com.netflix.astyanax.connectionpool.impl

Class HostConnectionPoolPartition<CL>

java.lang.Object

com.netflix.astyanax.connectionpool.impl.HostConnectionPoolPartition<CL>

Type Parameters:

CL -

Direct Known Subclasses:

TokenHostConnectionPoolPartition

public class HostConnectionPoolPartition<CL>
extends java.lang.Object

Collection of hosts that are grouped by a certain criteria (such as token or rack) The class maintains the list of active pools for the given criteria (such as a token range in a ring) Any changes to the pools in this partition causes the active set to be revised and sorted according to the latency score strategy provided.

Note that an instance of this class is maintained / referenced for each token range partition by the TokenPartitionedTopology instance

See Also:

TokenPartitionedTopology} for details on how this class is referenced.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.concurrent.atomic.AtomicReference<java.util.List<HostConnectionPool<CL>>>	activePools
protected org.cliffc.high_scale_lib.NonBlockingHashSet<HostConnectionPool<CL>>	pools
protected java.util.concurrent.atomic.AtomicBoolean	prioritize
protected LatencyScoreStrategy	strategy

Constructor Summary

Constructors

Constructor and Description
HostConnectionPoolPartition(LatencyScoreStrategy strategy)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	addPool(HostConnectionPool<CL> pool) Add a new pool to the partition.
java.util.List<HostConnectionPool<CL>>	getPools()
boolean	hasPool(HostConnectionPool<CL> pool) Returns true if a pool is contained in this partition
boolean	isSorted() If true the the hosts are sorted by order of priority where the first host gives the best performance
void	refresh() Refresh the partition
boolean	removePool(HostConnectionPool<CL> pool)
boolean	setPools(java.util.Collection<HostConnectionPool<CL>> newPools) Sets all pools for this partition.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

prioritize

protected final java.util.concurrent.atomic.AtomicBoolean prioritize

pools

protected final org.cliffc.high_scale_lib.NonBlockingHashSet<HostConnectionPool<CL>> pools

activePools

protected final java.util.concurrent.atomic.AtomicReference<java.util.List<HostConnectionPool<CL>>> activePools

strategy

protected final LatencyScoreStrategy strategy

Constructor Detail

HostConnectionPoolPartition

public HostConnectionPoolPartition(LatencyScoreStrategy strategy)

Method Detail

setPools

public boolean setPools(java.util.Collection<HostConnectionPool<CL>> newPools)

Sets all pools for this partition. Removes old partitions and adds new one.

Parameters:

newPools -

addPool

public boolean addPool(HostConnectionPool<CL> pool)

Add a new pool to the partition. Checks to see if the pool already existed. If so then there is no need to refresh the pool.

Parameters:

pool -

Returns:

True if anything changed

removePool

public boolean removePool(HostConnectionPool<CL> pool)

getPools

public java.util.List<HostConnectionPool<CL>> getPools()

Returns:

Return the list of active hosts. Active hosts are those deemed by the latency score strategy to be alive and responsive.

isSorted

public boolean isSorted()

If true the the hosts are sorted by order of priority where the first host gives the best performance

hasPool

public boolean hasPool(HostConnectionPool<CL> pool)

Returns true if a pool is contained in this partition

Parameters:

pool -

refresh

public void refresh()

Refresh the partition

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object