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https://issues.apache.org/jira/browse/OOZIE-3468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16813241#comment-16813241
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Julia Kinga Marton commented on OOZIE-3468:
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I would vote for including it to the pre-commit build and check only the new
code, similar to the SpotBugs plugin
> 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
>
>
> 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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