fix(apollo): fix l2 cache config and add waitUntil support

[adambenhassen]

Description

Fixes Apollo Server integration for L2 cache:

• Fix non-null assertion bug where persistedDocumentsCache! could crash if user provides layer2Cache but ctx.cache is undefined
• Add waitUntil propagation from context

[gemini-code-assist]

Summary of Changes

Hello @adambenhassen, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the stability and functionality of Apollo Server's integration with Layer 2 (L2) persisted document caching. It addresses a critical bug in the cache configuration that could lead to crashes and introduces waitUntil support, which is vital for ensuring proper asynchronous operation completion in serverless environments. These changes collectively improve the robustness and performance of GraphQL Hive's Apollo plugin.

Highlights

• L2 Cache Configuration Fix: Resolved a potential runtime error in Apollo Server's Layer 2 (L2) cache integration. Previously, a non-null assertion could cause a crash if persistedDocumentsCache was provided but the underlying context cache was undefined. The configuration logic has been refactored to handle this gracefully.
• WaitUntil Support: Added support for waitUntil propagation from the Apollo context. This enhancement is crucial for serverless environments, allowing asynchronous operations (like cache writes) to complete before the serverless function's execution context is frozen, improving reliability and data consistency.

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[gemini-code-assist]

Code Review

This pull request correctly fixes a non-null assertion bug in the L2 cache configuration for Apollo and adds support for waitUntil propagation from the context. The changes are well-implemented. I have one suggestion to simplify the logic for setting the layer2Cache, making it more direct and readable.

[github-actions]

🚀 Snapshot Release (alpha)

The latest changes of this PR are available as alpha on npm (based on the declared changesets):

Package	Version	Info
@graphql-hive/apollo	0.47.0-alpha-20260107122401-47a7c87bdb6c6bfe5d80ea4b8ce0c165adc0f0df	npm ↗︎ unpkg ↗︎
@graphql-hive/cli	0.57.1-alpha-20260107122401-47a7c87bdb6c6bfe5d80ea4b8ce0c165adc0f0df	npm ↗︎ unpkg ↗︎
@graphql-hive/core	0.20.0-alpha-20260107122401-47a7c87bdb6c6bfe5d80ea4b8ce0c165adc0f0df	npm ↗︎ unpkg ↗︎
@graphql-hive/envelop	0.40.2-alpha-20260107122401-47a7c87bdb6c6bfe5d80ea4b8ce0c165adc0f0df	npm ↗︎ unpkg ↗︎
@graphql-hive/yoga	0.47.0-alpha-20260107122401-47a7c87bdb6c6bfe5d80ea4b8ce0c165adc0f0df	npm ↗︎ unpkg ↗︎

[github-actions]

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[github-actions]

💻 Website Preview

The latest changes are available as preview in: https://pr-7462.hive-landing-page.pages.dev

[github-actions]

🐋 This PR was built and pushed to the following Docker images:

Targets: build

Platforms: linux/amd64

Image Tag: 47a7c87bdb6c6bfe5d80ea4b8ce0c165adc0f0df