org.jclouds.compute.predicates.internal
Class RefreshAndDoubleCheckOnFailUnlessStatusInvalid<S extends Enum<S>,C extends ComputeMetadataIncludingStatus<S>>

java.lang.Object
  org.jclouds.compute.predicates.internal.RefreshAndDoubleCheckOnFailUnlessStatusInvalid<S,C>

All Implemented Interfaces:

com.google.common.base.Predicate<AtomicReference<C>>

Direct Known Subclasses:

RefreshImageAndDoubleCheckOnFailUnlessStatusInvalid, RefreshNodeAndDoubleCheckOnFailUnlessStatusInvalid

@Singleton
public abstract class RefreshAndDoubleCheckOnFailUnlessStatusInvalid<S extends Enum<S>,C extends ComputeMetadataIncludingStatus<S>>
extends Object
implements com.google.common.base.Predicate<AtomicReference<C>>

Keep an atomic reference to a resource, so as to eliminate a redundant ComputeService#getNodeMetadata call after the predicate passes.

Field Summary

protected org.jclouds.logging.Logger

logger

Constructor Summary

RefreshAndDoubleCheckOnFailUnlessStatusInvalid(S intended, Set<S> invalids)

Method Summary

boolean	apply(AtomicReference<C> atomicResource)
boolean	checkStatus(C resource)
protected abstract C	refreshOrNull(C resource)

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.common.base.Predicate

equals

Field Detail

logger

protected org.jclouds.logging.Logger logger

Constructor Detail

RefreshAndDoubleCheckOnFailUnlessStatusInvalid

public RefreshAndDoubleCheckOnFailUnlessStatusInvalid(S intended,
                                                      Set<S> invalids)

Method Detail

apply

public boolean apply(AtomicReference<C> atomicResource)

Specified by:

apply in interface com.google.common.base.Predicate<AtomicReference<C extends ComputeMetadataIncludingStatus<S>>>

checkStatus

public boolean checkStatus(C resource)

refreshOrNull

protected abstract C refreshOrNull(C resource)