voldemort.utils.pool
Class ResourcePoolConfig

java.lang.Object
  voldemort.utils.pool.ResourcePoolConfig

public class ResourcePoolConfig
extends java.lang.Object

Resource pool config class.

Constructor Summary

ResourcePoolConfig()

Method Summary

int	getMaximumInvalidResourceCreationLimit() Get the maximum number of invalid resources that can be created before throwing an exception.
int	getMaxPoolSize() Get the size of the pool
long	getTimeout(java.util.concurrent.TimeUnit unit) Get the the pool timeout in the given units
boolean	isFair() Controls whether the pool gives resources to threads in the order they arrive or not
ResourcePoolConfig	setIsFair(boolean isFair) Controls whether the pool gives resources to threads in the order they arrive or not.
ResourcePoolConfig	setMaxInvalidAttempts(int limit) The maximum number of successive invalid resources that can be created in a single checkout.
ResourcePoolConfig	setMaxPoolSize(int poolSize) The size of the pool to maintain for each key.
ResourcePoolConfig	setTimeout(long timeout, java.util.concurrent.TimeUnit unit) The timeout which we block for when a resource is not available

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourcePoolConfig

public ResourcePoolConfig()

Method Detail

getMaxPoolSize

public int getMaxPoolSize()

Get the size of the pool

setMaxPoolSize

public ResourcePoolConfig setMaxPoolSize(int poolSize)

The size of the pool to maintain for each key. The default pool size is 20

Parameters:

poolSize - The desired per-key pool size

getTimeout

public long getTimeout(java.util.concurrent.TimeUnit unit)

Get the the pool timeout in the given units

Parameters:

unit - The units in which to fetch the timeout

Returns:

The timeout

setTimeout

public ResourcePoolConfig setTimeout(long timeout,
                                     java.util.concurrent.TimeUnit unit)

The timeout which we block for when a resource is not available

Parameters:

timeout - The timeout

unit - The units of the timeout

setMaxInvalidAttempts

public ResourcePoolConfig setMaxInvalidAttempts(int limit)

The maximum number of successive invalid resources that can be created in a single checkout. The purpose of this parameter is to avoid churning the created objects in the case that the created object is immediately invalid. Default is unlimited.

Parameters:

limit - The desired limit

getMaximumInvalidResourceCreationLimit

public int getMaximumInvalidResourceCreationLimit()

Get the maximum number of invalid resources that can be created before throwing an exception.

isFair

public boolean isFair()

Controls whether the pool gives resources to threads in the order they arrive or not

setIsFair

public ResourcePoolConfig setIsFair(boolean isFair)

Controls whether the pool gives resources to threads in the order they arrive or not. An unfair pool is approximately 10x faster, but gives not guarantee on the order in which waiting threads get a resource.