Package org.apache.druid.collections

Class DummyBlockingPool<T>

java.lang.Object

org.apache.druid.collections.DummyBlockingPool<T>

All Implemented Interfaces:

BlockingPool<T>

public final class DummyBlockingPool<T>
extends Object
implements BlockingPool<T>

BlockingPool with 0 maxSize, all take*() methods immediately throw UnsupportedOperationException.

Method Summary

Modifier and Type	Method	Description
long	getPendingRequests()	Returns the count of the requests waiting to acquire a batch of resources.
static <T> BlockingPool<T>	instance()
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.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

instance

public static <T> BlockingPool<T> instance()

maxSize

public int maxSize()

Specified by:

maxSize in interface BlockingPool<T>

takeBatch

public List<ReferenceCountingResourceHolder<T>> takeBatch(int elementNum,
                                                          long timeoutMs)

Description copied from interface: BlockingPool

Take resources from the pool, waiting up to the specified wait time if necessary for elements of the given number to become available.

Specified by:

takeBatch in interface BlockingPool<T>

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

public List<ReferenceCountingResourceHolder<T>> takeBatch(int elementNum)

Description copied from interface: BlockingPool

Take resources from the pool, waiting if necessary until the elements of the given number become available.

Specified by:

takeBatch in interface BlockingPool<T>

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

public long getPendingRequests()

Description copied from interface: BlockingPool

Returns the count of the requests waiting to acquire a batch of resources.

Specified by:

getPendingRequests in interface BlockingPool<T>

Returns:

count of pending requests