public static IPostService CreatePostService(Container parentContainer, Container configurationContainer)
{
var container = new Container();
var config = configurationContainer.GetInstance <INewsFeedConfiguration>();
ICacheService <PostId, Post> postCache = CacheServiceBuilder <PostId, Post> .CreateService(config.PostInvalidationTime,
CacheItemPriority.NotRemovable);
ICacheService <string, IEnumerable <PostSummary> > postSummaryCache =
CacheServiceBuilder <string, IEnumerable <PostSummary> > .CreateService(config.SummariesInvalidationTime,
CacheItemPriority.Default);
container.RegisterInstance(SourceProvider.GetPostSource(parentContainer));
container.Register <IPostService, PostServiceCache>();
container.RegisterInstance(postCache);
container.RegisterInstance(postSummaryCache);
container.Verify();
return(container.GetInstance <IPostService>());
}