ReferenceCountingResourceHolder (druid-processing 28.0.0 API)

java.lang.Object
- org.apache.druid.collections.ReferenceCountingResourceHolder<T>

All Implemented Interfaces:: Closeable, AutoCloseable, ResourceHolder<T>

public class ReferenceCountingResourceHolder<T>
extends Object
implements ResourceHolder<T>

Constructor Summary

Constructors
Constructor Description

ReferenceCountingResourceHolder(T object, Closeable closer)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`close()`	Decrements the reference count by 1.
`static <T extends Closeable> ReferenceCountingResourceHolder<T>`	`fromCloseable(T object)`
`T`	`get()`	Returns the resource with an initial reference count of 1.
`ResourceHolder<T>`	`increment()`	Increments the reference count by 1 and returns a `ResourceHolder` representing the new references.
`static long`	`leakedResources()`

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

- Constructor Detail
  - ReferenceCountingResourceHolder
```
public ReferenceCountingResourceHolder(T object,
                                       Closeable closer)
```
- Method Detail
  - leakedResources
```
public static long leakedResources()
```
  - fromCloseable
```
public static <T extends Closeable> ReferenceCountingResourceHolder<T> fromCloseable(T object)
```
  - get
```
public T get()
```
    Returns the resource with an initial reference count of 1. More references can be added by calling increment().
    
    Specified by:
    
    get in interface ResourceHolder<T>
  - increment
```
public ResourceHolder<T> increment()
```
    Increments the reference count by 1 and returns a ResourceHolder representing the new references. The returned ResourceHolder "close" method decrements the reference count when the caller no longer needs the resource. Returned ResourceHolder are not thread-safe. If multiple threads need references to the same resource, they should each call this method on the original object.
  - close
```
public void close()
```
    Decrements the reference count by 1. If it reaches to 0, then closes closer.
    
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface ResourceHolder<T>