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        if (mExecutors == null) return;
39        for (NamedTaskExecutor executor : mExecutors.values()) {
40            executor.cancelPendingTasks();
41        }
42    }
43
44    public synchronized void close() {
45        if (mExecutors == null) return;
46        for (NamedTaskExecutor executor : mExecutors.values()) {
47            executor.close();
48        }
49    }
50
51    public synchronized void execute(NamedTask task) {
52        if (mExecutors == null) {
53            mExecutors = new HashMap<String, NamedTaskExecutor>();
54        }
55        String name = task.getName();
56        NamedTaskExecutor executor = mExecutors.get(name);
57        if (executor == null) {
58            executor = mExecutorFactory.create();
59            mExecutors.put(name, executor);
60        }
61        executor.execute(task);
62    }
63
64}
65