Promise (ActiveMQ 5.17.0 API)

java.lang.Object
- org.apache.activemq.util.PromiseCallback<T>
- - org.apache.activemq.util.Promise<T>

```
public class Promise<T>
extends PromiseCallback<T>
```
Used to implement callback based result passing of a promised computation. Can be converted to a future using the future() method.

Author:

Hiram Chirino

Constructor Summary

Constructors
Constructor Description

Promise()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Future<T>`	`future()`
`void`	`onComplete(T value, Throwable error)`
`void`	`watch(PromiseCallback<T> callback)`

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

Constructor Detail
- Promise
```
public Promise()
```

Method Detail

future
```
public Future<T> future()
```

watch

public void watch(PromiseCallback<T> callback)

onComplete

public void onComplete(T value,
                       Throwable error)

Specified by:: onComplete in class PromiseCallback<T>