aef0665ddb
Today all search phases are inner classes of AbstractSearchAsyncAction or one of it's subclasses. This makes unit testing of these classes practically impossible. This commit Extracts `DfsQueryPhase` and `FetchSearchPhase` or of the code that composes the actual query execution types and moves most of the fan-out and collect code into an `InitialSearchPhase` class that can be used to build initial search phases (phases that retry on shards). This will make modification to these classes simpler and allows to easily compose or add new search phases down the road if additional roundtrips are required. |
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