alluxio.client.block

Class BlockMasterClientPool

java.lang.Object

alluxio.resource.DynamicResourcePool<BlockMasterClient>

alluxio.client.block.BlockMasterClientPool

All Implemented Interfaces:

Pool<BlockMasterClient>, Closeable, AutoCloseable

@ThreadSafe
public final class BlockMasterClientPool
extends DynamicResourcePool<BlockMasterClient>

Class for managing block master clients. After obtaining a client with ResourcePool.acquire(), ResourcePool.release(Object) must be called when the thread is done using the client.

Nested Class Summary

Nested classes/interfaces inherited from class alluxio.resource.DynamicResourcePool

DynamicResourcePool.Options, DynamicResourcePool.ResourceInternal<R>, DynamicResourcePool.SelectionPolicy

Field Summary

Fields inherited from class alluxio.resource.DynamicResourcePool

mClock, mResources, mSelectionPolicy

Constructor Summary

Constructors

Constructor and Description
BlockMasterClientPool(MasterClientContext ctx) Creates a new block master client pool.

Method Summary

Modifier and Type	Method and Description
protected void	closeResource(BlockMasterClient client) Closes the resource.
protected BlockMasterClient	createNewResource() Creates a new resource.
protected com.codahale.metrics.Counter	getMetricCounter()
protected boolean	isHealthy(BlockMasterClient client) Checks whether a resource is healthy or not.
protected boolean	shouldGc(DynamicResourcePool.ResourceInternal<BlockMasterClient> clientResourceInternal)

Methods inherited from class alluxio.resource.DynamicResourcePool

acquire, acquire, close, release, size

Methods inherited from class java.lang.Object

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

Methods inherited from interface alluxio.resource.Pool

acquireCloseable, acquireCloseable

Constructor Detail

BlockMasterClientPool

public BlockMasterClientPool(MasterClientContext ctx)

Creates a new block master client pool.

Parameters:

ctx - the information required for connecting to Alluxio

Method Detail

closeResource

protected void closeResource(BlockMasterClient client)

Description copied from class: DynamicResourcePool

Closes the resource. After this, the resource should not be used. It is not guaranteed that the resource is closed after the function returns.

Specified by:

closeResource in class DynamicResourcePool<BlockMasterClient>

Parameters:

client - the resource to close

createNewResource

protected BlockMasterClient createNewResource()

Description copied from class: DynamicResourcePool

Creates a new resource.

Specified by:

createNewResource in class DynamicResourcePool<BlockMasterClient>

Returns:

the newly created resource

isHealthy

protected boolean isHealthy(BlockMasterClient client)

Description copied from class: DynamicResourcePool

Checks whether a resource is healthy or not.

Specified by:

isHealthy in class DynamicResourcePool<BlockMasterClient>

Parameters:

client - the resource to check

Returns:

true if the resource is healthy

getMetricCounter

protected com.codahale.metrics.Counter getMetricCounter()

Specified by:

getMetricCounter in class DynamicResourcePool<BlockMasterClient>

shouldGc

protected boolean shouldGc(DynamicResourcePool.ResourceInternal<BlockMasterClient> clientResourceInternal)

Specified by:

shouldGc in class DynamicResourcePool<BlockMasterClient>

Parameters:

clientResourceInternal - the resource to check

Returns:

true if the resource should be garbage collected