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Document the queue item's marshaling behavior (#27271)

Close #26843
wxiaoguang 2023-09-26 13:58:57 +08:00 committed by GitHub
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@ -9,6 +9,8 @@
// - An item can be a simple value, such as an integer, or a more complex structure that has multiple fields.
// Usually a item serves as a task or a message. Sets of items will be sent to a queue handler to be processed.
// - It's represented as a JSON-marshaled binary slice in the queue
// - Since the item is marshaled by JSON, and JSON doesn't have stable key-order/type support,
// so the decoded handler item may not be the same as the original "pushed" one if you use map/any types,
// 2. Batch:
// - A collection of items that are grouped together for processing. Each worker receives a batch of items.