BlockingPool (druid-processing 28.0.0 API)

All Known Implementing Classes:

DefaultBlockingPool, DummyBlockingPool
```
public interface BlockingPool<T>
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`long`	`getPendingRequests()`	Returns the count of the requests waiting to acquire a batch of resources.
`int`	`maxSize()`
`List<ReferenceCountingResourceHolder<T>>`	`takeBatch(int elementNum)`	Take resources from the pool, waiting if necessary until the elements of the given number become available.
`List<ReferenceCountingResourceHolder<T>>`	`takeBatch(int elementNum, long timeoutMs)`	Take resources from the pool, waiting up to the specified wait time if necessary for elements of the given number to become available.

- Method Detail
  - maxSize
```
int maxSize()
```
  - takeBatch
```
List<ReferenceCountingResourceHolder<T>> takeBatch(int elementNum,
                                                   long timeoutMs)
```
    Take resources from the pool, waiting up to the specified wait time if necessary for elements of the given number to become available.
    
    Parameters:
    
    elementNum - number of resources to take
    
    timeoutMs - maximum time to wait for resources, in milliseconds.
    
    Returns:
    
    a list of resource holders. An empty list is returned if elementNum resources aren't available.
  - takeBatch
```
List<ReferenceCountingResourceHolder<T>> takeBatch(int elementNum)
```
    Take resources from the pool, waiting if necessary until the elements of the given number become available.
    
    Parameters:
    
    elementNum - number of resources to take
    
    Returns:
    
    a list of resource holders. An empty list is returned if elementNum resources aren't available.
  - getPendingRequests
```
long getPendingRequests()
```
    Returns the count of the requests waiting to acquire a batch of resources.
    
    Returns:
    
    count of pending requests