A monitorable object is a component, subcomponent, or service that can be monitored. Enterprise Server uses a tree structure to track monitorable objects. Because the tree is dynamic, the tree changes as components of the Enterprise Server instance are added or removed.
In the tree, a monitorable object can have child objects (nodes) that represent exactly what can be monitored for that object. All child objects are addressed using the dot (.) character as a separator. These constructed names are referred to as dotted names.
The following are monitorable objects for the instance server:
server.applications server.http-service server.jvm server.web
Dotted names can also address specific attributes in monitorable objects. For example, the jvm type has a memory attribute called maxheapsize-count. The following dotted name addresses the attribute:
Although an object is monitorable, it is not necessarily being monitored. For instructions on activating monitoring, see Configuring Monitoring.
Each monitorable object has a hierarchical tree structure. In the tree, a replaceable such as *statistics represents the name of the attribute that you want to show statistics for.
This section shows the node tree hierarchies of the following monitorable objects:
The applications tree contains the following nodes:
server.applications application-name virtual-server request *statistic
An example dotted name might be server.applications.hello.server.request.maxtime-count. For available attributes, see Applications Statistics.
The http-service tree contains the following nodes:
server.http-service virtual-server request *statistic _asadmin request *statistic
An example dotted name might be server.http-service.virtual-server1.request.requestcount-count. For available attributes, see HTTP Service Statistics.
The jvm tree contains the following nodes:
server.jvm class-loading-system compilation-system garbage-collectors memory operating-system runtime
An example dotted name might be server.jvm.memory.maxheapsize-count. For available attributes, see Java Virtual Machine (JVM) Statistics.
The web tree contains the following nodes:
server.web jsp *statistic servlet *statistic session *statistic request *statistic
An example dotted name might be server.web.servlet.activeservletsloadedcount-count. For available attributes, see Web Module Common Statistics.