1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.os;
18
19import android.annotation.NonNull;
20
21import com.android.internal.util.Preconditions;
22
23import java.util.concurrent.Executor;
24import java.util.concurrent.RejectedExecutionException;
25
26/**
27 * An adapter {@link Executor} that posts all executed tasks onto the given
28 * {@link Handler}.
29 *
30 * @hide
31 */
32public class HandlerExecutor implements Executor {
33    private final Handler mHandler;
34
35    public HandlerExecutor(@NonNull Handler handler) {
36        mHandler = Preconditions.checkNotNull(handler);
37    }
38
39    @Override
40    public void execute(Runnable command) {
41        if (!mHandler.post(command)) {
42            throw new RejectedExecutionException(mHandler + " is shutting down");
43        }
44    }
45}
46