WatchableSource (Helidon Project 2.6.13 API)

Type Parameters:

T - Type of target of this config source

All Known Implementing Classes:

DirectoryConfigSource, EtcdConfigSource, FileConfigSource, FileOverrideSource, UrlConfigSource, UrlOverrideSource
```
public interface WatchableSource<T>
```
A source implementing this interface provides a target that a ChangeWatcher can use.

See Also:

ChangeWatcher

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static interface WatchableSource.Builder<B extends WatchableSource.Builder<B,T>,T>
A builder for a watchable source.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`Optional<ChangeWatcher<Object>>`	`changeWatcher()`	If a change watcher is configured with this source, return it.
`T`	`target()`	The target of this source.
`default Class<T>`	`targetType()`	Target type as supported by this source.

- Method Detail
  - targetType
```
default Class<T> targetType()
```
    Target type as supported by this source.
    
    Returns:
    
    class of the target, by default used for target()
  - target
```
T target()
```
    The target of this source.
    
    Returns:
    
    target this source is configured with, never null
  - changeWatcher
```
Optional<ChangeWatcher<Object>> changeWatcher()
```
    If a change watcher is configured with this source, return it. The source implementation does not need to handle change watcher .
    
    Returns:
    
    change watcher if one is configured on this source