PerNameExecutor.java revision a48af083ff81555261f334a1e050eae3b02a746c 
1/*
2 * Copyright (C) 2010 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 com.android.quicksearchbox.util;
18
19
20import java.util.HashMap;
21
22/**
23 * Uses a separate executor for each task name.
24 */
25public class PerNameExecutor implements NamedTaskExecutor {
26
27    private final Factory<NamedTaskExecutor> mExecutorFactory;
28    private HashMap<String, NamedTaskExecutor> mExecutors;
29
30    /**
31     * @param executorFactory Used to run the commands.
32     */
33    public PerNameExecutor(Factory<NamedTaskExecutor> executorFactory) {
34        mExecutorFactory = executorFactory;
35    }
36
37    public synchronized void cancelPendingTasks() {
38        for (NamedTaskExecutor executor : mExecutors.values()) {
39            executor.cancelPendingTasks();
40        }
41    }
42
43    public synchronized void close() {
44        for (NamedTaskExecutor executor : mExecutors.values()) {
45            executor.close();
46        }
47    }
48
49    public synchronized void execute(NamedTask task) {
50        if (mExecutors == null) {
51            mExecutors = new HashMap<String, NamedTaskExecutor>();
52        }
53        String name = task.getName();
54        NamedTaskExecutor executor = mExecutors.get(name);
55        if (executor == null) {
56            executor = mExecutorFactory.create();
57            mExecutors.put(name, executor);
58        }
59        executor.execute(task);
60    }
61
62}
63