com.sun.enterprise.admin.monitor.stats
Class GenericStatsImpl

java.lang.Object
  com.sun.enterprise.admin.monitor.stats.GenericStatsImpl

All Implemented Interfaces:

Stats

public class GenericStatsImpl
extends Object
implements Stats

Provides for generic implementation of any Stats interface. This class facilitates composition over inheritance for all the classes that implement their specific Stats interfaces. None of them has to implement the methods defined by the Stats interface. This class implements the same interface and does that job. All that implementing classes have to do is implement the specific accessing methods in their Stats interfaces and delegate the rest to this class. This class invokes all these methods in implementing class through introspection.

Since:

S1AS8.0

Version:

$Version$

Author:

Kedar Mhaswade

Constructor Summary

GenericStatsImpl(Class statsInterface, Object statsProvider)
Constructs a new instance of this class for a given interface and its implementation.

GenericStatsImpl(String statsInterfaceName, ClassLoader loader, Object statsProvider)

GenericStatsImpl(String statsInterfaceName, Object statsProvider)

Method Summary

Statistic	getStatistic(String statisticName) Get a Statistic by name.
String[]	getStatisticNames() Returns an array of Strings which are the names of the attributes from the specific Stats submodel that this object supports.
Statistic[]	getStatistics() Returns an array containing all of the Statistic objects supported by this Stats object.

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericStatsImpl

public GenericStatsImpl(String statsInterfaceName,
                        Object statsProvider)
                 throws ClassNotFoundException

Throws:

ClassNotFoundException

GenericStatsImpl

public GenericStatsImpl(String statsInterfaceName,
                        ClassLoader loader,
                        Object statsProvider)
                 throws ClassNotFoundException

Throws:

ClassNotFoundException

GenericStatsImpl

public GenericStatsImpl(Class statsInterface,
                        Object statsProvider)

Constructs a new instance of this class for a given interface and its implementation. It is mandatory that following contract is satisfied to call this satisfactorily:

• None of the parameters are null.
• Given statsProvider implements the given statsInterface.
• Given statsInterface has to extend the @{link Stats} interface.

Note that it is expected (though not mandatory) to have a getXXX method that does not return an instance of Statistic interface.

Throws:

NullPointerException - if any of the given parameters are null

IllegalArgumentException - if the contract is not satisfied by given parameters

Method Detail

getStatistic

public Statistic getStatistic(String statisticName)

Description copied from interface: Stats

Get a Statistic by name.

Specified by:

getStatistic in interface Stats

getStatisticNames

public String[] getStatisticNames()

Description copied from interface: Stats

Returns an array of Strings which are the names of the attributes from the specific Stats submodel that this object supports. Attributes named in the list must correspond to attributes that will return a Statistic object of the appropriate type which contains valid performance data. The return value of attributes in the Stats submodel that are not included in the statisticNames list must be null. For each name in the statisticNames list there must be one Statistic with the same name in the statistics list.

Specified by:

getStatisticNames in interface Stats

getStatistics

public Statistic[] getStatistics()

Description copied from interface: Stats

Returns an array containing all of the Statistic objects supported by this Stats object.

Specified by:

getStatistics in interface Stats