ArraySearcherPool (Apache HBase 1.2.12 API)

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java.lang.Object
- org.apache.hadoop.hbase.codec.prefixtree.decode.ArraySearcherPool

```
@InterfaceAudience.Private
public class ArraySearcherPool
extends Object
```
Pools PrefixTreeArraySearcher objects. Each Searcher can consist of hundreds or thousands of objects and 1 is needed for each HFile during a Get operation. With tens of thousands of Gets/second, reusing these searchers may save a lot of young gen collections.
Alternative implementation would be a ByteBufferSearcherPool (not implemented yet).

Field Summary

Fields
Modifier and Type	Field and Description
`private static Integer`	`MAX_POOL_SIZE` One decoder is needed for each storefile for each Get operation so we may need hundreds at the same time, however, decoding is a CPU bound activity so should limit this to something in the realm of maximum reasonable active threads.
`protected Queue<PrefixTreeArraySearcher>`	`pool`

Constructor Summary

Constructors
Constructor and Description

ArraySearcherPool()

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`checkIn(PrefixTreeArraySearcher searcher)`
`PrefixTreeArraySearcher`	`checkOut(ByteBuffer buffer, boolean includesMvccVersion)`
`String`	`toString()`

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

- Field Detail
  - MAX_POOL_SIZE
```
private static final Integer MAX_POOL_SIZE
```
    One decoder is needed for each storefile for each Get operation so we may need hundreds at the same time, however, decoding is a CPU bound activity so should limit this to something in the realm of maximum reasonable active threads.
  - pool
```
protected Queue<PrefixTreeArraySearcher> pool
```
- Constructor Detail
  - ArraySearcherPool
```
public ArraySearcherPool()
```
- Method Detail
  - checkOut
```
public PrefixTreeArraySearcher checkOut(ByteBuffer buffer,
                               boolean includesMvccVersion)
```
  - checkIn
```
public void checkIn(PrefixTreeArraySearcher searcher)
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

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