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.

Author:

Adrian Cole

Field Summary

Fields

Modifier and Type	Field and Description
protected Logger	logger

Constructor Summary

Constructors

Constructor and Description
RefreshAndDoubleCheckOnFailUnlessStatusInvalid(S intended, Set<S> invalids)

Method Summary

Methods

Modifier and Type	Method and Description
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 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)