private void HandleSendingFailure(State state, string batchId, IngestionException e)
{
var isRecoverable = e?.IsRecoverable ?? false;
AppCenterLog.Error(AppCenterLog.LogTag, $"Sending logs for channel '{Name}', batch '{batchId}' failed: {e?.Message}");
List <Log> removedLogs;
using (_mutex.GetLock(state))
{
removedLogs = _sendingBatches[batchId];
_sendingBatches.Remove(batchId);
if (isRecoverable)
{
_pendingLogCount += removedLogs.Count;
}
}
if (!isRecoverable && FailedToSendLog != null)
{
foreach (var log in removedLogs)
{
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, e));
}
}
Suspend(state, !isRecoverable, e);
}
private void HandleSendingFailure(State state, string batchId, Exception exception)
{
IList <Log> removedLogs;
using (_mutex.GetLock(state))
{
removedLogs = _sendingBatches[batchId];
_sendingBatches.Remove(batchId);
}
if (FailedToSendLog != null)
{
foreach (var log in removedLogs)
{
AppCenterLog.Debug(AppCenterLog.LogTag, $"Invoke FailedToSendLog event for channel '{Name}'");
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, exception));
}
}
try
{
_storage.DeleteLogs(Name, batchId);
}
catch (StorageException e)
{
AppCenterLog.Warn(AppCenterLog.LogTag, $"Could not delete logs for batch {batchId}", e);
}
}
public async Task EnqueueAsync(Log log)
{
try
{
State state;
bool discardLogs;
using (await _mutex.GetLockAsync().ConfigureAwait(false))
{
state = _mutex.State;
discardLogs = _discardLogs;
}
if (discardLogs)
{
AppCenterLog.Warn(AppCenterLog.LogTag, "Channel is disabled; logs are discarded");
SendingLog?.Invoke(this, new SendingLogEventArgs(log));
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, new CancellationException()));
}
EnqueuingLog?.Invoke(this, new EnqueuingLogEventArgs(log));
await PrepareLogAsync(log, state).ConfigureAwait(false);
await PersistLogAsync(log, state).ConfigureAwait(false);
}
catch (StatefulMutexException)
{
AppCenterLog.Warn(AppCenterLog.LogTag, "The Enqueue operation has been cancelled");
}
}
private void HandleSendingFailure(string batchId, IngestionException e)
{
var isRecoverable = e?.IsRecoverable ?? false;
MobileCenterLog.Error(MobileCenterLog.LogTag, $"Sending logs for channel '{Name}', batch '{batchId}' failed", e);
var removedLogs = _sendingBatches[batchId];
_sendingBatches.Remove(batchId);
if (!isRecoverable && FailedToSendLog != null)
{
foreach (var log in removedLogs)
{
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, e));
}
}
_mutex.Lock();
try
{
Suspend(!isRecoverable, e);
if (isRecoverable)
{
_pendingLogCount += removedLogs.Count;
}
}
finally
{
_mutex.Unlock();
}
}
private async Task SignalDeletingLogs(IList <string> sendingBatches)
{
var logs = new List <Log>();
try
{
do
{
var batchId = await _storage.GetLogsAsync(Name, ClearBatchSize, logs).ConfigureAwait(false);
if (sendingBatches.Contains(batchId))
{
continue;
}
foreach (var log in logs)
{
AppCenterLog.Debug(AppCenterLog.LogTag, $"Invoke SendingLog for channel '{Name}'");
SendingLog?.Invoke(this, new SendingLogEventArgs(log));
AppCenterLog.Debug(AppCenterLog.LogTag, $"Invoke FailedToSendLog event for channel '{Name}'");
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, new CancellationException()));
}
}while (logs.Count >= ClearBatchSize);
}
catch
{
AppCenterLog.Warn(AppCenterLog.LogTag, "Failed to invoke events for logs being deleted.");
}
}
public Task Enqueue(Log log)
{
_mutex.Lock();
var stateSnapshot = _stateKeeper.GetStateSnapshot();
try
{
if (_discardLogs)
{
MobileCenterLog.Warn(MobileCenterLog.LogTag, "Channel is disabled; logs are discarded");
_mutex.Unlock();
SendingLog?.Invoke(this, new SendingLogEventArgs(log));
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, new CancellationException()));
return(null);
}
_mutex.Unlock();
EnqueuingLog?.Invoke(this, new EnqueuingLogEventArgs(log));
_mutex.Lock(stateSnapshot);
return(Task.Run(async() =>
{
await PrepareLogAsync(log).ConfigureAwait(false);
await PersistLogAsync(log, stateSnapshot).ConfigureAwait(false);
}));
}
catch (StatefulMutexException e)
{
MobileCenterLog.Warn(MobileCenterLog.LogTag, "The Enqueue operation has been cancelled", e);
return(null);
}
finally
{
_mutex.Unlock();
}
}
/// <summary>
/// Suspend channel.
/// </summary>
/// <param name="state">Current state.</param>
/// <param name="deleteLogs">Value indicating whether logs should be enabled or disabled.</param>
/// <param name="exception">Possible error if unsuccessful.</param>
/// <param name="needDisableChannel">Value indicating whether channel should be disabled. True by default.</param>
private void Suspend(State state, bool deleteLogs, Exception exception, bool needDisableChannel = true)
{
AppCenterLog.Debug(AppCenterLog.LogTag, $"Suspend channel: '{Name}'");
try
{
IList <string> sendingBatches = null;
IList <Log> unsentLogs = null;
using (_mutex.GetLock(state))
{
if (needDisableChannel)
{
_enabled = false;
}
_batchScheduled = false;
_discardLogs = deleteLogs;
if (deleteLogs)
{
sendingBatches = _sendingBatches.Keys.ToList();
unsentLogs = _sendingBatches.Values.SelectMany(batch => batch).ToList();
_sendingBatches.Clear();
}
state = _mutex.InvalidateState();
}
if (unsentLogs != null && FailedToSendLog != null)
{
foreach (var log in unsentLogs)
{
AppCenterLog.Debug(AppCenterLog.LogTag, $"Invoke FailedToSendLog event for channel '{Name}'");
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, exception));
}
}
if (deleteLogs)
{
IList <IServiceCall> calls;
using (_mutex.GetLock(state))
{
calls = _calls.ToList();
_calls.Clear();
_pendingLogCount = 0;
TriggerDeleteLogsOnSuspending(sendingBatches);
}
foreach (var call in calls)
{
call.Cancel();
}
}
_storage.ClearPendingLogState(Name);
}
catch (StatefulMutexException)
{
AppCenterLog.Warn(AppCenterLog.LogTag, "The suspend operation has been canceled");
}
}
private void Suspend(State state, bool deleteLogs, Exception exception)
{
try
{
IEnumerable <Log> unsentLogs = null;
using (_mutex.GetLock(state))
{
_enabled = false;
_batchScheduled = false;
_discardLogs = deleteLogs;
if (deleteLogs)
{
unsentLogs = _sendingBatches.Values.SelectMany(batch => batch);
_sendingBatches.Clear();
}
state = _mutex.InvalidateState();
}
if (unsentLogs != null)
{
foreach (var log in unsentLogs)
{
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, exception));
}
}
if (deleteLogs)
{
try
{
_ingestion.Close();
}
catch (IngestionException e)
{
AppCenterLog.Error(AppCenterLog.LogTag, "Failed to close ingestion", e);
}
using (_mutex.GetLock(state))
{
_pendingLogCount = 0;
TriggerDeleteLogsOnSuspending();
}
}
_storage.ClearPendingLogState(Name);
}
catch (StatefulMutexException)
{
AppCenterLog.Warn(AppCenterLog.LogTag, "The Suspend operation has been cancelled");
}
}
/// <summary>
/// Enqueue a log asynchronously.
/// </summary>
/// <param name="log">log to enqueue.</param>
/// <returns>The async Task for this operation.</returns>
public async Task EnqueueAsync(Log log)
{
try
{
State state;
bool discardLogs;
using (await _mutex.GetLockAsync().ConfigureAwait(false))
{
state = _mutex.State;
discardLogs = _discardLogs;
}
if (discardLogs)
{
AppCenterLog.Warn(AppCenterLog.LogTag, "Channel is disabled; logs are discarded");
AppCenterLog.Debug(AppCenterLog.LogTag, $"Invoke SendingLog event for channel '{Name}'");
SendingLog?.Invoke(this, new SendingLogEventArgs(log));
AppCenterLog.Debug(AppCenterLog.LogTag, $"Invoke FailedToSendLog event for channel '{Name}'");
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, new CancellationException()));
return;
}
AppCenterLog.Debug(AppCenterLog.LogTag, $"Invoke EnqueuingLog event for channel '{Name}'");
EnqueuingLog?.Invoke(this, new EnqueuingLogEventArgs(log));
await PrepareLogAsync(log, state).ConfigureAwait(false);
AppCenterLog.Debug(AppCenterLog.LogTag, $"Invoke FilteringLog event for channel '{Name}'");
var filteringLogEventArgs = new FilteringLogEventArgs(log);
FilteringLog?.Invoke(this, filteringLogEventArgs);
if (filteringLogEventArgs.FilterRequested)
{
AppCenterLog.Warn(AppCenterLog.LogTag, $"Filtering out a log of type '{log.GetType()}' at the request of an event handler.");
}
else
{
await PersistLogAsync(log, state).ConfigureAwait(false);
}
}
catch (StatefulMutexException)
{
AppCenterLog.Warn(AppCenterLog.LogTag, "The Enqueue operation has been canceled");
}
}
private async Task SignalDeletingLogs(State stateSnapshot)
{
var logs = new List <Log>();
_mutex.Unlock();
await _storage.GetLogsAsync(Name, ClearBatchSize, logs).ConfigureAwait(false);
await _mutex.LockAsync(stateSnapshot).ConfigureAwait(false);
foreach (var log in logs)
{
_mutex.Unlock();
SendingLog?.Invoke(this, new SendingLogEventArgs(log));
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, new CancellationException()));
await _mutex.LockAsync(stateSnapshot).ConfigureAwait(false);
}
if (logs.Count >= ClearBatchSize)
{
await SignalDeletingLogs(stateSnapshot).ConfigureAwait(false);
}
}
private Task Suspend(bool deleteLogs, Exception exception)
{
_enabled = false;
_batchScheduled = false;
_discardLogs = deleteLogs;
_stateKeeper.InvalidateState();
var stateSnapshot = _stateKeeper.GetStateSnapshot();
try
{
if (deleteLogs && FailedToSendLog != null)
{
foreach (var log in _sendingBatches.Values.SelectMany(batch => batch))
{
_mutex.Unlock();
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, exception));
_mutex.Lock(stateSnapshot);
}
}
try
{
_ingestion.Close();
}
catch (IngestionException e)
{
MobileCenterLog.Error(MobileCenterLog.LogTag, "Failed to close ingestion", e);
}
if (deleteLogs)
{
_pendingLogCount = 0;
return(Task.Run(DeleteLogsOnSuspendedAsync));
}
return(_storage.ClearPendingLogStateAsync(Name));
}
catch (StatefulMutexException e)
{
MobileCenterLog.Warn(MobileCenterLog.LogTag, "The CountFromDisk operation has been cancelled", e);
return(null);
}
}
private Task SignalDeletingLogs()
{
var logs = new List <Log>();
return(_storage.GetLogsAsync(Name, ClearBatchSize, logs)
.ContinueWith(completedTask =>
{
if (completedTask.IsFaulted)
{
AppCenterLog.Warn(AppCenterLog.LogTag,
"Failed to invoke events for logs being deleted.");
return;
}
foreach (var log in logs)
{
SendingLog?.Invoke(this, new SendingLogEventArgs(log));
FailedToSendLog?.Invoke(this, new FailedToSendLogEventArgs(log, new CancellationException()));
}
if (logs.Count >= ClearBatchSize)
{
SignalDeletingLogs();
}
}));
}
private void AnyChannelFailedToSendLog(object sender, FailedToSendLogEventArgs e)
{
FailedToSendLog?.Invoke(sender, e);
}