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Implement connection lifecycle hooks#71

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leynos merged 2 commits intomainfrom
codex/add-connection-lifecycle-hooks
Jun 18, 2025
Merged

Implement connection lifecycle hooks#71
leynos merged 2 commits intomainfrom
codex/add-connection-lifecycle-hooks

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@leynos leynos commented Jun 18, 2025

Summary

  • add on_connection_setup and on_connection_teardown to WireframeApp
  • expose connection state to setup and teardown callbacks
  • update design docs with lifecycle hooks
  • mark lifecycle hooks item complete on roadmap
  • test setup and teardown hooks
  • add unhappy path tests

Testing

  • cargo clippy -- -D warnings
  • RUSTFLAGS="-D warnings" cargo test
  • mdformat-all
  • markdownlint --fix

https://chatgpt.com/codex/tasks/task_e_685298a3ccf08322854ccf21ec5e7ac7

Summary by Sourcery

Implement connection lifecycle hooks in WireframeApp to support asynchronous setup and teardown with per-connection state

New Features:

  • Add on_connection_setup and on_connection_teardown callbacks to WireframeApp for managing per-connection state

Enhancements:

  • Propagate asynchronous connection state through handle_connection to invoke setup and teardown hooks

Documentation:

  • Update design documentation to describe the new lifecycle hooks and mark the roadmap item as complete

Tests:

  • Add tests for setup and teardown callbacks, including scenarios without matching hooks

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📥 Commits

Reviewing files that changed from the base of the PR and between d04def9 and 14e9310.

📒 Files selected for processing (4)
  • docs/roadmap.md (1 hunks)
  • docs/rust-binary-router-library-design.md (1 hunks)
  • src/app.rs (9 hunks)
  • tests/lifecycle.rs (1 hunks)
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sourcery-ai Bot commented Jun 18, 2025

Reviewer's Guide

This PR enhances WireframeApp by introducing per-connection lifecycle hooks: it generalizes the app to track connection-specific state, provides builder methods to register async setup and teardown callbacks, invokes these hooks in the connection handler, and updates documentation and tests accordingly.

Sequence diagram for connection lifecycle with setup and teardown hooks

sequenceDiagram
    participant Client
    participant WireframeApp
    participant SetupCallback as on_connect
    participant TeardownCallback as on_disconnect
    Note over Client,WireframeApp: New connection established
    Client->>WireframeApp: Initiate connection
    alt on_connect is registered
        WireframeApp->>SetupCallback: Call on_connect()
        SetupCallback-->>WireframeApp: Return connection state (C)
    else on_connect not registered
        WireframeApp-->>WireframeApp: No connection state
    end
    Note over Client,WireframeApp: ...connection handled...
    Note over Client,WireframeApp: Connection closing
    alt on_disconnect is registered and state exists
        WireframeApp->>TeardownCallback: Call on_disconnect(state)
        TeardownCallback-->>WireframeApp: Complete
    else on_disconnect not registered or no state
        WireframeApp-->>WireframeApp: No teardown
    end
Loading

File-Level Changes

Change Details Files
Extend WireframeApp with generic state tracking and hook fields
  • Add a new generic parameter C to WireframeApp for connection state
  • Introduce on_connect and on_disconnect optional fields of async callbacks
  • Adjust Default, new, and serializer impls to initialize and carry hook fields
src/app.rs
Add builder methods for connection setup and teardown
  • Implement on_connection_setup to register an async callback returning C
  • Implement on_connection_teardown to register an async callback consuming C
  • Use Result return type for consistency with other builder methods
src/app.rs
Invoke lifecycle hooks in handle_connection
  • Call on_connect at the start of handle_connection and store returned state
  • After processing, call on_disconnect if both hook and state are present
  • Wrap state usage in Option to handle missing hooks gracefully
src/app.rs
Update design documentation and roadmap for lifecycle hooks
  • Document on_connection_setup and on_connection_teardown in design spec
  • Mark connection lifecycle hooks item complete in roadmap
docs/rust-binary-router-library-design.md
docs/roadmap.md
Add tests for setup and teardown behavior
  • Test that both setup and teardown callbacks run in happy path
  • Test that setup-only path runs without error
  • Test that teardown-only path does not run without setup
tests/lifecycle.rs

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Hey @leynos - I've reviewed your changes and they look great!

Prompt for AI Agents
Please address the comments from this code review:
## Individual Comments

### Comment 1
<location> `src/app.rs:175` </location>
<code_context>
+    ///
+    /// This function always succeeds currently but uses [`Result`] for
+    /// consistency with other builder methods.
+    pub fn on_connection_setup<F, Fut, C2>(self, f: F) -> Result<WireframeApp<S, C2>>
+    where
+        F: Fn() -> Fut + Send + Sync + 'static,
</code_context>

<issue_to_address>
on_connection_setup replaces the connection state type, which may be surprising in a builder chain.

Document that on_connection_setup changes the connection state type parameter, or consider making this type transition more explicit in the API.
</issue_to_address>

<suggested_fix>
<<<<<<< SEARCH
    /// Register a callback invoked when a new connection is established.
    ///
    /// The callback can perform authentication or other setup tasks and
    /// returns connection-specific state stored for the connection's
    /// lifetime.
    ///
    /// # Errors
    ///
    /// This function always succeeds currently but uses [`Result`] for
    /// consistency with other builder methods.
    pub fn on_connection_setup<F, Fut, C2>(self, f: F) -> Result<WireframeApp<S, C2>>
=======
    /// Register a callback invoked when a new connection is established.
    ///
    /// The callback can perform authentication or other setup tasks and
    /// returns connection-specific state stored for the connection's
    /// lifetime.
    ///
    /// # Type Parameters
    ///
    /// This method changes the connection state type parameter from `C` to `C2`.
    /// This means that any subsequent builder methods will operate on the new connection state type `C2`.
    /// Be aware of this type transition when chaining builder methods.
    ///
    /// # Errors
    ///
    /// This function always succeeds currently but uses [`Result`] for
    /// consistency with other builder methods.
    pub fn on_connection_setup<F, Fut, C2>(self, f: F) -> Result<WireframeApp<S, C2>>
>>>>>>> REPLACE

</suggested_fix>

### Comment 2
<location> `src/app.rs:26` </location>
<code_context>
 /// without enforcing an ordering. Methods return [`Result<Self>`] so
 /// registrations can be chained ergonomically.
-pub struct WireframeApp<S: Serializer = BincodeSerializer> {
+#[allow(clippy::type_complexity)]
+pub struct WireframeApp<S: Serializer = BincodeSerializer, C: Send + 'static = ()> {
     routes: HashMap<u32, Service>,
</code_context>

<issue_to_address>
Function attribute is placed before the doc comment; attributes must come after the doc comment.

Please move the #[allow(clippy::type_complexity)] attribute below the doc comment for the struct, as per the style guide.
</issue_to_address>

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Comment thread src/app.rs
Comment thread src/app.rs
/// without enforcing an ordering. Methods return [`Result<Self>`] so
/// registrations can be chained ergonomically.
pub struct WireframeApp<S: Serializer = BincodeSerializer> {
#[allow(clippy::type_complexity)]
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issue (review_instructions): Function attribute is placed before the doc comment; attributes must come after the doc comment.

Please move the #[allow(clippy::type_complexity)] attribute below the doc comment for the struct, as per the style guide.

Review instructions:

Path patterns: **/*.rs

Instructions:
Ensure that function attributes are placed AFTER the function doc comment

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>
@leynos leynos merged commit 3f43136 into main Jun 18, 2025
3 of 4 checks passed
@leynos leynos deleted the codex/add-connection-lifecycle-hooks branch June 18, 2025 13:35
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