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Drupal course - batch API
Batch API allows processing jobs in batches to avoid PHP timeouts and provide feedback to users. It spreads work over multiple page requests. Key functions include batch_get(), batch_process(), and batch_set(). It works by setting a batch operation, executing it outside a form submit handler, updating context values in each step, and checking when steps are finished. The cron queue similarly processes large amounts of data from cron jobs by defining a queue in hook_cron_queue_info(), loading items in hook_cron(), and processing individual items with a worker callback.
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Drupal course - batch API
- 1. Batch API DánielKalmár March 28, 2013
- 2. What is batchAPI?
- 3. What is batchAPI? ● Batch (execution of a series of “jobs”) ● Application Programming Interface ● Avoid PHP timeout ● Spread out the processing over several page requests ● Feedback for users (progress bar) ● Cannot use in cron jobs
- 4. When can batchAPI be useful? ● designed to integrate with the Form API workflow ● can be used by non-Form API scripts (update, page callbacks) ● site install (module install) ● bulk operations (nodes, users) ● search API (indexing)
- 5. Functions ● batch_get() ● batch_process() ● batch_set() ● hook_batch_alter() ● _batch_populate_queue() ● _batch_queue()
- 6. How does itwork?
- 7.
- 8. Process ● set batch operation ● execute batch operation (only need outside of a form submit handler)
- 9. Operations ● $context ● Set the starting values
- 10. Operations ● update the values in each steps
- 11. Operations ● check if all the steps have been executed
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- 15. What is cronqueue? ● cron ● hooks ● queue API ● limit the processing time of a queue per cron run
- 16. When can cronqueue be useful? ● processing large amounts of data in cron ● bulk operations (nodes, users) ● regular newsletter sending
- 17. How does itwork?
- 18. Define a queue ● Implement hook_cron_queue_info()
- 19. Load the queue ● Loading items in the queue in hook_cron()
- 20. Process a queueitem ● worker callback deals with the individual queue items
- 21.