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.wm.shell.common;
18 
19 import android.Manifest;
20 import android.util.Slog;
21 
22 import java.util.function.Consumer;
23 
24 /**
25  * Helpers for working with executors
26  */
27 public class ExecutorUtils {
28 
29     /**
30      * Checks that the caller has the MANAGE_ACTIVITY_TASKS permission and executes the given
31      * callback.
32      */
executeRemoteCallWithTaskPermission(RemoteCallable<T> controllerInstance, String log, Consumer<T> callback)33     public static <T> void executeRemoteCallWithTaskPermission(RemoteCallable<T> controllerInstance,
34             String log, Consumer<T> callback) {
35         executeRemoteCallWithTaskPermission(controllerInstance, log, callback,
36                 false /* blocking */);
37     }
38 
39     /**
40      * Checks that the caller has the MANAGE_ACTIVITY_TASKS permission and executes the given
41      * callback.
42      */
executeRemoteCallWithTaskPermission(RemoteCallable<T> controllerInstance, String log, Consumer<T> callback, boolean blocking)43     public static <T> void executeRemoteCallWithTaskPermission(RemoteCallable<T> controllerInstance,
44             String log, Consumer<T> callback, boolean blocking) {
45         if (controllerInstance == null) return;
46 
47         final RemoteCallable<T> controller = controllerInstance;
48         controllerInstance.getContext().enforceCallingPermission(
49                 Manifest.permission.MANAGE_ACTIVITY_TASKS, log);
50         if (blocking) {
51             try {
52                 controllerInstance.getRemoteCallExecutor().executeBlocking(() -> {
53                     callback.accept((T) controller);
54                 });
55             } catch (InterruptedException e) {
56                 Slog.e("ExecutorUtils", "Remote call failed", e);
57             }
58         } else {
59             controllerInstance.getRemoteCallExecutor().execute(() -> {
60                 callback.accept((T) controller);
61             });
62         }
63     }
64 }
65