public async Task <string> Request_VM(
string vmId,
[FromQuery] string vmArg,
[FromServices] IVMFactory vmFactory,
[FromServices] IHubServiceProvider hubServiceProvider,
[FromServices] IVMServiceScopeFactory serviceScopeFactory,
[FromServices] IHubPipeline hubPipeline,
[FromServices] IPrincipalAccessor principalAccessor
)
{
var taskCompletionSource = new TaskCompletionSource <string>(TaskCreationOptions.RunContinuationsAsynchronously);
Task responseVM(string arg1, string arg2, string arg3)
{
taskCompletionSource.TrySetResult(arg3);
return(Task.CompletedTask);
}
var vmController = new VMController(responseVM, vmFactory, serviceScopeFactory.CreateScope())
{
ResponseVMFilter = CreateRespondingVMFilter(hubPipeline, vmId, vmArg)
};
var httpCallerContext = InitializeContext(vmController, hubServiceProvider, principalAccessor);
var connectionId = httpCallerContext.ConnectionId;
try
{
var hubContext = new DotNetifyHubContext(httpCallerContext, nameof(Request_VM), vmId, vmArg, BuildHeaders(), httpCallerContext.User);
vmController.RequestVMFilter = CreateVMFilter(hubContext, hubPipeline);
await hubPipeline.RunMiddlewaresAsync(hubContext, async ctx =>
{
await vmController.OnRequestVMAsync(connectionId, ctx.VMId, ctx.Data);
vmController.Dispose();
});
}
catch (Exception ex)
{
var finalEx = await hubPipeline.RunExceptionMiddlewareAsync(httpCallerContext, ex);
if (finalEx is OperationCanceledException == false)
{
taskCompletionSource.TrySetResult(DotNetifyHub.SerializeException(finalEx));
}
}
return(await taskCompletionSource.Task);
}
/// <summary>
/// Creates a view model controller and assigns it a key.
/// On subsequent calls, use the same key to return the same object.
/// </summary>
/// <param name="key">Identifies the object.</param>
/// <returns>View model controller.</returns>
public VMController GetInstance(string key)
{
var cache = _controllersCache;
if (!cache.TryGetValue(key, out Lazy <VMController> cachedValue))
{
cachedValue = new Lazy <VMController>(() => new VMController(ResponseDelegate, _serviceScopeFactory.CreateScope()));
cache.Set(key, cachedValue, GetCacheEntryOptions());
}
return(cachedValue?.Value);
}
public async Task <string> Update_VM(
string vmId,
[FromQuery] string vmArg,
[FromBody] Dictionary <string, object> vmData,
[FromServices] IVMFactory vmFactory,
[FromServices] IHubServiceProvider hubServiceProvider,
[FromServices] IVMServiceScopeFactory serviceScopeFactory,
[FromServices] IHubPipeline hubPipeline,
[FromServices] IPrincipalAccessor principalAccessor)
{
var taskCompletionSource1 = new TaskCompletionSource <string>();
var taskCompletionSource2 = new TaskCompletionSource <string>();
var vmController = new VMController((arg1, arg2, arg3) =>
{
if (!taskCompletionSource1.TrySetResult(arg3))
{
taskCompletionSource2.TrySetResult(arg3);
}
}, vmFactory, serviceScopeFactory.CreateScope())
{
ResponseVMFilter = CreateRespondingVMFilter(hubPipeline, vmId, vmData)
};
var httpCallerContext = InitializeContext(vmController, hubServiceProvider, principalAccessor);
var connectionId = httpCallerContext.ConnectionId;
try
{
var hubContext = new DotNetifyHubContext(httpCallerContext, nameof(Request_VM), vmId, vmArg, BuildHeaders(), httpCallerContext.User);
vmController.RequestVMFilter = CreateVMFilter(hubContext, hubPipeline);
hubPipeline.RunMiddlewares(hubContext, ctx =>
{
vmController.OnRequestVM(connectionId, ctx.VMId, ctx.Data);
return(Task.CompletedTask);
});
}
catch (Exception ex)
{
var finalEx = hubPipeline.RunExceptionMiddleware(httpCallerContext, ex);
if (finalEx is OperationCanceledException == false)
{
taskCompletionSource1.TrySetResult(DotNetifyHub.SerializeException(finalEx));
}
}
await taskCompletionSource1.Task;
try
{
var hubContext = new DotNetifyHubContext(httpCallerContext, nameof(Update_VM), vmId, vmData, BuildHeaders(), httpCallerContext.User);
vmController.UpdateVMFilter = CreateVMFilter(hubContext, hubPipeline);
hubPipeline.RunMiddlewares(hubContext, ctx =>
{
vmController.OnUpdateVM(connectionId, ctx.VMId, ctx.Data as Dictionary <string, object>);
vmController.Dispose();
return(Task.CompletedTask);
});
}
catch (Exception ex)
{
var finalEx = hubPipeline.RunExceptionMiddleware(httpCallerContext, ex);
if (finalEx is OperationCanceledException == false)
{
taskCompletionSource2.TrySetResult(DotNetifyHub.SerializeException(finalEx));
}
}
return(await taskCompletionSource2.Task);
}
