org.apache.commons.modeler
Class JndiJmx
public
class
JndiJmx
extends BaseModelMBean
implements NotificationListener
Link between JNDI and JMX. JNDI can be used for persistence ( it is
an API for storing hierarchical data and a perfect fit for that ), as
well as an alternate view of the MBean registry.
If this component is enabled, all MBeans will be registered in JNDI, and
all attributes that are set via JMX can be stored in a DirContext.
This acts as a "recorder" for creation of mbeans and attribute changes
done via JMX.
XXX How can we control ( filter ) which mbeans will be registere ? Or
attributes ?
XXX How can we get the beans and attributes loaded before jndijmx ?
The intended use:
- do whatever you want to start the application
- load JndiJmx as an mbean
- make changes via JMX. All changes are recorded
- you can use JndiJmx to save the changes in a Jndi context.
- you can use JndiJmx to load changes from a JndiContext and replay them.
The main benefit is that only changed attributes are saved, and the Jndi
layer can preserve most of the original structure of the config file. The
alternative is to override the config files with config info extracted
from the live objects - but it's very hard to save only what was actually
changed and preserve structure and comments.
Author: Costin Manolache
Hashtable attributes
protected Context componentContext
protected Context configContext
protected Context descriptorContext
Hashtable instances
private static Log log
MBeanServer mserver
public JndiJmx()
Protected constructor to require use of the factory create method.
public String dumpStatus()
public void handleNotification(Notification notification, Object handback)
public void init()
public void replay()
public void setComponentContext(Context ctx)
If a JNDI context is set, all components
will be registered in the context.
Parameters: ctx
public void setConfigContext(Context ctx)
JNDI context where attributes will be stored for persistence
public void setDescriptorContext(Context ctx)
JNDI context for component descriptors ( metadata ).
Parameters: ctx
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