public TaskResult(TaskNode task, bool success, object returnValue, Exception exception)
{
Task = task;
Success = success;
ReturnValue = returnValue;
Exception = exception;
}
private TaskResult ExecuteTask(TaskNode task, Func <string, bool> circularDependencyGuard)
{
if (!task.Dependencies.Any() && task.Definition.Implementation == null)
{
_log.LogTrace($"Skipping empty task: {task.Definition.Name}");
return(new TaskResult(task, success: true, returnValue: null, exception: null));
}
using (var activity = _log.BeginActivity("TASK", task.Definition.Name))
{
// Run dependencies
TaskResult result;
var dependencyResults = new Dictionary <string, TaskResult>();
foreach (var dependency in task.Dependencies)
{
if (circularDependencyGuard(dependency.Definition.Name))
{
throw new InvalidOperationException($"Circular dependency detected at '{dependency.Definition.Name}'");
}
result = ExecuteTask(dependency, ChainPredicate(circularDependencyGuard, dependency.Definition.Name));
if (!result.Success)
{
return(result);
}
dependencyResults[dependency.Definition.Name] = result;
}
// Run the task itself
result = ExecuteTask(new TaskInvocation(task, _services, dependencyResults));
activity.Success = result.Success;
if (result.Exception != null)
{
activity.Conclusion = $"failed with {result.Exception.GetType().Name}: {result.Exception.Message}";
}
return(result);
}
}
public TaskInvocation(TaskNode task, IServiceProvider services, Dictionary <string, TaskResult> dependencyResults)
{
Task = task;
Services = services;
DependencyResults = dependencyResults;
}