Places in code with 6 or more lines that are exactly the same.
Intro
- For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
- Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
- You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.
- To learn more about duplications and techniques for eliminating duplication, Sokrates recommends the following resources:
- Avoid Repetition, MartinFlower.com (IEEE Software article)
- Refactoring duplicated code, sourcemaking.com
- Beck Design Rules, MartinFowler.com
- DRY (Don't Repeat Yourself) Principle, Wikipedia
- The Cut-and-Paste Programming Software Development Anti-Pattern, sourcemaking.com
- Code Smells / Duplicated Code, Jeff Atwood, codinghorror.com:
- "Duplicated code is the bane of software development. Stamp out duplication whenever possible. You should always be on the lookout for more subtle cases of near-duplication, too. Don't Repeat Yourself!"
- Reducing Coupling, MartinFlower.com (IEEE Software article):
- "There are several ways to describe coupling, but it boils down to this: If changing one module in a program requires changing another module, then coupling exists. ... Duplication always implies coupling, because changing one piece of duplicate code implies changing the other."
Duplication Overall
- 69% duplication:
- 2,494 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 1,727 duplicated lines
- 88 duplicates
Duplication per Extension
Duplication per Component (primary)
Duplication Between Components (50+ lines)
Open 3D force graph...
Show more details on duplication between components...
From Component
--> To Component
Duplicated
Lines
File Pairs
Details
cloudwatch-controller/src/main/java/com/amazonwebservices/blogs/containers/kubernetes (66%)
--> cloudwatch-lambda/src/main/java/com/amazonwebservices/blogs/containers/kubernetes (100%)
780
25 file pairs
details...
cloudwatch-controller/src/main/java/com/amazonwebservices/blogs/containers/sigv4 (99%)
--> cloudwatch-lambda/src/main/java/com/amazonwebservices/blogs/containers/sigv4 (99%)
504
4 file pairs
details...
cloudwatch-controller/src/main/java/io/kubernetes/client/util (100%)
--> cloudwatch-lambda/src/main/java/io/kubernetes/client/util (100%)
190
2 file pairs
details...
cloudwatch-controller/src/main/java/com/amazonwebservices/blogs/containers/config (37%)
--> cloudwatch-lambda/src/main/java/com/amazonwebservices/blogs/containers/config (100%)
58
2 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| cloudwatch-controller/src/main/java/com/amazonwebservices/blogs/containers/kubernetes (66%) --> cloudwatch-lambda/src/main/java/com/amazonwebservices/blogs/containers/kubernetes (100%) |
780 | 25 file pairs | details... |
| cloudwatch-controller/src/main/java/com/amazonwebservices/blogs/containers/sigv4 (99%) --> cloudwatch-lambda/src/main/java/com/amazonwebservices/blogs/containers/sigv4 (99%) |
504 | 4 file pairs | details... |
| cloudwatch-controller/src/main/java/io/kubernetes/client/util (100%) --> cloudwatch-lambda/src/main/java/io/kubernetes/client/util (100%) |
190 | 2 file pairs | details... |
| cloudwatch-controller/src/main/java/com/amazonwebservices/blogs/containers/config (37%) --> cloudwatch-lambda/src/main/java/com/amazonwebservices/blogs/containers/config (100%) |
58 | 2 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 113 | x 2 | cloudwatch-controller/sr...ainers/kubernetes/modelcloudwatch-lambda/src/ma...ainers/kubernetes/model |  K8sMetricAlarmCustomObjectSpec.javaK8sMetricAlarmCustomObjectSpec.java |
9:200 (100%)9:200 (100%) | view |
| 102 | x 2 | cloudwatch-controller/sr.../blogs/containers/sigv4cloudwatch-lambda/src/ma.../blogs/containers/sigv4 | AWS4SignerBase.javaAWS4SignerBase.java |
61:244 (87%)62:245 (86%) | view |
| 87 | x 2 | cloudwatch-controller/sr.../kubernetes/client/utilcloudwatch-lambda/src/ma.../kubernetes/client/util | CustomAuthentication.javaCustomAuthentication.java |
35:151 (100%)35:151 (100%) | view |
| 86 | x 2 | cloudwatch-controller/sr...ainers/kubernetes/modelcloudwatch-lambda/src/ma...ainers/kubernetes/model | K8sMetricAlarmCustomObjectList.javaK8sMetricAlarmCustomObjectList.java |
12:141 (100%)12:141 (100%) | view |
| 81 | x 2 | cloudwatch-controller/sr...ainers/kubernetes/modelcloudwatch-lambda/src/ma...ainers/kubernetes/model | K8sMetricAlarmCustomObject.javaK8sMetricAlarmCustomObject.java |
10:130 (100%)10:130 (100%) | view |
| 62 | x 2 | cloudwatch-controller/sr...s/containers/sigv4/utilcloudwatch-lambda/src/ma...s/containers/sigv4/util | HttpUtils.javaHttpUtils.java |
19:106 (100%)19:106 (100%) | view |
| 61 | x 2 | cloudwatch-controller/sr...ainers/kubernetes/modelcloudwatch-lambda/src/ma...ainers/kubernetes/model | ScalingPolicy.javaScalingPolicy.java |
9:108 (100%)9:108 (100%) | view |
| 53 | x 2 | cloudwatch-controller/sr.../blogs/containers/sigv4cloudwatch-lambda/src/ma.../blogs/containers/sigv4 | AWS4SignerForAuthorizationHeader.javaAWS4SignerForAuthorizationHeader.java |
17:118 (100%)17:118 (100%) | view |
| 49 | x 2 | cloudwatch-controller/sr...ainers/kubernetes/modelcloudwatch-lambda/src/ma...ainers/kubernetes/model | ScalingBehavior.javaScalingBehavior.java |
11:91 (100%)11:91 (100%) | view |
| 47 | x 2 | ROOTROOT |  http-rate-alarm.yamlhttp-rate-alarm.yaml |
39:85 (32%)100:146 (32%) | view |
| 21 | x 2 | cloudwatch-controller/sr...s/containers/sigv4/utilcloudwatch-lambda/src/ma...s/containers/sigv4/util | BinaryUtils.javaBinaryUtils.java |
8:51 (100%)8:51 (100%) | view |
| 16 | x 2 | cloudwatch-controller/sr...blogs/containers/configcloudwatch-lambda/src/ma...blogs/containers/config | AWSConfig.javaAWSConfig.java |
3:27 (100%)3:27 (100%) | view |
| 14 | x 2 | cloudwatch-controller/sr.../blogs/containers/sigv4cloudwatch-lambda/src/ma.../blogs/containers/sigv4 | AWS4SignerBase.javaAWS4SignerBase.java |
25:45 (11%)25:45 (11%) | view |
| 13 | x 2 | ROOTROOT | operator.yamloperator.yaml |
33:45 (7%)47:59 (7%) | view |
| 13 | x 2 | cloudwatch-controller/sr...blogs/containers/configcloudwatch-lambda/src/ma...blogs/containers/config | EKSConfig.javaEKSConfig.java |
3:22 (100%)3:22 (100%) | view |
| 10 | x 2 | cloudwatch-controller/sr...ainers/kubernetes/modelcloudwatch-controller/sr...ainers/kubernetes/model | K8sMetricAlarmCustomObject.javaK8sMetricAlarmCustomObjectList.java |
46:59 (12%)71:84 (11%) | view |
| 10 | x 2 | cloudwatch-controller/sr...ainers/kubernetes/modelcloudwatch-controller/sr...ainers/kubernetes/model | K8sMetricAlarmCustomObject.javaK8sMetricAlarmCustomObjectList.java |
29:42 (12%)31:44 (11%) | view |
| 10 | x 2 | cloudwatch-controller/sr...ainers/kubernetes/modelcloudwatch-lambda/src/ma...ainers/kubernetes/model | K8sMetricAlarmCustomObjectList.javaK8sMetricAlarmCustomObject.java |
31:44 (11%)29:42 (12%) | view |
| 10 | x 2 | cloudwatch-lambda/src/ma...ainers/kubernetes/modelcloudwatch-lambda/src/ma...ainers/kubernetes/model | K8sMetricAlarmCustomObject.javaK8sMetricAlarmCustomObjectList.java |
46:59 (12%)71:84 (11%) | view |
| 10 | x 2 | cloudwatch-lambda/src/ma...ainers/kubernetes/modelcloudwatch-lambda/src/ma...ainers/kubernetes/model | K8sMetricAlarmCustomObject.javaK8sMetricAlarmCustomObjectList.java |
29:42 (12%)31:44 (11%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 52 | x 2 | cloudwatch-lambda/src/ma.../kubernetes/client/utilcloudwatch-controller/sr.../kubernetes/client/util | CustomAuthentication.javaCustomAuthentication.java |
84:152 84:152 | view |
| 49 | x 2 | cloudwatch-lambda/src/ma.../blogs/containers/sigv4cloudwatch-controller/sr.../blogs/containers/sigv4 | AWS4SignerForAuthorizationHeader.javaAWS4SignerForAuthorizationHeader.java |
48:119 48:119 | view |
| 30 | x 2 | cloudwatch-lambda/src/ma.../kubernetes/client/utilcloudwatch-controller/sr.../kubernetes/client/util | CustomAuthentication.javaCustomAuthentication.java |
48:82 48:82 | view |
| 24 | x 2 | cloudwatch-lambda/src/ma.../blogs/containers/sigv4cloudwatch-controller/sr.../blogs/containers/sigv4 | AWS4SignerBase.javaAWS4SignerBase.java |
172:200 171:199 | view |
| 24 | x 2 | cloudwatch-lambda/src/ma...s/containers/sigv4/utilcloudwatch-controller/sr...s/containers/sigv4/util | HttpUtils.javaHttpUtils.java |
44:70 44:70 | view |
| 20 | x 2 | cloudwatch-lambda/src/ma...s/containers/sigv4/utilcloudwatch-controller/sr...s/containers/sigv4/util | HttpUtils.javaHttpUtils.java |
72:94 72:94 | view |
| 16 | x 2 | cloudwatch-lambda/src/ma...s/containers/sigv4/utilcloudwatch-controller/sr...s/containers/sigv4/util | HttpUtils.javaHttpUtils.java |
26:42 26:42 | view |
| 15 | x 2 | cloudwatch-lambda/src/ma...ainers/kubernetes/modelcloudwatch-controller/sr...ainers/kubernetes/model | K8sMetricAlarmCustomObjectSpec.javaK8sMetricAlarmCustomObjectSpec.java |
159:174 159:174 | view |
| 14 | x 2 | cloudwatch-lambda/src/ma.../blogs/containers/sigv4cloudwatch-controller/sr.../blogs/containers/sigv4 | AWS4SignerBase.javaAWS4SignerBase.java |
123:137 122:136 | view |
| 14 | x 2 | cloudwatch-lambda/src/ma.../blogs/containers/sigv4cloudwatch-controller/sr.../blogs/containers/sigv4 | AWS4SignerBase.javaAWS4SignerBase.java |
142:157 141:156 | view |
| 13 | x 2 | cloudwatch-lambda/src/ma...ainers/kubernetes/modelcloudwatch-controller/sr...ainers/kubernetes/model | ScalingPolicy.javaScalingPolicy.java |
78:92 78:92 | view |
| 13 | x 2 | cloudwatch-lambda/src/ma.../blogs/containers/sigv4cloudwatch-controller/sr.../blogs/containers/sigv4 | AWS4SignerBase.javaAWS4SignerBase.java |
96:116 95:115 | view |
| 12 | x 2 | cloudwatch-lambda/src/ma...ainers/kubernetes/modelcloudwatch-controller/sr...ainers/kubernetes/model | ScalingBehavior.javaScalingBehavior.java |
56:70 56:70 | view |
| 12 | x 2 | cloudwatch-lambda/src/ma...ainers/kubernetes/modelcloudwatch-controller/sr...ainers/kubernetes/model | K8sMetricAlarmCustomObjectList.javaK8sMetricAlarmCustomObjectList.java |
103:115 103:115 | view |
| 12 | x 2 | cloudwatch-lambda/src/ma...ainers/kubernetes/modelcloudwatch-controller/sr...ainers/kubernetes/model | K8sMetricAlarmCustomObjectSpec.javaK8sMetricAlarmCustomObjectSpec.java |
182:194 182:194 | view |
| 12 | x 2 | cloudwatch-lambda/src/ma...ainers/kubernetes/modelcloudwatch-controller/sr...ainers/kubernetes/model | K8sMetricAlarmCustomObject.javaK8sMetricAlarmCustomObject.java |
92:104 92:104 | view |
| 12 | x 2 | cloudwatch-lambda/src/ma...s/containers/sigv4/utilcloudwatch-controller/sr...s/containers/sigv4/util | BinaryUtils.javaBinaryUtils.java |
18:32 18:32 | view |
| 11 | x 2 | cloudwatch-lambda/src/ma...s/containers/sigv4/utilcloudwatch-controller/sr...s/containers/sigv4/util | HttpUtils.javaHttpUtils.java |
96:107 96:107 | view |
| 10 | x 2 | cloudwatch-lambda/src/ma...ainers/kubernetes/modelcloudwatch-controller/sr...ainers/kubernetes/model | ScalingPolicy.javaScalingPolicy.java |
57:68 57:68 | view |
| 10 | x 2 | cloudwatch-lambda/src/ma.../blogs/containers/sigv4cloudwatch-controller/sr.../blogs/containers/sigv4 | AWS4SignerBase.javaAWS4SignerBase.java |
78:90 77:89 | view |