.");
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}
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if (regionName != null)
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{
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throw new NotSupportedException("The parameter regionName must be null.");
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}
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if (fileDb.IsOpen)
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{
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try
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{
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var record = fileDb.GetRecordByKey(key, new string[] { valueField, expiresField }, false);
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if (record != null)
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{
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return new ImageCacheItem
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{
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Buffer = (byte[])record[0],
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Expiration = (DateTime)record[1]
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};
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}
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}
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catch (Exception ex)
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{
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Debug.WriteLine("FileDbCache: FileDb.GetRecordByKey(\"{0}\"): {1}", key, ex.Message);
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}
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}
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return null;
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}
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public override CacheItem GetCacheItem(string key, string regionName = null)
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{
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var value = Get(key, regionName);
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return value != null ? new CacheItem(key, value) : null;
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}
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public override IDictionary<string, object> GetValues(IEnumerable<string> keys, string regionName = null)
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{
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return keys.ToDictionary(key => key, key => Get(key, regionName));
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}
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public override void Set(string key, object value, CacheItemPolicy policy, string regionName = null)
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{
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if (key == null)
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{
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throw new ArgumentNullException("The parameter key must not be null.");
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}
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|
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if (regionName != null)
|
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{
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throw new NotSupportedException("The parameter regionName must be null.");
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}
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|
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var imageCacheItem = value as ImageCacheItem;
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|
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if (imageCacheItem == null || imageCacheItem.Buffer == null || imageCacheItem.Buffer.Length == 0)
|
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{
|
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throw new NotSupportedException("The parameter value must be an ImageCacheItem with a non-empty Buffer.");
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}
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if (fileDb.IsOpen && !AddOrUpdateRecord(key, imageCacheItem) && RepairDatabase())
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{
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AddOrUpdateRecord(key, imageCacheItem);
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}
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}
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public override void Set(string key, object value, DateTimeOffset absoluteExpiration, string regionName = null)
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{
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Set(key, value, new CacheItemPolicy { AbsoluteExpiration = absoluteExpiration }, regionName);
|
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}
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public override void Set(CacheItem item, CacheItemPolicy policy)
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{
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Set(item.Key, item.Value, policy, item.RegionName);
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}
|
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|
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public override object AddOrGetExisting(string key, object value, CacheItemPolicy policy, string regionName = null)
|
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{
|
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var oldValue = Get(key, regionName);
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|
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Set(key, value, policy);
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|
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return oldValue;
|
||||
}
|
||||
|
||||
public override object AddOrGetExisting(string key, object value, DateTimeOffset absoluteExpiration, string regionName = null)
|
||||
{
|
||||
return AddOrGetExisting(key, value, new CacheItemPolicy { AbsoluteExpiration = absoluteExpiration }, regionName);
|
||||
}
|
||||
|
||||
public override CacheItem AddOrGetExisting(CacheItem item, CacheItemPolicy policy)
|
||||
{
|
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var oldItem = GetCacheItem(item.Key, item.RegionName);
|
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|
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Set(item, policy);
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|
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return oldItem;
|
||||
}
|
||||
|
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public override object Remove(string key, string regionName = null)
|
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{
|
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var oldValue = Get(key, regionName);
|
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|
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if (oldValue != null)
|
||||
{
|
||||
try
|
||||
{
|
||||
fileDb.DeleteRecordByKey(key);
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Debug.WriteLine("FileDbCache: FileDb.DeleteRecordByKey(\"{0}\"): {1}", key, ex.Message);
|
||||
}
|
||||
}
|
||||
|
||||
return oldValue;
|
||||
}
|
||||
|
||||
public void Dispose()
|
||||
{
|
||||
Close();
|
||||
}
|
||||
|
||||
public void Flush()
|
||||
{
|
||||
if (fileDb.IsOpen)
|
||||
{
|
||||
fileDb.Flush();
|
||||
}
|
||||
}
|
||||
|
||||
public void Clean()
|
||||
{
|
||||
if (fileDb.IsOpen)
|
||||
{
|
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int deleted = fileDb.DeleteRecords(new FilterExpression(expiresField, DateTime.UtcNow, ComparisonOperatorEnum.LessThan));
|
||||
|
||||
if (deleted > 0)
|
||||
{
|
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Debug.WriteLine("FileDbCache: Deleted {0} expired items", deleted);
|
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fileDb.Clean();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private void Close()
|
||||
{
|
||||
if (fileDb.IsOpen)
|
||||
{
|
||||
fileDb.Close();
|
||||
}
|
||||
}
|
||||
|
||||
private void CreateDatabase()
|
||||
{
|
||||
Close();
|
||||
|
||||
if (File.Exists(dbPath))
|
||||
{
|
||||
File.Delete(dbPath);
|
||||
}
|
||||
else
|
||||
{
|
||||
Directory.CreateDirectory(Path.GetDirectoryName(dbPath));
|
||||
}
|
||||
|
||||
fileDb.Create(dbPath, new Field[]
|
||||
{
|
||||
new Field(keyField, DataTypeEnum.String) { IsPrimaryKey = true },
|
||||
new Field(valueField, DataTypeEnum.Byte) { IsArray = true },
|
||||
new Field(expiresField, DataTypeEnum.DateTime)
|
||||
});
|
||||
|
||||
Debug.WriteLine("FileDbCache: Created database " + dbPath);
|
||||
}
|
||||
|
||||
private bool RepairDatabase()
|
||||
{
|
||||
try
|
||||
{
|
||||
fileDb.Reindex();
|
||||
return true;
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Debug.WriteLine("FileDbCache: FileDb.Reindex(): " + ex.Message);
|
||||
}
|
||||
|
||||
try
|
||||
{
|
||||
CreateDatabase();
|
||||
return true;
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Debug.WriteLine("FileDbCache: Failed creating database {0}: {1}", dbPath, ex.Message);
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
private bool AddOrUpdateRecord(string key, ImageCacheItem imageCacheItem)
|
||||
{
|
||||
var fieldValues = new FieldValues(3);
|
||||
fieldValues.Add(valueField, imageCacheItem.Buffer);
|
||||
fieldValues.Add(expiresField, imageCacheItem.Expiration);
|
||||
|
||||
bool recordExists;
|
||||
|
||||
try
|
||||
{
|
||||
recordExists = fileDb.GetRecordByKey(key, new string[0], false) != null;
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Debug.WriteLine("FileDbCache: FileDb.GetRecordByKey(\"{0}\"): {1}", key, ex.Message);
|
||||
return false;
|
||||
}
|
||||
|
||||
if (recordExists)
|
||||
{
|
||||
try
|
||||
{
|
||||
fileDb.UpdateRecordByKey(key, fieldValues);
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Debug.WriteLine("FileDbCache: FileDb.UpdateRecordByKey(\"{0}\"): {1}", key, ex.Message);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
try
|
||||
{
|
||||
fieldValues.Add(keyField, key);
|
||||
fileDb.AddRecord(fieldValues);
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Debug.WriteLine("FileDbCache: FileDb.AddRecord(\"{0}\"): {1}", key, ex.Message);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
//Debug.WriteLine("FileDbCache: Writing \"{0}\", Expires {1}", key, imageCacheItem.Expiration.ToLocalTime());
|
||||
return true;
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue