commit-once-in-proc-save

[jasquat]

Hopefully fixes #1149

Commit the db at the end of the save method in ProcessInstanceProcessor. This will hopefully get rid of a potential race condition where in the instance is in one state and the human tasks have not caught up yet.

Summary by CodeRabbit

• Refactor
  • Optimized database commit operations in process handling to enhance performance and reliability.

[coderabbitai]

Walkthrough

Walkthrough

This update refines the process handling in the system by adjusting the db.session.commit() execution to occur once after all operations, enhancing the efficiency of database interactions. It aims to address issues related to task redirection and race conditions by ensuring that human tasks are correctly updated and saved in sequence with process instance updates.

Changes

File Path	Change Summary
.../services/process_instance_processor.py	Moved db.session.commit() outside the loop; adjusted indentation for setting completed status of human tasks.

Assessment against linked issues

Objective	Addressed	Explanation
Identify and resolve redirection issue (#1149)	✅
Include task key in API response (#1149)	❌	No direct evidence of changes affecting API response structure.
Address race condition in celery processing (#1149)	✅	Moving db.session.commit() could mitigate race conditions by ensuring atomic updates.
Improve handling of "user_input_required" status (#1149)	❓	Specific handling of "user_input_required" status is not detailed, unclear if addressed.
Enhance sequencing of updating instances and saving tasks (#1149)	✅	Adjusting the commit point should improve the sequence and integrity of updates and task savings.

Thank you for using CodeRabbit. We offer it for free to the OSS community and would appreciate your support in helping us grow. If you find it useful, would you consider giving us a shout-out on your favorite social media?

Share

• X
• Mastodon
• Reddit
• LinkedIn

---

Tips

Chat

There are 3 ways to chat with CodeRabbit:

• Review comments: Directly reply to a review comment made by CodeRabbit. Example:
  • I pushed a fix in commit <commit_id>.
  • Generate unit-tests for this file.
• Files and specific lines of code (under the "Files changed" tab): Tag @coderabbitai in a new review comment at the desired location with your query. Examples:
  • @coderabbitai generate unit tests for this file.
  • @coderabbitai modularize this function.
• PR comments: Tag @coderabbitai in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
  • @coderabbitai generate interesting stats about this repository and render them as a table.
  • @coderabbitai show all the console.log statements in this repository.
  • @coderabbitai read src/utils.ts and generate unit tests.
  • @coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.

Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments.

CodeRabbit Commands (invoked as PR comments)

• @coderabbitai pause to pause the reviews on a PR.
• @coderabbitai resume to resume the paused reviews.
• @coderabbitai review to trigger a review. This is useful when automatic reviews are disabled for the repository.
• @coderabbitai resolve resolve all the CodeRabbit review comments.
• @coderabbitai help to get help.

Additionally, you can add @coderabbitai ignore anywhere in the PR description to prevent this PR from being reviewed.

CodeRabbit Configration File (.coderabbit.yaml)

• You can programmatically configure CodeRabbit by adding a .coderabbit.yaml file to the root of your repository.
• The JSON schema for the configuration file is available here.
• If your editor has YAML language server enabled, you can add the path at the top of this file to enable auto-completion and validation: # yaml-language-server: $schema=https://coderabbit.ai/integrations/coderabbit-overrides.v2.json

CodeRabbit Discord Community

Join our Discord Community to get help, request features, and share feedback.

[coderabbitai]

Review Status

Actionable comments generated: 2

Configuration used: .coderabbit.yaml

Commits

Files that changed from the base of the PR and between a71af6e and c0d9223.

Files selected for processing (1)

• spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py (2 hunks)

Additional comments: 1

spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py (1)

• 1142-1142: Moving the db.session.commit() call to the end of the save method is a good approach to address the race condition issue by ensuring that the database commit happens once after all tasks are processed. This change should help in synchronizing the update of process instances with the saving of human tasks, as intended by the PR objectives. However, it's crucial to verify this change does not introduce any unintended side effects, such as incomplete task processing or errors not being handled correctly.