2 * Copyright (c) 2019 AT&T Intellectual Property. All rights reserved.
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may
5 * not use this file except in compliance with the License. You may obtain
6 * a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
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
13 * implied. See the License for the specific language governing
14 * permissions and limitations under the License.
16 package org.akraino.validation.ui.conf;
18 import java.lang.reflect.Field;
19 import java.util.Comparator;
20 import java.util.concurrent.ExecutorService;
21 import java.util.concurrent.PriorityBlockingQueue;
22 import java.util.concurrent.ThreadPoolExecutor;
23 import java.util.concurrent.TimeUnit;
25 public class UiUtils {
27 private static final int QUEUE_CAPACITY = 500;
28 private static final int EXECUTOR_SIZE = 20; // the number of threads to keep in the pool, even if
29 // they are idle, unless allowCoreThreadTimeOut is
31 private static final int EXECUTOR_MAX_SIZE = 20; // the maximum number of threads to allow in the pool
32 private static final int KEEPALIVE_TIME = 20; // when the number of threads is greater than the
33 // core, this is the maximum time that excess idle
34 // threads will wait for new tasks before
36 private static final PriorityBlockingQueue<Runnable> BLOCKING_QUEUE =
37 new PriorityBlockingQueue<Runnable>(QUEUE_CAPACITY, new CFRunnableComparator());
38 public static ExecutorService executorService =
39 new ThreadPoolExecutor(EXECUTOR_SIZE, EXECUTOR_MAX_SIZE, KEEPALIVE_TIME, TimeUnit.SECONDS, BLOCKING_QUEUE);
41 public static final String NEXUS_URL = "https://nexus.akraino.org/content/sites/logs";
43 private static class CFRunnableComparator implements Comparator<Runnable> {
45 @SuppressWarnings("unchecked")
46 public int compare(Runnable runnable1, Runnable runnable2) {
47 return ((Comparable) unwrap(runnable1)).compareTo(unwrap(runnable2));
50 private Object unwrap(Runnable runnable) {
52 Field field = runnable.getClass().getDeclaredField("fn");
53 field.setAccessible(true);
54 return field.get(runnable);
55 } catch (IllegalAccessException | NoSuchFieldException e) {
56 throw new IllegalArgumentException("Couldn't unwrap " + runnable, e);