brooklyn.policy.loadbalancing
[Java] Class LoadBalancingPolicy

java.lang.Object
  brooklyn.policy.basic.AbstractEntityAdjunct
      brooklyn.policy.basic.AbstractPolicy
          brooklyn.policy.loadbalancing.LoadBalancingPolicy

public class LoadBalancingPolicy
extends AbstractPolicy

Policy that is attached to a pool of "containers", each of which can host one or more migratable "items". The policy monitors the workrates of the items and effects migrations in an attempt to ensure that the containers are all sufficiently utilized without any of them being overloaded.

The particular sensor that defines the items' workrates is specified when the policy is constructed. High- and low-thresholds are defined as configuration keys on each of the container entities in the pool: for an item sensor named foo.bar.sensorName, the corresponding container config keys would be named foo.bar.sensorName.threshold.low and foo.bar.sensorName.threshold.high.

In addition to balancing items among the available containers, this policy causes the pool Entity to emit POOL_COLD and POOL_HOT events when it is determined that there is a surplus or shortfall of container resource in the pool respectively. These events may be consumed by a separate policy that is capable of resizing the container pool.

LoadBalancingPolicy

public LoadBalancingPolicy(AttributeSensor metric, BalanceablePoolModel model)

LoadBalancingPolicy

public LoadBalancingPolicy(java.util.Map props, AttributeSensor metric, BalanceablePoolModel model)

resume

@Override
public void resume()

setEntity

@Override
public void setEntity(EntityLocal entity)

suspend

@Override
public void suspend()

toString

@Override
public java.lang.String toString()

Brooklyn Multi-Cloud Application Management Platform
brooklyncentral.github.com. Apache License. © 2012.