Document RabbitMQ auto activation feature

[Copilot]

RabbitMQ client connections in Aspire 9.5 support auto activation to prevent startup deadlocks, but the feature was undocumented.

Changes

RabbitMQ Integration Documentation

• Added "Auto activation" section in client integration area explaining:
  • Feature purpose: prevents startup deadlocks by establishing connections at startup vs. lazy initialization
  • Configuration: DisableAutoActivation = false to enable (disabled by default)
  • Use cases: early connectivity verification, fail-fast scenarios, pre-traffic connection requirements
  • Future: planned to be enabled by default in upcoming release

What's New in Aspire 9.5

• Enhanced existing RabbitMQ auto activation section with:
  • Detailed explanation of lazy vs. eager connection initialization
  • Structured scenarios list
  • Cross-reference link to integration documentation

Example

var builder = WebApplication.CreateBuilder(args);

// Enable auto activation to establish connection during startup
builder.AddRabbitMQClient("messaging", o => o.DisableAutoActivation = false);

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/CommunityToolkit/Aspire
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/CommunityToolkit/Aspire/contributors
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• https://api.github.com/repos/dotnet/aspire
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/dotnet/aspire-samples
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/dotnet/aspire-samples/contributors
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• https://api.github.com/repos/dotnet/aspire/contributors
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• https://api.github.com/repos/microsoft/aspire.dev
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/microsoft/aspire.dev/contributors
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• https://api.github.com/repos/microsoft/dcp
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node ./scripts/update-github-stats.js (http block)
• https://api.github.com/repos/microsoft/dcp/contributors
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• learn.microsoft.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (dns block)
• telemetry.astro.build
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (dns block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js dev git log %D �� %b �� %aN �� %aE ���� --follow 0/x64/lib/node_modules/pnpm/dist/node-gyp-bin/git ference/cli/commbash REDACTED extended git log %D �� %b �� %aN �� %aE ���� extended ire.dev/src/frontend/node_module--recurse-submodules=no 3-1.mdx --no-quiet /node-gyp-bin/gi. git (dns block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js dev git log %D �� %b �� %aN �� %aE ���� --follow (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[What's New Analysis] Add RabbitMQ auto activation to rabbitmq-integration</issue_title>
<issue_description>## Summary

RabbitMQ client connections now support auto activation (introduced in 9.5) to prevent startup deadlocks. This is not documented in rabbitmq-integration.

What's Missing

From what's-new-in-aspire-95:

var builder = WebApplication.CreateBuilder(args);

// Auto activation is disabled by default for RabbitMQ
// Enable using DisableAutoActivation=false
builder.AddRabbitMQClient("messaging", o => o.DisableAutoActivation = false);

Key Points

• Auto activation is disabled by default in 9.5
• Planned to be enabled by default in a future release
• Prevents startup deadlocks in certain scenarios

Suggested Content

Add to rabbitmq-integration doc, Client integration section:

1. Auto activation - what it does, why it exists
2. Configuration - DisableAutoActivation option
3. When to enable - scenarios where it helps
4. Default behavior changes - note future default change</issue_description>

<agent_instructions>please update this and the what's new too -
https://aspire.dev/integrations/messaging/rabbitmq/</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes [What's New Analysis] Add RabbitMQ auto activation to rabbitmq-integration #340

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