By Marc Fleury, Visit Amazon's Juha Lindfors Page, search results, Learn about Author Central, Juha Lindfors, , The JBoss Group
JMX starts off through offering the JMX specification and its structure. The booklet fast strikes in the course of the specification, delivering examples of JMX integration with J2EE functions. the ultimate element of the ebook provides JMX administration and management practices for a number of J2EE structures and scenarios.
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Additional info for JMX: Managing J2EE with Java Management Extensions
Managing users is a common administrative task in many environments. You will define five attributes for the management interface of the user object. First, the user has a read -only attribute ID. The ID represents a unique identifier for this particular user, such as a primary key in the database. You will also define read-write attributes Name and Address. These two string attributes can be used to store the user's name and address. -42- Bought to you by Team-FLY® JMX: Managing J2EE with Java™ Management Extensions Chapter 3 public long getID(); public String getName(); public void setName(String name); public String getAddress(); public void setAddress(String address); To demonstrate the use of arrays, define an array-based attribute PhoneNumbers.
Declaring two accessor methods for attributes that differ in capitalization will lead to two separate MBean attributes exposed by the agent. Management Operations Management operations for Standard MBeans include all the methods declared in the MBean interface that are not recognized by the agent as being either a read or write method to an attribute. The operations don't have to follow any specific naming rules as long as they do not intervene with the management attribute naming conventions. The management operations can have return values.
The RuntimeErrorException implements a getRuntimeError() method for retrieving the error thrown by the MBean. The methods in the MBeanServer interface used for accessing the MBeans, such as setAttribute(), getAttribute() and invoke(), declare the checked exception class MBeanException to be thrown, and, therefore, require a try batch block in the management client. In the exception handling code, the client can extract the actual target exception and react accordingly. Standard MBean Example So far, you have learned several details about Standard MBeans, and now it is time to put that knowledge into practice with a code example.
JMX: Managing J2EE with Java Management Extensions by Marc Fleury, Visit Amazon's Juha Lindfors Page, search results, Learn about Author Central, Juha Lindfors, , The JBoss Group