me.prettyprint.cassandra.connection
Class RoundRobinBalancingPolicy

java.lang.Object
  me.prettyprint.cassandra.connection.RoundRobinBalancingPolicy

All Implemented Interfaces:

Serializable, LoadBalancingPolicy

public class RoundRobinBalancingPolicy
extends Object
implements LoadBalancingPolicy

Implements a RoundRobin balancing policy based off the contents of the active HClientPool. If a pool is shutdown by another thread in the midst of the selection process, we return the pool at position 0

Author:

zznate

See Also:

Serialized Form

Constructor Summary

RoundRobinBalancingPolicy()

Method Summary

HClientPool	createConnection(HClientFactory clientFactory, CassandraHost host, CassandraClientMonitor monitor) Creates a connection pool for host.
HClientPool	getPool(Collection<HClientPool> pools, Set<CassandraHost> excludeHosts) Retrieves a pool from the collection of pools excluding excludeHosts.

Methods inherited from class java.lang.Object

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

Constructor Detail

RoundRobinBalancingPolicy

public RoundRobinBalancingPolicy()

Method Detail

getPool

public HClientPool getPool(Collection<HClientPool> pools,
                           Set<CassandraHost> excludeHosts)

Description copied from interface: LoadBalancingPolicy

Retrieves a pool from the collection of pools excluding excludeHosts.

Specified by:

getPool in interface LoadBalancingPolicy

Parameters:

pools - collection of all available pools

excludeHosts - excluded pools

Returns:

a pool based on this load balancing policy

createConnection

public HClientPool createConnection(HClientFactory clientFactory,
                                    CassandraHost host,
                                    CassandraClientMonitor monitor)

Description copied from interface: LoadBalancingPolicy

Creates a connection pool for host.

Specified by:

createConnection in interface LoadBalancingPolicy

Parameters:

clientFactory - an instance of HClientFactory

host - an instance of CassandraHost representing the host this pool will represent

monitor - the monitor exposing JMX methods

Returns:

a connection pool