protected override Task OnInitializingPartitionAsync(EventProcessorHostPartition partition, CancellationToken cancellationToken)
{
partition.ProcessorHost = this;
partition.EventProcessor = _processorFactory.CreateEventProcessor();
partition.ReadLastEnqueuedEventPropertiesFunc = ReadLastEnqueuedEventProperties;
// Since we are re-initializing this partition, any cached information we have about the partition will be incorrect.
// Clear it out now, if there is any, we'll refresh it in ListCheckpointsAsync, which EventProcessor will call before starting to pump messages.
partition.Checkpoint = null;
return(partition.EventProcessor.OpenAsync(partition));
}
protected override async Task OnInitializingPartitionAsync(EventProcessorHostPartition partition, CancellationToken cancellationToken)
{
partition.ProcessorHost = this;
partition.EventProcessor = _processorFactory.CreateEventProcessor();
// Since we are re-initializing this partition, any cached information we have about the partition will be incorrect.
// Clear it out now, if there is any, we'll refresh it in ListCheckpointsAsync, which EventProcessor will call before starting to pump messages.
partition.Checkpoint = null;
await partition.EventProcessor.OpenAsync(partition).ConfigureAwait(false);
// No ReadLastEnqueuedEventProperties information is available at this moment set the ReadLastEnqueuedEventPropertiesFunc last
// to avoid an exception in OpenAsync
partition.ReadLastEnqueuedEventPropertiesFunc = ReadLastEnqueuedEventProperties;
}
public LdClient(Configuration config, IEventProcessor eventProcessor)
{
Log.InfoFormat("Starting LaunchDarkly Client {0}",
ServerSideClientEnvironment.Instance.Version);
_configuration = config;
ServerDiagnosticStore diagnosticStore = null;
if (!_configuration.DiagnosticOptOut)
{
diagnosticStore = new ServerDiagnosticStore(_configuration);
}
if (eventProcessor == null)
{
IEventProcessorFactory eventProcessorFactory = _configuration.EventProcessorFactory ?? Components.DefaultEventProcessor;
if (eventProcessorFactory is IEventProcessorFactoryWithDiagnostics epfwd)
{
_eventProcessor = epfwd.CreateEventProcessor(_configuration, diagnosticStore);
}
else
{
_eventProcessor = eventProcessorFactory.CreateEventProcessor(_configuration);
}
_shouldDisposeEventProcessor = true;
}
else
{
_eventProcessor = eventProcessor;
// The following line is for backward compatibility with the obsolete mechanism by which the
// caller could pass in an IStoreEvents implementation instance that we did not create. We
// were not disposing of that instance when the client was closed, so we should continue not
// doing so until the next major version eliminates that mechanism. We will always dispose
// of instances that we created ourselves from a factory.
_shouldDisposeEventProcessor = false;
}
IFeatureStore store;
if (_configuration.FeatureStore == null)
{
store = (_configuration.FeatureStoreFactory ??
Components.InMemoryFeatureStore).CreateFeatureStore();
_shouldDisposeFeatureStore = true;
}
else
{
store = _configuration.FeatureStore;
_shouldDisposeFeatureStore = false; // see previous comment
}
_featureStore = new FeatureStoreClientWrapper(store);
IUpdateProcessorFactory updateProcessorFactory = _configuration.UpdateProcessorFactory ?? Components.DefaultUpdateProcessor;
if (updateProcessorFactory is IUpdateProcessorFactoryWithDiagnostics upfwd)
{
_updateProcessor = upfwd.CreateUpdateProcessor(_configuration, _featureStore, diagnosticStore);
}
else
{
_updateProcessor = updateProcessorFactory.CreateUpdateProcessor(_configuration, _featureStore);
}
var initTask = _updateProcessor.Start();
if (!(_updateProcessor is NullUpdateProcessor))
{
Log.InfoFormat("Waiting up to {0} milliseconds for LaunchDarkly client to start..",
_configuration.StartWaitTime.TotalMilliseconds);
}
try
{
var unused = initTask.Wait(_configuration.StartWaitTime);
}
catch (AggregateException)
{
// StreamProcessor may throw an exception if initialization fails, because we want that behavior
// in the Xamarin client. However, for backward compatibility we do not want to throw exceptions
// from the LdClient constructor in the .NET client, so we'll just swallow this.
}
}