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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » jmx » org.jboss.mx.util

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Class Diagram

Java Document (Java Doc)

java.lang .Object

org.jboss.mx.util .MBeanInstaller

MBeanInstaller

public class MBeanInstaller (Code)

MBean installer utility

This installer allows MLet to install or upgrade a mbean based on the version specified in the MLet conf file. If the mbean version is newer than the registered in the server, the installer unregisters the old mbean and then registers the new one. This management needs to store the mbean version into the MBeanRegistry in the server. When we register mbeans, however, we can't pass the metadata to MBeanServer through the standard JMX api because Both of createMBean() and registerMBean() have no extra arguments to attach the metadata. Thus we call MBeanServer.invoke() directly to set/get the internal MBean metadata. Currently version and date are stored in the mbean registry as mbean metadata. The date will be used for preparing presentaionString for this mbean info. For managment purpose, we can add any extra data to the matadata if you need.
author:
   Fusayuki Minamoto.
author:
   Juha Lindfors.
version:
   $Revision: 57200 $
version:

Revisions:
version:

20020219 Juha Lindfors:
version:

version:

Clarified the use of classloaders in the code, renaming loader to a more
version:
explicit ctxClassLoader
version:

version:

Fixed some irregularities with the install/update code -- original
version:
   implementatio was cause IndexOutOfBoundsExceptions which prevented
version:
   some replacements in valid cases. Fixing this uncovered update logic
version:
   that would replace MBeans that were not associated with versioning
version:
   information at all.
version:


version:
   The current semantics should be:
version:
1. If an MBean is registered without versioning information it can
  version:
     never be automatically replaced by another MBean (regardless of
  version:
     the versioning information in the new MBean).
  version:
2. An MBean that has a higher version number (as determined by the
  version:
     MLetVersion Comparable interface) can automatically replace an
  version:
     MBean that was registered with a lower version number.
  version:
3. An MBean without versioning info can never automatically replace
  version:
  an MBean that was registered with version.
  version:
version:

version:

Field Summary
final public static String	DATE
final public static String	VERSIONS

Constructor Summary
public	MBeanInstaller(MBeanServer server, ClassLoader ctxClassLoader, ObjectName loaderName) Create a new MBean installer instance. Parameters: server - reference to the MBean server where the new MBeans willbe registered to Parameters: ctxClassLoader - Context class loader reference which will be stored in the registry for the new MBeans.

Method Summary
public ObjectInstance	createMBean(MBeanElement element)
public ObjectInstance	deserialize(MBeanElement element)
public ObjectInstance	installMBean(MBeanElement element)
public ObjectInstance	updateMBean(MBeanElement element)

Field Detail

DATE
final public static String DATE(Code)

VERSIONS
final public static String VERSIONS(Code)

Constructor Detail

MBeanInstaller
public MBeanInstaller(MBeanServer server, ClassLoader ctxClassLoader, ObjectName loaderName) throws Exception(Code)
	Create a new MBean installer instance. Parameters: server - reference to the MBean server where the new MBeans willbe registered to Parameters: ctxClassLoader - Context class loader reference which will be stored in the registry for the new MBeans. Thisclassloader will be set as the thread contextclassloader when the MBean is invoked. Parameters: loaderName - Object name of the classloader that should beused to instantiate the newly registered MBeans.This should normally be the object name of theMLet MBean that is installing the new MBeans.

Method Detail

createMBean
public ObjectInstance createMBean(MBeanElement element) throws MBeanException, ReflectionException, InstanceNotFoundException, MalformedObjectNameException(Code)

deserialize
public ObjectInstance deserialize(MBeanElement element) throws MBeanException, ReflectionException, InstanceNotFoundException, MalformedObjectNameException(Code)

installMBean
public ObjectInstance installMBean(MBeanElement element) throws MBeanException, ReflectionException, InstanceNotFoundException, MalformedObjectNameException(Code)
	Install a mbean with mbean metadata Parameters: element - the data parsed from the Mlet file mbean instance

updateMBean
public ObjectInstance updateMBean(MBeanElement element) throws MBeanException, ReflectionException, InstanceNotFoundException, MalformedObjectNameException(Code)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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