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.wikimedia.gobblin 1 1 0 3 2 0.0% 40.0% 60.000004% 1
org.wikimedia.gobblin.compression 2 2 0 1 4 0.0% 80.0% 20.0% 1
org.wikimedia.gobblin.copy 9 9 0 2 19 0.0% 90.0% 10.0% 1
org.wikimedia.gobblin.kafka 2 2 0 0 12 0.0% 100.0% 0.0% 1
org.wikimedia.gobblin.publisher 1 1 0 0 7 0.0% 100.0% 0.0% 1
org.wikimedia.gobblin.utils 2 2 0 1 1 0.0% 50.0% 50.0% 1
org.wikimedia.gobblin.writer 4 4 0 0 12 0.0% 100.0% 0.0% 1
org.wikimedia.gobblin.writer.partitioner 3 3 0 0 8 0.0% 100.0% 0.0% 1

Packages

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

org.wikimedia.gobblin

Afferent Couplings Efferent Couplings Abstractness Instability Distance
3 2 0.0% 40.0% 60.000004%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.wikimedia.gobblin.TimestampedRecord
 org.wikimedia.gobblin.kafka
org.wikimedia.gobblin.writer
org.wikimedia.gobblin.writer.partitioner
 java.lang
java.util

org.wikimedia.gobblin.compression

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 4 0.0% 80.0% 20.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.wikimedia.gobblin.compression.CompressionFactory
org.wikimedia.gobblin.compression.GzipCodec
 org.wikimedia.gobblin.writer
 java.lang
java.util
org.apache.gobblin.codec
org.apache.gobblin.compression

org.wikimedia.gobblin.copy

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 19 0.0% 90.0% 10.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.wikimedia.gobblin.copy.Kafka1ConsumerClient$1
org.wikimedia.gobblin.copy.Kafka1ConsumerClient$3
org.wikimedia.gobblin.copy.Kafka1ConsumerClient$4
org.wikimedia.gobblin.copy.Kafka1ConsumerClient$Factory
org.wikimedia.gobblin.copy.Kafka1ConsumerClient$Kafka1ConsumerRecord
org.wikimedia.gobblin.copy.KafkaSource$1
org.wikimedia.gobblin.copy.KafkaSource$Offsets
org.wikimedia.gobblin.copy.KafkaSource$WorkUnitCreator
org.wikimedia.gobblin.copy.TimePartitionedDataPublisher
 org.wikimedia.gobblin.kafka
org.wikimedia.gobblin.publisher
 com.codahale.metrics
com.google.common.base
com.google.common.collect
com.typesafe.config
java.io
java.lang
java.util
java.util.concurrent
org.apache.gobblin.configuration
org.apache.gobblin.kafka.client
org.apache.gobblin.metrics
org.apache.gobblin.source.extractor.extract.kafka
org.apache.gobblin.util
org.apache.hadoop.fs
org.apache.hadoop.fs.permission
org.apache.kafka.clients.consumer
org.apache.kafka.common
org.apache.kafka.common.record
org.slf4j

org.wikimedia.gobblin.kafka

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.wikimedia.gobblin.kafka.Kafka1TimestampedRecordExtractor
org.wikimedia.gobblin.kafka.Kafka1TimestampedRecordSource
 None com.google.common.collect
java.io
java.lang
java.util
org.apache.gobblin.configuration
org.apache.gobblin.kafka.client
org.apache.gobblin.source.extractor
org.apache.gobblin.source.extractor.extract.kafka
org.apache.kafka.common.record
org.slf4j
org.wikimedia.gobblin
org.wikimedia.gobblin.copy

org.wikimedia.gobblin.publisher

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.wikimedia.gobblin.publisher.TimePartitionedDataPublisherWithFlag
 None com.google.common.io
java.io
java.util
org.apache.gobblin.configuration
org.apache.hadoop.fs
org.slf4j
org.wikimedia.gobblin.copy

org.wikimedia.gobblin.utils

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 1 0.0% 50.0% 50.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.wikimedia.gobblin.utils.JsonStringTimestampExtractor$1
org.wikimedia.gobblin.utils.JsonStringTimestampExtractor$TimestampFormat
 org.wikimedia.gobblin.writer.partitioner
 java.lang

org.wikimedia.gobblin.writer

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.wikimedia.gobblin.writer.SimpleStringWriter
org.wikimedia.gobblin.writer.SimpleStringWriterBuilder
org.wikimedia.gobblin.writer.TimestampedRecordWriterWrapper
org.wikimedia.gobblin.writer.TimestampedStringRecordDataWriterBuilder
 None com.google.common.base
java.io
java.lang
java.util
org.apache.gobblin.compression
org.apache.gobblin.configuration
org.apache.gobblin.crypto
org.apache.gobblin.instrumented.writer
org.apache.gobblin.writer
org.slf4j
org.wikimedia.gobblin
org.wikimedia.gobblin.compression

org.wikimedia.gobblin.writer.partitioner

Afferent Couplings Efferent Couplings Abstractness Instability Distance
0 8 0.0% 100.0% 0.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.wikimedia.gobblin.writer.partitioner.JsonStringTimeBasedWriterPartitioner
org.wikimedia.gobblin.writer.partitioner.TimestampedRecordOrJsonStringTimeBasedWriterPartitioner
org.wikimedia.gobblin.writer.partitioner.TimestampedRecordTimeBasedWriterPartitioner
 None java.lang
java.util
org.apache.gobblin.configuration
org.apache.gobblin.util
org.apache.gobblin.writer.partitioner
org.slf4j
org.wikimedia.gobblin
org.wikimedia.gobblin.utils

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.