Announcer (druid-server 29.0.1 API)

java.lang.Object
- org.apache.druid.curator.announcement.Announcer

```
public class Announcer
extends Object
```
Announces things on Zookeeper.

Constructor Summary

Constructors
Constructor Description

Announcer(org.apache.curator.framework.CuratorFramework curator, ExecutorService exec)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`announce(String path, byte[] bytes)`	Like announce(path, bytes, true).
`void`	`announce(String path, byte[] bytes, boolean removeParentIfCreated)`	Announces the provided bytes at the given path.
`void`	`start()`
`void`	`stop()`
`void`	`unannounce(String path)`	Unannounces an announcement created at path.
`void`	`update(String path, byte[] bytes)`

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

- Constructor Detail
  - Announcer
```
public Announcer(org.apache.curator.framework.CuratorFramework curator,
                 ExecutorService exec)
```
- Method Detail
  - start
```
public void start()
```
  - stop
```
public void stop()
```
  - announce
```
public void announce(String path,
                     byte[] bytes)
```
    Like announce(path, bytes, true).
  - announce
```
public void announce(String path,
                     byte[] bytes,
                     boolean removeParentIfCreated)
```
    Announces the provided bytes at the given path. Announcement means that it will create an ephemeral node and monitor it to make sure that it always exists until it is unannounced or this object is closed.
    
    Parameters:
    
    path - The path to announce at
    
    bytes - The payload to announce
    
    removeParentIfCreated - remove parent of "path" if we had created that parent
  - update
```
public void update(String path,
                   byte[] bytes)
```
  - unannounce
```
public void unannounce(String path)
```
    Unannounces an announcement created at path. Note that if all announcements get removed, the Announcer will continue to have ZK watches on paths because clearing them out is a source of ugly race conditions.
    If you need to completely clear all the state of what is being watched and announced, stop() the Announcer.
    
    Parameters:
    
    path - the path to unannounce