R
- The return type of the callback.T
- The argument type of the callback.public interface Callback<R,T>
Callbacks are typically created as anonymous classes. In order to make
debugging easier, it is recommended to override the Object.toString()
method so that it returns a string that briefly explains what the callback
does. If you use Deferred
with DEBUG
logging turned on,
this will be really useful to understand what's in the callback chains.
Modifier and Type | Field and Description |
---|---|
static Callback<Object,Object> |
PASSTHROUGH
The identity function (returns its argument).
|
Modifier and Type | Method and Description |
---|---|
R |
call(T arg)
The callback.
|
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