Sniffer (sniffer 7.4.2 API)

java.lang.Object
- org.elasticsearch.client.sniff.Sniffer

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable
```
public class Sniffer
extends java.lang.Object
implements java.io.Closeable
```
Class responsible for sniffing nodes from some source (default is elasticsearch itself) and setting them to a provided instance of RestClient. Must be created via SnifferBuilder, which allows to set all of the different options or rely on defaults. A background task fetches the nodes through the NodesSniffer and sets them to the RestClient instance. It is possible to perform sniffing on failure by creating a SniffOnFailureListener and providing it as an argument to RestClientBuilder.setFailureListener(RestClient.FailureListener). The Sniffer implementation needs to be lazily set to the previously created SniffOnFailureListener through SniffOnFailureListener.setSniffer(Sniffer).

Method Summary

Modifier and Type	Method	Description
`static SnifferBuilder`	`builder(RestClient restClient)`	Returns a new `SnifferBuilder` to help with `Sniffer` creation.
`void`	`close()`
`void`	`sniffOnFailure()`	Schedule sniffing to run as soon as possible if it isn't already running.

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

- Method Detail
  - sniffOnFailure
```
public void sniffOnFailure()
```
    Schedule sniffing to run as soon as possible if it isn't already running. Once such sniffing round runs it will also schedule a new round after sniffAfterFailureDelay ms.
  - close
```
public void close()
```
    Specified by:
    
    close in interface java.lang.AutoCloseable
    
    Specified by:
    
    close in interface java.io.Closeable
  - builder
```
public static SnifferBuilder builder(RestClient restClient)
```
    Returns a new SnifferBuilder to help with Sniffer creation.
    
    Parameters:
    
    restClient - the client that gets its hosts set (via RestClient.setNodes(Collection)) once they are fetched
    
    Returns:
    
    a new instance of SnifferBuilder