/**
* Determine the required task(s) to handle the initial workflow message.
*
* In most cases only one task is required, but if the message handler is located on another processing node,
* the workflow needs to set up two tasks. One for triggering a sub process on the remote processing node and
* one that is assigned to the sub process and actually triggers the processing of the message on the remote node.
*
* @param Message $startMessage
* @param MessageHandler $firstMessageHandler
* @return Task[]
* @throws \RuntimeException
* @throws Workflow\Exception\StartTaskIsAlreadyDefined
*/
public function determineFirstTasks(Message $startMessage, MessageHandler $firstMessageHandler)
{
if ($this->hasStartMessage()) {
throw StartTaskIsAlreadyDefined::forWorkflow($this);
}
$tasks = [];
$taskMetadata = $startMessage->processingMetadata();
//@TODO: Implement sub process set up
if (!$this->processingNodeName()->equals($firstMessageHandler->processingNodeName())) {
throw new \RuntimeException("Running message handler on different nodes is not supported yet!");
}
$task = $this->scheduleTaskFor($firstMessageHandler, $taskMetadata, $startMessage);
$nextMessage = $task->emulateWorkflowMessage();
$processType = $this->determineProcessType($nextMessage, $firstMessageHandler);
$this->recordThat(StartMessageWasAssignedToWorkflow::record($startMessage, $this));
$process = Process::ofType($processType, ProcessId::generate());
$this->recordThat(ProcessWasAddedToWorkflow::record($process, $this));
$this->recordThat(TaskWasAddedToProcess::record($this->workflowId(), $process, $task));
$tasks[] = $task;
return $tasks;
}
/**
* @test
*/
function it_is_created_with_a_specific_process_type_and_an_empty_task_list()
{
$process = Process::ofType(ProcessType::linearMessaging(), ProcessId::generate());
$this->assertTrue(ProcessType::linearMessaging()->equals($process->type()));
$this->assertEmpty($process->tasks());
}
