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Filip,
On 7/13/20 17:59, Filip Hanik wrote:
> for discussion, all feedback and questions welcome:
>
>
> I've created a concept of having Apache Tomcat, embedded, run
> without reflection in a native image. This concept creates a jar,
> tomcat-embedded-programmatic.jar, that can be fine tuned to only
> include what is needed in a default configuration when an embedded
> tomcat instance is used and configured programatically.
>
> Steps to run Apache Tomcat using Java 8 without reflection
>
> 1. Make sure you have native-image (from the graal installation)
> on your path 2. git clone -b
> feature/embed-minimal-programmatic-jar-file-master
> g...@github.com:fhanik/tomcat.git 3. cd tomcat/res/graal/ 4.
> ./build-tomcat-native-image.sh && ./graal-measure.sh
>
> Should yield an output similar to (Graal 20.1): SUCCESS: the
> servlet is working RSS memory: 20.7M Image size: 20.5M
>
>
> or using an older graal, 19.2 SUCCESS: the servlet is working RSS
> memory: 18.0M Image size: 16.7M
>
>
> This also leaves a file named
> ${java.io.tmpdir}/XReflectionIntrospectionUtils.java so that you
> can review the solution to IntrospectionUtils.java
>
> Goals of this concept
>
> 1. Do not break anything 2. Create a new and optimized for size
> artifact, tomcat-embedded-programmatic 3. Remove reflection by
> introspecting classes that are currently passed into
> IntrospectionUtils.set/getProperty by generating setters/getters at
> build time
>
> How it's done
>
> 1. I've build out a small introspection tool in the package
> org.apache.tomcat.util.xreflect 2. During build time, it analyses a
> set of known classes that are used with IntrospectionUtils.java,
> and generates XReflectionIntrospectionUtils.java 3. When it
> packages tomcat-embed-programmatic.jar it uses the generated code
> when calling setProperty and getProperty
>
> A PR would look like this:
> https://github.com/apache/tomcat/compare/master...fhanik:feature/embed
- -minimal-programmatic-jar-file-master?expand=1
Sounds
>
like a really interesting ApacheCon presentation ;)
- -chris
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