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<table class="wysiwyg-macro" data-macro-name="unmigrated-inline-wiki-markup" data-macro-parameters="atlassian-macro-output-type=BLOCK" style="background-image: url(/plugins/servlet/confluence/placeholder/macro-heading?definition=e3VubWlncmF0ZWQtaW5saW5lLXdpa2ktbWFya3VwOmF0bGFzc2lhbi1tYWNyby1vdXRwdXQtdHlwZT1CTE9DS30&amp;locale=en_GB&amp;version=2); background-repeat: no-repeat;" data-macro-body-type="PLAIN_TEXT"><tr><td class="wysiwyg-macro-body"><pre>{iframe:src=http://update.sonarsource.org/plugins/uselesscodetracker.html|width=700|height=250|frameborder=0}
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{iframe}</pre></td></tr></table><h1>Description / Features</h1><p>The objective of this plugin is report on the number of lines that can be reduced in an application. It currently works on 3 axes:</p><p><strong>1. Report on number of duplicated lines that could be reduced</strong><br /> Currently SonarQube tells you that you have 50 lines involved in a duplication. But it does not easily tell you whether this is two blocks of 25 lines that are duplicated (in which case you can save 25 lines) or 5 blocks of 10 lines (in which case you can save 40 lines). With this plugin you get this extra information. Algorithm is the following: assuming that refactoring will not cross boundaries of sub-projects (no support for cross-project duplication detection), first occurence of duplicated block will survive and all others can be removed.</p><p><strong>2. Report on the number of lines of dead code that could be reduced (only for Java)</strong><br /> Currently SonarQube reports on the number of unsused private method within you application. This can be done through the <code>PMD:UnusedPrivateMethod</code> or through the <code>SQUID:UnusedPrivateMethod</code>. This plugin calculates the number of lines that can be saved for each of them and aggregates them.</p><p><strong>3. Report on the number of lines of potential dead code that could be reduced <strong>(only for Java)</strong></strong><br /> Currently SonarQube reports on the number of unsused protected method within you application. This can be done through the <code>SQUID:UnusedProtectedMethod</code>. This plugin calculates the number of lines that can be saved for each of them and aggregates them.</p><p><img class="confluence-embedded-image" height="302" width="635" src="/download/attachments/231082357/Sonar+-+Struts+Core.png?version=1&amp;modificationDate=1371665472017" data-image-src="/download/attachments/231082357/Sonar+-+Struts+Core.png?version=1&amp;modificationDate=1371665472017" data-linked-resource-id="231377133" data-linked-resource-type="attachment" data-linked-resource-default-alias="Sonar - Struts Core.png" data-base-url="http://docs.codehaus.org" data-linked-resource-container-id="231082357" title="null > Sonar - Struts Core.png" data-element-title="Sonar - Struts Core.png"></p><p>Note that an unused protected method could be used outside the application through inheritance. This is why we call it potential dead code.</p><h1>Installation</h1><ol><li>Install the plugin through the <a href="http://docs.codehaus.org/display/SONAR/Update+Center" rel="nofollow">Update Center</a> or download it into the <em>SONARQUBE_HOME/extensions/plugins</em> directory</li><li>Restart the SonarQubeserver</li></ol><h1>Usage</h1><ol><li>Switch on the coding rules that you want to monitor in your quality profile</li><li>Run a quality analysis</li></ol><h1>Change Log</h1><p><img class="editor-inline-macro" src="/plugins/servlet/confluence/placeholder/macro?definition=e2ppcmFpc3N1ZXM6YW5vbnltb3VzPXRydWV8dGl0bGU9VmVyc2lvbiAwLjV8aGVpZ2h0PTEwMHxyZW5kZXJNb2RlPXN0YXRpY3x3aWR0aD05MDB8Y29sdW1ucz10eXBlO2tleTtzdW1tYXJ5O3ByaW9yaXR5fHVybD1odHRwOi8vamlyYS5jb2RlaGF1cy5vcmcvc3IvamlyYS5pc3N1ZXZpZXdzOnNlYXJjaHJlcXVlc3QteG1sL3RlbXAvU2VhcmNoUmVxdWVzdC54bWw_Zml4Zm9yPTE4Mjc0JnBpZD0xMTkxMSZzb3J0ZXIvZmllbGQ9aXNzdWVrZXkmc29ydGVyL29yZGVyPURFU0MmdGVtcE1heD0xMDAwfQ&amp;locale=en_GB&amp;version=2" data-macro-name="jiraissues" data-macro-parameters="anonymous=true|columns=type;key;summary;priority|height=100|renderMode=static|title=Version 0.5|url=http://jira.codehaus.org/sr/jira.issueviews:searchrequest-xml/temp/SearchRequest.xml?fixfor\=18274&amp;pid\=11911&amp;sorter/field\=issuekey&amp;sorter/order\=DESC&amp;tempMax\=1000|width=900"></p><p> </p><p><img class="editor-inline-macro" src="/plugins/servlet/confluence/placeholder/macro?definition=e2ppcmFpc3N1ZXM6YW5vbnltb3VzPXRydWV8dGl0bGU9VmVyc2lvbiAwLjR8aGVpZ2h0PTUwfHJlbmRlck1vZGU9c3RhdGljfHdpZHRoPTkwMHxjb2x1bW5zPXR5cGU7a2V5O3N1bW1hcnk7cHJpb3JpdHl8dXJsPWh0dHA6Ly9qaXJhLmNvZGVoYXVzLm9yZy9zci9qaXJhLmlzc3Vldmlld3M6c2VhcmNocmVxdWVzdC14bWwvdGVtcC9TZWFyY2hSZXF1ZXN0LnhtbD9maXhmb3I9MTc1MDgmcGlkPTExOTExJnNvcnRlci9maWVsZD1pc3N1ZWtleSZzb3J0ZXIvb3JkZXI9REVTQyZ0ZW1wTWF4PTEwMDB9&amp;locale=en_GB&amp;version=2" data-macro-name="jiraissues" data-macro-parameters="anonymous=true|columns=type;key;summary;priority|height=50|renderMode=static|title=Version 0.4|url=http://jira.codehaus.org/sr/jira.issueviews:searchrequest-xml/temp/SearchRequest.xml?fixfor\=17508&amp;pid\=11911&amp;sorter/field\=issuekey&amp;sorter/order\=DESC&amp;tempMax\=1000|width=900"></p><p> </p><p><img class="editor-inline-macro" src="/plugins/servlet/confluence/placeholder/macro?definition=e2ppcmFpc3N1ZXM6YW5vbnltb3VzPXRydWV8dGl0bGU9VmVyc2lvbiAwLjJ8aGVpZ2h0PTUwfHJlbmRlck1vZGU9c3RhdGljfHdpZHRoPTkwMHxjb2x1bW5zPXR5cGU7a2V5O3N1bW1hcnk7cHJpb3JpdHl8dXJsPWh0dHA6Ly9qaXJhLmNvZGVoYXVzLm9yZy9zci9qaXJhLmlzc3Vldmlld3M6c2VhcmNocmVxdWVzdC14bWwvdGVtcC9TZWFyY2hSZXF1ZXN0LnhtbD9maXhmb3I9MTY5MDQmcGlkPTExOTExJnNvcnRlci9maWVsZD1pc3N1ZWtleSZzb3J0ZXIvb3JkZXI9REVTQyZ0ZW1wTWF4PTEwMDB9&amp;locale=en_GB&amp;version=2" data-macro-name="jiraissues" data-macro-parameters="anonymous=true|columns=type;key;summary;priority|height=50|renderMode=static|title=Version 0.2|url=http://jira.codehaus.org/sr/jira.issueviews:searchrequest-xml/temp/SearchRequest.xml?fixfor\=16904&amp;pid\=11911&amp;sorter/field\=issuekey&amp;sorter/order\=DESC&amp;tempMax\=1000|width=900"></p>