Version 4.1 by Vincent Massol on 2011/05/06 14:52
 | Get and set JMX attributes |
| Type | Snippet |
| Category | |
| Developed by | Unknown |
| Rating | |
| License | Unknown |
Table of contents
Description
Shows how to use Groovy to access (get/set) JMX attributes.
Example 1: TCPPING get/set log level
Shows how to display and how to change the current log level of a JGroups Protocol (TCPPING). This allows enabling logging JGroups information in a running XWiki instance, which is useful when trying to diagnose issues in a XWiki Cluster (it uses JGroups).
{{groovy}}
import java.lang.management.ManagementFactory;
import javax.management.MBeanServer;
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
def mbean = new GroovyMBean(server, 'jgroups:type=protocol,cluster=event,protocol=TCPPING')
println "Current log level for TCPPING:"
println mbean.Level
println "Set log level to DEBUG"
mbean.Level = "debug"
{{/groovy}}
import java.lang.management.ManagementFactory;
import javax.management.MBeanServer;
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
def mbean = new GroovyMBean(server, 'jgroups:type=protocol,cluster=event,protocol=TCPPING')
println "Current log level for TCPPING:"
println mbean.Level
println "Set log level to DEBUG"
mbean.Level = "debug"
{{/groovy}}
Example 2: List all JGroups attribute values
{{groovy}}
import java.lang.management.ManagementFactory;
import javax.management.MBeanServer;
import javax.management.ObjectName;
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
def query = new ObjectName('jgroups:*')
def allNames = server.queryNames(query, null)
for(protocol in allNames) {
def mbean = new GroovyMBean(server, protocol)
println "== Config for {{{ ${protocol} }}} =="
for(attr in mbean.listAttributeNames()) {
println "* ${attr}: ${mbean.getProperty(attr)}"
}
}
{{/groovy}}
import java.lang.management.ManagementFactory;
import javax.management.MBeanServer;
import javax.management.ObjectName;
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
def query = new ObjectName('jgroups:*')
def allNames = server.queryNames(query, null)
for(protocol in allNames) {
def mbean = new GroovyMBean(server, protocol)
println "== Config for {{{ ${protocol} }}} =="
for(attr in mbean.listAttributeNames()) {
println "* ${attr}: ${mbean.getProperty(attr)}"
}
}
{{/groovy}}
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