LivelinessToken

All Implemented Interfaces:

io.zenoh.session.SessionDeclaration , java.lang.AutoCloseable
```
public final class LivelinessToken
 implements SessionDeclaration, AutoCloseable
                    
```
A token whose liveliness is tied to the Zenoh io.zenoh.Session.
A declared liveliness token will be seen as alive by any other Zenoh application in the system that monitors it while the liveliness token is not undeclared or dropped, while the Zenoh application that declared it is alive (didn't stop or crashed) and while the Zenoh application that declared the token has Zenoh connectivity with the Zenoh application that monitors it.
A token whose last reference is dropped is undeclared by the garbage-collection backstop (non-deterministic — call undeclare or close to withdraw the liveliness promptly).

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description

Constructor Summary

Constructors
Constructor	Description

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`Unit`	`undeclare()`	Undeclares the token.
`Unit`	`close()`	Closes the token.

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

- Constructor Detail
- Method Detail
  - undeclare
```
 Unit undeclare()
```
    Undeclares the token.
  - close
```
 Unit close()
```
    Closes the token. This function is equivalent to undeclare. When using try-with-resources, this function is called automatically.