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The engine API for nosqlbench; Provides the interfaces needed to build internal modules for the nosqlbench core engine

There is a newer version: 5.17.0

/*
 *
 *    Copyright 2016 jshook
 *    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.nosqlbench.engine.api.activityapi.cyclelog.buffers;

import java.util.ArrayList;
import java.util.List;

/**
 * This is a lightweight buffer implementation that allows for buffer
 * flipping and callbacks when the buffer is full.
 * @param  The type held in this buffer
 */
public abstract class Buffer {

    private int position;
    private int limit;
    protected ArrayList data;

    public Buffer(int size) {
        data = new ArrayList<>(size);
        this.limit=size;
    }

    protected void onFull() {
    }

    protected abstract int compare(T one, T other);

    public int remaining() {
        return limit-position;
    }

    public Buffer put(T element) {
        data.add(element);
        if (data.size()==limit) {
            onFull();
        }
        return this;
    }

//    @Override
//    public int compareTo(Buffer other) {
//        int diff = Integer.compare(this.data.size(), other.data.size());
//        if (diff!=0) return diff;
//
//        for (int i = 0; i < data.size(); i++) {
//            diff = data.get(i).compareTo(other.data.get(i));
//            if (diff!=0) {
//                return diff;
//            }
//        }
//        return 0;
//    }

    public List getFlippedData() {
        return data;
    }

    @Override
    public String toString() {
        return "position=" + this.position + ", limit=" + this.limit + ", capacity=" + (data!=null ? data.size() : "NULLDATA");
    }
}