| Class | Description | 
|---|---|
| TaskAnnouncement | 
 Used by workers to announce the status of tasks they are currently running. 
 | 
| Worker | 
 A container for worker metadata. 
 | 
| WorkerCuratorCoordinator | 
 The CuratorCoordinator provides methods to use Curator. 
 | 
| WorkerTaskMonitor | 
 The monitor watches ZK at a specified path for new tasks to appear. 
 | 
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