/// <summary>
/// Attempts to load a byte array from the medium.
/// </summary>
/// <param name="cacheKey">The cache key.</param>
/// <param name="persistedItem">The persisted item.</param>
/// <returns>true if successful, false otherwise.</returns>
public bool TryLoad(string cacheKey, out PersistedItem persistedItem)
{
// Sanitize
if (string.IsNullOrWhiteSpace(cacheKey))
{
throw new ArgumentException("cannot be null, empty, or white space", "cacheKey");
}
// Find the right file
var cacheKeyHashCode = CalculateHash(cacheKey);
foreach (var fileName in Directory.GetFiles(_persistenceDirectory, string.Format("{0}-*", cacheKeyHashCode)))
{
byte[] file = null;
// Get the lock
var cacheKeyLock = _modulusLockDictionary[cacheKeyHashCode % _modulusLockDictionary.Count];
cacheKeyLock.EnterReadLock();
try
{
file = File.ReadAllBytes(fileName);
}
finally
{
cacheKeyLock.ExitReadLock();
}
var deserialized = (PersistedItem)Deserialize(file);
if (string.Equals(cacheKey, deserialized.CacheKey))
{
persistedItem = deserialized;
return(true);
}
}
// Failed
persistedItem = null;
return(false);
}
/// <summary>
/// Attempts to load a byte array from the medium.
/// </summary>
/// <param name="cacheKey">The cache key.</param>
/// <param name="persistedItem">The persisted item.</param>
/// <returns>true if successful, false otherwise.</returns>
public bool TryLoad(string cacheKey, out PersistedItem persistedItem)
{
// Sanitize
if (string.IsNullOrWhiteSpace(cacheKey))
{
throw new ArgumentException("cannot be null, empty, or white space", "cacheKey");
}
// Find the right file
var cacheKeyHashCode = CalculateHash(cacheKey);
foreach (var fileName in Directory.GetFiles(_persistenceDirectory, string.Format("{0}-*", cacheKeyHashCode)))
{
byte[] file = null;
// Get the lock
var cacheKeyLock = _modulusLockDictionary[cacheKeyHashCode % _modulusLockDictionary.Count];
cacheKeyLock.EnterReadLock();
try
{
file = File.ReadAllBytes(fileName);
}
finally
{
cacheKeyLock.ExitReadLock();
}
var deserialized = (PersistedItem)Deserialize(file);
if (string.Equals(cacheKey, deserialized.CacheKey))
{
persistedItem = deserialized;
return true;
}
}
// Failed
persistedItem = null;
return false;
}
/// <summary>
/// Persists a byte array to the medium.
/// </summary>
/// <param name="persistedItem">The persisted item.</param>
public void Persist(PersistedItem persistedItem)
{
// Sanitize
if (persistedItem == null)
{
throw new ArgumentNullException("persistedItem");
}
var cacheKeyHashCode = CalculateHash(persistedItem.CacheKey);
var filePath = Path.Combine(_persistenceDirectory, string.Format("{0}-{1}", cacheKeyHashCode, CalculateHash(persistedItem.Value)));
// Get the lock
var cacheKeyLock = _modulusLockDictionary[cacheKeyHashCode % _modulusLockDictionary.Count];
cacheKeyLock.EnterWriteLock();
try
{
File.WriteAllBytes(filePath, Serialize(persistedItem));
}
finally
{
cacheKeyLock.ExitWriteLock();
}
}
/// <summary>
/// Persists a byte array to the medium.
/// </summary>
/// <param name="persistedItem">The persisted item.</param>
public void Persist(PersistedItem persistedItem)
{
// Sanitize
if (persistedItem == null)
{
throw new ArgumentNullException("persistedItem");
}
var cacheKeyHashCode = CalculateHash(persistedItem.CacheKey);
var filePath = Path.Combine(_persistenceDirectory, string.Format("{0}-{1}", cacheKeyHashCode, CalculateHash(persistedItem.Value)));
// Get the lock
var cacheKeyLock = _modulusLockDictionary[cacheKeyHashCode % _modulusLockDictionary.Count];
cacheKeyLock.EnterWriteLock();
try
{
File.WriteAllBytes(filePath, Serialize(persistedItem));
}
finally
{
cacheKeyLock.ExitWriteLock();
}
}
