microsoft / kafka
Conditional Complexity

The distribution of complexity of units (measured with McCabe index).

Intro
  • Conditional complexity (also called cyclomatic complexity) is a term used to measure the complexity of software. The term refers to the number of possible paths through a program function. A higher value ofter means higher maintenance and testing costs (infosecinstitute.com).
  • Conditional complexity is calculated by counting all conditions in the program that can affect the execution path (e.g. if statement, loops, switches, and/or operators, try and catch blocks...).
  • Conditional complexity is measured at the unit level (methods, functions...).
  • Units are classified in four categories based on the measured McCabe index: 1-5 (simple units), 6-10 (medium complex units), 11-25 (complex units), 26+ (very complex units).
Learn more...
Conditional Complexity Overall
  • There are 11,473 units with 99,787 lines of code in units (69.4% of code).
    • 1 very complex units (179 lines of code)
    • 18 complex units (2,073 lines of code)
    • 192 medium complex units (9,901 lines of code)
    • 620 simple units (17,003 lines of code)
    • 10,642 very simple units (70,631 lines of code)
<1% | 2% | 9% | 17% | 70%
Legend:
51+
26-50
11-25
6-10
1-5
Alternative Visuals
Conditional Complexity per Extension
51+
26-50
11-25
6-10
1-5
java<1% | 1% | 6% | 14% | 76%
scala0% | 2% | 17% | 23% | 57%
py0% | 0% | 23% | 33% | 42%
Conditional Complexity per Logical Component
primary logical decomposition
51+
26-50
11-25
6-10
1-5
connect/api7% | 11% | 11% | 9% | 59%
core/src0% | 2% | 17% | 23% | 57%
clients/src0% | 1% | 7% | 13% | 76%
connect/json0% | 33% | 37% | 4% | 24%
streams/src0% | 1% | 2% | 14% | 82%
connect/runtime0% | 1% | 3% | 13% | 80%
tools/src0% | 2% | 7% | 17% | 72%
connect/transforms0% | 0% | 13% | 23% | 62%
ROOT0% | 0% | 23% | 33% | 42%
connect/file0% | 0% | 35% | 25% | 39%
log4j-appender/src0% | 0% | 25% | 0% | 74%
streams/test-utils0% | 0% | 0% | 60% | 39%
streams/quickstart0% | 0% | 0% | 0% | 100%
jmh-benchmarks/src0% | 0% | 0% | 0% | 100%
Most Complex Units
Top 20 most complex units
Unit# linesMcCabe index# params
protected static Object convertTo()
in connect/api/src/main/java/org/apache/kafka/connect/data/Values.java
179 58 3
def handle()
in core/src/main/scala/kafka/server/KafkaApis.scala
56 47 1
public Map assign()
in streams/src/main/java/org/apache/kafka/streams/processor/internals/StreamPartitionAssignor.java
191 45 2
public static AbstractRequest parseRequest()
in clients/src/main/java/org/apache/kafka/common/requests/AbstractRequest.java
93 44 3
public static AbstractResponse parseResponse()
in clients/src/main/java/org/apache/kafka/common/requests/AbstractResponse.java
93 44 2
protected static Schema commonSchemaFor()
in connect/api/src/main/java/org/apache/kafka/connect/data/Values.java
67 43 2
protected static SchemaAndValue parse()
in connect/api/src/main/java/org/apache/kafka/connect/data/Values.java
133 42 2
public Schema asConnectSchema()
in connect/json/src/main/java/org/apache/kafka/connect/json/JsonConverter.java
101 40 1
def handleEndTransaction()
in core/src/main/scala/kafka/coordinator/transaction/TransactionCoordinator.scala
129 40 5
void checkSchemaMatches()
in connect/api/src/main/java/org/apache/kafka/connect/header/ConnectHeaders.java
75 39 1
private static JsonNode convertToJson()
in connect/json/src/main/java/org/apache/kafka/connect/json/JsonConverter.java
109 39 2
public static Object parseType()
in clients/src/main/java/org/apache/kafka/common/config/ConfigDef.java
89 35 3
public void onCompletion()
in connect/runtime/src/main/java/org/apache/kafka/connect/storage/KafkaConfigBackingStore.java
132 31 2
private[group] def loadGroupsAndOffsets()
in core/src/main/scala/kafka/coordinator/group/GroupMetadataManager.scala
114 30 2
def main()
in core/src/main/scala/kafka/tools/SimpleConsumerShell.scala
204 30 1
public static void main()
in tools/src/main/java/org/apache/kafka/tools/ProducerPerformance.java
105 28 1
def storeOffsets()
in core/src/main/scala/kafka/coordinator/group/GroupMetadataManager.scala
111 27 8
public LoginContext login()
in clients/src/main/java/org/apache/kafka/common/security/kerberos/KerberosLogin.java
146 26 0
override def onComplete()
in core/src/main/scala/kafka/coordinator/transaction/TransactionMarkerRequestCompletionHandler.scala
125 26 1
private def prepareOffsetsToReset()
in core/src/main/scala/kafka/admin/ConsumerGroupCommand.scala
86 24 2