com.sun.appserv.management.helper
Class Helper

java.lang.Object
  com.sun.appserv.management.helper.Helper

Direct Known Subclasses:

DeployedItemHelper, LoggingHelper, StatefulLoggingHelper

public class Helper
extends Object

Base class for Helpers, useable alone as well.

Field Summary

protected BulkAccess	mBulkAccess
protected DomainRoot	mDomainRoot
protected QueryMgr	mQueryMgr

Constructor Summary

Helper(AMX proxy)

Method Summary

Set<ObjectName>	filterByAttributeValue(Set<ObjectName> objectNameSet, String attributeName, Object valueToMatch) Filter ObjectNames based on the value of a particular Attribute.
DomainRoot	getDomainRoot()
protected <T extends AMX> Set<T>	propsQuery(String props)
protected <T extends AMX> Set<T>	propsQuery(String props1, String props2)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mDomainRoot

protected final DomainRoot mDomainRoot

mQueryMgr

protected final QueryMgr mQueryMgr

mBulkAccess

protected final BulkAccess mBulkAccess

Constructor Detail

Helper

public Helper(AMX proxy)

Method Detail

getDomainRoot

public DomainRoot getDomainRoot()

propsQuery

protected <T extends AMX> Set<T> propsQuery(String props)

propsQuery

protected <T extends AMX> Set<T> propsQuery(String props1,
                                            String props2)

filterByAttributeValue

public Set<ObjectName> filterByAttributeValue(Set<ObjectName> objectNameSet,
                                              String attributeName,
                                              Object valueToMatch)

Filter ObjectNames based on the value of a particular Attribute. The value may be null or anything else. This is essentially a crude form of using the QueryMgr. A value which is a Class object succeeds if the result is an object whose class is assignable to the specfied class. Typically this is used to detect a thrown Exception.

For example, to select all MBeans which have a [bB]oolean Attribute named "Enabled", which is set to true, call:

filterByAttributeValue( objectNameSet, "Enabled", Boolean.TRUE)

The query for the Attribute value is performed as a bulk operation; thus this routine may be used with confidence that it is fast.

Parameters:

objectNameSet - Set of ObjectName

attributeName -

valueToMatch - an Object whose value must be null, or equals() to the result

Returns:

Set of ObjectName which have Enabled flag matching