io.micrometer.core.instrument.binder.jvm.ClassLoaderMetrics Maven / Gradle / Ivy
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/**
* 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.binder.jvm;
import io.micrometer.core.instrument.FunctionCounter;
import io.micrometer.core.instrument.Gauge;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Tag;
import io.micrometer.core.instrument.binder.BaseUnits;
import io.micrometer.core.instrument.binder.MeterBinder;
import io.micrometer.core.lang.NonNullApi;
import io.micrometer.core.lang.NonNullFields;
import java.lang.management.ClassLoadingMXBean;
import java.lang.management.ManagementFactory;
import static java.util.Collections.emptyList;
@NonNullApi
@NonNullFields
public class ClassLoaderMetrics implements MeterBinder {
private final Iterable tags;
public ClassLoaderMetrics() {
this(emptyList());
}
public ClassLoaderMetrics(Iterable tags) {
this.tags = tags;
}
@Override
public void bindTo(MeterRegistry registry) {
ClassLoadingMXBean classLoadingBean = ManagementFactory.getClassLoadingMXBean();
Gauge.builder("jvm.classes.loaded", classLoadingBean, ClassLoadingMXBean::getLoadedClassCount)
.tags(tags)
.description("The number of classes that are currently loaded in the Java virtual machine")
.baseUnit(BaseUnits.CLASSES)
.register(registry);
FunctionCounter.builder("jvm.classes.unloaded", classLoadingBean, ClassLoadingMXBean::getUnloadedClassCount)
.tags(tags)
.description("The total number of classes unloaded since the Java virtual machine has started execution")
.baseUnit(BaseUnits.CLASSES)
.register(registry);
}
}