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Application monitoring instrumentation facade

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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.spring.autoconfigure;

import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.binder.jvm.ClassLoaderMetrics;
import io.micrometer.core.instrument.binder.jvm.JvmGcMetrics;
import io.micrometer.core.instrument.binder.jvm.JvmMemoryMetrics;
import io.micrometer.core.instrument.binder.jvm.JvmThreadMetrics;

/**
 * {@link EnableAutoConfiguration Auto-configuration} for JVM metrics.
 *
 * @author Jon Schneider
 * @author Stephane Nicoll
 * @since 1.1.0
 */
@Configuration
@AutoConfigureAfter(MetricsAutoConfiguration.class)
@ConditionalOnClass(MeterRegistry.class)
@ConditionalOnBean(MeterRegistry.class)
@ConditionalOnProperty(value = "management.metrics.binders.jvm.enabled", matchIfMissing = true)
public class JvmMetricsAutoConfiguration {

    @Bean
    @ConditionalOnMissingBean
    public JvmGcMetrics jvmGcMetrics() {
        return new JvmGcMetrics();
    }

    @Bean
    @ConditionalOnMissingBean
    public JvmMemoryMetrics jvmMemoryMetrics() {
        return new JvmMemoryMetrics();
    }

    @Bean
    @ConditionalOnMissingBean
    public JvmThreadMetrics jvmThreadMetrics() {
        return new JvmThreadMetrics();
    }

    @Bean
    @ConditionalOnMissingBean
    public ClassLoaderMetrics classLoaderMetrics() {
        return new ClassLoaderMetrics();
    }

}