Metric Results

[ summary ] [ packages ] [ cycles ] [ explanations ]

The following document contains the results of a JDepend metric analysis. The various metrics are defined at the bottom of this document.

Summary

[ summary ] [ packages ] [ cycles ] [ explanations ]

Package TC CC AC Ca Ce A I D V
org.apache.commons.messagelet 13 7 6 2 11 46.0% 85.0% 31.0% 1
org.apache.commons.messagelet.impl 14 14 0 0 12 0.0% 100.0% 0.0% 1
org.apache.commons.messagelet.model 3 3 0 1 5 0.0% 83.0% 17.0% 1
org.apache.commons.messenger 22 17 5 4 12 23.0% 75.0% 2.0% 1
org.apache.commons.messenger.task 2 2 0 0 7 0.0% 100.0% 0.0% 1
org.apache.commons.messenger.tool 4 4 0 1 5 0.0% 83.0% 17.0% 1

Packages

[ summary ] [ packages ] [ cycles ] [ explanations ]

org.apache.commons.messagelet

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 11 46.0% 85.0% 31.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.messagelet.MessageDrivenObject
org.apache.commons.messagelet.MessageDrivenObjectSupport
org.apache.commons.messagelet.Messagelet
org.apache.commons.messagelet.MessageletRequest
org.apache.commons.messagelet.MessageletResponse
org.apache.commons.messagelet.MessengerMDO
 org.apache.commons.messagelet.BridgeMDO
org.apache.commons.messagelet.ConsumerThread
org.apache.commons.messagelet.DistributeBridgeMDO
org.apache.commons.messagelet.Main
org.apache.commons.messagelet.ManagerServlet
org.apache.commons.messagelet.SubscriptionManager
org.apache.commons.messagelet.XAConsumerThread
 org.apache.commons.messagelet.impl
org.apache.commons.messagelet.model
 java.io
java.lang
java.net
java.util
javax.jms
javax.servlet
javax.transaction
org.apache.commons.logging
org.apache.commons.messagelet.model
org.apache.commons.messenger
org.apache.commons.messenger.tool

org.apache.commons.messagelet.impl

Afferent Couplings Efferent Couplings Abstractness Instability Distance
0 12 0.0% 100.0% 0.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.messagelet.impl.BufferedServletInputStream
org.apache.commons.messagelet.impl.BufferedServletOutputStream
org.apache.commons.messagelet.impl.HttpMessageletRequestImpl
org.apache.commons.messagelet.impl.HttpMessageletResponseImpl
org.apache.commons.messagelet.impl.HttpServletRequestImpl
org.apache.commons.messagelet.impl.HttpServletResponseImpl
org.apache.commons.messagelet.impl.HttpSessionImpl
org.apache.commons.messagelet.impl.MessageHttpServletDispatcher
org.apache.commons.messagelet.impl.MessageServletDispatcher
org.apache.commons.messagelet.impl.MessageletRequestImpl
org.apache.commons.messagelet.impl.MessageletResponseImpl
org.apache.commons.messagelet.impl.RequestUtil
org.apache.commons.messagelet.impl.ServletRequestImpl
org.apache.commons.messagelet.impl.ServletResponseImpl
 None java.beans
java.io
java.lang
java.security
java.text
java.util
javax.jms
javax.servlet
javax.servlet.http
org.apache.commons.collections.iterators
org.apache.commons.messagelet
org.apache.commons.messenger

org.apache.commons.messagelet.model

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 5 0.0% 83.0% 17.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.messagelet.model.Subscription
org.apache.commons.messagelet.model.SubscriptionDigester
org.apache.commons.messagelet.model.SubscriptionList
 org.apache.commons.messagelet
 java.lang
java.util
javax.jms
org.apache.commons.digester
org.apache.commons.messagelet

org.apache.commons.messenger

Afferent Couplings Efferent Couplings Abstractness Instability Distance
4 12 23.0% 75.0% 2.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.messenger.Messenger
org.apache.commons.messenger.MessengerListener
org.apache.commons.messenger.MessengerListenerSupport
org.apache.commons.messenger.MessengerSupport
org.apache.commons.messenger.XACapable
 org.apache.commons.messenger.DefaultMessenger
org.apache.commons.messenger.DefaultServerSession
org.apache.commons.messenger.DefaultServerSessionPool
org.apache.commons.messenger.DefaultServerSessionPool$1
org.apache.commons.messenger.InitMessengerServlet
org.apache.commons.messenger.JNDISessionFactory
org.apache.commons.messenger.ListenerKey
org.apache.commons.messenger.Lock
org.apache.commons.messenger.MessengerDigester
org.apache.commons.messenger.MessengerManager
org.apache.commons.messenger.MessengerServlet
org.apache.commons.messenger.MessengerSession
org.apache.commons.messenger.SessionFactory
org.apache.commons.messenger.SimpleMessenger
org.apache.commons.messenger.SimpleMessenger$ThreadLocalData
org.apache.commons.messenger.XACapableAdapter
org.apache.commons.messenger.XAMessenger
 org.apache.commons.messagelet
org.apache.commons.messagelet.impl
org.apache.commons.messenger.task
org.apache.commons.messenger.tool
 java.io
java.lang
java.net
java.util
javax.jms
javax.naming
javax.servlet
javax.servlet.http
javax.transaction
javax.transaction.xa
org.apache.commons.digester
org.apache.commons.logging

org.apache.commons.messenger.task

Afferent Couplings Efferent Couplings Abstractness Instability Distance
0 7 0.0% 100.0% 0.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.messenger.task.ConsumerTask
org.apache.commons.messenger.task.ProducerTask
 None java.io
java.lang
java.util
javax.jms
org.apache.commons.messenger
org.apache.tools.ant
org.apache.tools.ant.types

org.apache.commons.messenger.tool

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 5 0.0% 83.0% 17.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.messenger.tool.Caller
org.apache.commons.messenger.tool.Consumer
org.apache.commons.messenger.tool.Producer
org.apache.commons.messenger.tool.StopWatchMessageListener
 org.apache.commons.messagelet
 java.io
java.lang
javax.jms
org.apache.commons.logging
org.apache.commons.messenger

Cycles

[ summary ] [ packages ] [ cycles ] [ explanations ]

Package Package Dependencies
org.apache.commons.messagelet org.apache.commons.messagelet.model
org.apache.commons.messagelet
org.apache.commons.messagelet.impl org.apache.commons.messagelet
org.apache.commons.messagelet.model
org.apache.commons.messagelet
org.apache.commons.messagelet.model org.apache.commons.messagelet
org.apache.commons.messagelet.model

Explanation

[ summary ] [ packages ] [ cycles ] [ explanations ]

The following explanations are for quick reference and are lifted directly from the original JDepend documentation.

Term Description
Number of Classes The number of concrete and abstract classes (and interfaces) in the package is an indicator of the extensibility of the package.
Afferent Couplings The number of other packages that depend upon classes within the package is an indicator of the package's responsibility.
Efferent Couplings The number of other packages that the classes in the package depend upon is an indicator of the package's independence.
Abstractness The ratio of the number of abstract classes (and interfaces) in the analyzed package to the total number of classes in the analyzed package. The range for this metric is 0 to 1, with A=0 indicating a completely concrete package and A=1 indicating a completely abstract package.
Instability The ratio of efferent coupling (Ce) to total coupling (Ce / (Ce + Ca)). This metric is an indicator of the package's resilience to change. The range for this metric is 0 to 1, with I=0 indicating a completely stable package and I=1 indicating a completely instable package.
Distance The perpendicular distance of a package from the idealized line A + I = 1. This metric is an indicator of the package's balance between abstractness and stability. A package squarely on the main sequence is optimally balanced with respect to its abstractness and stability. Ideal packages are either completely abstract and stable (x=0, y=1) or completely concrete and instable (x=1, y=0). The range for this metric is 0 to 1, with D=0 indicating a package that is coincident with the main sequence and D=1 indicating a package that is as far from the main sequence as possible.
Cycles Packages participating in a package dependency cycle are in a deadly embrace with respect to reusability and their release cycle. Package dependency cycles can be easily identified by reviewing the textual reports of dependency cycles. Once these dependency cycles have been identified with JDepend, they can be broken by employing various object-oriented techniques.