com.netflix.spectator.api.DefaultCounter Maven / Gradle / Ivy
/**
* Copyright 2015 Netflix, Inc.
*
* 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 com.netflix.spectator.api;
import java.util.Collections;
import java.util.concurrent.atomic.AtomicLong;
/** Counter implementation for the default registry. */
final class DefaultCounter implements Counter {
private final Clock clock;
private final Id id;
private final AtomicLong count;
/** Create a new instance. */
DefaultCounter(Clock clock, Id id) {
this.clock = clock;
this.id = id;
this.count = new AtomicLong(0L);
}
@Override public Id id() {
return id;
}
@Override public boolean hasExpired() {
return false;
}
@Override public Iterable measure() {
long now = clock.wallTime();
long v = count.get();
return Collections.singleton(new Measurement(id, now, v));
}
@Override public void increment() {
count.incrementAndGet();
}
@Override public void increment(long amount) {
count.addAndGet(amount);
}
@Override public long count() {
return count.get();
}
}