/// <summary>
/// Start a new workflow
/// </summary>
/// <param name="json">The entire message body from the request</param>
/// <returns></returns>
public string StartWorkflow(string json)
{
// This presently uses the Event as the body of the start message because it's convenient
//
var workflowName = "";
var workflowVersion = "";
var executionId = Guid.NewGuid();
try
{
// Neither of these operation should ever fail as they cannot be conflicted
var wfStartData = JsonConvert.DeserializeObject <WorkflowExecutionStartedEvent>(json);
workflowName = wfStartData.WorkflowName;
workflowVersion = wfStartData.WorkflowVersion;
var wf = GetWorkflow(workflowName, workflowVersion);
if (wf == null)
{
log.Error($"Unknown workflow definition - {workflowName} v {workflowVersion} ");
throw new ApplicationException($"Unknown workflow definition - {workflowName} v {workflowVersion} ");
}
var wfDefinition = JsonConvert.DeserializeObject <WorkflowObj>(wf.Json);
Executions.InsertOnSubmit(new Execution
{
ExecutionId = executionId,
JobId = (string)wfStartData.Input.SelectToken("_jobId"),
Workflow = wf,
DecisionList = wfStartData.DecisionList ?? wfDefinition.DecisionList ?? "decider",
ExecutionStartToCloseTimeout = (int?)(wfStartData.ExecutionStartToCloseTimeout ?? wfDefinition.DefaultExecutionStartToCloseTimeout),
TaskStartToCloseTimeout = (int?)(wfStartData.TaskStartToCloseTimeout ?? wfDefinition.DefaultTaskStartToCloseTimeout),
TaskScheduleToCloseTimeout = null, // What goes here?
TaskScheduleToStartTimeout = null, // and here?
HistorySeen = 0,
AwaitingDecision = true,
LastSeen = DateTime.UtcNow,
ExecutionState = new ExecutionState {
State = ExState.Running
}
});
wfStartData.ExecutionId = executionId;
wfStartData.Id = 0;
wfStartData.Timestamp = DateTime.UtcNow;
Histories.InsertOnSubmit(wfStartData);
SubmitChanges(ConflictMode.FailOnFirstConflict);
}
catch (ChangeConflictException ex)
{
log.Error("Failed to create new workflow execution", ex);
throw new ApplicationException($"Failed to create new workflow execution - {workflowName} v {workflowVersion} ");
}
return(new JObject(new JProperty("executionId", executionId.ToString())).ToString(Formatting.None));
}