alluxio.resource

Interface Pool<T>

Type Parameters:

T - the type of resource this pool manages

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

BlockMasterClientPool, BlockMasterClientPool, BlockWorkerClientPool, DynamicResourcePool, FileSystemMasterClientPool, HiveClientPool, JobMasterClientPool, ResourcePool

public interface Pool<T>
extends Closeable

Interface representing a pool of resources to be temporarily used and returned.

Method Summary

Modifier and Type	Method and Description
T	acquire() Acquires a resource from the pool.
T	acquire(long time, TimeUnit unit) Acquires a resource from the pool.
void	release(T resource) Releases the resource to the pool.
int	size()

Methods inherited from interface java.io.Closeable

close

Method Detail

acquire

T acquire()
   throws IOException

Acquires a resource from the pool.

Returns:

the acquired resource which should not be null

Throws:

IOException

acquire

T acquire(long time,
          TimeUnit unit)
   throws TimeoutException,
          IOException

Acquires a resource from the pool.

Parameters:

time - time it takes before timeout if no resource is available

unit - the unit of the time

Returns:

the acquired resource which should not be null

Throws:

TimeoutException

IOException

release

void release(T resource)

Releases the resource to the pool.

Parameters:

resource - the resource to release

size

int size()

Returns:

the current pool size