apache / hbase - 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 32,952 units with 289,553 lines of code in units (68.3% of code).

6 very complex units (1,180 lines of code)
65 complex units (8,250 lines of code)
611 medium complex units (35,619 lines of code)
1,685 simple units (50,230 lines of code)
30,585 very simple units (194,274 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 50 most complex units

Unit	# lines	McCabe index	# params
private void checkRegionConsistency() in hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java	197	90	2
public boolean next() in hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java	189	60	2
public void run() in hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java	182	56	0
public HBaseFsck exec() in hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java	202	55	2
static TestOptions parseOpts() in hbase-diagnostics/src/main/java/org/apache/hadoop/hbase/PerformanceEvaluation.java	263	53	1
protected GlobalQuotaSettingsImpl merge() in hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/GlobalQuotaSettingsImpl.java	147	51	1
def read() in hbase-examples/src/main/python/thrift2/gen-py/hbase/ttypes.py	125	50	2
public ScanResponse scan() in hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java	170	49	2
static RecordWriter createRecordWriter() in hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/HFileOutputFormat2.java	232	48	2
private boolean checkCoveringPermission() in hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessController.java	134	46	7
private void scan() in hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java	168	46	9
public static int skip() in hbase-common/src/main/java/org/apache/hadoop/hbase/util/OrderedBytes.java	99	46	1
public boolean doCommandLine() in hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/replication/VerifyReplication.java	171	46	1
protected boolean performCompaction() in hbase-server/src/main/java/org/apache/hadoop/hbase/mob/DefaultMobStoreCompactor.java	251	45	8
private int parseArgs() in hbase-server/src/main/java/org/apache/hadoop/hbase/tool/CanaryTool.java	134	45	1
def read() in hbase-examples/src/main/python/thrift2/gen-py/hbase/ttypes.py	124	45	2
def read() in hbase-examples/src/main/python/thrift2/gen-py/hbase/ttypes.py	93	45	2
protected int loadTable() in hbase-diagnostics/src/main/java/org/apache/hadoop/hbase/util/LoadTestTool.java	168	44	0
cfd in hbase-shell/src/main/ruby/hbase/admin.rb	104	43	2
public static String color() in hbase-hbtop/src/main/java/org/apache/hadoop/hbase/hbtop/terminal/impl/EscapeSequences.java	41	43	6
public static List sortAndMerge() in hbase-client/src/main/java/org/apache/hadoop/hbase/filter/MultiRowRangeFilter.java	148	42	1
private void genAssignmentPlan() in hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionPlacementMaintainer.java	186	41	5
private void finishActiveMasterInitialization() in hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java	287	41	0
public boolean verifyResultAgainstDataGenerator() in hbase-diagnostics/src/main/java/org/apache/hadoop/hbase/util/MultiThreadedAction.java	157	41	3
alter in hbase-shell/src/main/ruby/hbase/admin.rb	129	40	3
public int run() in hbase-diagnostics/src/main/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java	157	40	1
def read() in hbase-examples/src/main/python/thrift2/gen-py/hbase/ttypes.py	102	38	2
private boolean doCommandLine() in hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/CopyTable.java	128	38	1
public DeleteResult isDeleted() in hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityScanDeleteTracker.java	129	37	1
public int doWork() in hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/snapshot/ExportSnapshot.java	160	37	0
public MultiResponse multi() in hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java	186	36	2
protected List balanceTable() in hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/SimpleLoadBalancer.java	168	36	2
public Filter build() in hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/ScannerModel.java	119	36	0
private boolean nextInternal() in hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionScannerImpl.java	139	35	2
public static void main() in hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionPlacementMaintainer.java	134	35	1
public ClusterMetrics getClusterMetricsWithoutCoprocessor() in hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java	115	34	1
public void fillUp() in hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java	150	34	3
_hash_to_scan in hbase-shell/src/main/ruby/hbase/table.rb	75	34	1
public static void shutdown() in hbase-server/src/main/java/org/apache/hadoop/hbase/util/JVMClusterUtil.java	97	33	2
private void execProcedure() in hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/ProcedureExecutor.java	97	33	2
public FilterModel() in hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/ScannerModel.java	117	33	1
_get_internal in hbase-shell/src/main/ruby/hbase/table.rb	91	33	2
public ScreenView handleKeyPress() in hbase-hbtop/src/main/java/org/apache/hadoop/hbase/hbtop/screen/top/TopScreenView.java	82	33	1
protected Flow executeFromState() in hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ServerCrashProcedure.java	138	32	2
private void doneEscapeSequenceCharacter() in hbase-hbtop/src/main/java/org/apache/hadoop/hbase/hbtop/terminal/impl/KeyPressGenerator.java	112	32	1
public HFileBlock readBlock() in hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java	106	31	9
private List doNonAtomicRegionMutation() in hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java	131	31	10
private long replayRecoveredEdits() in hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java	158	31	4
eval_input in hbase-shell/src/main/ruby/irb/hirb.rb	98	31	0
public boolean checkRegionChain() in hbase-server/src/main/java/org/apache/hadoop/hbase/util/HbckTableInfo.java	101	30	1