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https://github.com/ClemensFischer/XAML-Map-Control.git
synced 2026-04-04 22:18:56 +00:00
Minor code improvements
This commit is contained in:
ClemensF
parent
6b25260536
commit
472658a6d9
19 changed files with 301 additions and 175 deletions
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@ -1,5 +1,6 @@
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using System;
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using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.Diagnostics;
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using System.IO;
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using System.Runtime.Caching;
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@ -18,25 +19,61 @@ namespace Caching
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private const string expiresField = "Expires";
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private readonly BinaryFormatter formatter = new BinaryFormatter();
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private readonly FileDb fileDb = new FileDb();
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private readonly FileDb fileDb = new FileDb { AutoFlush = false, AutoCleanThreshold = -1 };
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private readonly string name;
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private readonly string path;
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public FileDbCache(string name, string path)
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public FileDbCache(string name, NameValueCollection config)
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: this(name, config["directory"])
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{
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if (string.IsNullOrEmpty(path))
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string autoFlush = config["autoFlush"];
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string autoCleanThreshold = config["autoCleanThreshold"];
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if (autoFlush != null)
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{
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throw new ArgumentException("The parameter path must not be null or empty.");
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try
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{
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fileDb.AutoFlush = bool.Parse(autoFlush);
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}
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catch (Exception ex)
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{
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throw new ArgumentException("The configuration parameter autoFlush must be a boolean value.", ex);
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}
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}
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if (autoCleanThreshold != null)
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{
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try
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{
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fileDb.AutoCleanThreshold = int.Parse(autoCleanThreshold);
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}
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catch (Exception ex)
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{
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throw new ArgumentException("The configuration parameter autoCleanThreshold must be an integer value.", ex);
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}
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}
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}
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public FileDbCache(string name, string directory)
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{
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if (string.IsNullOrEmpty(name))
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{
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throw new ArgumentException("The parameter name must not be null or empty.");
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}
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if (string.IsNullOrEmpty(directory))
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{
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throw new ArgumentException("The parameter directory must not be null or empty.");
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}
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this.name = name;
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path = Path.Combine(directory, name);
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if (string.IsNullOrEmpty(Path.GetExtension(path)))
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{
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path += ".fdb";
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}
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this.name = name;
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this.path = path;
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try
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{
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fileDb.Open(path, false);
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@ -46,7 +83,7 @@ namespace Caching
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CreateDatebase();
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}
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Trace.TraceInformation("FileDbCache created with {0} cached items", fileDb.NumRecords);
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Trace.TraceInformation("FileDbCache: Opened database with {0} cached items in {1}", fileDb.NumRecords, path);
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}
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public bool AutoFlush
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@ -96,21 +133,24 @@ namespace Caching
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long count = 0;
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try
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if (fileDb.IsOpen)
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{
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count = fileDb.NumRecords;
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}
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catch
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{
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if (CheckReindex())
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try
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{
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count = fileDb.NumRecords;
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}
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catch (Exception ex1)
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{
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Trace.TraceWarning("FileDbCache: FileDb.NumRecords failed: {0}", ex1.Message);
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try
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{
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fileDb.Reindex();
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count = fileDb.NumRecords;
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}
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catch
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catch (Exception ex2)
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{
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CreateDatebase();
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Trace.TraceWarning("FileDbCache: FileDb.Reindex() failed: {0}", ex2.Message);
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}
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}
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}
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@ -118,75 +158,64 @@ namespace Caching
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return count;
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}
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public override bool Contains(string key, string regionName = null)
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private Record GetRecord(string key)
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{
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if (regionName != null)
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Record record = null;
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if (fileDb.IsOpen)
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{
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throw new NotSupportedException("The parameter regionName must be null.");
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try
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{
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record = fileDb.GetRecordByKey(key, new string[] { valueField }, false);
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}
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catch (Exception ex1)
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{
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Trace.TraceWarning("FileDbCache: FileDb.GetRecordByKey(\"{0}\") failed: {1}", key, ex1.Message);
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try
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{
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fileDb.Reindex();
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record = fileDb.GetRecordByKey(key, new string[] { valueField }, false);
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}
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catch (Exception ex2)
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{
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Trace.TraceWarning("FileDbCache: FileDb.Reindex() failed: {0}", ex2.Message);
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}
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}
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}
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return record;
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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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bool contains = false;
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try
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if (regionName != null)
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{
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contains = fileDb.GetRecordByKey(key, new string[0], false) != null;
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}
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catch
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{
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if (CheckReindex())
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{
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try
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{
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contains = fileDb.GetRecordByKey(key, new string[0], false) != null;
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}
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catch
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{
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CreateDatebase();
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}
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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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return contains;
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return GetRecord(key) != null;
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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("The parameter regionName must be 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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object value = null;
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Record record = null;
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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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try
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{
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record = fileDb.GetRecordByKey(key, new string[] { valueField }, false);
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}
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catch
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{
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if (CheckReindex())
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{
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try
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{
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record = fileDb.GetRecordByKey(key, new string[] { valueField }, false);
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}
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catch
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{
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CreateDatebase();
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}
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}
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}
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object value = null;
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Record record = GetRecord(key);
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if (record != null)
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{
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@ -197,16 +226,17 @@ namespace Caching
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value = formatter.Deserialize(stream);
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}
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}
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catch (Exception exc)
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catch (Exception ex1)
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{
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Trace.TraceWarning("FileDbCache.Get({0}): {1}", key, exc.Message);
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Trace.TraceWarning("FileDbCache: Failed deserializing item \"{0}\": {1}", key, ex1.Message);
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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
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catch (Exception ex2)
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{
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Trace.TraceWarning("FileDbCache: FileDb.DeleteRecordByKey(\"{0}\") failed: {1}", key, ex2.Message);
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}
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}
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}
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@ -239,9 +269,9 @@ namespace Caching
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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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if (key == null)
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{
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throw new NotSupportedException("The parameter regionName must be null.");
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throw new ArgumentNullException("The parameter key must not be null.");
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}
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if (value == null)
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@ -249,53 +279,57 @@ namespace Caching
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throw new ArgumentNullException("The parameter value must not be null.");
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}
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if (key == null)
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if (regionName != null)
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{
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throw new ArgumentNullException("The parameter key must not be null.");
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throw new NotSupportedException("The parameter regionName must be null.");
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}
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byte[] valueBuffer = null;
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try
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if (fileDb.IsOpen)
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{
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using (MemoryStream stream = new MemoryStream())
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{
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formatter.Serialize(stream, value);
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valueBuffer = stream.ToArray();
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}
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}
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catch (Exception exc)
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{
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Trace.TraceWarning("FileDbCache.Set({0}): {1}", key, exc.Message);
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}
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if (valueBuffer != null)
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{
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DateTime expires = DateTime.MaxValue;
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if (policy.AbsoluteExpiration != InfiniteAbsoluteExpiration)
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{
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expires = policy.AbsoluteExpiration.DateTime;
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}
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else if (policy.SlidingExpiration != NoSlidingExpiration)
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{
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expires = DateTime.UtcNow + policy.SlidingExpiration;
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}
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byte[] valueBuffer = null;
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try
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{
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AddOrUpdateRecord(key, valueBuffer, expires);
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}
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catch
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{
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if (CheckReindex())
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using (MemoryStream stream = new MemoryStream())
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{
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formatter.Serialize(stream, value);
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valueBuffer = stream.ToArray();
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}
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}
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catch (Exception ex)
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{
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Trace.TraceWarning("FileDbCache: Failed serializing item \"{0}\": {1}", key, ex.Message);
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}
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if (valueBuffer != null)
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{
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DateTime expires = DateTime.MaxValue;
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if (policy.AbsoluteExpiration != InfiniteAbsoluteExpiration)
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{
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expires = policy.AbsoluteExpiration.DateTime;
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}
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else if (policy.SlidingExpiration != NoSlidingExpiration)
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{
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expires = DateTime.UtcNow + policy.SlidingExpiration;
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}
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try
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{
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AddOrUpdateRecord(key, valueBuffer, expires);
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}
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catch (Exception ex1)
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{
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Trace.TraceWarning("FileDbCache: FileDb.UpdateRecordByKey(\"{0}\") failed: {1}", key, ex1.Message);
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try
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{
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fileDb.Reindex();
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AddOrUpdateRecord(key, valueBuffer, expires);
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}
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catch
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catch (Exception ex2)
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{
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Trace.TraceWarning("FileDbCache: FileDb.Reindex() failed: {0}, creating new database", ex2.Message);
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CreateDatebase();
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AddOrUpdateRecord(key, valueBuffer, expires);
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}
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@ -343,8 +377,9 @@ namespace Caching
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{
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fileDb.DeleteRecordByKey(key);
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}
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catch
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catch (Exception ex)
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{
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Trace.TraceWarning("FileDbCache: FileDb.DeleteRecordByKey(\"{0}\") failed: {1}", key, ex.Message);
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}
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}
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@ -357,9 +392,9 @@ namespace Caching
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{
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fileDb.Flush();
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}
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catch
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catch (Exception ex)
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{
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CheckReindex();
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Trace.TraceWarning("FileDbCache: FileDb.Flush() failed: {0}", ex.Message);
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}
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}
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@ -369,40 +404,29 @@ namespace Caching
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{
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fileDb.Clean();
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}
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catch
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catch (Exception ex)
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{
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CheckReindex();
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Trace.TraceWarning("FileDbCache: FileDb.Clean() failed: {0}", ex.Message);
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}
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}
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public void Dispose()
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{
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try
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{
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fileDb.DeleteRecords(new FilterExpression(expiresField, DateTime.UtcNow, EqualityEnum.LessThanOrEqual));
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Trace.TraceInformation("FileDbCache has deleted {0} expired items", fileDb.NumDeleted);
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fileDb.Clean();
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fileDb.Close();
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}
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catch
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{
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if (CheckReindex())
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{
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fileDb.Close();
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}
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}
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}
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private bool CheckReindex()
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{
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if (fileDb.IsOpen)
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{
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Trace.TraceWarning("FileDbCache is reindexing the cache database");
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fileDb.Reindex();
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return true;
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}
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try
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{
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fileDb.DeleteRecords(new FilterExpression(expiresField, DateTime.UtcNow, EqualityEnum.LessThanOrEqual));
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Trace.TraceInformation("FileDbCache: Deleting {0} expired items", fileDb.NumDeleted);
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fileDb.Clean();
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}
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catch
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{
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fileDb.Reindex();
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}
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return false;
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fileDb.Close();
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}
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}
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private void CreateDatebase()
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