On Fri, Dec 15, 2023 at 11:54 AM Jun Suzuki <junsuzuki1...@gmail.com> wrote:
>
> Rémy
> Thank you so much for your support.
> May I confirm a little bit further regarding your reply.
>
> 2023年12月15日(金) 17:08 Rémy Maucherat <r...@apache.org>:
> >
> > On Fri, Dec 15, 2023 at 4:18 AM Jun Suzuki <junsuzuki1...@gmail.com> wrote:
>
> > > (1) Guidance is not so clear about following points:
> > > Should I copy the deployed application(with or without war file?) from
> > > existing Tomcat server webapps directory, to webapps directory of
> > > $TOMCAT_STUFFED?
> > > Should I copy all the files from conf directory of existing Tomcat
> > > server, to conf directory of $TOMCAT_STUFFED?
> >
> > Yes.
> > When building your image, you have to compile all the classes into it.
> > So that means all the classes of the webapp as well. So if you don't
> > copy your webapp for the script to compile, no webapp classes ... Also
> > all the webapp Java classes and JARs will have to be included in the
> > image as well for annotation scanning.
>
> Is it correct that following source from existing Tomcat Server needed
> to be copied into $TOMCAT_STUFFED?
> A.  All files under conf folder (including war file)
> B.  All files under webapps folder
> C.  How about lib folder? Should it also be copied?
> D.  How about java source code(which are not deployed on Tomcat)

The doc is correct, so just use that:
- Copy config files from conf (obvious)
- Webapps go in webapps (unless the host appBase is something else)
And that's it.

> >
> > > (2) On the step of execution of "$JAVA_HOME/bin/java -Dcatalina.base=.
> > > -Djava.util.logging.config.file=conf/logging.properties -jar
> > > target/tomcat-stuffed-1.0.jar --catalina -generateCode src/main/java",
> > > errors messages show as below:
> > > ...................................................
> > > Can't load log handler "1catalina.org.apache.juli.AsyncFileHandler"
> > > java.lang.ClassNotFoundException: 
> > > 1catalina.org.apache.juli.AsyncFileHandler
> > > java.lang.ClassNotFoundException: 
> > > 1catalina.org.apache.juli.AsyncFileHandler
> > >         at 
> > > java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
> > >         at 
> > > java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
> > >         at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
> > > ...................................................
> >
> > Yes, avoid the juli file handlers. There's a jul file handler I think:
> > java.util.logging.FileHandler
>
> I revised the source code by deleting "import java.util.*", and I
> recompiled the java source and copied the war file into
> $TOMCAT_STUFFED.
> However, the error message remains:
> Can't load log handler "1localhost.org.apache.juli.AsyncFileHandler"
> java.lang.ClassNotFoundException: 1localhost.org.apache.juli.AsyncFileHandler
> ...........................
> Can't load log handler "2localhost.org.apache.juli.AsyncFileHandler"
> java.lang.ClassNotFoundException: 2localhost.org.apache.juli.AsyncFileHandler

Use stuff from java.util.logging instead if juli doesn't work for you.
Or change the pom to add it. Juli makes things more complex with
Graal, so the pom doesn't have it.
As explained in the doc, the pom needs to be edited for needed dependencies.

> ...........................
> 15-Dec-2023 10:35:47.580 INFO [main]
> org.apache.catalina.startup.HostConfig.deployDirectory Deployment of
> web application directory
> [/home/opc/project/tomcat-native/stuffed/webapps/ROOT] has finished in
> [215] ms
> 15-Dec-2023 10:35:47.580 INFO [main]
> org.apache.catalina.startup.HostConfig.deployDirectory Deployment of
> web application directory
> [/home/opc/project/tomcat-native/stuffed/webapps/ROOT] has finished in
> [215] ms
> 15-Dec-2023 10:35:47.583 INFO [main]
> org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler
> ["http-nio-8080"]
> 15-Dec-2023 10:35:47.583 INFO [main]
> org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler
> ["http-nio-8080"]
>
> Since the error messages are showing as above and the process is
> hanging on there, I could not proceed with the step of the next "maven
> package" unless I open another terminal to run maven command.
> Do you have any idea about how to fix this error?

Well, there's no error there, so it's fine. The process is to generate
reflection metadata for your webapp depending on what it needs, so you
need to write a script that exercises all your paths in your webapp
[that would use reflection]. It's kind of like using your webapp
testsuite there. Once that is done, you should shutdown Tomcat as
usual, the metadata has been generated by the agent.
That is explained here:
https://tomcat.apache.org/tomcat-9.0-doc/graal.html#Native_image_configuration

Then you can move on to
https://tomcat.apache.org/tomcat-9.0-doc/graal.html#Building_the_native_image

Rémy

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