public FeatureToggleRepository(
UnleashConfig unleashConfig,
IUnleashScheduledExecutor executor,
IToggleFetcher toggleFetcher,
IToggleBackupHandler toggleBackupHandler)
{
_toggleBackupHandler = toggleBackupHandler;
_toggleFetcher = toggleFetcher;
_toggleCollection = toggleBackupHandler.Read();
_executor = executor;
_executor.SetInterval(s => UpdateToggles(s).Wait(), 0, unleashConfig.FetchTogglesInterval);
}
public void Write(ToggleCollection toggleCollection)
{
try
{
using (var writer = new StreamWriter(_backupFile))
{
var json = JsonConvert.SerializeObject(toggleCollection);
writer.Write(JsonConvert.SerializeObject(toggleCollection));
}
}
catch (IOException e)
{
Logger.WarnException("Unleash was unable to backup feature toggles to file: {}", e, _backupFile);
}
}
private async Task <FeatureToggleResponse> GetToggleResponse(HttpResponseMessage response)
{
_etag = response.Headers.ETag?.Tag;
var content = await response.Content.ReadAsStringAsync();
var toggles = new ToggleCollection();
try
{
toggles = JsonToggleParser.FromJson(content);
}
catch (Exception ex)
{
Logger.WarnException("received toggles failed", ex);
}
return(FeatureToggleResponse.Changed(toggles));
}
public async Task UpdateToggles(object state)
{
try
{
var response = await _toggleFetcher.FetchToggles();
if (response.IsChanged)
{
_toggleCollection = response.ToggleCollection;
_toggleBackupHandler.Write(response.ToggleCollection);
}
}
catch (Exception e)
{
Logger.WarnException("Could not refresh feature toggles", e);
}
}
private FeatureToggleResponse(StatusType status, ToggleCollection toggleCollection)
{
Status = status;
ToggleCollection = toggleCollection;
}
public static FeatureToggleResponse Changed(ToggleCollection toggleCollection) => new FeatureToggleResponse(StatusType.CHANGED, toggleCollection);