Shiny Job issue on iPhone

[yaroslavyuzykCS]

I am currently experiencing an issue with running jobs in Shiny on an iPhone and would appreciate your assistance in resolving it.

Issue Description:

• Shiny Version: 3.3.3
• Operating System: iOS

Steps to Reproduce:

1. Added references in my *.csproj file:

   <PackageReference Include="Shiny.Jobs" Version="3.3.3" />
   <PackageReference Include="Shiny.Hosting.Maui" Version="3.3.3" />
   

2. Aded .UseShiny() in my MauiProgram.cs file.

3. Created PrivacyInfo.xcprivacy file inside Platforms/iOS and added a reference in the *.csproj file:

    <ItemGroup Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">
        <BundleResource Include="Platforms\iOS\PrivacyInfo.xcprivacy" LogicalName="PrivacyInfo.xcprivacy" />
    </ItemGroup>
   

4. In my Info.plist I have added:

    <key>UIBackgroundModes</key>
    <array>        
        <string>processing</string>
        <string>fetch</string>            
    </array>
    
    <key>BGTaskSchedulerPermittedIdentifiers</key>
    <array>
        <string>com.shiny.job</string>
        <string>com.shiny.jobpower</string>
        <string>com.shiny.jobnet</string>
        <string>com.shiny.jobpowernet</string>
    </array> 
   

5. Added permissions in AndroidManifest.xml

6. My Job:

public class TimeClockSyncJob : IJob
{
    public async Task Run(JobInfo jobInfo, CancellationToken cancelToken)
    {	
       CoreInitializer.Container.GetService<IDialogService>().ShowMessage("Shiny Job", "Shiny Job has run.", "OK");
    }
}

7. My Service:

public class TimeClockQueueMessagingService : ITimeClockQueueMessagingService
{
   private readonly IJobManager? _jobManager;

   public TimeClockQueueMessagingService(IJobManager jobManager)
   {
      _jobManager = jobManager;
   }

   public async void Schedule()
   {
      var access = await _jobManager.RequestAccess();
      if (access != AccessState.Available)
      {
         await CoreInitializer.Container.GetService<IDialogService>()?.ShowMessage( "Error", "Job permissions failed: " + access, "OK");
	 return;
      }

      var job = new JobInfo(nameof(TimeClockSyncJob), typeof(TimeClockSyncJob))
      {
         BatteryNotLow = false,
	 DeviceCharging = false,
	 RequiredInternetAccess = InternetAccess.Any
      };
      _jobManager.Register(job);

      if (DeviceInfo.Platform == DevicePlatform.iOS)
      {
	  await _jobManager.Run(nameof(TimeClockSyncJob));
      }
   }
}

8. Also I added:

   builder.Services.AddSingleton<IRepository, FileSystemRepository>();
   builder.Services.AddSingleton<IJobManager, JobManager>();
   builder.Services.AddSingleton<ITimeClockQueueMessagingService, TimeClockQueueMessagingService>();
   

Yes, I was forced to add:

```
builder.Services.AddSingleton<IRepository, FileSystemRepository>();
builder.Services.AddSingleton<IJobManager, JobManager>();
```

Otherwise there var access = await _jobManager.RequestAccess(); would result in a NullReference.

Everything works correctly on Android devices. I can see the "Shiny Job has run" alert.
However, on iPhone, I see the "Job permissions failed: NotSetup" alert.
If I remove the RequestAccess check, I get a crash at the line - _jobManager.Register(job);
StackTrace:

ObjCRuntime.ObjCException: Objective-C exception thrown.  Name: NSInternalInconsistencyException Reason: No launch handler registered for task with identifier com.shiny.jobnet
Native stack trace:
	0   CoreFoundation                      0x000000019b9c4f2c 00E76A98-210C-3CB5-930B-F236807FF24C + 540460
	1   libobjc.A.dylib                     0x0000000193876018 objc_exception_throw + 60
	2   Foundation                          0x000000019aecb868 3D3A12E3-F5E9-361F-B00A-4A5E8861AA55 + 7202920
	3   BackgroundTasks                     0x0000000217d1ed54 71F03BA3-E2A3-34E3-A2D1-6A15C50E9D9A + 7508
	4   BackgroundTasks                     0x0000000217d1ea94 71F03BA3-E2A3-34E3-A2D1-6A15C50E9D9A + 6804
	5   Project                         0x0000000102266088 xamarin_dyn_objc_msgSend + 160
	6   Project                         0x000000010222195c interp_to_native_trampoline + 156
	7   Project                         0x0000000102589fcc ves_pinvoke_method + 568
	8   Project                         0x000000010257e724 mono_interp_exec_method + 3000
	9   Project                         0x000000010257c218 interp_runtime_invoke + 236
	10  Project                         0x000000010254ae9c mono_jit_runtime_invoke + 1116
	11  Project                         0x00000001024f2600 mono_runtime_invoke_checked + 148
	12  Project                         0x00000001024f6384 mono_runtime_invoke + 536
	13  Project                         0x000000010263499c _ZL30native_to_managed_trampoline_1P11objc_objectP13objc_selectorPP11_MonoMethodj + 344
	14  Project                         0x000000010268bd54 -[__MonoMac_NSAsyncSynchronizationContextDispatcher xamarinApplySelector] + 44
	15  Foundation                          0x000000019a8a1aa4 3D3A12E3-F5E9-361F-B00A-4A5E8861AA55 + 740004
	16  CoreFoundation                      0x000000019b997834 00E76A98-210C-3CB5-930B-F236807FF24C + 354356
	17  CoreFoundation                      0x000000019b9977c8 00E76A98-210C-3CB5-930B-F236807FF24C + 354248
	18  CoreFoundation                      0x000000019b995298 00E76A98-210C-3CB5-930B-F236807FF24C + 344728
	19  CoreFoundation                      0x000000019b994484 00E76A98-210C-3CB5-930B-F236807FF24C + 341124
	20  CoreFoundation                      0x000000019b993cd8 CFRunLoopRunSpecific + 608
	21  GraphicsServices                    0x00000001e08441a8 GSEventRunModal + 164
	22  UIKitCore                           0x000000019dfcc90c 1741FA37-4E53-371E-8DAE-D611AAB0043D + 4237580
	23  UIKitCore                           0x000000019e0809d0 UIApplicationMain + 340
	24  Project                         0x00000001022385f4 xamarin_UIApplicationMain + 60
	25  Project                         0x000000010258b340 do_icall + 316
	26  Project                         0x0000000102589c40 do_icall_wrapper + 348
	27  Project                         0x000000010257e64c mono_interp_exec_method + 2784
	28  Project                         0x000000010257c218 interp_runtime_invoke + 236
	29  Project                         0x000000010254ae9c mono_jit_runtime_invoke + 1116
	30  Project                         0x00000001024f2600 mono_runtime_invoke_checked + 148
	31  Project                         0x00000001024f88fc mono_runtime_exec_main_checked + 116
	32  Project                         0x000000010255049c mono_jit_exec + 356
	33  Project                         0x0000000102264ffc xamarin_main + 2336
	34  Project                         0x00000001026345d8 main + 64
	35  dyld                                0x00000001bf045e4c 71846EAC-EE65-3697-BF7D-790B6A07DCDB + 249420

   at BackgroundTasks.BGTaskScheduler.Submit(BGTaskRequest taskRequest, NSError& error) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/build/dotnet/ios/generated-sources/BackgroundTasks/BGTaskScheduler.g.cs:line 175
   at Shiny.Jobs.JobManager.RegisterNative(JobInfo jobInfo)
   at Shiny.Jobs.AbstractJobManager.Register(JobInfo jobInfo)
   at Project.Core.BackgroundServices.TimeClock.TimeClockQueueMessagingService.Schedule() in /Users/me/Projects/Project/Core/Core/BackgroundServices/TimeClock/TimeClockQueueMessagingService.cs:line 53
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)
   at Foundation.NSAsyncSynchronizationContextDispatcher.Apply() in /Users/builder/azdo/_work/1/s/xamarin-macios/src/Foundation/NSAction.cs:line 176
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 58
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 94
   at Project.Program.Main(String[] args) in /Users/me/Projects/Project/Platforms/iOS/Program.cs:line 12

What I did wrong?
Thank you for your help and support.

Best regards

[aritchie]

Step 8 is where everything went downhill for you. Please use the application builder on shinylib.net and pick "periodic jobs". If will show you how to register a job. There is also AddJobs off the service collection if you need to dynamically register

[yaroslavyuzykCS]

Yes, I have used a builder https://shinylib.net/client/appbuilder/.
I removed:

builder.Services.AddSingleton<IRepository, FileSystemRepository>();
builder.Services.AddSingleton<IJobManager, JobManager>();

And now I got:

2024-06-18 17:04:51.315 Project[8717:4159595] System.InvalidOperationException: Unable to resolve service for type 'Shiny.Jobs.IJobManager' while attempting to activate 'Project.Core.BackgroundServices.TimeClock.TimeClockQueueMessagingService'.
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateArgumentCallSites(ServiceIdentifier serviceIdentifier, Type implementationType, CallSiteChain callSiteChain, ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateConstructorCallSite(ResultCache lifetime, ServiceIdentifier serviceIdentifier, Type implementationType, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateExact(ServiceDescriptor descriptor, ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain, Int32 slot)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateExact(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateCallSite(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.GetCallSite(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateArgumentCallSites(ServiceIdentifier serviceIdentifier, Type implementationType, CallSiteChain callSiteChain, ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateConstructorCallSite(ResultCache lifetime, ServiceIdentifier serviceIdentifier, Type implementationType, CallSiteChain callSiteChain)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateExact(ServiceDescriptor descriptor, ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain, Int32 slot)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateExact(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateCallSite(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.GetCallSite(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateArgumentCallSites(ServiceIdentifier serviceIdentifier, Type implementationType, CallSiteChain callSiteChain, ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateConstructorCallSite(ResultCache lifetime, ServiceIdentifier serviceIdentifier, Type implementationType, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateExact(ServiceDescriptor descriptor, ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain, Int32 slot)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateExact(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateCallSite(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.GetCallSite(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateArgumentCallSites(ServiceIdentifier serviceIdentifier, Type implementationType, CallSiteChain callSiteChain, ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateConstructorCallSite(ResultCache lifetime, ServiceIdentifier serviceIdentifier, Type implementationType, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateExact(ServiceDescriptor descriptor, ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain, Int32 slot)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.TryCreateExact(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateCallSite(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.GetCallSite(ServiceIdentifier serviceIdentifier, CallSiteChain callSiteChain)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(ServiceIdentifier serviceIdentifier)
2024-06-18 17:04:51.315 Project[8717:4159595]    at System.Collections.Concurrent.ConcurrentDictionary`2[[Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceIdentifier, Microsoft.Extensions.DependencyInjection, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60],[Microsoft.Extensions.DependencyInjection.ServiceProvider.ServiceAccessor, Microsoft.Extensions.DependencyInjection, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60]].GetOrAdd(ServiceIdentifier key, Func`2 valueFactory)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(ServiceIdentifier serviceIdentifier, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[IExtendedSplashScreenViewModel](IServiceProvider provider)
2024-06-18 17:04:51.315 Project[8717:4159595]    at Project.Navigation.NavigationHelper.CreateAndAddModel[IExtendedSplashScreenViewModel]() in /Users/me/Projects/Project/UI/Entities/Implementations/Navigation/NavigationHelper.cs:line 632
2024-06-18 17:04:57.415 Project[8717:4159595] 

@aritchie Sorry, not clear to me what I did wrong.

[aritchie]

On the service builder in MauiProgram.cs, use AddJob or AddJobs. You don't manually register the services, you use the extension method I created that puts in all of infrastructure necessary. It is shown in the app builder, so you've missed a step

[yaroslavyuzykCS]

Added Job:

builder.Services.AddJob(new JobInfo(nameof(TimeClockSyncJob), typeof(TimeClockSyncJob))
{
    BatteryNotLow = false,
    DeviceCharging = false,
    RequiredInternetAccess = InternetAccess.Any
});

And now I get:

Shiny.Jobs.IJobManager: Critical: Background tasks are not setup properly.

System.Exception: Could not register background processing job. Shiny uses background processing when enabled in your info.plist.  Please follow the Shiny readme for Shiny.Core to properly register BGTaskSchedulerPermittedIdentifiers
 ---> ObjCRuntime.ObjCException: Objective-C exception thrown.  Name: NSInternalInconsistencyException Reason: Launch handler for task with identifier com.shiny.job has already been registered
   at BackgroundTasks.BGTaskScheduler.Register(String identifier, DispatchQueue queue, Action`1 launchHandler) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/build/dotnet/ios/generated-sources/BackgroundTasks/BGTaskScheduler.g.cs:line 156
   at Shiny.Jobs.JobManager.Register(String identifier)
   at Shiny.Jobs.JobManager.ComponentStart()

[aritchie]

Please send a full reproducible sample then