Add a few null checks to avoid unwanted exceptions in the engine scheduler

Author: ethanhann

IntegrationEngine/Scheduler/EngineScheduler.cs

@@ -37,7 +37,10 @@ public void Shutdown()
         public Type GetRegisteredJobTypeByName(string jobTypeName)
         {
             var jobTypes = IntegrationJobTypes.Where(x => x.FullName == jobTypeName);
-            return jobTypes.Any() ? jobTypes.Single() : null;
+            if (jobTypes.Any())
+                return jobTypes.Single();
+            Log.Warn(x => x("JobType is not registered: {0}", jobTypeName));
+            return null;
         }
 
         public bool IsJobTypeRegistered(string jobTypeName)
@@ -72,6 +75,8 @@ public virtual void ScheduleJobWithTrigger<T>(T item)
             where T : IIntegrationJobTrigger
         {
             var jobType = GetRegisteredJobTypeByName(item.JobType);
+            if (jobType == null)
+                return;
             var jobDetail = JobDetailFactory(jobType, item.Parameters, item);
             var trigger = TriggerFactory(item, jobType, jobDetail);
             TryScheduleJobWithTrigger(trigger, jobType, jobDetail, item.StateId);