public async Task <TValue> AddOrUpdate(
TKey key,
Func <TKey, Task <TValue> > addFactory,
Func <TKey, TValue, Task <TValue> > updateFactory,
CancellationToken token)
{
var keyContent = await KeyConverter.Convert(key, token);
var keyRecord = new KeyRecord(
id: keyContent.GetSha1(),
type: KeyType,
content: keyContent);
var valueRecord = await backedStorage.AddOrUpdate(
keyRecord,
addFactory : async _ =>
{
var value = await addFactory(key);
var content = await ValueConverter.Convert(value, token);
var audit = new Audit(diagnosticContext.CorrelationId, diagnosticContext.User);
return(new ValueRecord(ValueType, content, audit));
},
updateFactory : async(_, old) =>
{
var oldValue = await ValueConverter.Convert(old.Content, token);
var newValue = await updateFactory(key, oldValue);
var content = await ValueConverter.Convert(newValue, token);
var audit = new Audit(diagnosticContext.CorrelationId, diagnosticContext.User);
return(new ValueRecord(ValueType, content, audit));
},
token);
return(await ValueConverter.Convert(valueRecord.Content, token));
}