ThreadDeathWatcher (Netty API Reference (4.2.1.Final))

java.lang.Object
- io.netty.util.ThreadDeathWatcher

```
@Deprecated
public final class ThreadDeathWatcher
extends java.lang.Object
```
Deprecated.
will be removed in the next major release

Checks if a thread is alive periodically and runs a task when a thread dies.
This thread starts a daemon thread to check the state of the threads being watched and to invoke their associated Runnables. When there is no thread to watch (i.e. all threads are dead), the daemon thread will terminate itself, and a new daemon thread will be started again when a new watch is added.

Method Summary

All Methods Static Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`static boolean`	`awaitInactivity(long timeout, java.util.concurrent.TimeUnit unit)`	Deprecated. Waits until the thread of this watcher has no threads to watch and terminates itself.
`static void`	`unwatch(java.lang.Thread thread, java.lang.Runnable task)`	Deprecated. Cancels the task scheduled via `watch(Thread, Runnable)`.
`static void`	`watch(java.lang.Thread thread, java.lang.Runnable task)`	Deprecated. Schedules the specified `task` to run when the specified `thread` dies.

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

- Method Detail
  - watch
```
public static void watch(java.lang.Thread thread,
                         java.lang.Runnable task)
```
    Deprecated.
    
    Schedules the specified task to run when the specified thread dies.
    
    Parameters:
    
    thread - the Thread to watch
    
    task - the Runnable to run when the thread dies
    
    Throws:
    
    java.lang.IllegalArgumentException - if the specified thread is not alive
  - unwatch
```
public static void unwatch(java.lang.Thread thread,
                           java.lang.Runnable task)
```
    Deprecated.
    
    Cancels the task scheduled via watch(Thread, Runnable).
  - awaitInactivity
```
public static boolean awaitInactivity(long timeout,
                                      java.util.concurrent.TimeUnit unit)
                               throws java.lang.InterruptedException
```
    Deprecated.
    
    Waits until the thread of this watcher has no threads to watch and terminates itself. Because a new watcher thread will be started again on watch(Thread, Runnable), this operation is only useful when you want to ensure that the watcher thread is terminated after your application is shut down and there's no chance of calling watch(Thread, Runnable) afterwards.
    
    Returns:
    
    true if and only if the watcher thread has been terminated
    
    Throws:
    
    java.lang.InterruptedException