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ProxyLongHistogramBuilder.java
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ProxyLongHistogramBuilder.java
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/*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. licenses this file to you 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 co.elastic.apm.agent.embeddedotel.proxy;
import co.elastic.apm.agent.configuration.MetricsConfiguration;
import co.elastic.apm.agent.tracer.GlobalTracer;
import io.opentelemetry.api.metrics.LongHistogramBuilder;
import java.util.ArrayList;
import java.util.List;
public class ProxyLongHistogramBuilder {
private final LongHistogramBuilder delegate;
public ProxyLongHistogramBuilder(LongHistogramBuilder delegate) {
this.delegate = delegate;
//apply default bucket boundaries, they are guaranteed to be ordered
List<Double> boundaries = GlobalTracer.get().getConfig(MetricsConfiguration.class).getCustomMetricsHistogramBoundaries();
delegate.setExplicitBucketBoundariesAdvice(convertToLongBoundaries(boundaries));
}
private List<Long> convertToLongBoundaries(List<Double> boundaries) {
List<Long> result = new ArrayList<>();
for(double val : boundaries) {
long rounded = Math.round(val);
//Do not add the same boundary twice
if(rounded > 0 && (result.isEmpty() || result.get(result.size() - 1) != rounded)) {
result.add(rounded);
}
}
return result;
}
public LongHistogramBuilder getDelegate() {
return delegate;
}
public ProxyLongHistogram build() {
return new ProxyLongHistogram(delegate.build());
}
public ProxyLongHistogramBuilder setUnit(String arg0) {
delegate.setUnit(arg0);
return this;
}
public ProxyLongHistogramBuilder setDescription(String arg0) {
delegate.setDescription(arg0);
return this;
}
public ProxyLongHistogramBuilder setExplicitBucketBoundariesAdvice(List<Long> bucketBoundaries) {
delegate.setExplicitBucketBoundariesAdvice(bucketBoundaries);
return this;
}
}