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Add a checkCancelled public method to ContextIndexSearcher #121349

@scampi

Description

@scampi

Description

The ContextIndexSearcher has some API to deal with cancelled tasks, see for example hasCancellations() below. Acting on cancelled tasks can be useful in ValueFetchers (which can be implemented by plugins via custom runtime fields), where resources can be released in such a case.
Although the method hasCancellations() is public and accessible to plugins, there is however no access point to its counterpart checkCancelled() (see below): that method would be needed to check if the search's task got cancelled (and act upon it).

  • Would it be possible to add a public access method to checkCancelled(), in order to allow plugins to handle cancellations in custom runtime fields ?
  • Related question: are IndexSearchers used in Elasticsearch all ContextIndexSearcher instances ?

public abstract ValueFetcher valueFetcher(SearchExecutionContext context, @Nullable String format);

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