internal IChangeToken GetOrAddFilePathChangeToken(string filePath)
{
if (!_filePathTokenLookup.TryGetValue(filePath, out var tokenInfo))
{
var cancellationTokenSource = new CancellationTokenSource();
var cancellationChangeToken = new CancellationChangeToken(cancellationTokenSource.Token);
tokenInfo = new ChangeTokenInfo(cancellationTokenSource, cancellationChangeToken);
tokenInfo = _filePathTokenLookup.GetOrAdd(filePath, tokenInfo);
}
IChangeToken changeToken = tokenInfo.ChangeToken;
if (PollForChanges)
{
// The expiry of CancellationChangeToken is controlled by this type and consequently we can cache it.
// PollingFileChangeToken on the other hand manages its own lifetime and consequently we cannot cache it.
var pollingChangeToken = new PollingFileChangeToken(new FileInfo(Path.Combine(_root, filePath)));
if (UseActivePolling)
{
pollingChangeToken.ActiveChangeCallbacks = true;
pollingChangeToken.CancellationTokenSource = new CancellationTokenSource();
PollingChangeTokens.TryAdd(pollingChangeToken, pollingChangeToken);
}
changeToken = new CompositeChangeToken(
new[]
{
changeToken,
pollingChangeToken,
});
}
return(changeToken);
}
private IChangeToken GetOrAddWildcardChangeToken(string pattern)
{
ChangeTokenInfo tokenInfo;
if (!_wildcardTokenLookup.TryGetValue(pattern, out tokenInfo))
{
var cancellationTokenSource = new CancellationTokenSource();
var cancellationChangeToken = new CancellationChangeToken(cancellationTokenSource.Token);
var matcher = new Matcher(StringComparison.OrdinalIgnoreCase);
matcher.AddInclude(pattern);
tokenInfo = new ChangeTokenInfo(cancellationTokenSource, cancellationChangeToken, matcher);
tokenInfo = _wildcardTokenLookup.GetOrAdd(pattern, tokenInfo);
}
IChangeToken changeToken = tokenInfo.ChangeToken;
if (_pollForChanges)
{
// The expiry of CancellationChangeToken is controlled by this type and consequently we can cache it.
// PollingFileChangeToken on the other hand manages its own lifetime and consequently we cannot cache it.
changeToken = new CompositeChangeToken(
new[]
{
changeToken,
new PollingWildCardChangeToken(_root, pattern)
});
}
return(changeToken);
}
private IChangeToken GetOrAddFilePathChangeToken(string filePath)
{
ChangeTokenInfo tokenInfo;
if (!_filePathTokenLookup.TryGetValue(filePath, out tokenInfo))
{
var cancellationTokenSource = new CancellationTokenSource();
var cancellationChangeToken = new CancellationChangeToken(cancellationTokenSource.Token);
tokenInfo = new ChangeTokenInfo(cancellationTokenSource, cancellationChangeToken);
tokenInfo = _filePathTokenLookup.GetOrAdd(filePath, tokenInfo);
}
IChangeToken changeToken = tokenInfo.ChangeToken;
if (_pollForChanges)
{
// The expiry of CancellationChangeToken is controlled by this type and consequently we can cache it.
// PollingFileChangeToken on the other hand manages its own lifetime and consequently we cannot cache it.
changeToken = new CompositeChangeToken(
new[]
{
changeToken,
new PollingFileChangeToken(new FileInfo(Path.Combine(_root, filePath)))
});
}
return(changeToken);
}
private IChangeToken GetOrAddChangeToken(string filePath)
{
if (!FilePathTokenLookup.TryGetValue(filePath, out var tokenInfo))
{
var cancellationTokenSource = new CancellationTokenSource();
var cancellationChangeToken = new CancellationChangeToken(cancellationTokenSource.Token);
tokenInfo = new ChangeTokenInfo(cancellationTokenSource, cancellationChangeToken);
tokenInfo = FilePathTokenLookup.GetOrAdd(filePath, tokenInfo);
}
return(tokenInfo.ChangeToken);
}
private static void CancelToken(ChangeTokenInfo matchInfo)
{
if (matchInfo.TokenSource.IsCancellationRequested)
{
return;
}
Task.Factory.StartNew(
_cancelTokenSource,
matchInfo.TokenSource,
CancellationToken.None,
TaskCreationOptions.DenyChildAttach,
TaskScheduler.Default);
}
private static void CancelToken(ChangeTokenInfo matchInfo)
{
if (matchInfo.TokenSource.IsCancellationRequested)
{
return;
}
Task.Run(() =>
{
try
{
matchInfo.TokenSource.Cancel();
}
catch
{
}
});
}
private void SignalTokens(string[] keys)
{
foreach (var key in keys)
{
ChangeTokenInfo changeToken = null;
if (_matchInfoCache.TryRemove(key, out changeToken))
{
changeToken.TokenSource.Cancel();
}
//if (_matchInfoCache.TryGetValue(filter, out changeToken))
//{
// // return existing token for this file path.
// // yield return changeToken;
// //var inMemoryChangeToken = changeToken as InMemoryChangeToken;
// //if (inMemoryChangeToken != null)
// //{
// // yield return inMemoryChangeToken;
// //}
//}
}
}
private IChangeToken GetOrAddChangeToken(string key, Action <ChangeTokenInfo> onNewTokenAdded)
{
ChangeTokenInfo fileToken;
if (_matchInfoCache.TryGetValue(key, out fileToken))
{
// return existing token for this file path.
}
else
{
// var newToken = new InMemoryChangeToken();
// var newToken = tokenFactory();
var cancellationTokenSource = new CancellationTokenSource();
var cancellationChangeToken = new CancellationChangeToken(cancellationTokenSource.Token);
var tokenInfo = new ChangeTokenInfo(cancellationChangeToken, cancellationTokenSource);
// tokenInfo = _wildcardTokenLookup.GetOrAdd(pattern, tokenInfo);
fileToken = _matchInfoCache.GetOrAdd(key, tokenInfo);
onNewTokenAdded(fileToken);
}
return(fileToken.ChangeToken);
}
