TotalHitCountCollectorManager (Lucene 9.10.0 core API)

java.lang.Object
- org.apache.lucene.search.TotalHitCountCollectorManager

All Implemented Interfaces:

CollectorManager<TotalHitCountCollector,Integer>
```
public class TotalHitCountCollectorManager
extends Object
implements CollectorManager<TotalHitCountCollector,Integer>
```
Collector manager based on TotalHitCountCollector that allows users to parallelize counting the number of hits, expected to be used mostly wrapped in MultiCollectorManager. For cases when this is the only collector manager used, IndexSearcher.count(Query) should be called instead of IndexSearcher.search(Query, CollectorManager) as the former is faster whenever the count can be returned directly from the index statistics.

Constructor Summary

Constructors
Constructor Description

TotalHitCountCollectorManager()

Method Summary

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

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - TotalHitCountCollectorManager
```
public TotalHitCountCollectorManager()
```
- Method Detail
  - newCollector
```
public TotalHitCountCollector newCollector()
                                    throws IOException
```
    Description copied from interface: CollectorManager
    
    Return a new Collector. This must return a different instance on each call.
    
    Specified by:
    
    newCollector in interface CollectorManager<TotalHitCountCollector,Integer>
    
    Throws:
    
    IOException
  - reduce
```
public Integer reduce(Collection<TotalHitCountCollector> collectors)
               throws IOException
```
    Description copied from interface: CollectorManager
    
    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.
    
    Specified by:
    
    reduce in interface CollectorManager<TotalHitCountCollector,Integer>
    
    Throws:
    
    IOException