org.apache.pulsar.common.util.Runnables Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.pulsar.common.util;
import java.util.concurrent.TimeUnit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public final class Runnables {
private static final Logger LOGGER = LoggerFactory.getLogger(Runnables.class);
private Runnables() {}
/**
* Wraps a Runnable so that throwables are caught and logged when a Runnable is run.
*
* The main usecase for this method is to be used in
* {@link java.util.concurrent.ScheduledExecutorService#scheduleAtFixedRate(Runnable, long, long, TimeUnit)}
* calls to ensure that the scheduled task doesn't get cancelled as a result of an uncaught exception.
*
* @param runnable The runnable to wrap
* @return a wrapped Runnable
*/
public static Runnable catchingAndLoggingThrowables(Runnable runnable) {
return new CatchingAndLoggingRunnable(runnable);
}
private static final class CatchingAndLoggingRunnable implements Runnable {
private final Runnable runnable;
private CatchingAndLoggingRunnable(Runnable runnable) {
this.runnable = runnable;
}
@Override
public void run() {
try {
runnable.run();
} catch (Throwable t) {
LOGGER.error("Unexpected throwable caught", t);
}
}
}
}