/// <summary>
/// Reset the cache expiry.
/// </summary>
public void Reset()
{
Hits = 0;
// Where the expiry is not set then set.
DateTime now = DateTime.Now;
if (Expiry == null)
{
DateTime time = now.Date;
while (time < now)
{
time = time.Add(_duration);
if (time.DayOfYear != now.DayOfYear)
{
time = now.Date.AddDays(1);
}
}
Expiry = CachePolicyManager.AddRandomizedOffsetToTime(time, _randomizerOffset);
return;
}
// Add duration; if result is tomorrow reset to start of day tomorrow plus offset.
DateTime temp = now.Add(_duration);
if (temp.DayOfYear != Expiry.Value.DayOfYear)
{
Expiry = CachePolicyManager.AddRandomizedOffsetToTime(temp, _randomizerOffset);
}
else
{
Expiry = temp;
}
}
/// <summary>
/// Reset the cache expiry.
/// </summary>
public void Reset()
{
DateTime now = Entities.Cleaner.Clean(DateTime.Now);
DateTime?expiry = now.Add(_duration);
if (_randomizerOffset.HasValue)
{
expiry = CachePolicyManager.AddRandomizedOffsetToTime(expiry.Value, _randomizerOffset.Value);
}
Expiry = expiry;
Hits = 0;
}
/// <summary>
/// Sets (configures) the <see cref="CachePolicyManager"/> using the <paramref name="config"/>.
/// </summary>
/// <param name="manager">The <see cref="CachePolicyManager"/>.</param>
/// <param name="config">The <see cref="CachePolicyConfig"/>.</param>
internal static void SetCachePolicyManager(CachePolicyManager manager, CachePolicyConfig config)
{
if (config == null)
{
return;
}
// Load the policies.
var isDefaultSet = false;
if (config.Policies == null)
{
return;
}
foreach (var pol in config.Policies)
{
if (string.IsNullOrEmpty(pol.Name))
{
throw new CachePolicyConfigException("A Policy has been defined with no Name.");
}
if (string.IsNullOrEmpty(pol.Policy))
{
throw new CachePolicyConfigException($"Policy '{pol.Name}' has been defined with no Type.");
}
try
{
var type = Type.GetType(pol.Policy) ?? throw new CachePolicyConfigException($"Policy '{pol.Name}' Type '{pol.Policy}' could not be loaded/instantiated.");
var policy = (ICachePolicy)Activator.CreateInstance(type);
LoadPolicyProperties(pol, type, policy);
LoadCaches(manager, pol, policy);
if (pol.IsDefault)
{
if (isDefaultSet)
{
throw new CachePolicyConfigException($"Policy '{pol.Name}' can not set DefaultPolicy where already set.");
}
isDefaultSet = true;
manager.DefaultPolicy = policy;
}
}
catch (CachePolicyConfigException) { throw; }
catch (Exception ex) { throw new CachePolicyConfigException($"Policy '{pol.Name}' Type '{pol.Policy}' could not be loaded/instantiated: {ex.Message}", ex); }
}
}
/// <summary>
/// Loads the cache type and policy configurations.
/// </summary>
private static void LoadCaches(CachePolicyConfigPolicy config, ICachePolicy policy)
{
if (config.Caches == null)
{
return;
}
foreach (var cache in config.Caches)
{
if (!string.IsNullOrEmpty(cache))
{
CachePolicyManager.Set(cache, policy);
}
}
}
/// <summary>
/// Reset the cache expiry.
/// </summary>
public void Reset()
{
DateTime now = DateTime.Now;
DateTime?expiry = now.Add(_duration);
if (!_maxExpiry.HasValue && _maxDuration.TotalMilliseconds > 0)
{
_maxExpiry = now.Add(_maxDuration);
}
if (_maxExpiry.HasValue && Expiry > _maxExpiry.Value)
{
expiry = _maxExpiry;
}
if (_randomizerOffset.HasValue)
{
expiry = CachePolicyManager.AddRandomizedOffsetToTime(expiry.Value, _randomizerOffset.Value);
}
Expiry = expiry;
Hits = 0;
}
/// <summary>
/// Initializes a new instance of the <see cref="CachePolicyManagerServiceHost"/> class.
/// </summary>
/// <param name="cachePolicyManager">The <see cref="CachePolicyManager"/>.</param>
/// <param name="serviceProvider">The <see cref="IServiceProvider"/>.</param>
/// <param name="logger">The <see cref="ILogger"/>.</param>
/// <param name="config">The <see cref="IConfiguration"/>; defaults to instance from the <paramref name="serviceProvider"/> where not specified.</param>
public CachePolicyManagerServiceHost(CachePolicyManager cachePolicyManager, IServiceProvider serviceProvider, ILogger logger, IConfiguration?config = null) : base(serviceProvider, logger, config)
=> _cachePolicyManager = Check.NotNull(cachePolicyManager, nameof(cachePolicyManager));
