/// <summary>
/// Initializes a new instance of the <see cref="ViewComponentDescriptor"/> class.
/// </summary>
/// <param name="isCacheable">if set to <c>true</c> [is cacheable].</param>
/// <param name="cacheStrategy">The cache strategy.</param>
/// <param name="cacheKeyGenerator">The cache key generator.</param>
public ViewComponentDescriptor(bool isCacheable, ViewComponentCache cacheStrategy, IViewComponentCacheKeyGenerator cacheKeyGenerator)
{
this.isCacheable = isCacheable;
this.cacheStrategy = cacheStrategy;
this.cacheKeyGenerator = cacheKeyGenerator;
}
/// <summary>
/// Initializes a new instance of the <see cref="ViewComponentDescriptor"/> class.
/// </summary>
/// <param name="isCacheable">if set to <c>true</c> [is cacheable].</param>
/// <param name="cacheStrategy">The cache strategy.</param>
/// <param name="cacheKeyGenerator">The cache key generator.</param>
public ViewComponentDescriptor(bool isCacheable, ViewComponentCache cacheStrategy, IViewComponentCacheKeyGenerator cacheKeyGenerator)
{
this.isCacheable = isCacheable;
this.cacheStrategy = cacheStrategy;
this.cacheKeyGenerator = cacheKeyGenerator;
}
/// <summary>
/// Creates a <see cref="ViewComponentDescriptor"/> by inspecting the
/// specified view component type.
/// </summary>
/// <param name="viewComponentType">Type of the view component.</param>
/// <returns></returns>
public ViewComponentDescriptor Collect(Type viewComponentType)
{
if (viewComponentType == null)
{
throw new ArgumentNullException("viewComponentType");
}
locker.AcquireReaderLock(-1);
try
{
if (type2Desc.ContainsKey(viewComponentType))
{
return(type2Desc[viewComponentType]);
}
}
finally
{
locker.ReleaseReaderLock();
}
var attrs = viewComponentType.GetCustomAttributes(typeof(ViewComponentDetailsAttribute), true);
ViewComponentDescriptor descriptor;
if (attrs.Length == 0)
{
descriptor = ViewComponentDescriptor.Empty;
}
else
{
var details = (ViewComponentDetailsAttribute)attrs[0];
IViewComponentCacheKeyGenerator generator = null;
if (details.Cache == ViewComponentCache.Always)
{
generator = new AlwaysCacheKeyGenerator();
}
else if (details.CacheKeyFactory != null)
{
try
{
generator = (IViewComponentCacheKeyGenerator)
Activator.CreateInstance(details.CacheKeyFactory);
}
catch (Exception ex)
{
throw new MonoRailException(
"Could not instantiate IViewComponentCacheKeyGenerator implementation or " +
"it does not implement this interface. Type: " + details.CacheKeyFactory.FullName, ex);
}
}
descriptor = new ViewComponentDescriptor(details.Cache != ViewComponentCache.Disabled, details.Cache, generator);
}
locker.UpgradeToWriterLock(-1);
try
{
type2Desc[viewComponentType] = descriptor;
}
finally
{
locker.ReleaseWriterLock();
}
return(descriptor);
}
