AbstractPool (ActiveMQ Artemis Commons 2.27.1 API)

java.lang.Object
- org.apache.activemq.artemis.utils.AbstractPool<I,O>

Direct Known Subclasses:

SimpleString.StringSimpleStringPool
```
public abstract class AbstractPool<I,O>
extends Object
```
Thread-safe <T> interner.
Differently from String.intern() it contains a fixed amount of entries and when used by concurrent threads it doesn't ensure the uniqueness of the entries ie the same entry could be allocated multiple times by concurrent calls.

Field Summary

Fields
Modifier and Type Field Description

static int DEFAULT_POOL_CAPACITY

Constructor Summary

Constructors
Constructor Description

AbstractPool()

AbstractPool(int capacity)

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected abstract O`	`create(I value)`	Create a new entry.
`O`	`getOrCreate(I value)`	Returns and interned entry if possible, a new one otherwise.
`protected int`	`hashCode(I value)`
`protected abstract boolean`	`isEqual(O entry, I value)`	Returns `true` if the `entry` content is equal to `value`;

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

Field Detail
- DEFAULT_POOL_CAPACITY
```
public static final int DEFAULT_POOL_CAPACITY
```
  See Also:
  
  Constant Field Values

Constructor Detail

AbstractPool
```
public AbstractPool()
```

AbstractPool
```
public AbstractPool(int capacity)
```

Method Detail

create

protected abstract O create(I value)

Create a new entry.

isEqual

protected abstract boolean isEqual(O entry,
                                   I value)

Returns true if the entry content is equal to value;

hashCode
```
protected int hashCode(I value)
```

getOrCreate
```
public final O getOrCreate(I value)
```
Returns and interned entry if possible, a new one otherwise.
The byteBuf's ByteBuf.readerIndex() is incremented by length after it.