FileWatcher (server 6.7.2 API)

java.lang.Object
- org.elasticsearch.watcher.AbstractResourceWatcher<FileChangesListener>
- - org.elasticsearch.watcher.FileWatcher

All Implemented Interfaces:

ResourceWatcher
```
public class FileWatcher
extends AbstractResourceWatcher<FileChangesListener>
```
File resources watcher The file watcher checks directory and all its subdirectories for file changes and notifies its listeners accordingly

Constructor Summary

Constructors
Constructor Description

FileWatcher(java.nio.file.Path file)
Creates new file watcher on the given directory

Method Summary

Modifier and Type	Method	Description
`void`	`clearState()`	Clears any state with the FileWatcher, making all files show up as new
`protected void`	`doCheckAndNotify()`	Will be called periodically
`protected void`	`doInit()`	Will be called once on initialization

Methods inherited from class org.elasticsearch.watcher.AbstractResourceWatcher
addListener, checkAndNotify, init, listeners, remove

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

- Constructor Detail
  - FileWatcher
```
public FileWatcher(java.nio.file.Path file)
```
    Creates new file watcher on the given directory
- Method Detail
  - clearState
```
public void clearState()
```
    Clears any state with the FileWatcher, making all files show up as new
  - doInit
```
protected void doInit()
               throws java.io.IOException
```
    Description copied from class: AbstractResourceWatcher
    
    Will be called once on initialization
    
    Specified by:
    
    doInit in class AbstractResourceWatcher<FileChangesListener>
    
    Throws:
    
    java.io.IOException
  - doCheckAndNotify
```
protected void doCheckAndNotify()
                         throws java.io.IOException
```
    Description copied from class: AbstractResourceWatcher
    
    Will be called periodically
    Implementing watcher should check resource and notify all AbstractResourceWatcher.listeners().
    
    Specified by:
    
    doCheckAndNotify in class AbstractResourceWatcher<FileChangesListener>
    
    Throws:
    
    java.io.IOException