guardian / fastly-cache-purger - Conditional Complexity

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).

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Conditional Complexity Overall

There are 22 units with 314 lines of code in units (50.2% of code).

0 very complex units (0 lines of code)
0 complex units (0 lines of code)
0 medium complex units (0 lines of code)
2 simple units (91 lines of code)
20 very simple units (223 lines of code)

Legend:

51+

26-50

11-25

6-10

1-5

Alternative Visuals

3D view of all units

Conditional Complexity per Extension

51+

26-50

11-25

6-10

1-5

Conditional Complexity per Logical Component

primary logical decomposition

51+

26-50

11-25

6-10

1-5

Most Complex Units

Top 22 most complex units

Unit	# lines	McCabe index	# params
private def raiseAllThePurges() in src/main/scala/com/gu/fastly/Lambda.scala	46	6	1
def handle() in src/main/scala/com/gu/fastly/Lambda.scala	45	6	1
private def extractAliasPaths() in src/main/scala/com/gu/fastly/Lambda.scala	14	5	1
private def extractUpdateContentType() in src/main/scala/com/gu/fastly/Lambda.scala	10	4	1
private def makeContentDecachedEventsFromDecache() in src/main/scala/com/gu/fastly/Lambda.scala	17	3	1
def sendFastlyPurgeRequest() in src/main/scala/com/gu/fastly/Lambda.scala	25	3	6
private def sendPurgeCountMetric() in src/main/scala/com/gu/fastly/Lambda.scala	22	3	1
def deserializeEvents() in src/main/scala/com/gu/fastly/CrierEventDeserializer.scala	13	3	1
def sendAmpDeleteRequest() in src/main/scala/com/gu/googleamp/AmpFlusher.scala	9	1	1
private def getCurrentUnixtime() in src/main/scala/com/gu/googleamp/AmpFlusher.scala	3	1	0
private def getPrivateKey() in src/main/scala/com/gu/googleamp/AmpFlusher.scala	6	1	0
private def computeSignature() in src/main/scala/com/gu/googleamp/AmpFlusher.scala	9	1	2
private def signatureAsWebSafeString() in src/main/scala/com/gu/googleamp/AmpFlusher.scala	7	1	1
private def makeRequestUrl() in src/main/scala/com/gu/googleamp/AmpFlusher.scala	7	1	2
def load() in src/main/scala/com/gu/fastly/Config.scala	27	1	0
private def loadProperties() in src/main/scala/com/gu/fastly/Config.scala	7	1	2
private def getMandatoryConfig() in src/main/scala/com/gu/fastly/Config.scala	12	1	2
def serialize() in src/main/scala/com/gu/fastly/ContentDecachedEventSerializer.scala	6	1	1
def process() in src/main/scala/com/gu/fastly/CrierEventProcessor.scala	7	1	1
def makeMapiSurrogateKey() in src/main/scala/com/gu/fastly/Lambda.scala	6	1	1
private def sendFastlyPurgeRequestForAjaxFile() in src/main/scala/com/gu/fastly/Lambda.scala	13	1	2
def eventFromRecord() in src/main/scala/com/gu/fastly/CrierEventDeserializer.scala	3	1	1