org.wisdom.monitor.extensions.dashboard

Class CpuGaugeSet

java.lang.Object

org.wisdom.monitor.extensions.dashboard.CpuGaugeSet

All Implemented Interfaces:

com.codahale.metrics.Metric, com.codahale.metrics.MetricSet

public class CpuGaugeSet
extends Object
implements com.codahale.metrics.MetricSet

Some information about the running system.

Field Summary

Fields

Modifier and Type	Field and Description
private OperatingSystemMXBean	bean
static String	CPU_PROCESS_LOAD The key to retrieve the CPU process load.
static String	CPU_PROCESS_TIME The key to retrieve the CPU process time.
static String	CPU_SYSTEM_LOAD The key to retrieve the CPU system load.
static String	PROCESSORS The key to retrieve the number of processor.
static String	SYSTEM_LOAD_AVERAGE The key to retrieve the system load.

Constructor Summary

Constructors

Constructor and Description
CpuGaugeSet()

Method Summary

Modifier and Type	Method and Description
private Double	getCpuProcessLoad() This method uses a Sun specific class (implementation of the Operating System MX Bean.
private Long	getCpuTime() This method uses a Sun specific class (implementation of the Operating System MX Bean.
Map<String,com.codahale.metrics.Metric>	getMetrics()
private Double	getSystemCpuLoad() This method uses a Sun specific class (implementation of the Operating System MX Bean.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PROCESSORS

public static final String PROCESSORS

The key to retrieve the number of processor.

See Also:

Constant Field Values

SYSTEM_LOAD_AVERAGE

public static final String SYSTEM_LOAD_AVERAGE

The key to retrieve the system load.

See Also:

Constant Field Values

CPU_SYSTEM_LOAD

public static final String CPU_SYSTEM_LOAD

The key to retrieve the CPU system load.

See Also:

Constant Field Values

CPU_PROCESS_LOAD

public static final String CPU_PROCESS_LOAD

The key to retrieve the CPU process load.

See Also:

Constant Field Values

CPU_PROCESS_TIME

public static final String CPU_PROCESS_TIME

The key to retrieve the CPU process time.

See Also:

Constant Field Values

bean

private OperatingSystemMXBean bean

Constructor Detail

CpuGaugeSet

public CpuGaugeSet()

Method Detail

getMetrics

public Map<String,com.codahale.metrics.Metric> getMetrics()

Specified by:

getMetrics in interface com.codahale.metrics.MetricSet

Returns:

the CPU metrics. The returned map contains the following metrics: number of processors, average system load, CPU system load, CPU process load, and Process CPU time. These values are retrieved using JMX and in particular the Sun's implementation of the OperatingSystemMXBean MBean. This bean is not necessarily available. In this case -1 is returned.

getSystemCpuLoad

private Double getSystemCpuLoad()

This method uses a Sun specific class (implementation of the Operating System MX Bean.

Returns:

the CPU system load, or -1.0 if not available.

getCpuProcessLoad

private Double getCpuProcessLoad()

This method uses a Sun specific class (implementation of the Operating System MX Bean.

Returns:

the CPU process load, or -1.0 if not available.

getCpuTime

private Long getCpuTime()

This method uses a Sun specific class (implementation of the Operating System MX Bean.

Returns:

the CPU process time, or -1L if not available.