I wrote small program with JavaFX, and MySQL worked through JDBC. It works well, was compiled well to jar and works from jar also well. To deliver this application to users I packed this to exe with launch4j and build custom small JRE. Exe file was created well and work, but only with full package of JRE. When I start it with my custom JRE I've got this message:
[10-Jul-2023 15:40] FATAL - DbConnection.java - Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
←[mException in Application start method
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at javafx.graphics@19.0.2.1/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:465)
at javafx.graphics@19.0.2.1/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:364)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
As I understand the application has a problem with MySQL module (but I'm not sure). To build a custom JRE I use first jdeps:
jdeps --ignore-missing-deps --list-deps --multi-release 11 --module-path javafx\lib;libs --add-modules ALL-MODULE-PATH ExpensesViewer.jar
It shows following dependencies:
java.base
java.datatransfer
java.desktop
java.logging
java.management
java.net.http
java.scripting
java.sql
java.transaction.xa
java.xml
...
here lots of javafx modules
...
jdk.jsobject
jdk.unsupported
jdk.unsupported.desktop
jdk.xml.dom
org.junit.platform.commons/org.junit.platform.commons.logging
org.junit.platform.commons/org.junit.platform.commons.util
So, I created custom JRE with jlink:
jlink --no-header-files --no-man-pages --compress=2 --strip-debug --module-path libs;javafx/lib --add-modules java.base,java.naming,java.datatransfer,java.desktop,java.logging,java.management,java.net.http,java.scripting,java.sql,java.transaction.xa,java.xml,jdk.jsobject,jdk.unsupported,jdk.unsupported.desktop,jdk.xml.dom --output java-runtime
As I understand I need to add something else to modules list (because if I do not use custom but full system JRE everything works well).
And I don't understand how to find all mandatory module names that I need include (jdeps doesn't show all the necessary dependencies; for example, java.naming was mandatory, but jdeps doesn't show it).
module-info.java:
module ru.viewer.expensesviewer {
requires javafx.controls;
requires javafx.fxml;
requires java.sql;
requires mysql.connector.j;
requires org.apache.logging.log4j;
//requires rt;
opens ru.viewer.expensesviewer to javafx.fxml;
exports ru.viewer.expensesviewer;
opens ru.viewer.expensesviewer.model to javafx.fxml;
exports ru.viewer.expensesviewer.model;
opens ru.viewer.expensesviewer.controller to javafx.fxml;
exports ru.viewer.expensesviewer.controller;
exports ru.viewer.expensesviewer.model.objects;
opens ru.viewer.expensesviewer.model.objects to javafx.fxml;
exports ru.viewer.expensesviewer.controller.settings;
opens ru.viewer.expensesviewer.controller.settings to javafx.fxml;
exports ru.viewer.expensesviewer.controller.reports;
opens ru.viewer.expensesviewer.controller.reports to javafx.fxml;
exports ru.viewer.expensesviewer.model.objects.settings;
opens ru.viewer.expensesviewer.model.objects.settings to javafx.fxml;
}
added after couple hours: I tried to add all possible modules, looks like this:
jlink --no-header-files --no-man-pages --compress=2 --strip-debug --module-path libs;javafx/lib --add-modules java.base,java.compiler,java.datatransfer,java.desktop,java.instrument,java.logging,java.management,java.management.rmi,java.naming,java.net.http,java.prefs,java.rmi,java.scripting,java.se,java.security.jgss,java.security.sasl,java.smartcardio,java.sql,java.sql.rowset,java.transaction.xa,java.xml,java.xml.crypto,jdk.accessibility,jdk.attach,jdk.charsets,jdk.compiler,jdk.crypto.cryptoki,jdk.crypto.ec,jdk.crypto.mscapi,jdk.dynalink,jdk.editpad,jdk.hotspot.agent,jdk.httpserver,jdk.incubator.foreign,jdk.incubator.vector,jdk.internal.ed,jdk.internal.jvmstat,jdk.internal.le,jdk.internal.opt,jdk.internal.vm.ci,jdk.internal.vm.compiler,jdk.internal.vm.compiler.management,jdk.jartool,jdk.javadoc,jdk.jcmd,jdk.jconsole,jdk.jdeps,jdk.jdi,jdk.jdwp.agent,jdk.jfr,jdk.jlink,jdk.jpackage,jdk.jshell,jdk.jsobject,jdk.jstatd,jdk.localedata,jdk.management,jdk.management.agent,jdk.management.jfr,jdk.naming.dns,jdk.naming.rmi,jdk.net,jdk.nio.mapmode,jdk.random,jdk.sctp,jdk.security.auth,jdk.security.jgss,jdk.unsupported,jdk.unsupported.desktop,jdk.xml.dom,jdk.zipfs, --output java-runtime
AND IT WORKS! now I exactly know that I need to discover mandatory module.
I managed find needed module with method "shot in the dark", how only I added jdk.crypto.cryptoki my custom JRE started work. But why does my program need this module? I've never use this... something for security... how should I discover this dependence?
