io.micrometer.core.instrument.step.StepDouble Maven / Gradle / Ivy
/*
* Copyright 2017 VMware, 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
*
* https://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.micrometer.core.instrument.step;
import io.micrometer.core.instrument.Clock;
import java.util.concurrent.atomic.DoubleAdder;
import java.util.function.Supplier;
/**
* Subtly different from {@code com.netflix.spectator.impl.StepDouble} in that we want to
* be able to increment BEFORE rolling over the interval.
*
* @author Jon Schneider
*/
public class StepDouble extends StepValue {
private final DoubleAdder current = new DoubleAdder();
public StepDouble(Clock clock, long stepMillis) {
super(clock, stepMillis);
}
@Override
protected Supplier valueSupplier() {
return current::sumThenReset;
}
@Override
protected Double noValue() {
return 0.0;
}
public DoubleAdder getCurrent() {
return current;
}
}