org.transitime.monitoring

Class SystemMemoryMonitor

java.lang.Object

org.transitime.monitoring.MonitorBase

org.transitime.monitoring.SystemMemoryMonitor

public class SystemMemoryMonitor
extends MonitorBase

For monitoring CPU, available memory, and available disk space.

Note: Linux will use a great deal of RAM for caching and such when memory is available. Therefore most of the time the free memory will be quite low. But this is OK since the operating system will give up the RAM being used for caching and such if a process needs it. Therefore the allowable free memory should be set to quite a low value.

Author:

SkiBu Smith

Constructor Summary

Constructors

Constructor and Description
SystemMemoryMonitor(EmailSender emailSender, java.lang.String agencyId) Simple constructor

Method Summary

Modifier and Type	Method and Description
static java.lang.Object	getOperatingSystemValue(java.lang.String methodName) Gets an operating system value via reflection.

Methods inherited from class org.transitime.monitoring.MonitorBase

checkAndNotify, getMessage, recipientsGlobal

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemMemoryMonitor

public SystemMemoryMonitor(EmailSender emailSender,
                           java.lang.String agencyId)

Simple constructor

Parameters:

emailSender -

agencyId -

Method Detail

getOperatingSystemValue

public static java.lang.Object getOperatingSystemValue(java.lang.String methodName)

Gets an operating system value via reflection. Yes, this is a rather obtuse way of getting such values but it appears to work.

Parameters:

methodName - Name of the special internal com.sun.management.OperatingSystemMXBean method to call

Returns:

The result from invoking the specified method