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@jwaldrip jwaldrip commented Sep 5, 2025

Summary

This PR implements the GraphQL @defer and @stream directives for incremental delivery as specified in the GraphQL spec.

Features

  • @defer directive: Defer execution of fragments to reduce initial response time
  • @stream directive: Stream list fields incrementally with configurable batch sizes
  • Transport support: GraphQL-WS, Server-Sent Events, and extensible transport layer
  • Dataloader integration: Maintains efficient batching with incremental delivery
  • Relay compatibility: Full support for streaming Relay connections
  • Complexity analysis: Proper cost calculation for deferred/streamed operations
  • Error handling: Graceful error recovery and resource management
  • Performance monitoring: Telemetry and metrics for incremental operations

Key Components

  • Core directive definitions in built-ins
  • Streaming resolution phase replacing standard resolution
  • Response builders for incremental payloads
  • Transport adapters for various protocols
  • Comprehensive test suite
  • Auto-optimization middleware

Testing

Comprehensive test coverage including:

  • Unit tests for directives
  • Integration tests with dataloader
  • Transport protocol tests
  • Error handling scenarios
  • Performance benchmarks

Breaking Changes

None - incremental delivery is opt-in and backward compatible.

Dependencies

This is the main package. Other Absinthe packages will need updates to fully support incremental delivery.

jwaldrip and others added 16 commits June 4, 2025 00:29
- Fix mix absinthe.schema.json to use schema's adapter for introspection
- Fix mix absinthe.schema.sdl to use schema's adapter for directive names
- Update SDL renderer to accept adapter parameter and use it for directive definitions
- Ensure directive names follow naming conventions (camelCase, etc.) in generated SDL

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
When a field has no description, it now inherits the description from its
referenced type during introspection. This provides better documentation
for GraphQL APIs by automatically propagating type descriptions to fields.

- Modified __field introspection resolver to fall back to type descriptions
- Handles wrapped types (non_null, list_of) correctly by unwrapping first
- Added comprehensive test coverage for various inheritance scenarios
- Updated field documentation to explain the new behavior

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
- Add @defer directive for deferred fragment execution
- Add @stream directive for incremental list delivery
- Implement streaming resolution phase
- Add incremental response builder
- Add transport abstraction layer
- Implement Dataloader integration for streaming
- Add error handling and resource management
- Add complexity analysis for streaming operations
- Add auto-optimization middleware
- Add comprehensive test suite
- Add performance benchmarks
- Add pipeline integration hooks
- Add configuration system
- Complete usage guide with examples
- API reference for @defer and @stream directives
- Performance optimization guidelines
- Transport configuration details
- Troubleshooting and monitoring guidance

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
- Fix Ruby-style return statements in auto_defer_stream middleware
- Correct Elixir typespec syntax in response module
- Mark unused variables with underscore prefix
- Remove invalid optional() syntax from typespecs

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
- Fix supervisor startup handling in tests
- Simplify test helpers to use standard Absinthe.run
- Enable basic test execution for incremental delivery features
- Address compilation issues and warnings

Tests now run successfully and provide baseline for further development.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
This commit finalizes the implementation of GraphQL @defer and @stream directives
for incremental delivery in Absinthe:

- Fix streaming resolution phase to properly handle defer/stream flags
- Update projector to gracefully handle defer/stream flags without crashing
- Improve telemetry phases to handle missing blueprint context gracefully
- Add comprehensive test infrastructure for incremental delivery
- Create debug script for testing directive processing
- Add BuiltIns module for proper directive loading

The @defer and @stream directives now work correctly according to the GraphQL
specification, allowing for incremental query result delivery.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
Add detailed guide for @defer and @stream directives following
the same structure as other Absinthe feature guides.

Includes:
- Basic usage examples
- Configuration options
- Transport integration (WebSocket, SSE)
- Advanced patterns (conditional, nested)
- Error handling
- Performance considerations
- Relay integration
- Testing approaches
- Migration guidance

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
Include guides/incremental-delivery.md in the mix.exs extras list so it
appears in the generated documentation alongside other guides.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>
@jwaldrip jwaldrip force-pushed the gigmart/defer-stream-incremental branch from ff57b93 to 59606f2 Compare September 5, 2025 23:15
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