package com.codahale.metrics.jvm;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.Metric;
import com.codahale.metrics.MetricSet;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.util.Collections;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
public class JvmAttributeGaugeSet implements MetricSet {
private final RuntimeMXBean runtime;
public JvmAttributeGaugeSet() {
this(ManagementFactory.getRuntimeMXBean());
}
public JvmAttributeGaugeSet(RuntimeMXBean runtime) {
this.runtime = runtime;
}
@Override
public Map<String, Metric> getMetrics() {
final Map<String, Metric> gauges = new HashMap<>();
gauges.put("name", (Gauge<String>) runtime::getName);
gauges.put("vendor", (Gauge<String>) () -> String.format(Locale.US,
"%s %s %s (%s)",
runtime.getVmVendor(),
runtime.getVmName(),
runtime.getVmVersion(),
runtime.getSpecVersion()));
gauges.put("uptime", (Gauge<Long>) runtime::getUptime);
return Collections.unmodifiableMap(gauges);
}
}