public async Task <IReadOnlyList <Document> > GetDocumentsAsync(IEnumerable <string> documentIds)
{
var documents = new List <KeyValuePair <string, Document> >();
var missingIds = new List <string>();
foreach (string docId in documentIds)
{
string key = LocalCacheKeys.Document(docId);
bool cached = _cache.TryGetValue(key, out Document cachedDoc);
documents.Add(new KeyValuePair <string, Document>(docId, cachedDoc));
if (!cached)
{
missingIds.Add(docId);
}
}
List <Document> missing = await _context.GetDocumentsAsync(missingIds);
List <Document> results = documents.GroupJoin(missing,
d => d.Key,
m => m.Id,
(d, m) => d.Value ?? m.FirstOrDefault())
.Where(d => d != null)
.ToList();
foreach (var missingDoc in missing)
{
string key = LocalCacheKeys.Document(missingDoc.Id);
_cache.Set(key, missingDoc, TimeSpan.FromMinutes(5));
}
return(results);
}
public async Task <IActionResult> Test([FromServices] DocumentContext documentContext)
{
var docs = await documentContext.GetDocumentsAsync(new[] { "1", "2" });
return(Ok(docs));
}