Run the application

Start the Workflow

First, make sure the local Temporal Service is running. Open a new terminal window and run:

temporal server start-dev

To start the Workflow, run the following command:

dotnet run --project MoneyTransferClient

This command runs the Program.cs file within the MoneyTransferClient project, starting the Workflow process. The Workflow is now running. Leave the program running.

View the state of the Workflow in the Web UI

Visit the Temporal Web UI where you'll see your Workflow listed.

Click the Workflow ID. You can see everything about the execution: inputs, timeouts, scheduled retries, attempts, stack traces, and more:

Click Input and Results to see the inputs:

The Workflow hasn't executed yet - no Workers are connected to the Task Queue. You'll start the Worker next.

Start the Worker

A Worker:

• can only execute Workflows and Activities registered to it.
• knows which piece of code to execute based on Tasks from the Task Queue.
• only listens to the Task Queue that it's registered to.

Open a new terminal window and run the Worker:

dotnet run --project MoneyTransferWorker

The Worker connects to the Temporal Cluster, specifies the Task Queue, and registers the Workflow and Activities:

using Temporalio.Client;
using Temporalio.Worker;
using Temporalio.MoneyTransferProject.MoneyTransferWorker;

var client = await TemporalClient.ConnectAsync(new("localhost:7233"));

using var tokenSource = new CancellationTokenSource();
Console.CancelKeyPress += (_, eventArgs) =>
{
    tokenSource.Cancel();
    eventArgs.Cancel = true;
};

var activities = new BankingActivities();

using var worker = new TemporalWorker(
    client,
    new TemporalWorkerOptions(taskQueue: "MONEY_TRANSFER_TASK_QUEUE")
        .AddAllActivities(activities)
        .AddWorkflow<MoneyTransferWorkflow>()
);

Console.WriteLine("Running worker...");
try
{
    await worker.ExecuteAsync(tokenSource.Token);
}
catch (OperationCanceledException)
{
    Console.WriteLine("Worker cancelled");
}

When the Worker starts, it begins polling the Task Queue:

Running worker...
Withdrawing $400 from account 85-150.
Depositing $400 into account 43-812.

Check the Web UI again. You'll see one Worker registered, and the Workflow status shows completed:

You just ran a Temporal Workflow application and saw how Workflows, Activities, and Workers interact. Next you'll explore how Temporal handles failures.