exercise1

Exercise 1: Hello Temporal (30 min)

Learning Objectives

• Understand Temporal Workflow and Activity concepts
• Learn how to register workflows and activities with a Worker
• Execute your first Temporal workflow

Key Concepts

Workflow

• Workflows orchestrate activities and contain business logic
• Must be deterministic and use Temporal SDK APIs
• Defined as exported async functions

Activity

• Activities handle external interactions (API calls, database operations, etc.)
• Can fail and be retried automatically
• Defined as regular async functions

Worker

• Polls task queues for work
• Executes workflow and activity code
• Must register workflow and activity implementations

Tasks

1. Complete the workflow implementation in src/workflow.ts
2. Complete the activity implementation in src/activities.ts
3. Complete the worker setup in src/worker/index.ts
4. Run the workflow

Running the Exercise

1. Start worker: npx ts-node exercise1/src/worker/index.ts
2. Execute workflow: npx ts-node exercise1/src/starter/index.ts
3. View workflow in Temporal UI: http://localhost:8233/namespaces/default/workflows

Expected Output

"Hello, Temporal!"