hyracks-control/hyracks-control-common/src/main/java/edu/uci/ics/hyracks/control/common/job/profiling/counters/Counter.java

/*
 * Copyright 2009-2010 by The Regents of the University of California
 * 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 from
 * 
 *     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 edu.uci.ics.hyracks.control.common.job.profiling.counters;

import java.util.concurrent.atomic.AtomicLong;

import edu.uci.ics.hyracks.api.job.profiling.counters.ICounter;

public class Counter implements ICounter {
    private final String name;
    private final AtomicLong counter;

    public Counter(String name) {
        this.name = name;
        counter = new AtomicLong();
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public long update(long delta) {
        return counter.addAndGet(delta);
    }

    @Override
    public long set(long value) {
        long oldValue = counter.get();
        counter.set(value);
        return oldValue;
    }

    @Override
    public long get() {
        return counter.get();
    }
}