io.micrometer.wavefront.WavefrontDistributionSummary Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of micrometer-registry-wavefront Show documentation

Application monitoring instrumentation facade

There is a newer version: 1.14.1

Show newest version

/**
 * Copyright 2019 Pivotal Software, 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.wavefront;

import com.wavefront.sdk.entities.histograms.WavefrontHistogramImpl;
import io.micrometer.core.instrument.Clock;
import io.micrometer.core.instrument.cumulative.CumulativeDistributionSummary;
import io.micrometer.core.instrument.distribution.DistributionStatisticConfig;
import io.micrometer.core.lang.Nullable;

import java.util.Collections;
import java.util.List;

/**
 * DistributionSummary that sends histogram distributions to Wavefront using WavefrontHistogramImpl.
 *
 * @author Han Zhang
 */
class WavefrontDistributionSummary extends CumulativeDistributionSummary {
    @Nullable
    private final WavefrontHistogramImpl delegate;

    WavefrontDistributionSummary(Id id, Clock clock,
                                 DistributionStatisticConfig distributionStatisticConfig,
                                 double scale) {
        super(id, clock, distributionStatisticConfig, scale, false);
        delegate = distributionStatisticConfig.isPublishingHistogram() ?
            new WavefrontHistogramImpl(clock::wallTime) : null;
    }

    @Override
    protected void recordNonNegative(double amount) {
        super.recordNonNegative(amount);
        if (delegate != null) {
            delegate.update(amount);
        }
    }

    List flushDistributions() {
        if (delegate == null) {
            return Collections.emptyList();
        } else {
            return delegate.flushDistributions();
        }
    }

    boolean isPublishingHistogram() {
        return delegate != null;
    }
}