async Task <bool> ForwardMessage <T>(Message <T> message, CancellationToken cancellationToken) where T : IHaveType
{
var payload = message.Payload as IHaveType;
var jobs = workerRegistry.GetHandlersFor(message.Payload)
.Select(handler => new Job(generator.NewReference <Job>(), payload.GetAddress(), handler, message.Id,
payload.GetQueueId(), message.Created))
.ToList();
using (var dbContextScope = dbContextScopeFactory.Create())
{
await jobRepository.SaveAll(jobs);
message.MarkAsProcessed();
switch (message)
{
case Command command:
await commandRepository.Save(command);
break;
case Event @event:
await eventRepository.Save(@event);
break;
}
await dbContextScope.SaveChangesAsync(cancellationToken);
}
foreach (var job in jobs)
{
jobScheduler.Add(job);
}
return(true);
}
protected override async Task ExecuteAsync(CancellationToken cancellationToken)
{
logger.LogInformation("Starting job runner.");
cancellationToken.Register(Stop);
var existingJobs = await FetchExistingJobs();
//TODO Way to ensure that new jobs cannot arrive ahead of existing jobs
//as we start up.
foreach (var job in existingJobs)
{
logger.LogInformation("Adding job.");
jobScheduler.Add(job);
}
logger.LogInformation("Starting job scheduler");
await jobScheduler.Start(cancellationToken);
logger.LogInformation("No more work!");
await jobScheduler.Stop();
}
