java.lang.Object
- org.apache.lucene.search.Searcher
- - org.apache.lucene.search.MultiSearcher
  - - org.apache.lucene.search.ParallelMultiSearcher

All Implemented Interfaces:

Closeable, AutoCloseable, Searchable
```
@Deprecated
public class ParallelMultiSearcher
extends MultiSearcher
```
Deprecated.
Please pass an ExecutorService to IndexSearcher, instead.

Implements parallel search over a set of Searchables.
Applications usually need only call the inherited Searcher.search(Query,int) or Searcher.search(Query,Filter,int) methods.

Constructor Summary

Constructors
Constructor	Description
`ParallelMultiSearcher(ExecutorService executor, Searchable... searchables)`	Deprecated. Creates a `Searchable` which searches searchables with the specified ExecutorService.
`ParallelMultiSearcher(Searchable... searchables)`	Deprecated. Creates a `Searchable` which searches searchables with the default executor service (a cached thread pool).

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`void`	`close()`	Deprecated. Frees resources associated with this Searcher.
`int`	`docFreq(Term term)`	Deprecated. Executes each `Searchable`'s docFreq() in its own thread and waits for each search to complete and merge the results back together.
`TopDocs`	`search(Weight weight, Filter filter, int nDocs)`	Deprecated. A search implementation which executes each `Searchable` in its own thread and waits for each search to complete and merge the results back together.
`TopFieldDocs`	`search(Weight weight, Filter filter, int nDocs, Sort sort)`	Deprecated. A search implementation allowing sorting which spans a new thread for each Searchable, waits for each search to complete and merges the results back together.
`void`	`search(Weight weight, Filter filter, Collector collector)`	Deprecated. Lower-level search API.

Methods inherited from class org.apache.lucene.search.MultiSearcher
createNormalizedWeight, doc, doc, explain, getSearchables, getStarts, maxDoc, rewrite, subDoc, subSearcher

Methods inherited from class org.apache.lucene.search.Searcher
createWeight, docFreqs, explain, getSimilarity, search, search, search, search, search, search, setSimilarity

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

- Constructor Detail
  - ParallelMultiSearcher
```
public ParallelMultiSearcher(Searchable... searchables)
                      throws IOException
```
    Deprecated.
    
    Creates a Searchable which searches searchables with the default executor service (a cached thread pool).
    
    Throws:
    
    IOException
  - ParallelMultiSearcher
```
public ParallelMultiSearcher(ExecutorService executor,
                             Searchable... searchables)
                      throws IOException
```
    Deprecated.
    
    Creates a Searchable which searches searchables with the specified ExecutorService.
    
    Throws:
    
    IOException
- Method Detail
  - docFreq
```
public int docFreq(Term term)
            throws IOException
```
    Deprecated.
    
    Executes each Searchable's docFreq() in its own thread and waits for each search to complete and merge the results back together.
    
    Specified by:
    
    docFreq in interface Searchable
    
    Overrides:
    
    docFreq in class MultiSearcher
    
    Throws:
    
    IOException
    
    See Also:
    
    IndexReader.docFreq(Term)
  - search
```
public TopDocs search(Weight weight,
                      Filter filter,
                      int nDocs)
               throws IOException
```
    Deprecated.
    
    A search implementation which executes each Searchable in its own thread and waits for each search to complete and merge the results back together.
    
    Specified by:
    
    search in interface Searchable
    
    Overrides:
    
    search in class MultiSearcher
    
    Throws:
    
    IOException
  - search
```
public TopFieldDocs search(Weight weight,
                           Filter filter,
                           int nDocs,
                           Sort sort)
                    throws IOException
```
    Deprecated.
    
    A search implementation allowing sorting which spans a new thread for each Searchable, waits for each search to complete and merges the results back together.
    
    Specified by:
    
    search in interface Searchable
    
    Overrides:
    
    search in class MultiSearcher
    
    Throws:
    
    IOException
  - search
```
public void search(Weight weight,
                   Filter filter,
                   Collector collector)
            throws IOException
```
    Deprecated.
    
    Lower-level search API.
    Collector.collect(int) is called for every matching document.
    Applications should only use this if they need all of the matching documents. The high-level search API (Searcher.search(Query,int)) is usually more efficient, as it skips non-high-scoring hits.
    This method cannot be parallelized, because Collector supports no concurrent access.
    
    Specified by:
    
    search in interface Searchable
    
    Overrides:
    
    search in class MultiSearcher
    
    Parameters:
    
    weight - to match documents
    
    filter - if non-null, a bitset used to eliminate some documents
    
    collector - to receive hits
    
    Throws:
    
    IOException
  - close
```
public void close()
           throws IOException
```
    Deprecated.
    
    Description copied from interface: Searchable
    
    Frees resources associated with this Searcher. Be careful not to call this method while you are still using objects that reference this Searchable.
    
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface Searchable
    
    Overrides:
    
    close in class MultiSearcher
    
    Throws:
    
    IOException

Class ParallelMultiSearcher

Constructor Summary

Method Summary

Methods inherited from class org.apache.lucene.search.MultiSearcher

Methods inherited from class org.apache.lucene.search.Searcher

Methods inherited from class java.lang.Object

Constructor Detail

ParallelMultiSearcher

ParallelMultiSearcher

Method Detail

docFreq

search

search

search

close