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https://issues.apache.org/jira/browse/OOZIE-3468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16877895#comment-16877895
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Andras Salamon commented on OOZIE-3468:
---------------------------------------
The second work-in-progress patch adds a new patch tester for modernizer. It
only checks the number of errors and give results like this:
{noformat}
----------------------------
+1 PATCH_APPLIES
+1 MODERNIZER
----------------------------
+1 Overall result, good!, no -1s{noformat}
or
{noformat}
+1 PATCH_APPLIES
-1 MODERNIZER
-1 the patch seems to introduce 1 new modernizer error(s)
----------------------------
-1 Overall result, please check the reported -1(s)
{noformat}
In this current version it does not list the new errors. It might be useful to
add this, but we need to avoid listing lot's of false positive warnings like in
the spotbugs checking.
> Use modernizer plugin
> ---------------------
>
> Key: OOZIE-3468
> URL: https://issues.apache.org/jira/browse/OOZIE-3468
> Project: Oozie
> Issue Type: Improvement
> Components: build
> Affects Versions: trunk
> Reporter: Andras Salamon
> Assignee: Andras Salamon
> Priority: Major
> Attachments: OOZIE-3468-01-wip.patch, OOZIE-3468-02-wip.patch
>
>
> Recently I've opened a few jiras which suggested to use standard java classes
> instead of external libraries ( OOZIE-3463, OOZIE-3467). There is a tool
> which can find such technical depts: [maven modernizer
> plugin|https://github.com/gaul/modernizer-maven-plugin].
> The usage is quite simple:
> {noformat}
> $ mvn modernizer:modernizer
> ...
> [ERROR] /src/oozie/core/src/main/java/org/apache/oozie/StringBlob.java:88:
> Prefer java.lang.String.<init>(byte[], java.nio.charset.Charset)
>
> [ERROR] /src/oozie/core/src/main/java/org/apache/oozie/StringBlob.java:122:
> Prefer java.nio.charset.StandardCharsets
> [ERROR]
> /src/oozie/core/src/main/java/org/apache/oozie/servlet/V2ValidateServlet.java:85:
> Prefer java.nio.charset.StandardCharsets
> [ERROR]
> /src/oozie/core/src/main/java/org/apache/oozie/servlet/V2ValidateServlet.java:92:
> Prefer java.nio.charset.StandardCharsets
> [ERROR]
> /src/oozie/core/src/main/java/org/apache/oozie/servlet/V1JobsServlet.java:188:
> Prefer java.util.ArrayList<>()
> [ERROR]
> /src/oozie/core/src/main/java/org/apache/oozie/servlet/JVMInfo.java:91:
> Prefer java.lang.StringBuilder
> [ERROR]
> /src/oozie/core/src/main/java/org/apache/oozie/servlet/JVMInfo.java:101:
> Prefer java.lang.StringBuilder
> [ERROR]
> /src/oozie/core/src/main/java/org/apache/oozie/servlet/JVMInfo.java:110:
> Prefer java.lang.StringBuilder
> [ERROR]
> /src/oozie/core/src/main/java/org/apache/oozie/servlet/JVMInfo.java:119:
> Prefer java.lang.StringBuilder
> [ERROR]
> /src/oozie/core/src/main/java/org/apache/oozie/servlet/VersionServlet.java:36:
> Prefer java.util.Collections.emptyList()
> [ERROR]
> /src/oozie/core/src/main/java/org/apache/oozie/servlet/V1AdminServlet.java:49:
> Prefer java.util.Collections.emptyList()
> ...
> {noformat}
> There are several ways to use this plugin:
> # Add the plugin to the root pom and let developers manually use this
> plugin. It's the simplest solution, but it will be easy to forget it.
> # Add this to the precommit script similarly to findbugs and at least avoid
> to insert new code which uses old style API. Probably we will have the same
> problems like we have with findbugs, we will have lots of false positive
> warnings.
> # Turn the plugin on by default and fail the compilation if it finds any
> problem. I think this is too strict.
> If we choose option 2 or 3 we should probably specify an ignore list, I don't
> think for instance that we really want to change all the {{new Long(10)}}
> code to {{Long.valueOf(10)}}.
> By default this plugin checks the target java version (1.8 right now) but
> it's possible to specify 1.7 instead if we want to focus on those problems
> first. (It was not working for me without specifying the java version.)
>
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