private static Func <Task> SendCommand(int run)
{
return(async() =>
{
var r = new Random();
while (_run == run)
{
try
{
for (int i = 0; i < r.Next(1, 10); i++)
{
var payload = BitConverter.GetBytes(r.Next(0, 100000)).Concat(BitConverter.GetBytes(r.Next(0, 100000))).ToArray();
await _cluster.ApplyCommandAsync(new StateMachineCommandRequest()
{
Command = payload
});
}
TheTrace.TraceInformation("Sent commands");
}
catch (Exception e)
{
TheTrace.TraceError(e.ToString());
}
await Task.Delay(r.Next(0, 50));
}
});
}
public async Task <IEnumerable <DynamicTableEntity> > QueryAsync(ShardKeyArrived shardKeyArrived)
{
//var account = CloudStorageAccount.Parse(shardKeyArrived.Source.ConnectionString);
CloudStorageAccount account = null;
if (!String.IsNullOrWhiteSpace(shardKeyArrived.Source.AccountSasKey))
{
// Create new storage credentials using the SAS token.
var accountSas = new StorageCredentials(shardKeyArrived.Source.AccountSasKey);
// Use these credentials and the account name to create a Blob service client.
try
{
account = new CloudStorageAccount(accountSas, shardKeyArrived.Source.AccountName, endpointSuffix: "", useHttps: true);
}
catch (Exception ex)
{
TheTrace.TraceError(ex.ToString());
}
}
else
{
account = CloudStorageAccount.Parse(shardKeyArrived.Source.ConnectionString);
}
var client = account.CreateCloudTableClient();
var table = client.GetTableReference(shardKeyArrived.Source.DynamicProperties["TableName"].ToString());
return(await table.ExecuteQueryAsync(new TableQuery().Where(TableQuery.GenerateFilterCondition("PartitionKey", "eq", shardKeyArrived.ShardKey))).ConfigureAwait(false));
}
private async Task DoScheduleAsync(PeckSource source)
{
var oldTimestamp = source.Timestamp;
try
{
await _eventQueueOperator.PushAsync(new Event(new PeckSourceScheduled()
{
Source = source
})
{
QueueName = QueueName.FromTopicName("PeckSourceScheduled").ToString()
});
source.LastOffset = DateTimeOffset.UtcNow;
await _table.ExecuteAsync(TableOperation.InsertOrMerge(source));
}
catch (Exception e)
{
source.LastOffset = oldTimestamp;
TheTrace.TraceError("Error scheduling source {0} : {1}", source.Name, e);
try
{
_table.Execute(TableOperation.InsertOrMerge(source));
}
catch (Exception ex)
{
TheTrace.TraceError("Error saving error (!) in table. Source {0} : {1}", source.Name, ex);
}
}
}
private async Task KeepExtendingLeaseAsync(Func <Task> extendLeaseAsync, TimeSpan howLong, CancellationToken cancellationToken, string resource)
{
await EnsureExists();
var thisLong = new TimeSpan(2 * howLong.Ticks / 3); // RATM: how long? This long, what you reap is what you sew!
await Task.Delay(thisLong, cancellationToken);
while (true)
{
try
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
await extendLeaseAsync();
TheTrace.TraceInformation("Extended the lifetime of the lease for {0}...", resource);
await Task.Delay(thisLong, cancellationToken);
}
catch (Exception exception)
{
if (!cancellationToken.IsCancellationRequested) // it is OK if cancellation requested, it would have been cancellation
{
TheTrace.TraceError(exception.ToString());
}
break;
}
}
}
private async Task PushbatchAsync()
{
if (_stringBuilder.Length == 0)
{
return;
}
try
{
var responseMessage = await _httpClient.PostAsync(_esUrl + "_bulk",
new StringContent(_stringBuilder.ToString(),
Encoding.UTF8, "application/json"));
_stringBuilder.Clear();
_numberOfRecords = 0;
responseMessage.EnsureSuccessStatusCode();
TheTrace.TraceInformation("ConveyorBelt_Pusher: Pushing to {0}", _esUrl);
}
catch (Exception e)
{
TheTrace.TraceError(e.ToString());
throw;
}
}
public async Task KeepExtendingLeaseAsync(Event message, TimeSpan howLong, CancellationToken cancellationToken)
{
await Task.Delay(new TimeSpan(2 * howLong.Ticks / 3), cancellationToken);
while (true)
{
try
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
var underlyingMessage = (BrokeredMessage)message.UnderlyingMessage;
await underlyingMessage.RenewLockAsync();
await Task.Delay(new TimeSpan(2 * howLong.Ticks / 3), cancellationToken);
}
catch (Exception exception)
{
TheTrace.TraceError(exception.ToString());
break;
}
}
}
private async Task <bool> Process(CancellationToken cancellationToken)
{
var result = await _queueOperator.NextAsync(
new QueueName(_actorDescriptor.SourceQueueName));
var cancellationTokenSource = new CancellationTokenSource();
if (result.IsSuccessful)
{
TheTrace.TraceInformation("Receieved a message. Id: {0} Queue: {1} ", result.PollingResult.Id, _actorDescriptor.SourceQueueName);
var actor = (IProcessorActor)_serviceLocator.GetService(_actorDescriptor.ActorType);
try
{
// this is NOT supposed to be awaited upon!!
_queueOperator.KeepExtendingLeaseAsync(result.PollingResult, TimeSpan.FromSeconds(30),
cancellationTokenSource.Token).SafeObserve();
// Would have been great to make this fixed memory foot-print with real iterable vs. list
var events = (await actor.ProcessAsync(result.PollingResult)).ToArray(); // the enumerable has to be turned into a list anyway. it does further on
var groups = events.GroupBy(x => x.QueueName);
foreach (var gr in groups)
{
await _queueOperator.PushBatchAsync(gr);
TryDisposeMessages(gr);
}
cancellationTokenSource.Cancel();
await _queueOperator.CommitAsync(result.PollingResult);
TheTrace.TraceInformation("Processing succeeded. Id: {0} Queue: {1} ", result.PollingResult.Id, _actorDescriptor.SourceQueueName);
}
catch (Exception exception)
{
TheTrace.TraceInformation("Processing failed. Id: {0} Queue: {1} ", result.PollingResult.Id, _actorDescriptor.SourceQueueName);
TheTrace.TraceError(exception.ToString());
cancellationTokenSource.Cancel();
_queueOperator.AbandonAsync(result.PollingResult).SafeObserve().Wait();
}
finally
{
if (result.IsSuccessful)
{
TryDisposeMessage(result.PollingResult);
}
_serviceLocator.ReleaseService(actor);
}
}
return(result.IsSuccessful);
}
private async Task <bool> Process(CancellationToken cancellationToken)
{
var result = await _queueOperator.NextAsync(
new QueueName(_actorDescriptor.SourceQueueName));
var cancellationTokenSource = new CancellationTokenSource();
if (result.IsSuccessful)
{
TheTrace.TraceInformation("Receieved a message. Id: {0} Queue: {1} ", result.PollingResult.Id, _actorDescriptor.SourceQueueName);
var actor = (IProcessorActor)_serviceLocator.GetService(_actorDescriptor.ActorType);
try
{
_queueOperator.KeepExtendingLeaseAsync(result.PollingResult, TimeSpan.FromSeconds(30),
cancellationTokenSource.Token).SafeObserve();
var events = (await actor.ProcessAsync(result.PollingResult)).ToArray();
cancellationTokenSource.Cancel();
await _queueOperator.CommitAsync(result.PollingResult);
var groups = events.GroupBy(x => x.QueueName);
foreach (var gr in groups)
{
await _queueOperator.PushBatchAsync(gr);
TryDisposeMessages(gr);
}
TheTrace.TraceInformation("Processing succeeded. Id: {0} Queue: {1} ", result.PollingResult.Id, _actorDescriptor.SourceQueueName);
}
catch (Exception exception)
{
TheTrace.TraceInformation("Processing failed. Id: {0} Queue: {1} ", result.PollingResult.Id, _actorDescriptor.SourceQueueName);
TheTrace.TraceError(exception.ToString());
cancellationTokenSource.Cancel();
_queueOperator.AbandonAsync(result.PollingResult).SafeObserve().Wait();
}
finally
{
if (result.IsSuccessful)
{
TryDisposeMessage(result.PollingResult);
}
_serviceLocator.ReleaseService(actor);
}
}
return(result.IsSuccessful);
}
private async Task <bool> Process(CancellationToken cancellationToken)
{
var result = await _queueOperator.NextAsync(
new QueueName(_actorDescriptor.SourceQueueName));
var cancellationTokenSource = new CancellationTokenSource();
if (result.IsSuccessful)
{
TheTrace.TraceInformation("Received a message. Id: {0} Queue: {1} ", result.PollingResult.Id, _actorDescriptor.SourceQueueName);
var actor = (IProcessorActor)_serviceLocator.GetService(_actorDescriptor.ActorType);
try
{
// this is NOT supposed to be awaited upon!!
if (!_queueOperator.IsEventDriven)
{
_queueOperator.KeepExtendingLeaseAsync(result.PollingResult, TimeSpan.FromSeconds(30),
cancellationTokenSource.Token).SafeObserve();
}
await ProcessEvent(actor, result.PollingResult, _queueOperator);
if (!_queueOperator.IsEventDriven)
{
await _queueOperator.CommitAsync(result.PollingResult);
}
TheTrace.TraceInformation("Processing succeeded. Id: {0} Queue: {1} ", result.PollingResult.Id, _actorDescriptor.SourceQueueName);
}
catch (Exception exception)
{
TheTrace.TraceInformation("Processing failed. Id: {0} Queue: {1} ", result.PollingResult.Id, _actorDescriptor.SourceQueueName);
TheTrace.TraceError(exception.ToString());
cancellationTokenSource.Cancel();
_queueOperator.AbandonAsync(result.PollingResult).SafeObserve().Wait();
}
finally
{
if (result.IsSuccessful)
{
TryDisposeMessage(result.PollingResult);
}
_serviceLocator.ReleaseService(actor);
}
}
return(result.IsSuccessful);
}
private async Task <CloudTable> GetTable()
{
if (!await _table.ExistsAsync())
{
try
{
await _table.CreateAsync();
}
catch (Exception exception)
{
TheTrace.TraceError(exception.ToString());
}
}
return(_table);
}
private void TruncateLogUpToIndex(long index)
{
using (var tx = _env.BeginTransaction())
{
try
{
tx.DeleteUpToValue(_logDb, LogKey, index);
tx.Commit();
}
catch
{
TheTrace.TraceError($"TruncateLogUpToIndex failed for index {index} when last index was {this.LastIndex}");
tx.Abort();
throw;
}
}
}
public async Task ProcessEventsAsync(PartitionContext context, IEnumerable <EventData> messages)
{
try
{
var lazyEnumerable = messages.SelectMany(ev => _parser.Parse(ev.GetBodyStream, null, _source));
await _elasticsearchBatchPusher.PushAll(lazyEnumerable, _source);
if (_timer.Elapsed > _checkpointInterval)
{
_timer.Restart();
await context.CheckpointAsync();
}
}
catch (Exception e)
{
TheTrace.TraceError(e.ToString());
}
}
/// <summary>
/// Custom Source Properties:
/// 1- Parser
/// 2- EventHubName
/// 3- StorageConnectionString
/// </summary>
/// <param name="pusher"></param>
/// <param name="source"></param>
public EventHubConsumer(NestBatchPusher pusher, DiagnosticsSourceSummary source)
{
this._pusher = pusher;
this.Source = source;
_parser = FactoryHelper.Create <IParser>(source.DynamicProperties["Parser"].ToString());
_eventProcessorHost = new EventProcessorHost(
"ConveyorBelt",
source.DynamicProperties["EventHubName"].ToString(),
EventHubConsumerGroup.DefaultGroupName,
source.ConnectionString,
source.DynamicProperties["StorageConnectionString"].ToString());
var options = new EventProcessorOptions();
options.ExceptionReceived += (sender, e) => { TheTrace.TraceError(e.Exception.ToString()); };
_eventProcessorHost.RegisterEventProcessorFactoryAsync(this, options).Wait();
}
public static T WrapException <T>(this Func <T> func, T exceptionResult, Action <Exception> handler = null)
{
try
{
return(func());
}
catch (Exception exception)
{
if (handler == null)
{
TheTrace.TraceError(exception.ToString());
}
else
{
handler(exception);
}
return(exceptionResult);
}
}
private async Task <CloudTable> GetTable(string tableName)
{
var account = CloudStorageAccount.Parse(_connectionString);
var client = account.CreateCloudTableClient();
var table = client.GetTableReference(tableName);
if (!table.Exists())
{
try
{
await table.CreateAsync();
}
catch (Exception exception)
{
TheTrace.TraceError(exception.ToString());
}
}
return(table);
}
private void Sisyphus()
{
while (!_cancel.IsCancellationRequested)
{
try
{
var job = _q.Take(_cancel.Token);
// yes, running async in sync because cannot leave these to threadpool to do. Too important to do that, cannot afford to face thread exhaustion
job.DoAsync(_cancel.Token).ConfigureAwait(false).GetAwaiter().GetResult();
TheTrace.TraceInformation($"Job in the worker {this.Name} finished. Current QueueLength is {QueueDepth}.");
}
catch (OperationCanceledException ce)
{
// OK
}
catch (Exception e)
{
TheTrace.TraceError($"Job errorred: {e}");
}
}
}
public async Task ScheduleSourcesAsync()
{
if (!await ShouldScheduleAsync())
{
return;
}
var seconds =
Convert.ToInt32(_configurationValueProvider.GetValue(ConfigurationKeys.ClusterLockDurationSeconds));
var sources = _sourceConfiguration.GetSources();
foreach (var source in sources)
{
try
{
var lockToken = new LockToken(source.ToTypeKey());
if (!(await _lockStore.TryLockAsync(lockToken, tries: 0, aquireTimeoutMilliseconds: 100, timeoutMilliseconds: seconds * 1000))) // if tries < 1 it puts to 1 in beehive
{
TheTrace.TraceInformation("I could NOT be master for {0}", source.ToTypeKey());
continue;
}
var resultSource = await TryScheduleSourceAsync(source);
if (resultSource != null)
{
_sourceConfiguration.UpdateSource(resultSource);
TheTrace.TraceInformation("MasterScheduler - Updated {0}", resultSource.ToTypeKey());
}
await _lockStore.ReleaseLockAsync(lockToken);
}
catch (Exception e)
{
TheTrace.TraceError(e.ToString());
}
}
}
public T GetProperty <T>(string name)
{
if (_entity.Properties.ContainsKey(name))
{
try
{
if (typeof(T) == typeof(DateTimeOffset))
{
return((T)(object)new DateTimeOffset((DateTime)_entity.Properties[name].PropertyAsObject));
}
return((T)_entity.Properties[name].PropertyAsObject);
}
catch (Exception)
{
TheTrace.TraceError("Failed to convert {0} to {1}", name, typeof(T).Name);
throw;
}
}
else
{
return(default(T));
}
}
static Task ExceptionReceivedHandler(ExceptionReceivedEventArgs args)
{
TheTrace.TraceError("Boy this should have never happened since we have exception handling in Factory Actor: {}", args.Exception);
return(Task.FromResult(false));
}
private async Task PushbatchAsync()
{
if (_batch.Count == 0)
{
return;
}
try
{
int retry = 0;
List <int> statuses = null;
do
{
var responseMessage = await _httpClient.PostAsync(_esUrl + "_bulk",
new StringContent(_batch.ToString(),
Encoding.UTF8, "application/json"));
var content = responseMessage.Content == null ? "" :
(await responseMessage.Content.ReadAsStringAsync());
if (!responseMessage.IsSuccessStatusCode)
{
throw new ApplicationException(string.Format("Unsuccessful ES bulk: {0} - {1}", responseMessage.StatusCode, content));
}
dynamic j = JObject.Parse(content);
if (j == null || j.items == null)
{
throw new ApplicationException(string.Format("Unsuccessful ES bulk - items null: {0}", content));
}
var items = (JArray)j.items;
statuses = items.Children <JObject>().Select(x => x.Properties().First().Value["status"].Value <int>()).ToList();
if (statuses.Any(y => y < 200 || (y > 299 && y != 429)))
{
TheTrace.TraceWarning("LOOK!! We had some errors from ES bulk at retry {1}: {0}", content, retry);
}
if (statuses.Any(y => y == 429))
{
var timeSpan = _interval.Next();
TheTrace.TraceWarning("LOOK!! Got 429 -> backing off for {0} seconds", timeSpan.TotalSeconds);
Thread.Sleep(timeSpan);
}
else
{
_interval.Reset();
}
TheTrace.TraceInformation("ConveyorBelt_Pusher: Pushing {1} records to {0} [retry: {2}]", _esUrl, _batch.Count, retry);
} while (_batch.Prune(statuses) > 0 && retry++ < 3);
if (_batch.Count > 0)
{
TheTrace.TraceWarning("WARNING!!! Some residual documents could not be inserted even after retries: {0}", _batch.Count);
_batch.Clear();
}
}
catch (Exception e)
{
TheTrace.TraceError(e.ToString());
throw;
}
}
public async Task ScheduleSourcesAsync()
{
var sources = _sourceConfiguration.GetSources();
foreach (var source in sources)
{
try
{
TheTrace.TraceInformation("MasterScheduler - Scheduling {0}", source.ToTypeKey());
if (!source.IsActive.HasValue || !source.IsActive.Value)
{
TheTrace.TraceInformation("MasterScheduler - NOT active: {0}", source.ToTypeKey());
continue;
}
await SetupMappingsAsync(source);
TheTrace.TraceInformation("MasterScheduler - Finished Mapping setup: {0}", source.ToTypeKey());
if (!source.LastScheduled.HasValue)
{
source.LastScheduled = DateTimeOffset.UtcNow.AddYears(-1);
}
// if has been recently scheduled
if (source.LastScheduled.Value.AddMinutes(source.SchedulingFrequencyMinutes.Value) >
DateTimeOffset.UtcNow)
{
TheTrace.TraceInformation("MasterScheduler - Nothing to do with {0}. LastScheduled in Future {1}",
source.ToTypeKey(), source.LastScheduled.Value);
continue;
}
var schedulerType = Assembly.GetExecutingAssembly().GetType(source.SchedulerType) ??
Type.GetType(source.SchedulerType);
if (schedulerType == null)
{
source.ErrorMessage = "Could not find SchedulerType: " + source.SchedulerType;
}
var scheduler = (ISourceScheduler)_locator.GetService(schedulerType);
var result = await scheduler.TryScheduleAsync(source);
TheTrace.TraceInformation(
"MasterScheduler - Got result for TryScheduleAsync in {0}. Success => {1}",
source.ToTypeKey(), result.Item1);
if (result.Item2)
{
await _eventQueueOperator.PushBatchAsync(result.Item1);
}
source.ErrorMessage = string.Empty;
TheTrace.TraceInformation("MasterScheduler - Finished Scheduling {0}", source.ToTypeKey());
source.LastScheduled = DateTimeOffset.UtcNow;
}
catch (Exception e)
{
TheTrace.TraceError(e.ToString());
source.ErrorMessage = e.ToString();
}
_sourceConfiguration.UpdateSource(source);
TheTrace.TraceInformation("MasterScheduler - Updated {0}", source.ToTypeKey());
}
}
private async Task <DiagnosticsSource> TryScheduleSourceAsync(DiagnosticsSource source)
{
try
{
source = _sourceConfiguration.RefreshSource(source);
TheTrace.TraceInformation("MasterScheduler - Scheduling {0}", source.ToTypeKey());
if (!source.IsActive.HasValue || !source.IsActive.Value)
{
TheTrace.TraceInformation("MasterScheduler - NOT active: {0}", source.ToTypeKey());
return(null);
}
var createMappings = _configurationValueProvider.GetValue(ConfigurationKeys.EsCreateMappings);
if (Convert.ToBoolean(createMappings))
{
await SetupMappingsAsync(source);
}
if (!source.LastScheduled.HasValue)
{
source.LastScheduled = DateTimeOffset.UtcNow.AddDays(-1);
}
// if has been recently scheduled
if (source.LastScheduled.Value.AddMinutes(source.SchedulingFrequencyMinutes.Value) >
DateTimeOffset.UtcNow)
{
TheTrace.TraceInformation("MasterScheduler - Nothing to do with {0}. LastScheduled in Future {1}",
source.ToTypeKey(), source.LastScheduled.Value);
return(null);
}
_telemetryProvider.WriteTelemetry(
"MasterScheduler duration since last scheduled",
(long)(DateTime.UtcNow - source.LastScheduled).Value.TotalMilliseconds,
source.ToTypeKey());
var schedulerType = Assembly.GetExecutingAssembly().GetType(source.SchedulerType) ??
Type.GetType(source.SchedulerType);
if (schedulerType == null)
{
source.ErrorMessage = "Could not find SchedulerType: " + source.SchedulerType;
}
else
{
await _scheduleDurationInstrumentor.InstrumentAsync(async() =>
{
var scheduler = (ISourceScheduler)_locator.GetService(schedulerType);
var result = await scheduler.TryScheduleAsync(source);
source.LastScheduled = DateTimeOffset.UtcNow;
TheTrace.TraceInformation(
"MasterScheduler - Got result for TryScheduleAsync in {0}. Success => {1}",
source.ToTypeKey(), result.Item1);
if (result.Item2)
{
await _eventQueueOperator.PushBatchAsync(result.Item1);
}
source.ErrorMessage = string.Empty;
TheTrace.TraceInformation("MasterScheduler - Finished Scheduling {0}", source.ToTypeKey());
}, source.ToTypeKey());
}
return(source);
}
catch (Exception e)
{
TheTrace.TraceError(e.ToString());
source.ErrorMessage = e.ToString();
return(source);
}
}
public void TraceErrorDoesNotThrowExceptionWithMissingParams()
{
TheTrace.TraceError("chappi {1} {0}", "hapachap");
}
public void TraceErrorDoesNotThrowExceptionWithNoParams()
{
TheTrace.TraceError("chappi {1} {0}");
}
public void TraceErrorDoesNotThrowException()
{
TheTrace.TraceError("chappi {1} {0}", "hapachap", 7979);
}
