javafx gluon mobile : reflection classes not used - javafx

Question

I am building a mobile gluon javafx application. App runs fine in the jvm but not on mobile.
I found out that i had ClassNotFoundException when loading the FXML and discovered that it would not find java.net.URL(!!) The unfound classes were not present in the projet arm64_ios reflection files, but i somewhat expected that as i did not directly use those classes in the code. Unfortunately, gluon seems not to be able to parse the fxml to add known classes. But i disgress.
Just to validate the problem, i added this class name to my POM reflectionList. As expected, it would find it but block on an other one, then an other one, this was endless.
I check out that when i ran gluonfx:runagent, the missing classes were correctly added to src/main/resources/META-INF/native-image/reflect-config.json.
As per https://docs.gluonhq.com/#_jni_and_reflection , i added a META-INF/substrate/congif/reflectionconfig.json file that was a copy of the META-INF/native-image/reflect-config.json. That did not help.
I do not know why the runagent files are not used, i think i might have fumbled somewhere. I will be very grateful for any hint. Thanks.
Here are the relevant parts of my POM.
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.release>11</maven.compiler.release>
<javafx.version>17.0.2</javafx.version>
<attach.version>4.0.13</attach.version>
<gluonfx.plugin.version>1.0.12</gluonfx.plugin.version>
<javafx.plugin.version>0.0.8</javafx.plugin.version>
<mainClassName>com.blah</mainClassName>
</properties>
<dependencies>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>${javafx.version}</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-fxml</artifactId>
<version>${javafx.version}</version>
</dependency>
<dependency>
<groupId>com.gluonhq</groupId>
<artifactId>charm-glisten</artifactId>
<version>6.1.0</version>
</dependency>
<dependency>
<groupId>com.gluonhq.attach</groupId>
<artifactId>display</artifactId>
<version>${attach.version}</version>
</dependency>
<dependency>
<groupId>com.gluonhq.attach</groupId>
<artifactId>lifecycle</artifactId>
<version>${attach.version}</version>
</dependency>
<dependency>
<groupId>com.gluonhq.attach</groupId>
<artifactId>statusbar</artifactId>
<version>${attach.version}</version>
</dependency>
<dependency>
<groupId>com.gluonhq.attach</groupId>
<artifactId>storage</artifactId>
<version>${attach.version}</version>
</dependency>
<dependency>
<groupId>com.gluonhq.attach</groupId>
<artifactId>util</artifactId>
<version>${attach.version}</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>Gluon</id>
<url>https://nexus.gluonhq.com/nexus/content/repositories/releases</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
</plugin>
<plugin>
<groupId>org.openjfx</groupId>
<artifactId>javafx-maven-plugin</artifactId>
<version>${javafx.plugin.version}</version>
<configuration>
<mainClass>${mainClassName}</mainClass>
</configuration>
<executions>
<execution>
<!-- Default configuration for running -->
<!-- Usage: mvn clean javafx:run -->
<id>default-cli</id>
</execution>
<execution>
<!-- Configuration for manual attach debugging -->
<!-- Usage: mvn clean javafx:run#debug -->
<id>debug</id>
<configuration>
<options>
<option>-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=localhost:8000</option>
</options>
</configuration>
</execution>
<execution>
<!-- Configuration for automatic IDE debugging -->
<id>ide-debug</id>
<configuration>
<options>
<option>-agentlib:jdwp=transport=dt_socket,server=n,address=${jpda.address}</option>
</options>
</configuration>
</execution>
<execution>
<!-- Configuration for automatic IDE profiling -->
<id>ide-profile</id>
<configuration>
<options>
<option>${profiler.jvmargs.arg1}</option>
<option>${profiler.jvmargs.arg2}</option>
<option>${profiler.jvmargs.arg3}</option>
<option>${profiler.jvmargs.arg4}</option>
<option>${profiler.jvmargs.arg5}</option>
</options>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.gluonhq</groupId>
<artifactId>gluonfx-maven-plugin</artifactId>
<version>${gluonfx.plugin.version}</version>
<configuration>
<verbose>true</verbose>
<target>${gluonfx.target}</target>
<attachList>
<list>display</list>
<list>lifecycle</list>
<list>statusbar</list>
<list>storage</list>
</attachList>
<reflectionList>
<list>java.net.URL</list>
</reflectionList>
<mainClass>${mainClassName}</mainClass>
</configuration>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.fxml</include>
<include>**/*.css</include>
<include>**/*.png</include>
<include>*.png</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.fxml</include>
<include>**/*.css</include>
<include>**/*.png</include>
<include>*.png</include>
</includes>
</resource>
</resources>
</build>
<profiles>
<profile>
<id>ios</id>
<properties>
<gluonfx.target>ios</gluonfx.target>
</properties>
</profile>
<profile>
<id>android</id>
<properties>
<gluonfx.target>android</gluonfx.target>
</properties>
</profile>
</profiles>

Answer 1

Ok, now i found a solution, not sure i understood what happens.
Everything was caused by my resources includes. Not sure why/if i added them, not sure where they came from. It seems that configuring includes removes the default ones and that forbid the inclusion of the json files, and thus i had no other defined reflections than those that were found at compilation.
Removing the includes section of the POM and adding <nativeImageArgs>--allow-incomplete-classpath</nativeImageArgs> within the POM finally cleared all compilation blurps.
This post helped me for this last tip: Why is my JavaFX 17 Application not building with Gluon ? Logged as JNI / Reflection problem
Thanks José for coming by.