ADFScheduledExecutor.java

/**
 * 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.falcon.adfservice;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 * ADF thread pool executor.
 */
public class ADFScheduledExecutor extends ScheduledThreadPoolExecutor {

    private static final Logger LOG = LoggerFactory.getLogger(ADFScheduledExecutor.class);

    public ADFScheduledExecutor(int corePoolSize) {
        super(corePoolSize);
    }

    @Override
    public ScheduledFuture scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit) {
        return super.scheduleAtFixedRate(wrapRunnable(command), initialDelay, period, unit);
    }

    @Override
    public ScheduledFuture scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit) {
        return super.scheduleWithFixedDelay(wrapRunnable(command), initialDelay, delay, unit);
    }

    private Runnable wrapRunnable(Runnable command) {
        return new LogOnExceptionRunnable(command);
    }

    private static class LogOnExceptionRunnable implements Runnable {
        private Runnable runnable;

        public LogOnExceptionRunnable(Runnable runnable) {
            super();
            this.runnable = runnable;
        }

        @Override
        public void run() {
            try {
                runnable.run();
            } catch (Throwable t) {
                LOG.info("Error while executing: {}", t.getMessage());
                throw new RuntimeException(t);
            }
        }
    }
}