ActiveCluster - JDepend Source Code Analysis

ActiveCluster

##### Project Documentation

- About ActiveCluster
- Project Info
- Project Reports
  - Metrics
  - Checkstyle
  - Change Log
  - Developer Activity
  - File Activity
  - Project License
  - JavaDocs
  - JavaDoc Report
  - Source Xref
  - Test Xref
  - Unit Tests
  - Link Check Report
  - Task List
- Development Process

## Metric Results

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

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

## Summary

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

Package | TC | AC | CC | AC | EC | A | I | D
--- | --- | --- | --- | --- | --- | --- | --- | ---
org.codehaus.activecluster | 8 | 6 | 2 | 3 | 4 | 0.75 | 57% | 32%
org.codehaus.activecluster.election | 1 | 1 | 0 | 2 | 3 | 1 | 60% | 60%
org.codehaus.activecluster.election.impl | 1 | 0 | 1 | 1 | 5 | 0 | 83% | 17%
org.codehaus.activecluster.impl | 13 | 1 | 12 | 0 | 10 | 0.08 | 100% | 8%

## Packages

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

### org.codehaus.activecluster

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
3 | 4 | 75% | 57% | 32%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
Cluster ClusterFactory ClusterListener LocalNode Node Service | ClusterEvent ClusterException | org.codehaus.activecluster.election org.codehaus.activecluster.election.impl org.codehaus.activecluster.impl | java.io java.lang java.util javax.jms

### org.codehaus.activecluster.election

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
2 | 3 | 100% | 60% | 60%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
ElectionStrategy | None | org.codehaus.activecluster.election.impl org.codehaus.activecluster.impl | java.lang javax.jms org.codehaus.activecluster

### org.codehaus.activecluster.election.impl

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
1 | 5 | 0% | 83% | 17%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
None | BullyElectionStrategy | org.codehaus.activecluster.impl | java.lang java.util javax.jms org.codehaus.activecluster org.codehaus.activecluster.election

### org.codehaus.activecluster.impl

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
0 | 10 | 8% | 100% | 8%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
StateService | ActiveMQClusterFactory DefaultCluster DefaultCluster$1 DefaultClusterFactory NodeImpl NonReplicatedLocalNode ReplicatedLocalNode StateConsumer StateServiceImpl StateServiceImpl$1 StateServiceImpl$NodeEntry StateServiceStub | None | EDU.oswego.cs.dl.util.concurrent java.io java.lang java.util javax.jms org.apache.commons.logging org.codehaus.activecluster org.codehaus.activecluster.election org.codehaus.activecluster.election.impl org.codehaus.activemq

## Cycles

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

There are no cyclic dependencies.

## Explanations

[ 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.