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https://issues.apache.org/jira/browse/MCOMPILER-381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17789643#comment-17789643
 ] 

ASF GitHub Bot commented on MCOMPILER-381:
------------------------------------------

olamy commented on code in PR #181:
URL: 
https://github.com/apache/maven-compiler-plugin/pull/181#discussion_r1404816887


##########
src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java:
##########
@@ -1400,10 +1406,11 @@ protected int getRequestThreadCount() {
         return session.getRequest().getDegreeOfConcurrency();
     }
 
-    protected Date getBuildStartTime() {
-        MavenExecutionRequest request = session.getRequest();
-        Date buildStartTime = request == null ? new Date() : 
request.getStartTime();
-        return buildStartTime == null ? new Date() : buildStartTime;
+    private Optional<Instant> getBuildStartTime() {

Review Comment:
   try a github search and you will see 
https://github.com/search?q=extends+AbstractCompilerMojo&type=code
   Even if it's maybe a bad idea this was not private from start but it is what 
it is we have to live (almost forever0 with that.
   by the way there is no problem marking those methods as deprecated and make 
them using the private one. 





> Refactoring needed for isDependencyChanged / Using fileExtensions 
> (AbstractCompilerMojo)
> ----------------------------------------------------------------------------------------
>
>                 Key: MCOMPILER-381
>                 URL: https://issues.apache.org/jira/browse/MCOMPILER-381
>             Project: Maven Compiler Plugin
>          Issue Type: Improvement
>    Affects Versions: 3.8.1
>            Reporter: Karl Heinz Marbaise
>            Priority: Minor
>             Fix For: 3.12.0
>
>
> The code in the class AbstractCompilerMojo has a method 
> {{isDependencyChanged}} which uses the attribute {{fileExtensions}} which is 
> being changed within the {{isDependencyChanged}} method. This attribute is 
> also being used by the method {{hasNewFile}} which is a kind of confusing (a 
> control via a global variable).
> Furthermore a change in {{isDependencyChanged}} where replacing {{".class"}} 
> with {{"class"}} results in a [fail which is described here|MCOMPILER-379]. 
> It should be investigated how this code can be made more clear and maybe 
> easier to understand.



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