private async Task <bool> SafeAddOrReplaceWithMerging(TKey key, IAsyncCacheData <TKey, TValue> data,
CancellationToken token)
{
var dbdata = await _keyBasedFetcher.GetAsync(key, token).ConfigureAwait(false);
if (dbdata == null || dbdata.Count == 0)
{
return(false);
}
TValue value;
if (dbdata.Count == 1)
{
value = dbdata[0].Value;
data.AddOrReplace(key, value);
}
else
{
value = dbdata[0].Value;
for (var i = 1; i < dbdata.Count; i++)
{
TValue outVal;
if (dbdata[i].MergeCurrentDataForKeyConflict(value, out outVal))
{
value = outVal;
}
}
data.AddOrReplace(key, value);
}
return(true);
}
private async Task <bool> SafeAddOrReplaceWithoutMerging(TKey key, IAsyncCacheData <TKey, TValue> data,
CancellationToken token)
{
var hasRow = await _keyBasedFetcher.HasRowAsync(key, token).ConfigureAwait(false);
if (!hasRow)
{
return(false);
}
data.AddOrReplace(key, default(TValue));
return(true);
}
internal override void Merge(IAsyncCacheData <TKey, TValue> target, CancellationToken token)
{
for (var i = 0; i < SyncRoots.Length; i++)
{
var syncRoot = SyncRoots[i];
lock (syncRoot)
{
token.ThrowIfCancellationRequested();
target.AddOrReplace(_data[i].AsEnumerable());
}
}
}
