CollectorManager (Lucene 9.10.0 core API)

All Known Implementing Classes:

MultiCollectorManager, TopFieldCollectorManager, TopScoreDocCollectorManager, TotalHitCountCollectorManager
```
public interface CollectorManager<C extends Collector,T>
```
A manager of collectors. This class is useful to parallelize execution of search requests and has two main methods:
- newCollector() which must return a NEW collector which will be used to collect a certain set of leaves.
- reduce(Collection) which will be used to reduce the results of individual collections into a meaningful result. This method is only called after all leaves have been fully collected.
See Also:

IndexSearcher.search(Query, CollectorManager)

WARNING: This API is experimental and might change in incompatible ways in the next release.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`C`	`newCollector()`	Return a new `Collector`.
`T`	`reduce(Collection<C> collectors)`	Reduce the results of individual collectors into a meaningful result.

- Method Detail
  - newCollector
```
C newCollector()
        throws IOException
```
    Return a new Collector. This must return a different instance on each call.
    
    Throws:
    
    IOException
  - reduce
```
T reduce(Collection<C> collectors)
  throws IOException
```
    Reduce the results of individual collectors into a meaningful result. For instance a TopDocsCollector would compute the top docs of each collector and then merge them using TopDocs.merge(int, TopDocs[]). This method must be called after collection is finished on all provided collectors.
    
    Throws:
    
    IOException