public async Task RequestVMAsync(string vmId, object vmArg)
{
object data = NormalizeType(vmArg);
try
{
_callerContext = Context;
_hubContext = new DotNetifyHubContext(_callerContext, nameof(IDotNetifyHubMethod.Request_VM), vmId, data, null, Principal);
await _hubPipeline.RunMiddlewaresAsync(_hubContext, async ctx =>
{
Principal = ctx.Principal;
string groupName = await VMController.OnRequestVMAsync(Context.ConnectionId, ctx.VMId, ctx.Data);
// A multicast view model may be assigned to a SignalR group. If so, add the connection to the group.
if (!string.IsNullOrEmpty(groupName))
{
await _globalHubContext.Groups.AddToGroupAsync(Context.ConnectionId, groupName);
}
});
}
catch (Exception ex)
{
var finalEx = await _hubPipeline.RunExceptionMiddlewareAsync(Context, ex);
if (finalEx is OperationCanceledException == false)
{
await ResponseVMAsync(Context.ConnectionId, vmId, SerializeException(finalEx));
}
}
}
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);
}
