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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.node.admin.container.metrics;
/**
* @author freva
*/
public class Counter implements MetricValue {
private final Object lock = new Object();
private long value = 0;
public void increment() {
add(1L);
}
public void add(long n) {
synchronized (lock) {
value += n;
}
}
@Override
public Number getValue() {
synchronized (lock) {
return value;
}
}
}
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