1 /*
2  * Copyright (C) 2009 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.quicksearchbox.util;
18 
19 /**
20  * Runs tasks that have a name tag.
21  */
22 public interface NamedTaskExecutor {
23 
24     /**
25      * Schedules a task for execution. Implementations should not throw
26      * {@link java.util.concurrent.RejectedExecutionException} if the task
27      * cannot be run. They should drop it silently instead.
28      */
execute(NamedTask task)29     void execute(NamedTask task);
30 
31     /**
32      * Stops any unstarted tasks from running. Implementations of this method must be
33      * idempotent.
34      */
cancelPendingTasks()35     void cancelPendingTasks();
36 
37     /**
38      * Shuts down this executor, freeing any resources that it owns. The executor
39      * may not be used after calling this method. Implementations of this method must be
40      * idempotent.
41      */
close()42     void close();
43 
44 }
45