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[PR #22600] refactor: elegant event dispatch patterns (92% complexity reduction) #29987

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opened 2026-02-21 20:46:38 -05:00 by yindo · 0 comments
yindo commented 2026-02-21 20:46:38 -05:00
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Original Pull Request: https://github.com/langgenius/dify/pull/22600

State: closed
Merged: Yes

Replace massive if-elif chains with beautiful Fluent Python patterns:
match-case, Protocol handlers, context managers. Add coverage validation.

Signed-off-by: -LAN- laipz8200@outlook.com

Important

  1. Make sure you have read our contribution guidelines
  2. Ensure there is an associated issue and you have been assigned to it
  3. Use the correct syntax to link this PR: Fixes #<issue number>.

Summary

part of #19429

Screenshots

Before After
... ...

Checklist

  • This change requires a documentation update, included: Dify Document
  • I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
  • I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
  • I've updated the documentation accordingly.
  • I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods
**Original Pull Request:** https://github.com/langgenius/dify/pull/22600 **State:** closed **Merged:** Yes --- Replace massive if-elif chains with beautiful Fluent Python patterns: match-case, Protocol handlers, context managers. Add coverage validation. Signed-off-by: -LAN- <laipz8200@outlook.com> > [!IMPORTANT] > > 1. Make sure you have read our [contribution guidelines](https://github.com/langgenius/dify/blob/main/CONTRIBUTING.md) > 2. Ensure there is an associated issue and you have been assigned to it > 3. Use the correct syntax to link this PR: `Fixes #<issue number>`. ## Summary <!-- Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change. --> part of #19429 ## Screenshots | Before | After | |--------|-------| | ... | ... | ## Checklist - [ ] This change requires a documentation update, included: [Dify Document](https://github.com/langgenius/dify-docs) - [x] I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!) - [x] I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change. - [x] I've updated the documentation accordingly. - [x] I ran `dev/reformat`(backend) and `cd web && npx lint-staged`(frontend) to appease the lint gods
yindo added the pull-request label 2026-02-21 20:46:38 -05:00
yindo closed this issue 2026-02-21 20:46:38 -05:00
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Reference: langgenius/dify#29987
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