com.bigdata.jini.start.config
Class ZookeeperRunningConstraint

java.lang.Object
  com.bigdata.jini.start.config.ServiceDependencyConstraint
      com.bigdata.jini.start.config.ZookeeperRunningConstraint

All Implemented Interfaces:

IServiceConstraint, Serializable

public class ZookeeperRunningConstraint
extends ServiceDependencyConstraint

Constraint that zookeeper must be running (the ZooKeeper client is ZooKeeper.States#CONNECTED).

Version:

$Id$

Author:

Bryan Thompson

See Also:

Serialized Form

Field Summary

Fields inherited from class com.bigdata.jini.start.config.ServiceDependencyConstraint

log

Constructor Summary

ZookeeperRunningConstraint()

Method Summary

boolean

allow(JiniFederation fed) Return true iff a service may be instantiated on this host.

Methods inherited from class java.lang.Object

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

Constructor Detail

ZookeeperRunningConstraint

public ZookeeperRunningConstraint()

Method Detail

allow

public boolean allow(JiniFederation fed)
              throws Exception

Description copied from interface: IServiceConstraint

Return true iff a service may be instantiated on this host.

Note: Constraints which can be evaluated without the federation reference MUST NOT throw an exception if that reference is null. This allows us to evaluate constraints for boostrap services as well as for ManagedServiceConfigurations

Parameters:

fed - The federation.

Throws:

Exception