/// <summary>
/// This method saves the description (eventString) and timestamp of the recentmost induced fault as
/// a ChaosEntry in a Reliable Dictionary
/// </summary>
/// <param name="eventString"></param>
/// <returns>A task to await on</returns>
private async Task StoreEventAsync(string eventString)
{
ServiceEventSource.Current.ServiceMessage(this, "ChaosTest: {0}", eventString);
IReliableDictionary <string, long> eventCount =
await this.StateManager.GetOrAddAsync <IReliableDictionary <string, long> >(StringResource.EventCountKey);
IReliableDictionary <string, DateTime> startTime =
await this.StateManager.GetOrAddAsync <IReliableDictionary <string, DateTime> >(StringResource.StartTimeKey);
IReliableDictionary <long, ChaosEntry> savedEvents =
await this.StateManager.GetOrAddAsync <IReliableDictionary <long, ChaosEntry> >(StringResource.SavedEventsKey);
using (ITransaction tx = this.StateManager.CreateTransaction())
{
if (!await startTime.ContainsKeyAsync(tx, StringResource.StartTimeKey))
{
await startTime.AddAsync(tx, StringResource.StartTimeKey, DateTime.UtcNow);
}
if (!await eventCount.ContainsKeyAsync(tx, StringResource.EventCountKey))
{
await eventCount.AddAsync(tx, StringResource.EventCountKey, 0);
}
ConditionalValue <long> result =
await eventCount.TryGetValueAsync(tx, StringResource.EventCountKey, LockMode.Update);
if (result.HasValue)
{
long currentCount = result.Value;
// If we have HistoryLength number of events, we make room for new events by removing oldest ones,
// always keeping HistoryLength number of recentmost events on the show on the webpage.
if (currentCount > Constants.HistoryLength - 1)
{
await savedEvents.TryRemoveAsync(tx, currentCount - Constants.HistoryLength + 1);
}
ChaosEntry chaosEntry = new ChaosEntry
{
Record = eventString,
TimeStamp = DateTime.UtcNow.ToString(CultureInfo.InvariantCulture)
};
await savedEvents.AddAsync(tx, ++currentCount, chaosEntry);
await eventCount.SetAsync(tx, StringResource.EventCountKey, currentCount);
await tx.CommitAsync();
}
}
}
/// <summary>
/// This method saves the description (eventString) and timestamp of the recentmost induced fault as
/// a ChaosEntry in a Reliable Dictionary
/// </summary>
/// <param name="eventString"></param>
/// <returns>A task to await on</returns>
private async Task StoreEventAsync(string eventString)
{
ServiceEventSource.Current.ServiceMessage(this, "ChaosTest: {0}", eventString);
IReliableDictionary<string, long> eventCount =
await this.StateManager.GetOrAddAsync<IReliableDictionary<string, long>>(StringResource.EventCountKey);
IReliableDictionary<string, DateTime> startTime =
await this.StateManager.GetOrAddAsync<IReliableDictionary<string, DateTime>>(StringResource.StartTimeKey);
IReliableDictionary<long, ChaosEntry> savedEvents =
await this.StateManager.GetOrAddAsync<IReliableDictionary<long, ChaosEntry>>(StringResource.SavedEventsKey);
using (ITransaction tx = this.StateManager.CreateTransaction())
{
if (!await startTime.ContainsKeyAsync(tx, StringResource.StartTimeKey))
{
await startTime.AddAsync(tx, StringResource.StartTimeKey, DateTime.UtcNow);
}
if (!await eventCount.ContainsKeyAsync(tx, StringResource.EventCountKey))
{
await eventCount.AddAsync(tx, StringResource.EventCountKey, 0);
}
ConditionalValue<long> result =
await eventCount.TryGetValueAsync(tx, StringResource.EventCountKey, LockMode.Update);
if (result.HasValue)
{
long currentCount = result.Value;
// If we have HistoryLength number of events, we make room for new events by removing oldest ones,
// always keeping HistoryLength number of recentmost events on the show on the webpage.
if (currentCount > Constants.HistoryLength - 1)
{
await savedEvents.TryRemoveAsync(tx, currentCount - Constants.HistoryLength + 1);
}
ChaosEntry chaosEntry = new ChaosEntry
{
Record = eventString,
TimeStamp = DateTime.UtcNow.ToString(CultureInfo.InvariantCulture)
};
await savedEvents.AddAsync(tx, ++currentCount, chaosEntry);
await eventCount.SetAsync(tx, StringResource.EventCountKey, currentCount);
await tx.CommitAsync();
}
}
}
