June 2002
Intermediate to advanced
312 pages
9h 18m
English
Content preview from Java Management ExtensionsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
The Basic Relation Service Classes
The relation service classes, which were briefly mentioned in the previous section, are the basic classes needed to describe relationships between MBeans. In this section, we will take a closer look at these classes. The material here will serve as a reference for the next section, in which we will see how to write code to use the relation service. Examples will be provided in this section to point out some of the features of the various classes. In this section, we assume that the relation service has been created and has been given the variable name relationService. In the next section, Section 11.3, we will look at more detailed examples.
RoleInfo
The RoleInfo
class is used to describe the role that one or more MBeans (of the
same Java class) perform. RoleInfo contains the
following read-only
attributes:
-
Name The name of the role. Must be unique for any given
RelationTypeobject.-
RefMBeanClassName The Java class name of the MBean(s) that will act in the role described by this
RoleInfoobject.-
Readable Indicates whether or not information about the role can be accessed.
-
Writable Indicates whether or not information about the role can be modified.
-
MinimumDegree The lower bound on the multiplicity (size) of the number of MBeans that may perform the role. Must be less than or equal to the maximum degree.
-
MaximumDegree The upper bound on the multiplicity (size) of the number of MBeans that may perform the role. Must be greater than or equal ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.