SingleObjectCache (server 6.8.16 API)

java.lang.Object
- org.elasticsearch.common.util.SingleObjectCache<T>

```
public abstract class SingleObjectCache<T>
extends java.lang.Object
```
A very simple single object cache that allows non-blocking refresh calls triggered by expiry time.

Field Summary

Fields
Modifier and Type Field Description

protected long lastRefreshTimestamp

Constructor Summary

Constructors
Modifier Constructor Description

protected SingleObjectCache(TimeValue refreshInterval, T initialValue)

Method Summary

Modifier and Type	Method	Description
`protected T`	`getNoRefresh()`	Return the potentially stale cached entry.
`T`	`getOrRefresh()`	Returns the currently cached object and potentially refreshes the cache before returning.
`protected boolean`	`needsRefresh()`	Returns `true` iff the cache needs to be refreshed.
`protected abstract T`	`refresh()`	Returns a new instance to cache

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - lastRefreshTimestamp
```
protected long lastRefreshTimestamp
```
- Constructor Detail
  - SingleObjectCache
```
protected SingleObjectCache(TimeValue refreshInterval,
                            T initialValue)
```
- Method Detail
  - getOrRefresh
```
public T getOrRefresh()
```
    Returns the currently cached object and potentially refreshes the cache before returning.
  - getNoRefresh
```
protected final T getNoRefresh()
```
    Return the potentially stale cached entry.
  - refresh
```
protected abstract T refresh()
```
    Returns a new instance to cache
  - needsRefresh
```
protected boolean needsRefresh()
```
    Returns true iff the cache needs to be refreshed.