public async Task <IAsyncEnumerable <TKey> > CreateKeyEnumerableAsync(ITransaction tx, EnumerationMode enumerationMode, TimeSpan timeout, CancellationToken cancellationToken)
{
var keys = new System.Collections.Generic.List <TKey>();
try
{
BeginTransaction(tx);
foreach (var key in Dictionary.Keys)
{
await LockManager.AcquireLock(tx.TransactionId, key, LockMode.Default, timeout, cancellationToken);
keys.Add(key);
}
if (enumerationMode == EnumerationMode.Ordered)
{
keys.Sort();
}
IAsyncEnumerable <TKey> result = new MockAsyncEnumerable <TKey>(keys);
return(result);
}
catch
{
foreach (var key in keys)
{
LockManager.ReleaseLock(tx.TransactionId, key);
}
throw;
}
}
public TransactedConcurrentDictionary(Uri uri, Func <DictionaryChange, bool> changeCallback)
: base(uri)
{
Dictionary = new ConcurrentDictionary <TKey, TValue>();
LockManager = new LockManager <TKey, long>();
OnDictionaryChanged = changeCallback;
}
public TransactedConcurrentDictionary(Uri uri, EventHandler <DictionaryChangedEvent <TKey, TValue> > changeCallback = null)
: base(uri)
{
Dictionary = new ConcurrentDictionary <TKey, TValue>();
LockManager = new LockManager <TKey, long>();
if (changeCallback != null)
{
InternalDictionaryChanged += changeCallback;
}
}
public async Task <IAsyncEnumerable <System.Collections.Generic.KeyValuePair <TKey, TValue> > > CreateEnumerableAsync(ITransaction tx, Func <TKey, bool> filter, EnumerationMode enumerationMode)
{
var keys = new System.Collections.Generic.List <TKey>();
try
{
BeginTransaction(tx);
foreach (var key in Dictionary.Keys)
{
if (filter == null || filter(key))
{
await LockManager.AcquireLock(tx.TransactionId, key, LockMode.Default);
keys.Add(key);
}
}
if (enumerationMode == EnumerationMode.Ordered)
{
keys.Sort();
}
IAsyncEnumerable <System.Collections.Generic.KeyValuePair <TKey, TValue> > result = new MockAsyncEnumerable <System.Collections.Generic.KeyValuePair <TKey, TValue> >(keys.Select(k => new System.Collections.Generic.KeyValuePair <TKey, TValue>(k, Dictionary[k])));
return(result);
}
catch
{
foreach (var key in keys)
{
LockManager.ReleaseLock(tx.TransactionId, key);
}
throw;
}
}
