Dapr v1.0: Building Microservices for Any Cloud

Dapr v1.0 is production-ready. It solves the hardest parts of distributed systems: State management, Service Invocation, and Event-driven messaging. This guide implements the “Virtual Actor” pattern using Dapr actors.

Virtual Actors

Actors are single-threaded units of state and logic. Dapr handles their lifetime (activating them when a message arrives, deactivating them after timeout).

public interface ISmartDevice : IActor
{
    Task SetDataAsync(DeviceData data);
    Task<DeviceData> GetDataAsync();
}

public class SmartDevice : Actor, ISmartDevice
{
    public async Task SetDataAsync(DeviceData data)
    {
        // State is saved to Redis/Cosmos automatically
        await this.StateManager.SetStateAsync("data", data);
    }
}

Output Bindings

Send emails or tweets without SDKs.

// component.yaml
spec:
  type: bindings.smtp
  metadata:
  - name: host
    value: smtp.grid.com

Key Takeaways

• Dapr v1.0 is stable for Kubernetes deployment.
• Actors are perfect for IoT and Gaming scenarios.
• mTLS is enabled by default between sidecars.