Apache Commons logo Commons Pool

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.pool2 24 13 11 2 4 46.0% 67.0% 12.0% 1
org.apache.commons.pool2.impl 33 26 7 0 13 21.0% 100.0% 21.0% 1
org.apache.commons.pool2.proxy 8 7 1 0 5 12.0% 100.0% 12.0% 1

Packages

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

org.apache.commons.pool2

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 4 46.0% 67.0% 12.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.pool2.BaseKeyedPooledObjectFactory
org.apache.commons.pool2.BaseObjectPool
org.apache.commons.pool2.BasePooledObjectFactory
org.apache.commons.pool2.KeyedObjectPool
org.apache.commons.pool2.KeyedPooledObjectFactory
org.apache.commons.pool2.ObjectPool
org.apache.commons.pool2.PooledObject
org.apache.commons.pool2.PooledObjectFactory
org.apache.commons.pool2.SwallowedExceptionListener
org.apache.commons.pool2.TrackedUse
org.apache.commons.pool2.UsageTracking
org.apache.commons.pool2.PoolUtils
org.apache.commons.pool2.PoolUtils$ErodingFactor
org.apache.commons.pool2.PoolUtils$ErodingKeyedObjectPool
org.apache.commons.pool2.PoolUtils$ErodingObjectPool
org.apache.commons.pool2.PoolUtils$ErodingPerKeyKeyedObjectPool
org.apache.commons.pool2.PoolUtils$KeyedObjectPoolMinIdleTimerTask
org.apache.commons.pool2.PoolUtils$ObjectPoolMinIdleTimerTask
org.apache.commons.pool2.PoolUtils$SynchronizedKeyedObjectPool
org.apache.commons.pool2.PoolUtils$SynchronizedKeyedPooledObjectFactory
org.apache.commons.pool2.PoolUtils$SynchronizedObjectPool
org.apache.commons.pool2.PoolUtils$SynchronizedPooledObjectFactory
org.apache.commons.pool2.PoolUtils$TimerHolder
org.apache.commons.pool2.PooledObjectState
org.apache.commons.pool2.impl
org.apache.commons.pool2.proxy
java.io
java.lang
java.util
java.util.concurrent.locks

org.apache.commons.pool2.impl

Afferent Couplings Efferent Couplings Abstractness Instability Distance
0 13 21.0% 100.0% 21.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.pool2.impl.BaseGenericObjectPool
org.apache.commons.pool2.impl.BaseObjectPoolConfig
org.apache.commons.pool2.impl.DefaultPooledObjectInfoMBean
org.apache.commons.pool2.impl.EvictionPolicy
org.apache.commons.pool2.impl.GenericKeyedObjectPoolMXBean
org.apache.commons.pool2.impl.GenericObjectPoolMXBean
org.apache.commons.pool2.impl.LinkedBlockingDeque$AbstractItr
org.apache.commons.pool2.impl.AbandonedConfig
org.apache.commons.pool2.impl.BaseGenericObjectPool$Evictor
org.apache.commons.pool2.impl.DefaultEvictionPolicy
org.apache.commons.pool2.impl.DefaultPooledObject
org.apache.commons.pool2.impl.DefaultPooledObject$AbandonedObjectCreatedException
org.apache.commons.pool2.impl.DefaultPooledObjectInfo
org.apache.commons.pool2.impl.EvictionConfig
org.apache.commons.pool2.impl.EvictionTimer
org.apache.commons.pool2.impl.EvictionTimer$1
org.apache.commons.pool2.impl.EvictionTimer$PrivilegedGetTccl
org.apache.commons.pool2.impl.EvictionTimer$PrivilegedSetTccl
org.apache.commons.pool2.impl.GenericKeyedObjectPool
org.apache.commons.pool2.impl.GenericKeyedObjectPool$1
org.apache.commons.pool2.impl.GenericKeyedObjectPool$ObjectDeque
org.apache.commons.pool2.impl.GenericKeyedObjectPoolConfig
org.apache.commons.pool2.impl.GenericObjectPool
org.apache.commons.pool2.impl.GenericObjectPoolConfig
org.apache.commons.pool2.impl.InterruptibleReentrantLock
org.apache.commons.pool2.impl.LinkedBlockingDeque
org.apache.commons.pool2.impl.LinkedBlockingDeque$1
org.apache.commons.pool2.impl.LinkedBlockingDeque$DescendingItr
org.apache.commons.pool2.impl.LinkedBlockingDeque$Itr
org.apache.commons.pool2.impl.LinkedBlockingDeque$Node
org.apache.commons.pool2.impl.PoolImplUtils
org.apache.commons.pool2.impl.PooledSoftReference
org.apache.commons.pool2.impl.SoftReferenceObjectPool
None java.io
java.lang
java.lang.management
java.lang.ref
java.lang.reflect
java.security
java.text
java.util
java.util.concurrent
java.util.concurrent.atomic
java.util.concurrent.locks
javax.management
org.apache.commons.pool2

org.apache.commons.pool2.proxy

Afferent Couplings Efferent Couplings Abstractness Instability Distance
0 5 12.0% 100.0% 12.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.pool2.proxy.ProxySource
org.apache.commons.pool2.proxy.BaseProxyHandler
org.apache.commons.pool2.proxy.CglibProxyHandler
org.apache.commons.pool2.proxy.CglibProxySource
org.apache.commons.pool2.proxy.JdkProxyHandler
org.apache.commons.pool2.proxy.JdkProxySource
org.apache.commons.pool2.proxy.ProxiedKeyedObjectPool
org.apache.commons.pool2.proxy.ProxiedObjectPool
None java.lang
java.lang.reflect
java.util
net.sf.cglib.proxy
org.apache.commons.pool2

Cycles

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

There are no cyclic dependencies.

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.