DelayedQueue.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.rerun.queue;

import org.apache.falcon.FalconException;
import org.apache.falcon.rerun.event.RerunEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;

/**
 * Base class for a Queue implementation.
 * @param <T>
 */
public abstract class DelayedQueue<T extends RerunEvent> {
    public static final Logger LOG = LoggerFactory.getLogger(DelayedQueue.class);

    public abstract boolean offer(T event) throws FalconException;

    public abstract T take() throws FalconException;

    public abstract void populateQueue(List<T> events);

    public abstract void init();

    public abstract void reconnect() throws FalconException;
}