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.giraph.examples | 85 | 80 | 5 | 0 | 30 | 6.0% | 100.0% | 6.0% | 1 |
| org.apache.giraph.examples.block_app | 4 | 4 | 0 | 0 | 9 | 0.0% | 100.0% | 0.0% | 1 |
| org.apache.giraph.examples.io.formats | 2 | 2 | 0 | 0 | 12 | 0.0% | 100.0% | 0.0% | 1 |
| org.apache.giraph.examples.scc | 8 | 8 | 0 | 0 | 14 | 0.0% | 100.0% | 0.0% | 1 |
| org.apache.giraph.examples.utils | 2 | 2 | 0 | 2 | 4 | 0.0% | 67.0% | 33.0% | 1 |
Packages
[ summary ] [ packages ] [ cycles ] [ explanations ]org.apache.giraph.examples
| Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance |
|---|---|---|---|---|
| 0 | 30 | 6.0% | 100.0% | 6.0% |
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages |
|---|---|---|---|
| org.apache.giraph.examples.Algorithm org.apache.giraph.examples.GeneratedEdgeReader org.apache.giraph.examples.GeneratedVertexReader org.apache.giraph.examples.RandomWalkComputation org.apache.giraph.examples.SimpleLongDoubleDoubleDoubleIdentityComputation |
org.apache.giraph.examples.AggregatorsTestComputation org.apache.giraph.examples.AggregatorsTestComputation$AggregatorsTestMasterCompute org.apache.giraph.examples.AggregatorsTestComputation$SimpleEdgeInputFormat org.apache.giraph.examples.AggregatorsTestComputation$SimpleEdgeReader org.apache.giraph.examples.AggregatorsTestComputation$SimpleVertexInputFormat org.apache.giraph.examples.AggregatorsTestComputation$SimpleVertexReader org.apache.giraph.examples.BrachaTouegDeadlockComputation org.apache.giraph.examples.ConnectedComponentsComputation org.apache.giraph.examples.IdentityComputation org.apache.giraph.examples.LongDoubleDoubleTextInputFormat org.apache.giraph.examples.LongDoubleDoubleTextInputFormat$LongDoubleDoubleDoubleVertexReader org.apache.giraph.examples.LongDoubleFloatTextInputFormat org.apache.giraph.examples.LongDoubleFloatTextInputFormat$LongDoubleFloatVertexReader org.apache.giraph.examples.LongDoubleNullTextInputFormat org.apache.giraph.examples.LongDoubleNullTextInputFormat$LongDoubleNullDoubleVertexReader org.apache.giraph.examples.MaxComputation org.apache.giraph.examples.NormalizingLongDoubleDoubleTextInputFormat org.apache.giraph.examples.NormalizingLongDoubleDoubleTextInputFormat$NormalizingLongDoubleDoubleDoubleVertexReader org.apache.giraph.examples.PageRankComputation org.apache.giraph.examples.PageRankWithKryoSimpleWritable org.apache.giraph.examples.PageRankWithKryoSimpleWritable$DoubleMaxWrapperAggregator org.apache.giraph.examples.PageRankWithKryoSimpleWritable$DoubleMinWrapperAggregator org.apache.giraph.examples.PageRankWithKryoSimpleWritable$EdgeValue org.apache.giraph.examples.PageRankWithKryoSimpleWritable$MessageValue org.apache.giraph.examples.PageRankWithKryoSimpleWritable$PageRankWithKryoMasterCompute org.apache.giraph.examples.PageRankWithKryoSimpleWritable$PageRankWithKryoVertexInputFormat org.apache.giraph.examples.PageRankWithKryoSimpleWritable$PageRankWithKryoVertexReader org.apache.giraph.examples.PageRankWithKryoSimpleWritable$PageRankWithKryoWorkerContext org.apache.giraph.examples.PageRankWithKryoSimpleWritable$VertexValue org.apache.giraph.examples.RandomWalkVertexMasterCompute org.apache.giraph.examples.RandomWalkWithRestartComputation org.apache.giraph.examples.RandomWalkWorkerContext org.apache.giraph.examples.SimpleAggregatorWriter org.apache.giraph.examples.SimpleCheckpoint org.apache.giraph.examples.SimpleCheckpoint$SimpleCheckpointComputation org.apache.giraph.examples.SimpleCheckpoint$SimpleCheckpointVertexMasterCompute org.apache.giraph.examples.SimpleCheckpoint$SimpleCheckpointVertexWorkerContext org.apache.giraph.examples.SimpleCombinerComputation org.apache.giraph.examples.SimpleFailComputation org.apache.giraph.examples.SimpleInDegreeCountComputation org.apache.giraph.examples.SimpleMasterComputeComputation org.apache.giraph.examples.SimpleMasterComputeComputation$SimpleMasterCompute org.apache.giraph.examples.SimpleMasterComputeComputation$SimpleMasterComputeWorkerContext org.apache.giraph.examples.SimpleMsgComputation org.apache.giraph.examples.SimpleMutateGraphComputation org.apache.giraph.examples.SimpleMutateGraphComputation$SimpleMutateGraphVertexWorkerContext org.apache.giraph.examples.SimpleOutDegreeCountComputation org.apache.giraph.examples.SimplePageRankComputation org.apache.giraph.examples.SimplePageRankComputation$SimplePageRankMasterCompute org.apache.giraph.examples.SimplePageRankComputation$SimplePageRankVertexInputFormat org.apache.giraph.examples.SimplePageRankComputation$SimplePageRankVertexOutputFormat org.apache.giraph.examples.SimplePageRankComputation$SimplePageRankVertexOutputFormat$SimplePageRankVertexWriter org.apache.giraph.examples.SimplePageRankComputation$SimplePageRankVertexReader org.apache.giraph.examples.SimplePageRankComputation$SimplePageRankWorkerContext org.apache.giraph.examples.SimpleShortestPathsComputation org.apache.giraph.examples.SimpleSuperstepComputation org.apache.giraph.examples.SimpleSuperstepComputation$SimpleSuperstepVertexInputFormat org.apache.giraph.examples.SimpleSuperstepComputation$SimpleSuperstepVertexOutputFormat org.apache.giraph.examples.SimpleSuperstepComputation$SimpleSuperstepVertexOutputFormat$SimpleSuperstepVertexWriter org.apache.giraph.examples.SimpleSuperstepComputation$SimpleSuperstepVertexReader org.apache.giraph.examples.SimpleTextVertexOutputFormat org.apache.giraph.examples.SimpleTextVertexOutputFormat$1 org.apache.giraph.examples.SimpleTextVertexOutputFormat$SimpleTextVertexWriter org.apache.giraph.examples.SimpleTriangleClosingComputation org.apache.giraph.examples.SimpleTriangleClosingComputation$IntArrayListWritable org.apache.giraph.examples.SimpleTriangleClosingComputation$Pair org.apache.giraph.examples.SimpleVertexWithWorkerContext org.apache.giraph.examples.SimpleVertexWithWorkerContext$EmitterWorkerContext org.apache.giraph.examples.SimpleVertexWithWorkerContext$SimpleComputation org.apache.giraph.examples.TestComputationStateComputation org.apache.giraph.examples.TestComputationStateComputation$TestComputationStateWorkerContext org.apache.giraph.examples.VerifyMessage org.apache.giraph.examples.VerifyMessage$VerifiableMessage org.apache.giraph.examples.VerifyMessage$VerifyMessageComputation org.apache.giraph.examples.VerifyMessage$VerifyMessageComputation$VerifyMessageVertexWorkerContext org.apache.giraph.examples.VerifyMessage$VerifyMessageMasterCompute org.apache.giraph.examples.VertexWithDoubleValueDoubleEdgeTextOutputFormat org.apache.giraph.examples.VertexWithDoubleValueDoubleEdgeTextOutputFormat$VertexWithDoubleValueWriter org.apache.giraph.examples.VertexWithDoubleValueNullEdgeTextOutputFormat org.apache.giraph.examples.VertexWithDoubleValueNullEdgeTextOutputFormat$VertexWithDoubleValueWriter |
None | com.google.common.base com.google.common.collect java.io java.lang java.lang.annotation java.nio.charset java.util java.util.concurrent.atomic java.util.regex org.apache.commons.cli org.apache.giraph.aggregators org.apache.giraph.bsp org.apache.giraph.conf org.apache.giraph.edge org.apache.giraph.examples.utils org.apache.giraph.graph org.apache.giraph.io org.apache.giraph.io.formats org.apache.giraph.job org.apache.giraph.master org.apache.giraph.utils org.apache.giraph.worker org.apache.giraph.writable.kryo org.apache.hadoop.conf org.apache.hadoop.filecache org.apache.hadoop.fs org.apache.hadoop.io org.apache.hadoop.mapreduce org.apache.hadoop.util org.apache.log4j |
org.apache.giraph.examples.block_app
| Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance |
|---|---|---|---|---|
| 0 | 9 | 0.0% | 100.0% | 0.0% |
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages |
|---|---|---|---|
| None | org.apache.giraph.examples.block_app.SimpleMigrationMasterBlockFactory org.apache.giraph.examples.block_app.SimpleMigrationMasterBlockFactory$SimpleMigrationMasterComputation org.apache.giraph.examples.block_app.SimpleMigrationMasterBlockFactory$SimpleMigrationMasterCompute org.apache.giraph.examples.block_app.SimpleMigrationMasterBlockFactory$SimpleMigrationMasterWorkerContext |
None | java.io java.lang org.apache.giraph.aggregators org.apache.giraph.block_app.framework.block org.apache.giraph.block_app.migration org.apache.giraph.conf org.apache.giraph.graph org.apache.hadoop.io org.apache.log4j |
org.apache.giraph.examples.io.formats
| Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance |
|---|---|---|---|---|
| 0 | 12 | 0.0% | 100.0% | 0.0% |
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages |
|---|---|---|---|
| None | org.apache.giraph.examples.io.formats.BrachaTouegDeadlockInputFormat org.apache.giraph.examples.io.formats.BrachaTouegDeadlockInputFormat$JsonLongLongLongLongVertexReader |
None | com.google.common.collect java.io java.lang java.util org.apache.giraph.edge org.apache.giraph.examples.utils org.apache.giraph.graph org.apache.giraph.io org.apache.giraph.io.formats org.apache.hadoop.io org.apache.hadoop.mapreduce org.json |
org.apache.giraph.examples.scc
| Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance |
|---|---|---|---|---|
| 0 | 14 | 0.0% | 100.0% | 0.0% |
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages |
|---|---|---|---|
| None | org.apache.giraph.examples.scc.SccComputation org.apache.giraph.examples.scc.SccComputation$1 org.apache.giraph.examples.scc.SccLongLongNullTextInputFormat org.apache.giraph.examples.scc.SccLongLongNullTextInputFormat$LongLongNullVertexReader org.apache.giraph.examples.scc.SccPhaseMasterCompute org.apache.giraph.examples.scc.SccPhaseMasterCompute$1 org.apache.giraph.examples.scc.SccPhaseMasterCompute$Phases org.apache.giraph.examples.scc.SccVertexValue |
None | com.google.common.collect it.unimi.dsi.fastutil.longs java.io java.lang java.util java.util.regex org.apache.giraph.aggregators org.apache.giraph.edge org.apache.giraph.graph org.apache.giraph.io org.apache.giraph.io.formats org.apache.giraph.master org.apache.hadoop.io org.apache.hadoop.mapreduce |
org.apache.giraph.examples.utils
| Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance |
|---|---|---|---|---|
| 2 | 4 | 0.0% | 67.0% | 33.0% |
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages |
|---|---|---|---|
| None | org.apache.giraph.examples.utils.BrachaTouegDeadlockMessage org.apache.giraph.examples.utils.BrachaTouegDeadlockVertexValue |
org.apache.giraph.examples org.apache.giraph.examples.io.formats |
java.io java.lang java.util org.apache.hadoop.io |
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. |