Query MBeans

Often, you do not know the full name of an MBean in advance, but you want to query all MBeans whose ObjectNames match a given pattern. The following example returns all MBeans of a certain type on the given node:

Tip

import java.util.Set;
import javax.management.ObjectName;
import javax.management.MBeanServerConnection;
import com.sap.jmx.ObjectNameFactory;
MBeanServerConnection mbsc = getConnection ();
// build the ObjectName pattern:
// ":j2eeType=SAP_MyType,SAP_J2EEClusterNode=14418750,SAP_J2EECluster=\"\",*"
ObjectName pattern = ObjectNameFactory.getPatternForServerChildPerNode("SAP_MyType", "14418750", null);
// the query returns a set of matching ObjectNames
Set<ObjectName> names = mbsc.queryNames(pattern, null);

Another example shows a query that returns all MBeans of a certain type on all nodes. This will result in a broadcast to all cluster elements, performed by the MBean Server internally:

Tip

...
// build the ObjectName pattern:
// ":j2eeType=SAP_MyType,SAP_J2EECluster=\"\",*"
ObjectName pattern2 = ObjectNameFactory.getPatternForServerChildPerNode("SAP_MyType", null);
// the query returns a set of matching ObjectNames
Set<ObjectName> names2 = mbsc.queryNames(pattern2, null);