public TaskExecutionStartResponse Start(TaskExecutionStartRequest startRequest)
{
ValidateStartRequest(startRequest);
var taskDefinition = _taskRepository.EnsureTaskDefinition(startRequest.TaskId);
if (startRequest.TaskDeathMode == TaskDeathMode.KeepAlive)
return StartKeepAliveExecution(startRequest, taskDefinition.TaskDefinitionId);
if (startRequest.TaskDeathMode == TaskDeathMode.Override)
return StartOverrideExecution(startRequest, taskDefinition.TaskDefinitionId);
throw new ExecutionException("Unsupported TaskDeathMode");
}
private TaskExecutionStartResponse StartOverrideExecution(TaskExecutionStartRequest startRequest, int taskDefinitionId)
{
var taskExecutionId = CreateOverrideTaskExecution(startRequest.TaskId, taskDefinitionId, startRequest.OverrideThreshold.Value, startRequest.ReferenceValue,
startRequest.FailedTaskRetryLimit, startRequest.DeadTaskRetryLimit, startRequest.TasklingVersion, startRequest.TaskExecutionHeader);
RegisterEvent(startRequest.TaskId, taskExecutionId.ToString(), EventType.Start, null);
var tokenResponse = TryGetExecutionToken(startRequest.TaskId, taskDefinitionId, taskExecutionId, startRequest.ConcurrencyLimit);
if (tokenResponse.GrantStatus == GrantStatus.Denied)
{
SetBlockedOnTaskExecution(startRequest.TaskId, taskExecutionId.ToString());
RegisterEvent(startRequest.TaskId, taskExecutionId.ToString(), EventType.Blocked, null);
}
return tokenResponse;
}
private void ValidateStartRequest(TaskExecutionStartRequest startRequest)
{
if (startRequest.TaskDeathMode == TaskDeathMode.KeepAlive)
{
if (!startRequest.KeepAliveInterval.HasValue)
throw new ExecutionArgumentsException("KeepAliveInterval must be set when using KeepAlive mode");
if (!startRequest.KeepAliveDeathThreshold.HasValue)
throw new ExecutionArgumentsException("KeepAliveDeathThreshold must be set when using KeepAlive mode");
}
else if (startRequest.TaskDeathMode == TaskDeathMode.Override)
{
if (!startRequest.OverrideThreshold.HasValue)
throw new ExecutionArgumentsException("OverrideThreshold must be set when using Override mode");
}
}