Batch Messenger

Batch Messenger is divided into three pieces of functionality:

• Group Symfony Messenger messages together into a collection. (Base functionality).
  Simply add a CollectionItem stamp with a shared ID.
• Expose a UI of progress of each collection. (Optional, enabled by default)
• Intercept Drupal Batch API calls (batch_set()) and replace with Messenger internals. (Optional, enabled by default)

This allows you to adopt Symfony Messenger, while providing a nice UI for the user. Performance of operations improve dramatically, as they may be worked in parallel, instead of single threaded. Message resources (CPU/memory, etc) can be increased in a worker, while granting the possibility to reduce web thread resources since they don't need to scale up for Batch API operations.

When the legacy Batch API is used (\batch_set), the UI is retained, and we provide status updates to the user despite operations not actually running in the web requests.

The module is a drop-in replacement for Batch API. If you encounter issues, uninstalling the module will return existing behavior. Though, any in-progress batches will be deleted.

More information can be found in the README.