Cancellable

All Known Subinterfaces:

PublisherSource.Subscription

All Known Implementing Classes:

ConcurrentSubscription, DeferredEmptySubscription, DelayedCancellable, DelayedSubscription, ScalarValueSubscription, SequentialCancellable, TestCancellable, TestSubscription, ThreadInterruptingCancellable

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface Cancellable
```
An entity that can be cancelled.
Cancellations are a hint from a consumer of any asynchronous result to the producer that it is no more interested in the result. ServiceTalk does not provide any guarantees that at a certain time, whether the asynchronous execution is cancellable or not. It is up to the producer of data to take any action on cancellation or ignore the same. Thus, a consumer of the result must not assume that it will not receive any callback post cancellation i.e. after cancel() returns.

Field Summary

Fields
Modifier and Type Field Description

static Cancellable IGNORE_CANCEL
A no-op instance of Cancellable.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`cancel()`	Sends a hint to the producer of the associated asynchronous execution that the consumer related to this `Cancellable` is not interested in the outcome of the execution.

- Field Detail
  - IGNORE_CANCEL
```
static final Cancellable IGNORE_CANCEL
```
    A no-op instance of Cancellable.
- Method Detail
  - cancel
```
void cancel()
```
    Sends a hint to the producer of the associated asynchronous execution that the consumer related to this Cancellable is not interested in the outcome of the execution.