[CONF] Apache Qpid: Object MBean (page created)

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Page Created : qpid : Object MBean Object MBean has been created by Andrea Gazzarini (Feb 23, 2009). Content: Object MBean Description Object Name Attributes Operations getAttribute setAttribute invoke Notifications Description QMan JMX representation of a Qpid domain object exposed for management / monitoring. Note that there will be an object MBean for each management object on Qpid. This chapter refers to the abstract interface that object will have. Object Name Q-MAN:brokerId=<BROKER_ID>,type=Object,package=<PACKAGE_NAME>,class=<CLASS_NAME>,objectId=<OBJECT_ID> where : Name Description Example Q-MAN QMan management domain. This is a fixed value. N.A. BROKER_ID Broker identifier. This is a UUID assigned to each connected broker. Basically it indicates the (broker) owner of this object. 5004341d-7f3e-444a-b240-7d48030599f9 PACKAGE_NAME The package name. A package is a grouping of class definitions that are related to a single software component. The package concept is used to extend the management schema beyond just the QPID software components. org.apache.qpid.broker CLASS_NAME The class name. A class is a type definition for a manageable object. queue, session, connection Attributes Object MBean attributes can be classifiled under two categories : Properties : typed members of object (that is, of its class definition) which represent a configurable attribute of the class. In general, properties don't change frequently or may not change at all; Statistics : typed members of object(that is, of its class definition) which represents an instrumentation attribute of the class. Statistics are always read-only in nature and tend to change rapidly. The JMX interface of an object MBean lets you retrieve attributes metadata using the standard JMX API. The following example is showing that. Example : retrieving attributes metadata public class Example { public static void main(String[] args) throws Exception { MBeanServer server = ManagementFactory.getPlatformMBeanServer(); // Suppose the following is an object name associated with an existing managed domain instance. ObjectName objectName = ...; MBeanInfo mbeanMetadata = server.getMBeanInfo(objectName); // List all attributes (metadata, not values) for (MBeanAttributeInfo attribute : mbeanMetadata.getAttributes()) { System.out.println("Name : "+attribute.getName()); System.out.println("Description : "+attribute.getDescription()); System.out.println("Type : "+attribute.getType()); System.out.println("Is Readable : "+attribute.isReadable()); System.out.println("Is Writable : "+attribute.isWritable()); } } } Operations getAttribute setAttribute invoke Operation Name Description Return Type Argument Name Description Type Nullable Note Example Notifications N.A.

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