Provide "nice-ness" to the current thread and/or query the current value.
|currentpriority||the name of the property whose value should be set to the current "nice-ness" level.||No|
|newpriority||the value to which the "nice-ness" level should be set. Must be a valid Java Thread priority.||No|
<nice newpriority="10"/>Set the Thread priority to 10 (highest).
<nice currentpriority="priority"/>Store the current Thread priority in the user property "priority".
<nice currentpriority="currentpriority" newpriority="1"/>
Set the current Thread priority to 1 (lowest), storing the original priority in the user property "currentpriority". This can be used to set the priority back to its original value later.