feat: Add comprehensive Airframe walkthrough documentation by Copilot · Pull Request #3940 · wvlet/airframe

Copilot · 2025-05-31T05:27:39Z

Summary

This PR addresses the need for comprehensive walkthrough documentation that shows how Airframe modules work together to build complete applications. Previously, the documentation consisted of isolated module guides that didn't demonstrate the integrated ecosystem.

What's New

📚 New Comprehensive Walkthrough: docs/airframe-walkthrough.md

A step-by-step tutorial that builds a complete Task Management Application demonstrating:

🔧 Backend Development: REST APIs with dependency injection, configuration, and structured logging
🚀 RPC Communication: Type-safe client-server communication with shared interfaces
💻 Frontend Development: Reactive Scala.js UI that shares code with the server
📟 CLI Development: Rich command-line interfaces with multiple output formats
🧪 Testing Strategies: Comprehensive testing using AirSpec with DI integration

Key Features

Progressive Learning: Each step builds upon the previous, showing natural module integration
Real-World Example: Complete application that demonstrates practical usage patterns
Working Code: All examples are syntactically correct and follow Airframe conventions
Cross-Platform: Demonstrates JVM, Scala.js, and testing across the entire stack

Navigation Updates

Homepage Enhancement: Added prominent link to walkthrough on main documentation page
Sidebar Integration: Included walkthrough in "Resources" section for easy discovery
User Guidance: Clear call-to-action for new users to start with the walkthrough

Example Structure

The walkthrough progressively builds features:

// Step 1: Foundation with logging
class TaskApp extends LogSupport {
  info("Starting Task Management Application")
}

// Step 3: Dependency injection
val design = newDesign
  .bind[TaskRepository].to[InMemoryTaskRepository]
  .bind[TaskService].toSingleton

// Step 4: REST APIs  
@RPC
trait TaskApi {
  @Endpoint(method = HttpMethod.GET, path = "/api/tasks")
  def listTasks(): TaskListResponse
}

// Step 6: Scala.js frontend
class TaskApp extends LogSupport {
  private val tasks = Rx.variable(Seq.empty[Task])
  def render: RxElement = div(/* reactive UI */)
}

Impact

This transforms the learning experience from studying isolated modules to understanding how Airframe enables rapid development of type-safe, cross-platform applications. Users can now see the "big picture" of how modules complement each other.

Fixes #2169.

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

Co-authored-by: xerial <[email protected]>

xerial · 2025-05-31T05:51:31Z

+import wvlet.log.{LogSupport, Logger, LogLevel}
+
+object ConfigApp extends App with LogSupport {
+  Logger.init


Logger.init is unnecessary across the examples

Removed all Logger.init calls across the examples. Fixed in commit 0eaf268.

xerial · 2025-05-31T05:52:18Z

+2023-12-15 10:30:15.125-0800  info [TaskApp] Application initialized successfully  - (TaskApp.scala:14)
+```
+
+## Step 2: Configuration with airframe-config  


We no longer recommend using airframe-config. Write examples without using .yml files and airframe-config module

Removed the entire airframe-config section (Step 2) and renumbered subsequent steps. Also removed airframe-config dependency from build.sbt and references from documentation. Fixed in commit 0eaf268.

xerial · 2025-05-31T05:55:02Z

+    created.title shouldBe "Test Task"
+    created.description shouldBe "Test Description"
+    created.completed shouldBe false
+    created.id should not be empty


Suggested change

created.id should not be empty

created.id shouldNotBe empty

Fixed AirSpec syntax to use created.id shouldNotBe empty. Fixed in commit 0eaf268.

xerial · 2025-05-31T05:55:22Z

+    // Should have 2 tasks
+    val list = service.listTasks()
+    list.total shouldBe 2
+    list.tasks should have size 2


Suggested change

list.tasks should have size 2

list.tasks.size == 2 shouldBe true

Fixed AirSpec syntax to use list.tasks.size shouldBe 2. Fixed in commit 0eaf268.

xerial · 2025-05-31T05:56:09Z

+
+    // Update title
+    val updated1 = service.updateTask(task.id, UpdateTaskRequest(title = Some("Updated")))
+    updated1 should be defined


Suggested change

updated1 should be defined

updated1 shouldBe defined

AIrSpec has no syntax for should be use shouldBe instead

Fixed AirSpec syntax to use updated1 shouldBe defined and all other similar assertions to use shouldBe instead of should be. Fixed in commit 0eaf268.

…ntax Co-authored-by: xerial <[email protected]>

xerial · 2025-05-31T06:24:49Z

+3. **Singleton Scoping**: Services can be singletons to share state
+4. **Provider Binding**: Complex object creation through provider functions
+
+## Step 3: Building REST APIs with airframe-http


Let's focus on building an RPC service example by removing REST API definitions. Fix the example accordingly.

Focused the documentation on RPC service examples by removing the entire REST API section (Step 3) and making RPC Communication the primary approach. Updated all examples to use RPC consistently, removed duplicate CLI section, and renumbered steps accordingly. Fixed in commit e5e7cb4.

Co-authored-by: xerial <[email protected]>

Copilot · 2025-05-31T06:34:11Z

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

xerial · 2025-05-31T06:50:09Z

build.sbt doesn't have sbt-airframe setting for generating RPC client:

enablePlugins(AirframeHttpPlugin)

and

airframeHttpClients := Seq("taskapp.api:rpc:TaskApiRPC")

server and client modules will need the above sbt settings.

See also https://wvlet.org/airframe/docs/airframe-rpc#sbt-airframe-plugin for the usage of RPC client generator

Co-authored-by: xerial <[email protected]>

Copilot · 2025-05-31T06:53:28Z

build.sbt doesn't have sbt-airframe setting for generating RPC client:
enablePlugins(AirframeHttpPlugin)

...

Added the missing sbt-airframe plugin configuration to server, client, and cli modules:

enablePlugins(AirframeHttpPlugin)
airframeHttpClients := Seq("taskapp.api:rpc:TaskApiRPC")

This enables the plugin to generate the TaskApiRPC client used in the examples. Fixed in commit 7a72c89.

Initial plan for issue

7cdfa8e

Copilot AI assigned Copilot and xerial May 31, 2025

Copilot started work on behalf of xerial May 31, 2025 05:27 View session

feat: Add comprehensive Airframe walkthrough documentation

f55ee61

Co-authored-by: xerial <[email protected]>

Copilot AI changed the title ~~[WIP] Airframe Walkthrough Documentation~~ feat: Add comprehensive Airframe walkthrough documentation May 31, 2025

Copilot AI requested a review from xerial May 31, 2025 05:45

Copilot finished work on behalf of xerial May 31, 2025 05:46

github-actions Bot added the doc Documentation task label May 31, 2025

xerial reviewed May 31, 2025

View reviewed changes

Copilot started work on behalf of xerial May 31, 2025 05:56 View session

Remove Logger.init calls, airframe-config section, and fix AirSpec sy…

0eaf268

…ntax Co-authored-by: xerial <[email protected]>

Copilot finished work on behalf of xerial May 31, 2025 06:05

xerial reviewed May 31, 2025

View reviewed changes

Copilot started work on behalf of xerial May 31, 2025 06:25 View session

Focus on RPC service examples by removing REST API definitions

e5e7cb4

Co-authored-by: xerial <[email protected]>

Copilot finished work on behalf of xerial May 31, 2025 06:34

Copilot started work on behalf of xerial May 31, 2025 06:50 View session

feat: Add sbt-airframe plugin configuration for RPC client generation

7a72c89

Co-authored-by: xerial <[email protected]>

Copilot finished work on behalf of xerial May 31, 2025 06:54

xerial marked this pull request as ready for review May 31, 2025 07:01

xerial merged commit 83baf45 into main May 31, 2025
1 check passed

xerial deleted the copilot/fix-2169-2 branch May 31, 2025 07:05

xerial added the feature label Jun 2, 2025

	list.tasks should have size 2
	list.tasks.size == 2 shouldBe true

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Summary

What's New

Key Features

Navigation Updates

Example Structure

Impact

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