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);
}
}
bool ConfirmationHandler()
{
XamarinDevice.BeginInvokeOnMainThread(() =>
{
Current.MainPage.DisplayActionSheet("Crash detected. Send anonymous crash report?", null, null, "Send", "Always Send", "Don't Send").ContinueWith((arg) =>
{
var answer = arg.Result;
UserConfirmation userConfirmationSelection;
if (answer == "Send")
{
userConfirmationSelection = UserConfirmation.Send;
}
else if (answer == "Always Send")
{
userConfirmationSelection = UserConfirmation.AlwaysSend;
}
else
{
userConfirmationSelection = UserConfirmation.DontSend;
}
AppCenterLog.Debug(LogTag, "User selected confirmation option: \"" + answer + "\"");
Crashes.NotifyUserConfirmation(userConfirmationSelection);
});
});
return(true);
}
private void SaveExceptionFile(Directory directory, string fileName, Exception exception)
{
try
{
using (var fileStream = NewFileStream(Path.Combine(directory.FullName, fileName), FileMode.Create))
{
var formatter = new BinaryFormatter();
formatter.Serialize(fileStream, exception);
}
AppCenterLog.Debug(Crashes.LogTag, $"Saved exception in directory {ErrorStorageDirectoryName} with name {fileName}.");
}
catch (Exception e)
{
if (!exception.GetType().IsSerializable)
{
// Note that this still saves an empty file which acts as a marker for error report life cycle. Same as Android SDK.
AppCenterLog.Warn(Crashes.LogTag, $"Cannot serialize {exception.GetType().FullName} exception for client side inspection. " +
"If you want to have access to the exception in the callbacks, please add a Serializable attribute " +
"and a deserialization constructor to the exception class.");
}
else
{
AppCenterLog.Warn(Crashes.LogTag, "Failed to serialize exception for client side inspection.", e);
}
}
}
// Determines whether the application has started already and is not suspended,
// but ApplicationLifecycleHelper has not yet fired an initial "resume" event.
private static async Task <bool> HasStartedAndNeedsResume()
{
var needsResume = false;
try
{
// Don't use CurrentSynchronizationContext as that seems to cause an error in Unity applications.
var asyncAction = CoreApplication.MainView?.CoreWindow?.Dispatcher.RunAsync(
CoreDispatcherPriority.Normal, () =>
{
// If started already, a resume has already occurred.
if (_started)
{
return;
}
if (CoreApplication.Views.Any(view => view.CoreWindow != null &&
view.CoreWindow.Visible))
{
needsResume = true;
}
});
if (asyncAction != null)
{
await asyncAction;
}
}
catch (Exception e) when(e is COMException || e is InvalidOperationException)
{
// If MainView can't be accessed, a COMException or InvalidOperationException is thrown. It means that the
// MainView hasn't been created, and thus the UI hasn't appeared yet.
AppCenterLog.Debug(AppCenterLog.LogTag,
"Not invoking resume immediately because UI is not ready.");
}
return(needsResume);
}
private void HandleSendingFailure(State state, string batchId, IngestionException e)
{
AppCenterLog.Error(AppCenterLog.LogTag, $"Sending logs for channel '{Name}', batch '{batchId}' failed: {e?.Message}");
try
{
var isRecoverable = e?.IsRecoverable ?? false;
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);
}
catch (StatefulMutexException)
{
AppCenterLog.Debug(AppCenterLog.LogTag, "Handle sending failure operation has been canceled. Callbacks were invoked when channel suspended.");
}
}
private void CheckPendingLogs(State state)
{
if (!_enabled)
{
AppCenterLog.Info(AppCenterLog.LogTag, "The service has been disabled. Stop processing logs.");
return;
}
AppCenterLog.Debug(AppCenterLog.LogTag, $"CheckPendingLogs({Name}) pending log count: {_pendingLogCount}");
using (_mutex.GetLock())
{
if (_pendingLogCount >= _maxLogsPerBatch)
{
_batchScheduled = true;
Task.Run(async() =>
{
await TriggerIngestionAsync(state).ConfigureAwait(false);
});
}
else if (_pendingLogCount > 0 && !_batchScheduled)
{
_batchScheduled = true;
// No need wait _batchTimeInterval here.
Task.Run(async() =>
{
await Task.Delay((int)_batchTimeInterval.TotalMilliseconds).ConfigureAwait(false);
if (_batchScheduled)
{
await TriggerIngestionAsync(_mutex.State).ConfigureAwait(false);
}
});
}
}
}
/// <summary>
/// Asynchronously deletes all logs for a particular channel
/// </summary>
/// <param name="channelName">Name of the channel to delete logs for</param>
/// <exception cref="StorageException"/>
public Task DeleteLogs(string channelName)
{
var task = new Task(() =>
{
try
{
AppCenterLog.Debug(AppCenterLog.LogTag,
$"Deleting all logs from storage for channel '{channelName}'");
ClearPendingLogStateWithoutEnqueue(channelName);
_storageAdapter.DeleteAsync <LogEntry>(entry => entry.Channel == channelName)
.Wait();
}
catch (KeyNotFoundException e)
{
throw new StorageException(e);
}
});
try
{
_queue.Add(task);
}
catch (InvalidOperationException)
{
throw new StorageException("The operation has been cancelled");
}
_flushSemaphore.Release();
return(task);
}
/// <summary>
/// Asynchronously deletes all logs in a particular batch
/// </summary>
/// <param name="channelName">The name of the channel associated with the batch</param>
/// <param name="batchId">The batch identifier</param>
/// <exception cref="StorageException"/>
public Task DeleteLogs(string channelName, string batchId)
{
return(AddTaskToQueue(() =>
{
try
{
AppCenterLog.Debug(AppCenterLog.LogTag,
$"Deleting logs from storage for channel '{channelName}' with batch id '{batchId}'");
var identifiers = _pendingDbIdentifierGroups[GetFullIdentifier(channelName, batchId)];
_pendingDbIdentifierGroups.Remove(GetFullIdentifier(channelName, batchId));
var deletedIdsMessage = "The IDs for deleting log(s) is/ are:";
foreach (var id in identifiers)
{
deletedIdsMessage += "\n\t" + id;
_pendingDbIdentifiers.Remove(id);
}
AppCenterLog.Debug(AppCenterLog.LogTag, deletedIdsMessage);
foreach (var id in identifiers)
{
_storageAdapter
.DeleteAsync <LogEntry>(entry => entry.Channel == channelName && entry.Id == id)
.GetAwaiter().GetResult();
}
}
catch (KeyNotFoundException e)
{
throw new StorageException(e);
}
}));
}
public async Task ShutdownAsync()
{
ThrowIfDisposed();
var tasks = new List <Task>();
lock (_channelGroupLock)
{
if (_isShutdown)
{
AppCenterLog.Warn(AppCenterLog.LogTag, "Attempted to shutdown channel multiple times.");
return;
}
_isShutdown = true;
_ingestion.Close();
foreach (var channel in _channels)
{
tasks.Add(channel.ShutdownAsync());
}
}
await Task.WhenAll(tasks).ConfigureAwait(false);
AppCenterLog.Debug(AppCenterLog.LogTag, "Waiting for storage to finish operations.");
if (!await _storage.ShutdownAsync(WaitStorageTimeout).ConfigureAwait(false))
{
AppCenterLog.Warn(AppCenterLog.LogTag, "Storage taking too long to finish operations; shutting down channel without waiting any longer.");
}
}
/// <summary>
/// Asynchronously deletes all logs in a particular batch
/// </summary>
/// <param name="channelName">The name of the channel associated with the batch</param>
/// <param name="batchId">The batch identifier</param>
/// <exception cref="StorageException"/>
public Task DeleteLogs(string channelName, string batchId)
{
return(AddTaskToQueue(() =>
{
try
{
AppCenterLog.Debug(AppCenterLog.LogTag,
$"Deleting logs from storage for channel '{channelName}' with batch id '{batchId}'");
var identifiers = _pendingDbIdentifierGroups[GetFullIdentifier(channelName, batchId)];
_pendingDbIdentifierGroups.Remove(GetFullIdentifier(channelName, batchId));
var deletedIdsMessage = "The IDs for deleting log(s) is/are:";
foreach (var identifier in identifiers)
{
deletedIdsMessage += "\n\t" + identifier;
_pendingDbIdentifiers.Remove(identifier);
}
AppCenterLog.Debug(AppCenterLog.LogTag, deletedIdsMessage);
_storageAdapter.Delete(TableName, ColumnIdName, identifiers.Cast <object>().ToArray());
}
catch (KeyNotFoundException e)
{
throw new StorageException(e);
}
}));
}
internal ErrorReport(AndroidErrorReport androidReport)
{
Id = androidReport.Id;
AppStartTime = DateTimeOffset.FromUnixTimeMilliseconds(androidReport.AppStartTime.Time);
AppErrorTime = DateTimeOffset.FromUnixTimeMilliseconds(androidReport.AppErrorTime.Time);
Device = androidReport.Device == null ? null : new Device(androidReport.Device);
object androidThrowable;
try
{
androidThrowable = androidReport.Throwable;
}
catch (Exception e)
{
AppCenterLog.Debug(Crashes.LogTag, "Cannot read throwable from java point of view, probably a .NET exception", e);
androidThrowable = null;
}
AndroidDetails = new AndroidErrorDetails(androidThrowable, androidReport.ThreadName);
iOSDetails = null;
byte[] exceptionBytes = AndroidExceptionDataManager.LoadWrapperExceptionData(Java.Util.UUID.FromString(Id));
if (exceptionBytes != null)
{
StackTrace = CrashesUtils.DeserializeException(exceptionBytes);
}
}
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.");
}
}
private void OnPushNotificationReceivedHandler(PushNotificationChannel sender, WindowsPushNotificationReceivedEventArgs e)
{
XmlDocument content = null;
if (e.NotificationType == PushNotificationType.Toast && (content = e.ToastNotification?.Content) != null)
{
AppCenterLog.Debug(LogTag, $"Received push notification payload: {content.GetXml()}");
if (ApplicationLifecycleHelper.Instance.IsSuspended)
{
AppCenterLog.Debug(LogTag, "Application in background. Push callback will be called when user clicks the toast notification.");
}
else
{
var pushNotification = ParseAppCenterPush(content);
if (pushNotification != null)
{
e.Cancel = true;
PushNotificationReceived?.Invoke(sender, pushNotification);
AppCenterLog.Debug(LogTag, "Application in foreground. Intercept push notification and invoke push callback.");
}
else
{
AppCenterLog.Debug(LogTag, "Push ignored. It was not sent through App Center.");
}
}
}
else
{
AppCenterLog.Debug(LogTag, $"Push ignored. We only handle Toast notifications but PushNotificationType is '{e.NotificationType}'.");
}
}
/// <summary>
/// Saves an error log on disk.
/// </summary>
/// <param name="exception">The exception that caused the crash.</param>
/// <param name="errorLog">The error log.</param>
public virtual void InstanceSaveErrorLogFiles(System.Exception exception, ManagedErrorLog errorLog)
{
try
{
// Serialize main log file.
var errorLogString = LogSerializer.Serialize(errorLog);
var errorLogFileName = errorLog.Id + ErrorLogFileExtension;
AppCenterLog.Debug(Crashes.LogTag, "Saving uncaught exception.");
var directory = InstanceGetErrorStorageDirectory();
directory.CreateFile(errorLogFileName, errorLogString);
AppCenterLog.Debug(Crashes.LogTag, $"Saved error log in directory {ErrorStorageDirectoryName} with name {errorLogFileName}.");
try
{
// Serialize exception as raw stack trace.
var exceptionFileName = errorLog.Id + ExceptionFileExtension;
directory.CreateFile(exceptionFileName, exception.ToString());
AppCenterLog.Debug(Crashes.LogTag, $"Saved exception in directory {ErrorStorageDirectoryName} with name {exceptionFileName}.");
}
catch (System.Exception ex)
{
AppCenterLog.Warn(Crashes.LogTag, "Failed to serialize exception for client side inspection.", ex);
}
}
catch (System.Exception ex)
{
AppCenterLog.Error(Crashes.LogTag, "Failed to save error log.", ex);
}
}
private async Task TriggerIngestionAsync(State state)
{
using (await _mutex.GetLockAsync(state).ConfigureAwait(false))
{
if (!_enabled || !_batchScheduled)
{
return;
}
AppCenterLog.Debug(AppCenterLog.LogTag,
$"TriggerIngestion({Name}) pending log count: {_pendingLogCount}");
_batchScheduled = false;
if (_sendingBatches.Count >= _maxParallelBatches)
{
AppCenterLog.Debug(AppCenterLog.LogTag,
$"Already sending {_maxParallelBatches} batches of analytics data to the server");
return;
}
}
// Get a batch from storage
var logs = new List <Log>();
var batchId = await _storage.GetLogsAsync(Name, _maxLogsPerBatch, logs).ConfigureAwait(false);
if (batchId != null)
{
using (await _mutex.GetLockAsync(state).ConfigureAwait(false))
{
_sendingBatches.Add(batchId, logs);
_pendingLogCount -= logs.Count;
}
try
{
// Before sending logs, trigger the sending event for this channel
if (SendingLog != null)
{
foreach (var log in logs)
{
AppCenterLog.Debug(AppCenterLog.LogTag, $"Invoke SendingLog event for channel '{Name}'");
SendingLog?.Invoke(this, new SendingLogEventArgs(log));
}
}
// If the optional Install ID has no value, default to using empty GUID
var installId = await AppCenter.GetInstallIdAsync().ConfigureAwait(false) ?? Guid.Empty;
var ingestionCall = _ingestion.Call(_appSecret, installId, logs);
using (await _mutex.GetLockAsync(state).ConfigureAwait(false))
{
_calls.Add(ingestionCall);
}
ingestionCall.ContinueWith(call => HandleSendingResult(state, batchId, call));
CheckPendingLogs(state);
}
catch (StorageException)
{
AppCenterLog.Warn(AppCenterLog.LogTag, "Something went wrong sending logs to ingestion");
}
}
}
/// <summary>
/// Asynchronously clears the stored state of logs that have been retrieved
/// </summary>
/// <param name="channelName"></param>
public Task ClearPendingLogState(string channelName)
{
return(AddTaskToQueue(() =>
{
ClearPendingLogStateWithoutEnqueue(channelName);
AppCenterLog.Debug(AppCenterLog.LogTag, $"Clear pending log states for channel {channelName}");
}));
}
/// <summary>
/// Creates an instance of Storage given a connection object.
/// </summary>
internal Storage(IStorageAdapter adapter, string databasePath)
{
AppCenterLog.Debug(AppCenterLog.LogTag, $"Creating database at: {databasePath}");
_storageAdapter = adapter;
_databasePath = databasePath;
_queue.Add(new Task(InitializeDatabase));
_queueFlushTask = Task.Run(FlushQueueAsync);
}
public Task DeleteLogs(string channelName)
{
lock (this)
{
AppCenterLog.Debug(AppCenterLog.LogTag, $"Storage.DeleteLogs for channelName={channelName}");
_storage.Remove(channelName);
return(TaskExtension.GetCompletedTask());
}
}
public Task PutLog(string channelName, Log log)
{
lock (this)
{
AppCenterLog.Debug(AppCenterLog.LogTag, $"Storage.PutLog for channelName={channelName}: {log}");
this[channelName].Add(log);
return(TaskExtension.GetCompletedTask());
}
}
internal static void EnableTls12()
{
// ReSharper disable once InvertIf
if ((ServicePointManager.SecurityProtocol & SecurityProtocolType.Tls12) != SecurityProtocolType.Tls12)
{
ServicePointManager.SecurityProtocol |= SecurityProtocolType.Tls12;
AppCenterLog.Debug(AppCenterLog.LogTag, "Enabled TLS 1.2 explicitly as it was disabled.");
}
}
public Task DeleteLogs(string channelName, string batchId)
{
lock (this)
{
AppCenterLog.Debug(AppCenterLog.LogTag, $"Storage.DeleteLogs for channelName={channelName} and batchId={batchId}");
var batch = _pending[batchId];
this[channelName].RemoveAll(log => batch.Contains(log));
return(TaskExtension.GetCompletedTask());
}
}
/// <summary>
/// If enabled, register push channel and send URI to backend.
/// Also start intercepting pushes.
/// If disabled and previously enabled, stop listening for pushes (they will still be received though).
/// </summary>
private void ApplyEnabledState(bool enabled)
{
if (enabled)
{
// We expect caller of this method to lock on _mutex, we can't do it here as that lock is not recursive
AppCenterLog.Debug(LogTag, "Getting push token...");
var state = _mutex.State;
CreatePushNotificationChannel(channel =>
{
try
{
using (_mutex.GetLock(state))
{
LatestPushToken = channel?.Uri;
if (!string.IsNullOrEmpty(LatestPushToken))
{
// Save channel member
_channel = channel;
// Subscribe to UserId Change.
UserIdContext.UserIdUpdated -= OnUserIdUpdated;
UserIdContext.UserIdUpdated += OnUserIdUpdated;
// Subscribe to push.
channel.PushNotificationReceived += OnPushNotificationReceivedHandler;
// Send channel URI to backend
AppCenterLog.Debug(LogTag, $"Push token '{LatestPushToken}'");
var pushInstallationLog = new PushInstallationLog(null, LatestPushToken, null, Guid.NewGuid(), UserIdContext.Instance.UserId);
// Do not await the call to EnqueueAsync or the UI thread can be blocked!
#pragma warning disable CS4014
Channel.EnqueueAsync(pushInstallationLog);
#pragma warning restore
}
else
{
AppCenterLog.Error(LogTag, "Push service registering with App Center backend has failed.");
}
}
}
catch (StatefulMutexException)
{
AppCenterLog.Warn(LogTag, "Push Enabled state changed after creating channel.");
}
});
}
else if (_channel != null)
{
LatestPushToken = null;
UserIdContext.UserIdUpdated -= OnUserIdUpdated;
_channel.PushNotificationReceived -= OnPushNotificationReceivedHandler;
}
}
private void CreatePushNotificationChannel(Action <PushNotificationChannel> created)
{
Task <PushNotificationChannel> CreatePushNotificationChannelForApplicationAsync()
{
try
{
return(new WindowsPushNotificationChannelManager()
.CreatePushNotificationChannelForApplicationAsync()
.AsTask());
}
catch (Exception e)
{
return(Task.FromException <PushNotificationChannel>(e));
}
}
void OnNetworkStateChange(object sender, EventArgs e)
{
if (NetworkStateAdapter.IsConnected)
{
NetworkStateAdapter.NetworkStatusChanged -= OnNetworkStateChange;
AppCenterLog.Debug(LogTag, "Second attempt to create notification channel...");
// Second attempt is the last one anyway.
CreatePushNotificationChannelForApplicationAsync().ContinueWith(task =>
{
if (task.IsFaulted)
{
AppCenterLog.Error(LogTag, "Unable to create notification channel.", task.Exception);
return;
}
created?.Invoke(task.Result);
});
}
}
// If this isn't the first time after installation, the notification channel is created successfully even without network.
CreatePushNotificationChannelForApplicationAsync().ContinueWith(task =>
{
if (task.IsFaulted && NetworkStateAdapter.IsConnected)
{
AppCenterLog.Error(LogTag, "Unable to create notification channel.", task.Exception);
return;
}
if (!task.IsFaulted && task.Result != null)
{
created?.Invoke(task.Result);
return;
}
AppCenterLog.Debug(LogTag, "The network isn't connected, another attempt to crate push notification channel " +
"will be made after the network is available.");
NetworkStateAdapter.NetworkStatusChanged += OnNetworkStateChange;
});
}
/// <exception cref="AppCenterException">Attempted to add duplicate channel to group</exception>
public IChannelUnit AddChannel(string name, int maxLogsPerBatch, TimeSpan batchTimeInterval, int maxParallelBatches)
{
ThrowIfDisposed();
lock (_channelGroupLock)
{
AppCenterLog.Debug(AppCenterLog.LogTag, $"AddChannel({name})");
var newChannel = new Channel(name, maxLogsPerBatch, batchTimeInterval, maxParallelBatches, AppSecret,
_ingestion, _storage);
AddChannel(newChannel);
return(newChannel);
}
}
/// <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");
}
}
/// <summary>
/// Asynchronously retrieves logs from storage and flags them to avoid duplicate retrievals on subsequent calls
/// </summary>
/// <param name="channelName">Name of the channel to retrieve logs from</param>
/// <param name="limit">The maximum number of logs to retrieve</param>
/// <param name="logs">A list to which the retrieved logs will be added</param>
/// <returns>A batch ID for the set of returned logs; null if no logs are found</returns>
/// <exception cref="StorageException"/>
public Task <string> GetLogsAsync(string channelName, int limit, List <Log> logs)
{
return(AddTaskToQueue(() =>
{
logs?.Clear();
var retrievedLogs = new List <Log>();
AppCenterLog.Debug(AppCenterLog.LogTag,
$"Trying to get up to {limit} logs from storage for {channelName}");
var idPairs = new List <Tuple <Guid?, long> >();
var failedToDeserializeALog = false;
var objectEntries = _storageAdapter.Select(TableName, ColumnChannelName, channelName, ColumnIdName, _pendingDbIdentifiers.Cast <object>().ToArray(), limit);
var retrievedEntries = objectEntries.Select(entries =>
new LogEntry()
{
Id = (long)entries[0],
Channel = (string)entries[1],
Log = (string)entries[2]
}
).ToList();
foreach (var entry in retrievedEntries)
{
try
{
var log = LogSerializer.DeserializeLog(entry.Log);
retrievedLogs.Add(log);
idPairs.Add(Tuple.Create(log.Sid, Convert.ToInt64(entry.Id)));
}
catch (JsonException e)
{
AppCenterLog.Error(AppCenterLog.LogTag, "Cannot deserialize a log in storage", e);
failedToDeserializeALog = true;
_storageAdapter.Delete(TableName, ColumnIdName, entry.Id);
}
}
if (failedToDeserializeALog)
{
AppCenterLog.Warn(AppCenterLog.LogTag, "Deleted logs that could not be deserialized");
}
if (idPairs.Count == 0)
{
AppCenterLog.Debug(AppCenterLog.LogTag,
$"No available logs in storage for channel '{channelName}'");
return null;
}
// Process the results
var batchId = Guid.NewGuid().ToString();
ProcessLogIds(channelName, batchId, idPairs);
logs?.AddRange(retrievedLogs);
return batchId;
}));
}
// Internal and static so that it can be tested more easily
internal static bool HasSessionTimedOut(long now, long lastQueuedLogTime, long lastResumedTime, long lastPausedTime)
{
if (lastPausedTime == 0)
{
return(false);
}
var noLogSentForLong = lastQueuedLogTime == 0 || now - lastQueuedLogTime >= SessionTimeout;
var wasBackgroundForLong = lastResumedTime - Math.Max(lastPausedTime, lastQueuedLogTime) >= SessionTimeout;
AppCenterLog.Debug(Analytics.Instance.LogTag, $"noLogSentForLong={noLogSentForLong} " +
$"wasBackgroundForLong={wasBackgroundForLong}");
return(noLogSentForLong && wasBackgroundForLong);
}
/// <summary>
/// Asynchronously retrieves logs from storage and flags them to avoid duplicate retrievals on subsequent calls
/// </summary>
/// <param name="channelName">Name of the channel to retrieve logs from</param>
/// <param name="limit">The maximum number of logs to retrieve</param>
/// <param name="logs">A list to which the retrieved logs will be added</param>
/// <returns>A batch ID for the set of returned logs; null if no logs are found</returns>
/// <exception cref="StorageException"/>
public Task <string> GetLogsAsync(string channelName, int limit, List <Log> logs)
{
return(AddTaskToQueue(() =>
{
logs?.Clear();
var retrievedLogs = new List <Log>();
AppCenterLog.Debug(AppCenterLog.LogTag,
$"Trying to get up to {limit} logs from storage for {channelName}");
var idPairs = new List <Tuple <Guid?, long> >();
var failedToDeserializeALog = false;
var retrievedEntries =
_storageAdapter.GetAsync <LogEntry>(entry => entry.Channel == channelName, limit)
.GetAwaiter().GetResult();
foreach (var entry in retrievedEntries)
{
if (_pendingDbIdentifiers.Contains(entry.Id))
{
continue;
}
try
{
var log = LogSerializer.DeserializeLog(entry.Log);
retrievedLogs.Add(log);
idPairs.Add(Tuple.Create(log.Sid, Convert.ToInt64(entry.Id)));
}
catch (JsonException e)
{
AppCenterLog.Error(AppCenterLog.LogTag, "Cannot deserialize a log in storage", e);
failedToDeserializeALog = true;
_storageAdapter.DeleteAsync <LogEntry>(row => row.Id == entry.Id)
.GetAwaiter().GetResult();
}
}
if (failedToDeserializeALog)
{
AppCenterLog.Warn(AppCenterLog.LogTag, "Deleted logs that could not be deserialized");
}
if (idPairs.Count == 0)
{
AppCenterLog.Debug(AppCenterLog.LogTag,
$"No available logs in storage for channel '{channelName}'");
return null;
}
// Process the results
var batchId = Guid.NewGuid().ToString();
ProcessLogIds(channelName, batchId, idPairs);
logs?.AddRange(retrievedLogs);
return batchId;
}));
}
private async Task <PushNotificationChannel> CreatePushNotificationChannelAsync()
{
PushNotificationChannel channel = null;
try
{
// If this isn't the first time after installation, the notification channel is created successfully even without network.
channel = await new WindowsPushNotificationChannelManager().CreatePushNotificationChannelForApplicationAsync()
.AsTask().ConfigureAwait(false);
}
catch (Exception exception)
{
if (NetworkStateAdapter.IsConnected)
{
AppCenterLog.Error(LogTag, "Unable to create notification channel.", exception);
return(null);
}
}
if (channel != null)
{
return(channel);
}
AppCenterLog.Debug(LogTag, "The network isn't connected, another attempt will be made after the network is available.");
var networkSemaphore = new SemaphoreSlim(0);
void NetworkStateChangeHandler(object sender, EventArgs e)
{
if (NetworkStateAdapter.IsConnected)
{
networkSemaphore.Release();
}
}
NetworkStateAdapter.NetworkStatusChanged += NetworkStateChangeHandler;
await networkSemaphore.WaitAsync().ConfigureAwait(false);
NetworkStateAdapter.NetworkStatusChanged -= NetworkStateChangeHandler;
AppCenterLog.Debug(LogTag, "Second attempt to create notification channel...");
try
{
// Second attempt is the last one anyway.
return(await new WindowsPushNotificationChannelManager().CreatePushNotificationChannelForApplicationAsync()
.AsTask().ConfigureAwait(false));
}
catch (Exception exception)
{
AppCenterLog.Error(LogTag, "Unable to create notification channel.", exception);
return(null);
}
}
public void Pause()
{
lock (_lockObject)
{
if (_currentSessionState == SessionState.Inactive)
{
AppCenterLog.Warn(Analytics.Instance.LogTag, "Trying to pause already inactive session.");
return;
}
AppCenterLog.Debug(Analytics.Instance.LogTag, "SessionTracker.Pause");
_lastPausedTime = TimeHelper.CurrentTimeInMilliseconds();
_currentSessionState = SessionState.Inactive;
}
}