public void AddCacheControl(CacheControlPayload payload)
{
if (payload.MaxAge == -1)
{
// ignore unknow cache
return;
}
if (MaxAge == -1)
{
MaxAge = payload.MaxAge;
}
else
{
MaxAge = Math.Min(MaxAge, payload.MaxAge);
}
}
public async Task <object> Resolve(
ResolveFieldContext context,
FieldMiddlewareDelegate next)
{
var _cachePolicy = (ICachePolicy)((IServiceProvider)context.UserContext["serviceProvider"]).GetService(typeof(ICachePolicy));
CacheControlPayload cacheControlPayload = null;
// check if the field contains cache attribute
object tempValue;
if (context.FieldDefinition.Metadata.TryGetValue(CacheControlAttribute.MetadataKey, out tempValue))
{
cacheControlPayload = tempValue as CacheControlPayload;
}
// check if the field type has cache attriubute
else
{
IGraphType returnType;
if (context.ReturnType is ListGraphType list)
{
returnType = list.ResolvedType;
}
else
{
returnType = context.ReturnType;
}
if (returnType.Metadata.TryGetValue(CacheControlAttribute.MetadataKey, out tempValue))
{
cacheControlPayload = tempValue as CacheControlPayload;
}
}
if (cacheControlPayload == null)
{
// if the cache is not assigned by the user use the default
cacheControlPayload = new CacheControlPayload(-1, CacheControlScope.Public);
}
// add the cache payload to the cache policy
_cachePolicy.AddCacheControl(cacheControlPayload);
return(await next(context));
}