public static T GetProvider <T>(this IProviderGroup providerGroup, string name, char separator = '.')
where T : class
{
if (providerGroup == null)
{
throw new ArgumentNullException(nameof(providerGroup));
}
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentNullException(nameof(name));
}
IProviderGroup group = providerGroup;
string[] groups = name.Split(separator);
if (groups.Length < 1 || !MatchName(groups[0], providerGroup))
{
return(default(T));
}
for (int i = 1; group != null && i < groups.Length - 1; i++)
{
string groupName = groups[i];
group = group.Providers
.Select(kvp => kvp.Value as IProviderGroup)
.FirstOrDefault(provider => provider != null && MatchName(groupName, provider));
}
string providerName = groups.Last();
return(group?.Providers.Select(kvp => kvp.Value)
.FirstOrDefault(provider => MatchName(providerName, provider) && provider is T) as T);
}
public static T GetProvider <T>(this IServiceProvider serviceProvider, string name, char separator = '.')
where T : class
{
if (serviceProvider == null)
{
throw new ArgumentNullException(nameof(serviceProvider));
}
if (string.IsNullOrWhiteSpace(name))
{
throw new ArgumentNullException(nameof(name));
}
string[] groups = name.Split(separator);
switch (groups.Length)
{
case 0:
return(default(T));
case 1:
string providerName = groups[0];
return(serviceProvider.GetServices <IProvider>()
.FirstOrDefault(provider => provider is T && MatchName(providerName, provider)) as T);
default:
string groupName = groups[0];
IProviderGroup group = serviceProvider.GetServices <IProvider>()
.FirstOrDefault(provider => provider is IProviderGroup && MatchName(groupName, provider)) as IProviderGroup;
return(group?.GetProvider <T>(name, separator));
}
}
public static bool TryGetProvider <TKey, TProvider>(this IProviderGroup <TKey, TProvider> providerGroup, TKey key, out TProvider provider)
where TKey : IComparable <TKey>
where TProvider : class
{
provider = providerGroup.Providers.FirstOrDefault(kvp => kvp.Key.Equals(key)).Value;
return(provider != default(TProvider));
}
public static TProvider GetProvider <TKey, TProvider>(this IProviderGroup <TKey, TProvider> providerGroup, TKey key)
where TKey : IComparable <TKey>
where TProvider : class
{
TProvider provider;
return(providerGroup.TryGetProvider(key, out provider)
? provider
: default(TProvider));
}
public SomePersistentGrain(IRuntime runtime, ILoggerFactory loggerFactory, IProviderGroup <string, IStorageProvider> storageProviderGroup)
{
logger = loggerFactory.CreateLogger <AzureStorageProvider>();
// assuming grain know which provider it want's via attribute, or something.
storageProvider = storageProviderGroup.GetProvider("Azure");
}
