Just as the title described, I want to define a callback/hook that can be invoked when a document is updated.
What i want is to get the document data before and after updated.I did some investigation and i think maybe i can do it through the elastic plugin, would IndexingOperationListener be my answer?If it would be, can anybody tell me where to find the implementation of update so I can determine which callback method should I override
/**
* Called before the indexing occurs.
*/
public Engine.Create preCreate(Engine.Create create)
//...
