1 /* 2 * Copyright (C) 2021 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 17 package com.android.modules.utils; 18 19 import android.annotation.NonNull; 20 import android.os.Handler; 21 22 import java.util.Objects; 23 import java.util.concurrent.Executor; 24 import java.util.concurrent.RejectedExecutionException; 25 26 /** 27 * An adapter {@link Executor} that posts all executed tasks onto the given 28 * {@link Handler}. 29 */ 30 public class HandlerExecutor implements Executor { 31 private final Handler mHandler; 32 HandlerExecutor(@onNull Handler handler)33 public HandlerExecutor(@NonNull Handler handler) { 34 mHandler = Objects.requireNonNull(handler); 35 } 36 37 @Override execute(Runnable command)38 public void execute(Runnable command) { 39 if (!mHandler.post(command)) { 40 throw new RejectedExecutionException(mHandler + " is shutting down"); 41 } 42 } 43 } 44