RefreshAndDoubleCheckOnFailUnlessStatusInvalid (Apache jclouds 1.8.1 API)

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RefreshAndDoubleCheckOnFailUnlessStatusInvalid (Apache jclouds 1.8.1 API)

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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
  
  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)
```

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