Geneos - how to round off a decimal number in JMX plugin without using Custom Format Masks?

In this example, we are trying to capture version numbers from the MBeans under java.lang:type=Runtime. The values for ManagementSpecVersion and SpecVersion are 1.2 and 1.8 respectively in our case.

Case 1: Round down a decimal number
The original value can be represented as $1.SpecVersion. To round down the value, the logic is take the value and minus the remainder of itself divided by 1.

$1.SpecVersion - $1.SpecVersion % 1

Case 2: Round off to the nearest integer
A trick is used here to add 0.5 to the original value, then perform the Round Down calculation as case 1. The result would effectively be rounding off to the nearest integer.

($1.SpecVersion + 0.5) - ($1.SpecVersion + 0.5) % 1

Below is the Active Console output showing the original and rounded values.

The sampler configuration in XML format has been attached as reference.

Further Reading

• JMX Plugin Documentation, section Arithmetic Expression Support