private async Task<IList<WatcherExecutionResult>> TryExecuteWatcherCheckAndHooksAsync(WatcherConfiguration watcherConfiguration)
{
var startedAt = _configuration.DateTimeProvider();
var watcher = watcherConfiguration.Watcher;
IWardenCheckResult wardenCheckResult = null;
var results = new List<WatcherExecutionResult>();
try
{
await InvokeOnStartHooksAsync(watcherConfiguration, WatcherCheck.Create(watcher));
var watcherCheckResult = await watcher.ExecuteAsync();
var completedAt = _configuration.DateTimeProvider();
wardenCheckResult = WardenCheckResult.Create(watcherCheckResult, startedAt, completedAt);
var watcherResults = await ExecuteWatcherCheckAsync(watcher, watcherCheckResult, wardenCheckResult,
watcherConfiguration);
results.AddRange(watcherResults);
}
catch (Exception exception)
{
var completedAt = _configuration.DateTimeProvider();
wardenCheckResult = WardenCheckResult.Create(WatcherCheckResult.Create(watcher, false),
startedAt, completedAt, exception);
results.Add(new WatcherExecutionResult(watcher, WatcherResultState.Error,
GetPreviousWatcherState(watcher), wardenCheckResult, exception));
await UpdateWatcherResultStateAndExecuteHooksPossibleAsync(watcher, WatcherResultState.Error,
() => InvokeOnFirstErrorHooksAsync(watcherConfiguration, exception));
var wardenException = new WardenException("There was an error while executing Warden " +
$"caused by watcher: '{watcher.Name}'.", exception);
await InvokeOnErrorHooksAsync(watcherConfiguration, wardenException);
}
finally
{
await InvokeOnCompletedHooksAsync(watcherConfiguration, wardenCheckResult);
}
return results;
}
/// <summary>
/// Run a single iteration (cycle) that will execute all of the watchers and theirs hooks.
/// </summary>
/// <param name="wardenName">Name of the Warden that will execute the iteration.</param>
/// <param name="ordinal">Number (ordinal) of executed iteration</param>
/// <returns>Single iteration containing its ordinal and results of all executed watcher checks</returns>
public async Task <IWardenIteration> ExecuteAsync(string wardenName, long ordinal)
{
var iterationStartedAt = _configuration.DateTimeProvider();
var results = new List <WatcherExecutionResult>();
var iterationTasks = _configuration.Watchers.Select(async watcherConfiguration =>
{
var startedAt = _configuration.DateTimeProvider();
var watcher = watcherConfiguration.Watcher;
IWardenCheckResult wardenCheckResult = null;
try
{
await InvokeOnStartHooksAsync(watcherConfiguration, WatcherCheck.Create(watcher));
var watcherCheckResult = await watcher.ExecuteAsync();
var completedAt = _configuration.DateTimeProvider();
wardenCheckResult = WardenCheckResult.Create(watcherCheckResult, startedAt, completedAt);
if (watcherCheckResult.IsValid)
{
var result = wardenCheckResult;
results.Add(new WatcherExecutionResult(watcher, WatcherResultState.Success,
GetPreviousWatcherState(watcher), result));
await UpdateWatcherResultStateAndExecuteHooksPossibleAsync(watcher, WatcherResultState.Success,
() => InvokeOnFirstSuccessHooksAsync(watcherConfiguration, result),
executeIfLatestStateIsNotSet: false);
await InvokeOnSuccessHooksAsync(watcherConfiguration, wardenCheckResult);
}
else
{
var result = wardenCheckResult;
results.Add(new WatcherExecutionResult(watcher, WatcherResultState.Failure,
GetPreviousWatcherState(watcher), result));
await UpdateWatcherResultStateAndExecuteHooksPossibleAsync(watcher, WatcherResultState.Failure,
() => InvokeOnFirstFailureHooksAsync(watcherConfiguration, result));
await InvokeOnFailureHooksAsync(watcherConfiguration, wardenCheckResult);
}
}
catch (Exception exception)
{
var completedAt = _configuration.DateTimeProvider();
wardenCheckResult = WardenCheckResult.Create(WatcherCheckResult.Create(watcher, false),
startedAt, completedAt, exception);
results.Add(new WatcherExecutionResult(watcher, WatcherResultState.Error,
GetPreviousWatcherState(watcher), wardenCheckResult, exception));
await UpdateWatcherResultStateAndExecuteHooksPossibleAsync(watcher, WatcherResultState.Error,
() => InvokeOnFirstErrorHooksAsync(watcherConfiguration, exception));
var wardenException = new WardenException("There was an error while executing Warden " +
$"caused by watcher: '{watcher.Name}'.", exception);
await InvokeOnErrorHooksAsync(watcherConfiguration, wardenException);
}
finally
{
await InvokeOnCompletedHooksAsync(watcherConfiguration, wardenCheckResult);
}
});
await Task.WhenAll(iterationTasks);
await ExecuteAggregatedHooksAsync(results);
var iterationCompletedAt = _configuration.DateTimeProvider();
var iteration = WardenIteration.Create(wardenName, ordinal, results.Select(x => x.WardenCheckResult),
iterationStartedAt, iterationCompletedAt);
return(iteration);
}