Smart Plug-in for WebLogic Server User's Guide

5-8

Chapter 5: WebLogic Server SPI User Defined Metrics

Introduction to User Defined Metrics

More than one metric source element (MBean and/or Calculation)maybe

indicatedinaMetric element. Each metric source element is scanned for a

FromVersion or ToVersion child element to determine which metric source

element to use for the version of the application server being monitored. The

following algorithm is used for determining what application server version is

supported by each metric source element within the Metric element.

1. If a FromVersion element is not present, no lower limit exists to the server

versions supported by this metric.

2. If a FromVersion element is present, the server attribute indicates the

lowest server version supported by this metric. If an update attribute exists,

it additionally qualifies the lowest server version supported by specifying

the lowest service pack or patch supported for that version.

3. If a ToVersion element is not present, no upper limit exists to the server

versions supported by this metric.

4. If a ToVersion tag is present, the server attribute indicates the highest server

version supported by this metric. If an update attribute exists, it additionally

qualifies the server version supported by specifying the highest service pack

or patch supported for that version.

<!ELEMENT FromVersion (EMPTY)>

<!ELEMENT ToVersion (EMPTY)>

<!ATTLIST FromVersion server CDATA #REQUIRED

update CDATA "*">

<!ATTLIST ToVersion server CDATA #REQUIRED

update CDATA "*">

FromVersion and ToVersion element attributes are described in the following

table.

Attribute Type Required Default Description

server numeric

string

yes none Specifies a primary server version;

for example,