| Class | Description | 
|---|---|
| Markers | Collection of SLF4J  Markers used to identifyWatcherlog messages. | 
| Watcher | Collects system status and reports it to logger. | 
| WatcherConfig | Collection of properties that drive  WatcherandWatcherDatabehavior. | 
| WatcherData | Adapts the  SystemDatato semantics required by Watcher. | 
| WatcherServlet | Simple servlet that reacts to GET methods by invoking the default watcher to report system status. | 
| WatcherSingleton | Keeps the default watcher singleton. |