FutureCallback.kt
/*
* Copyright 2023 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.camera.impl.utils.futures
import com.google.common.util.concurrent.ListenableFuture
import java.util.concurrent.ExecutionException
import java.util.concurrent.Future
/**
* Cloned from concurrent-futures package in Guava to AndroidX namespace since we would need
* ListenableFuture related implementation but not want to include whole Guava library.
*
* A callback for accepting the results of a [Future] computation
* asynchronously.
*
*
* To attach to a [ListenableFuture] use [Futures.addCallback].
*
* @author Anthony Zana
* @since 10.0
* @param <V>
</V> */
interface FutureCallback<V> {
/** Invoked with the result of the `Future` computation when it is successful. */
fun onSuccess(result: V?)
/**
* Invoked when a `Future` computation fails or is canceled.
*
*
* If the future's [get][Future.get] method throws an [ExecutionException], then
* the cause is passed to this method. Any other thrown object is passed unaltered.
*/
fun onFailure(t: Throwable)
}