spark JVMCPUSource 源码
spark JVMCPUSource 代码
文件路径：/core/src/main/scala/org/apache/spark/metrics/source/JVMCPUSource.scala
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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 org.apache.spark.metrics.source
import java.lang.management.ManagementFactory
import com.codahale.metrics.{Gauge, MetricRegistry}
import javax.management.{MBeanServer, ObjectName}
import scala.util.control.NonFatal
private[spark] class JVMCPUSource extends Source {
override val metricRegistry = new MetricRegistry()
override val sourceName = "JVMCPU"
// Dropwizard/Codahale metrics gauge measuring the JVM process CPU time.
// This Gauge will try to get and return the JVM Process CPU time or return -1 otherwise.
// The CPU time value is returned in nanoseconds.
// It will use proprietary extensions such as com.sun.management.OperatingSystemMXBean or
// com.ibm.lang.management.OperatingSystemMXBean, if available.
metricRegistry.register(MetricRegistry.name("jvmCpuTime"), new Gauge[Long] {
val mBean: MBeanServer = ManagementFactory.getPlatformMBeanServer
val name = new ObjectName("java.lang", "type", "OperatingSystem")
override def getValue: Long = {
try {
// return JVM process CPU time if the ProcessCpuTime method is available
mBean.getAttribute(name, "ProcessCpuTime").asInstanceOf[Long]
} catch {
case NonFatal(_) => -1L
}
}
})
}
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