com.netflix.spectator.sidecar.SidecarGauge Maven / Gradle / Ivy
/*
* Copyright 2014-2022 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.sidecar;
import com.netflix.spectator.api.Gauge;
import com.netflix.spectator.api.Id;
/**
* Gauge that writes updates in format compatible with SpectatorD.
*/
class SidecarGauge extends SidecarMeter implements Gauge {
private final SidecarWriter writer;
/** Create a new instance. */
SidecarGauge(Id id, SidecarWriter writer) {
super(id, 'g');
this.writer = writer;
}
@Override public void set(double v) {
writer.write(idString, v);
}
@Override public double value() {
return Double.NaN;
}
}