public static IDataLoader <TKey, TValue[]> GroupDataLoader <TKey, TValue>(
this IResolverContext context,
FetchGroup <TKey, TValue> fetch,
string?key = null)
where TKey : notnull
{
if (context is null)
{
throw new ArgumentNullException(nameof(context));
}
if (fetch is null)
{
throw new ArgumentNullException(nameof(fetch));
}
IServiceProvider services = context.Services;
IDataLoaderRegistry reg = services.GetRequiredService <IDataLoaderRegistry>();
Func <FetchGroupedDataLoader <TKey, TValue> > createDataLoader =
() => new FetchGroupedDataLoader <TKey, TValue>(
services.GetRequiredService <IBatchScheduler>(),
fetch);
return(key is null
? reg.GetOrRegister(createDataLoader)
: reg.GetOrRegister(key, createDataLoader));
}
public FetchGroupedDataLoader(
IBatchScheduler batchScheduler,
FetchGroup <TKey, TValue> fetch)
: base(batchScheduler)
{
_fetch = fetch ?? throw new ArgumentNullException(nameof(fetch));
}
public void CheckFetchGroupInitializationWithExpressions()
{
FetchGroup <Mitarbeiter> fg = new FetchGroup <Mitarbeiter>(m => m.Vorname, m => m.Nachname);
Assert.AreEqual(fg.Count, 2, "Count should be 2");
Assert.AreEqual("Vorname", fg[0], "Name wrong #1");
Assert.AreEqual("Nachname", fg[1], "Name wrong #2");
}
public FetchGroupedDataLoader(FetchGroup <TKey, TValue> fetch)
: base(new DataLoaderOptions <TKey>
{
AutoDispatching = false,
Batching = true,
CacheSize = DataLoaderDefaults.CacheSize,
MaxBatchSize = DataLoaderDefaults.MaxBatchSize,
SlidingExpiration = TimeSpan.Zero
})
{
_fetch = fetch ?? throw new ArgumentNullException(nameof(fetch));
}
public static IDataLoader <TKey, TValue[]> GroupDataLoader <TKey, TValue>(
this IResolverContext context,
string key,
FetchGroup <TKey, TValue> fetch)
where TKey : notnull
{
if (string.IsNullOrEmpty(key))
{
throw new ArgumentException(
TypeResources.DataLoaderRegistry_KeyNullOrEmpty,
nameof(key));
}
return(GroupDataLoader(context, fetch, key));
}
public static bool Register <TKey, TValue>(
this IDataLoaderRegistry registry,
string key,
FetchGroup <TKey, TValue> fetch)
{
if (string.IsNullOrEmpty(key))
{
throw new ArgumentException(
TypeResources.DataLoaderRegistry_KeyNullOrEmpty,
nameof(key));
}
if (fetch == null)
{
throw new ArgumentNullException(nameof(fetch));
}
return(registry.Register(key, services =>
new FetchGroupedDataLoader <TKey, TValue>(fetch)));
}
GroupDataLoader <TKey, TValue>(
this IResolverContext context,
string key,
FetchGroup <TKey, TValue> fetch)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (string.IsNullOrEmpty(key))
{
throw new ArgumentException(
TypeResources.DataLoaderRegistry_KeyNullOrEmpty,
nameof(key));
}
if (fetch == null)
{
throw new ArgumentNullException(nameof(fetch));
}
return(GroupDataLoaderFactory(context, key, services => fetch));
}
public FetchGroupedDataLoader(FetchGroup <TKey, TValue> fetch)
{
_fetch = fetch ?? throw new ArgumentNullException(nameof(fetch));
}
