如何使用Java API在Jenkins中了解Jenkins构建执行器是否空闲

用于检查从站是否在线和空闲的系统常规脚本。

import hudson.model.Nodeimport hudson.model.Slaveimport jenkins.model.JenkinsJenkins jenkins = Jenkins.instancedef jenkinsNodes =jenkins.nodesfor (Node node in jenkinsNodes) {    // Make sure slave is online    if (!node.getComputer().isOffline())     {        //Make sure that the slave busy executor number is 0.        if(node.getComputer().countBusy()==0)        {...Do somthing...        }    }}