IdFactory.java

/**
 * Copyright 2013 Benjamin Lerer
 * 
 * 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 io.horizondb.db.commitlog;

import java.util.concurrent.atomic.AtomicLong;

/**
 * ID generator for commit log segments.
 * 
 * @author benjamin
 * 
 */
final class IdFactory {

    /**
     * The current ID.
     */
    private static final AtomicLong nextId = new AtomicLong(System.currentTimeMillis());

    /**
     * Returns the next ID available.
     * 
     * @return the next ID available.
     */
    public static long nextId() {
        return nextId.incrementAndGet();
    }
}