--- /dev/null
+/*
+ * Copyright (c) 2019 AT&T Intellectual Property. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License. You may obtain
+ * a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+package org.akraino.validation.ui.conf;
+
+import java.lang.reflect.Field;
+import java.util.Comparator;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.PriorityBlockingQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+public class UiUtils {
+
+ private static final int QUEUE_CAPACITY = 500;
+ private static final int EXECUTOR_SIZE = 20; // the number of threads to keep in the pool, even if
+ // they are idle, unless allowCoreThreadTimeOut is
+ // set
+ private static final int EXECUTOR_MAX_SIZE = 20; // the maximum number of threads to allow in the pool
+ private static final int KEEPALIVE_TIME = 20; // when the number of threads is greater than the
+ // core, this is the maximum time that excess idle
+ // threads will wait for new tasks before
+ // terminating.
+ private static final PriorityBlockingQueue<Runnable> BLOCKING_QUEUE =
+ new PriorityBlockingQueue<Runnable>(QUEUE_CAPACITY, new CFRunnableComparator());
+ public static ExecutorService executorService =
+ new ThreadPoolExecutor(EXECUTOR_SIZE, EXECUTOR_MAX_SIZE, KEEPALIVE_TIME, TimeUnit.SECONDS, BLOCKING_QUEUE);
+
+ public static final String NEXUS_URL = "https://nexus.akraino.org/content/sites/logs";
+
+ private static class CFRunnableComparator implements Comparator<Runnable> {
+ @Override
+ @SuppressWarnings("unchecked")
+ public int compare(Runnable runnable1, Runnable runnable2) {
+ return ((Comparable) unwrap(runnable1)).compareTo(unwrap(runnable2));
+ }
+
+ private Object unwrap(Runnable runnable) {
+ try {
+ Field field = runnable.getClass().getDeclaredField("fn");
+ field.setAccessible(true);
+ return field.get(runnable);
+ } catch (IllegalAccessException | NoSuchFieldException e) {
+ throw new IllegalArgumentException("Couldn't unwrap " + runnable, e);
+ }
+ }
+ }
+
+}