| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * 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.onlab.util; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Wrapper for a recurring task which catches all exceptions to prevent task |
| * being suppressed in a ScheduledExecutorService. |
| */ |
| public final class SafeRecurringTask implements Runnable { |
| |
| private static final Logger log = LoggerFactory.getLogger(SafeRecurringTask.class); |
| |
| private final Runnable runnable; |
| |
| /** |
| * Constructor. |
| * |
| * @param runnable runnable to wrap |
| */ |
| private SafeRecurringTask(Runnable runnable) { |
| this.runnable = runnable; |
| } |
| |
| @Override |
| public void run() { |
| if (Thread.currentThread().isInterrupted()) { |
| log.info("Task interrupted, quitting"); |
| return; |
| } |
| |
| try { |
| runnable.run(); |
| } catch (Exception e) { |
| // Catch all exceptions to avoid task being suppressed |
| log.error("Exception thrown during task", e); |
| } |
| } |
| |
| /** |
| * Wraps a runnable in a safe recurring task. |
| * |
| * @param runnable runnable to wrap |
| * @return safe recurring task |
| */ |
| public static SafeRecurringTask wrap(Runnable runnable) { |
| return new SafeRecurringTask(runnable); |
| } |
| |
| } |