public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
var httpMethod = context.HttpContext.Request.Method;
var routeValues = context.RouteData.Values;
var workflowTypeEntries = await _workflowTypeRouteEntries.GetWorkflowRouteEntriesAsync(httpMethod, routeValues);
var workflowEntries = await _workflowRouteEntries.GetWorkflowRouteEntriesAsync(httpMethod, routeValues);
if (workflowTypeEntries.Any())
{
var workflowTypeIds = workflowTypeEntries.Select(x => Int32.Parse(x.WorkflowId)).ToList();
var workflowTypes = (await _workflowTypeStore.GetAsync(workflowTypeIds)).ToDictionary(x => x.Id);
var correlationId = routeValues.GetValue <string>("correlationid");
foreach (var entry in workflowTypeEntries)
{
if (workflowTypes.TryGetValue(Int32.Parse(entry.WorkflowId), out var workflowType))
{
var activity = workflowType.Activities.Single(x => x.ActivityId == entry.ActivityId);
if (activity.IsStart)
{
// If this is not a singleton workflow or there is not already an halted instance, start a new workflow.
if (!workflowType.IsSingleton || !await _workflowStore.HasHaltedInstanceAsync(workflowType.WorkflowTypeId))
{
await _workflowManager.StartWorkflowAsync(workflowType, activity, null, correlationId);
}
}
}
}
}
if (workflowEntries.Any())
{
var workflowIds = workflowEntries.Select(x => x.WorkflowId).ToList();
var workflows = (await _workflowStore.GetAsync(workflowIds)).ToDictionary(x => x.WorkflowId);
var correlationId = routeValues.GetValue <string>("correlationid");
foreach (var entry in workflowEntries)
{
if (workflows.TryGetValue(entry.WorkflowId, out var workflow) &&
(String.IsNullOrWhiteSpace(correlationId) ||
workflow.CorrelationId == correlationId))
{
var blockingActivity = workflow.BlockingActivities.Single(x => x.ActivityId == entry.ActivityId);
await _workflowManager.ResumeWorkflowAsync(workflow, blockingActivity);
}
}
}
await next();
}
public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
var httpMethod = context.HttpContext.Request.Method;
var routeValues = context.RouteData.Values;
var workflowTypeEntries = await _workflowTypeRouteEntries.GetWorkflowRouteEntriesAsync(httpMethod, routeValues);
var workflowEntries = await _workflowRouteEntries.GetWorkflowRouteEntriesAsync(httpMethod, routeValues);
if (workflowTypeEntries.Any())
{
var workflowTypeIds = workflowTypeEntries.Select(x => Int32.Parse(x.WorkflowId)).ToList();
var workflowTypes = (await _workflowTypeStore.GetAsync(workflowTypeIds)).ToDictionary(x => x.Id);
var correlationId = routeValues.GetValue <string>("correlationid");
foreach (var entry in workflowTypeEntries)
{
if (workflowTypes.TryGetValue(Int32.Parse(entry.WorkflowId), out var workflowType))
{
var activity = workflowType.Activities.Single(x => x.ActivityId == entry.ActivityId);
if (activity.IsStart)
{
// If a singleton, try to acquire a lock per workflow type.
(var locker, var locked) = await _distributedLock.TryAcquireWorkflowTypeLockAsync(workflowType);
if (!locked)
{
continue;
}
await using var acquiredLock = locker;
// Check if this is a workflow singleton and there's already an halted instance on any activity.
if (workflowType.IsSingleton && await _workflowStore.HasHaltedInstanceAsync(workflowType.WorkflowTypeId))
{
continue;
}
await _workflowManager.StartWorkflowAsync(workflowType, activity, null, correlationId);
}
}
}
}
if (workflowEntries.Any())
{
var workflowIds = workflowEntries.Select(x => x.WorkflowId).ToList();
var workflows = (await _workflowStore.GetAsync(workflowIds)).ToDictionary(x => x.WorkflowId);
var correlationId = routeValues.GetValue <string>("correlationid");
foreach (var entry in workflowEntries)
{
if (workflows.TryGetValue(entry.WorkflowId, out var workflow) &&
(String.IsNullOrWhiteSpace(correlationId) ||
workflow.CorrelationId == correlationId))
{
// If atomic, try to acquire a lock per workflow instance.
(var locker, var locked) = await _distributedLock.TryAcquireWorkflowLockAsync(workflow);
if (!locked)
{
continue;
}
await using var acquiredLock = locker;
// If atomic, check if the workflow still exists and is still correlated.
var haltedWorkflow = workflow.IsAtomic ? await _workflowStore.GetAsync(workflow.Id) : workflow;
if (haltedWorkflow == null || (!String.IsNullOrWhiteSpace(correlationId) && haltedWorkflow.CorrelationId != correlationId))
{
continue;
}
// And if it is still halted on this activity.
var blockingActivity = haltedWorkflow.BlockingActivities.SingleOrDefault(x => x.ActivityId == entry.ActivityId);
if (blockingActivity != null)
{
await _workflowManager.ResumeWorkflowAsync(haltedWorkflow, blockingActivity);
}
}
}
}
await next();
}
