We Keep Coding

Creating executable JAR in IntelliJ (Java 18, JavaFX 18 Maven project), "WARNING: Unsupported JavaFX configuration..."

I have a Java 18, JavaFX 18 Maven project which has a lot of libraries, beside the javaFX libraries, that needs to be included in the artifact. I want to create an artifact, a jar, which contains all dependencies. I started following this video to create the jar: https://www.youtube.com/watch?v=UKd6zpUnAE4
Summarizing my steps, and referring to the steps in the video:
In IntelliJ in Project Structure/Project Settings/Libraries I removed all Maven added libraries, and added C:\Program Files\Java\javafx-sdk-18.0.2\lib
After, in Run/Edit Configurations... I added a VM options, and in that window I added
--module-path "C:\Program Files\Java\javafx-sdk-18.0.2\lib"
--add-modules javafx.controls,javafx.fxml
After, in the video, "Ken" the host of the video creates a class, with a main() method, that runs the application original main() class. I did not need this step, because I already has a class that does the same.
After, File/Project Structure/Project Settings/Artifact/ I added a JAR/From modules with dependencies/ and I choose the class I recently created, and shortened the path until the source folder (src)
Following this step, after I clicked add (+), and added the content of "...javafx-sdk-18.0.2/bin" all dll's and everything (all files).
Here, at this point, separate from the video, I also created a folder named "jars" and put all Maven dependencies jars in that folder.
According to the video, after these steps, with a double click on the artifact the jar runs without a problem.
However, I needed I more step. My dependency jars are signed jars, so I needed to open the artifact with WinRAR and remove the *.SF, *.DSA and *.RSA files. Earlier this caused me problems so I followed the idea here: Invalid signature file digest for Manifest main attributes exception while trying to run jar file, and here: "Invalid signature file" when attempting to run a .jar
After this, everything should be fine, however not :( The jar doesn't run on double click. When I run it from command line, I receive the following error:
$ java -jar jHasher.jar
jan. 15, 2023 3:19:07 DU. com.sun.javafx.application.PlatformImpl startup
WARNING: Unsupported JavaFX configuration: classes were loaded from 'unnamed module #3a178016'
javafx.fxml.LoadException:
unknown path:53
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2707)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2685)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2532)
at view.GUI.start(GUI.java:29)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:847)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:484)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:457)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:456)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:184)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at com.sun.javafx.fxml.BeanAdapter.put(BeanAdapter.java:263)
at com.sun.javafx.fxml.BeanAdapter.put(BeanAdapter.java:54)
at javafx.fxml.FXMLLoader$Element.applyProperty(FXMLLoader.java:523)
at javafx.fxml.FXMLLoader$Element.processValue(FXMLLoader.java:373)
at javafx.fxml.FXMLLoader$Element.processPropertyAttribute(FXMLLoader.java:335)
at javafx.fxml.FXMLLoader$Element.processInstancePropertyAttributes(FXMLLoader.java:245)
at javafx.fxml.FXMLLoader$ValueElement.processEndElement(FXMLLoader.java:778)
at javafx.fxml.FXMLLoader.processEndElement(FXMLLoader.java:2924)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2639)
... 11 more
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at com.sun.javafx.fxml.ModuleHelper.invoke(ModuleHelper.java:102)
at com.sun.javafx.fxml.BeanAdapter.put(BeanAdapter.java:259)
... 19 more
Caused by: java.lang.UnsupportedOperationException: Cannot resolve 'win10-document'
at org.kordamp.ikonli.AbstractIkonResolver.resolve(AbstractIkonResolver.java:61)
at org.kordamp.ikonli.javafx.IkonResolver.resolve(IkonResolver.java:73)
at org.kordamp.ikonli.javafx.FontIcon.setIconLiteral(FontIcon.java:251)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
... 22 more
I have searched the following error message. I also found some posts on StackOverflow, however they are not clear to me, and I was not able to fix this issue. Please, guide me how to proceed. All suggestions are highly appreciated.

After several hard day, I was able to create the executable jar. I'd like to share the know-how with you.
After 5th step, skipping the WinRAR for removing the *.SF, *.DSA and *.RSA files. I added maven-shade-plugin to my pom.xml. The shade plugin can automatically remove these unwanted files, but unfortunately by itself cannot create a runnable JAR, because throws again exceptions and doesn't run on double click (JavaFX 18 Maven IntelliJ: Graphics Device initialization failed for: d3d, sw Error initializing QuantumRenderer: no suitable pipeline found).
To avoid this exception and include the unlocated/missing JavaFX files we have to repack the already packed JAR. To do that, I used the spring-boot-maven-plugin. After setting up the plugins (code below), you have to run the plugins with maven in a correct order! My maven command was the following: mvn clean package spring-boot:repackage
That it, finally the created JAR (JAR of the JAR) can run on double click.
My pom.xml's corresponding parts:
Shade plugin setting:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.4.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>controller.Start</mainClass>
</transformer>
</transformers>
<minimizeJar>true</minimizeJar>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
The Spring-boot-maven-plugin setting (this should be placed outside the plugins section, at the very end of the pom.xml):
<pluginManagement>
<plugins>
<plugin>
<!-- mvn clean package spring-boot:repackage -->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
<configuration>
<classifier>spring-boot</classifier>
<mainClass>
controller.Start
</mainClass>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
Make sure to run the plugins in the correct order, as mentioned above! I found this resource very useful: https://www.baeldung.com/spring-boot-repackage-vs-mvn-package

Using postgresql driver with Maven

I tried to use following dependency in Maven:
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4-1200-jdbc4</version>
</dependency>
When I used this driver in the main method, it works, but when I installed the module and tried to run the .jar file, a ClassNotFoundException occurs. What should I do?
I call the driver in the runtime by Class.forName("org.postgresql.Driver"). I tried to change the scope in dependency to runtime, but it didn't help.
My stacktrace:
java.lang.ClassNotFoundException: org.postgresql.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:191)
at dbchecker.CountDBChecker.openConnection(CountDBChecker.java:149)
at dbchecker.CountDBChecker.main(CountDBChecker.java:165)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
I used the jar by command java -jar and also in iPOJO (like in this tutorial).
I resolved problem with jar executing by maven-assembly-plugin, but I have another connected problem with iPOJO. The jar is not executed by iPOJO and it seems like some instructions in manifest file are missing. Previous manifest:
Manifest-Version: 1.0
Export-Package: dbchecker;uses:="common,checker.service";version="1.0.
0"
iPOJO-Components: instance { $component="dbchecker.CountDBChecker" }co
mponent { $name="dbchecker.CountDBChecker" $classname="dbchecker.Coun
tDBChecker" provides { }manipulation { $classname="dbchecker.CountDBC
hecker" interface { $name="checker.service.CheckerService" }field { $
name="connection" $type="java.sql.Connection" }field { $name="dateCol
umn" $type="java.lang.String" }field { $name="dateFrom" $type="java.l
ang.String" }field { $name="dateTo" $type="java.lang.String" }field {
$name="interval" $type="long" }field { $name="maxRequired" $type="lo
ng" }field { $name="minRequired" $type="long" }field { $name="report"
$type="common.Report" }field { $name="send" $type="boolean" }field {
$name="table" $type="java.lang.String" }field { $name="zdegeokodowan
o" $type="common.Zdegeokodowano" }field { $name="zdegeokodowanoColumn
" $type="java.lang.String" }method { $name="$init" }method { $name="g
etInterval" $return="long" }method { $name="check" $return="common.Re
port" }method { $name="buildCountQuery" $return="java.lang.String" }m
ethod { $name="executeCountQuery" $return="long" $arguments="{java.la
ng.String}" $names="{query}" }method { $name="setMessage" $return="ja
va.lang.String" $arguments="{long,java.lang.String}" $names="{result}
" }method { $name="setErrorMessage" $return="java.lang.String" $argum
ents="{long,java.lang.String,long,boolean}" $names="{result,query,req
uired}" }method { $name="reportErrorMessage" $arguments="{long,java.l
ang.String,long,boolean}" $names="{result,query,required}" }method {
$name="openConnection" $return="java.sql.Connection" }}}
Bundle-Version: 1.0.0
Built-By: mk
Build-Jdk: 1.7.0_79
Tool: Bnd-1.50.0
Bundle-Name: countDBChecker
Bnd-LastModified: 1442913271587
Created-By: Apache Maven Bundle Plugin & iPOJO 1.12.1
Bundle-ManifestVersion: 2
Import-Package: org.osgi.service.log;version=1.3, common;version="[1.0
,2)", org.apache.felix.ipojo.architecture;version="[1.12.1,2.0.0)", c
hecker.service;version="[1.0,2)", org.apache.felix.ipojo;version="[1.
12.1,2.0.0)", org.osgi.service.cm;version=1.2
Bundle-SymbolicName: supervisor.countDBChecker
Recent manifest:
Manifest-Version: 1.0
Created-By: 24.79-b02 (Oracle Corporation)
Archiver-Version: Plexus Archiver
Should I change the execution goal in my pom.xml? This is the pom (part):
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-ipojo-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>ipojo-bundle</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.4</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>install</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>

Looks like your JAR doesn't contain PostgreSQL JDBC driver classes. Just specify classpath to JAR when running your app, e.g.:
java -cp postgres-jdbc.jar:myApp.jar mypackage.MyMainClass
Or use maven-assembly-plugin to build standalone JAR including PostgreSQL dependencies.

As you running .jar file - dependency libraries should be bringed by yourself (they wouldn't be packed into your jar-file).
So you should provide jar for this dependency in classpath for your running .jar file, ie you should:
provide correct manifest file with this dependency's jar as part of classpath or provide classpath for dependecy's jar as part of command line
copy this dependency's jar to target folder

main class exception when running db2triples for the first time

I'm trying to use db2triples for the first time, which is a java / maven project.
I got information about it from its github page.
So far, I have performed the following steps:
cd /programs/db2triples-master
vim pom.xml and added the db2triples dependency
mvn compile
mvn package
mvn dependency:copy-dependencies
java -cp target/dependency/*.jar:target/db2triples-1.0.3-SNAPSHOT.jar net.antidot.semantic.rdf.rdb2rdf.main.Db2triples
And I get this error:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/cli/ParseException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2693)
at java.lang.Class.privateGetMethodRecursive(Class.java:3040)
at java.lang.Class.getMethod0(Class.java:3010)
at java.lang.Class.getMethod(Class.java:1776)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.cli.ParseException
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
After googling around, this may be a classpath error, but I'm not sure. What needs to be done in order to run this application?

The error means that when you run db2triples, it can't find a dependency that is needed.
One way to resolve this problem is to add the required dependencies to your class path. Is the apache commons cli jar actually sitting in target/dependencies?
Another way to resolve this is to build a jar that has all the dependencies embedded. The assembly plugin as a jar-with-dependencies descriptor. Add this to your <build><plugins> section in your pom.
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.5.3</version>
<configuration>
<descriptorId>jar-with-dependencies</descriptorId>
</configuration>
</plugin>
To build it mvn assembly:assembly.
You should have another jar sitting in targets named something like db2triples-<version>-jar-with-dependencies.jar. Then to run the application, you just need to run java -cp dbp2triples-<version>-jar-with-dependencies.jar net.antidot.semantic.rdf.rdb2rdf.main.Db2triples

According to your linked github page, you should get the required dependencies
Needed dependency
OpenRdf Sesame > 2.6.x - http://www.openrdf.org/
Commons-cli > 1.2 - http://commons.apache.org/cli/
Commons-logging > 1.1.1 - http://commons.apache.org/logging/
Or, if you're using maven, add db2triples as a dependency to your pom
<dependency>
<groupId>net.antidot</groupId>
<artifactId>db2triples</artifactId>
</dependency>

Build executable JAR for Gatling load test

I am new to Gatling (2.1.2) and want to do a small prototype project to show to my colleagues.
According to the quick start page, there are several ways I can run a simulation with Gatling:
decompress the Gatling bundle into a folder and drop my simulation files into user-files/simulations folder. bin/gatling.sh will compile and run the simulation files.
use the gatling-maven-plugin maven plugin to execute the simulation.
create a project with gatling-highcharts-maven-archetype, and run the Engine class.
and I found those problems
For 1, it is hard to add dependencies for simulation classes. I have to figure out what the jars are needed and drop them to the lib folder.
For 2, it requires maven to be installed.
For 3, it only runs from an IDE
I just want a simple executable JAR file with all the dependencies bundled together (my simulation, Gatling and third party), and run it from any machine (like EC2 instances).
Is there a way to achieve this?
Update 1:
I tried method 3, but moving all the project files from test folder to main, and used maven-assembly-plugin to build a jar with dependencies. When I tried to run the file, I got the following error:
Exception in thread "main" java.lang.ExceptionInInitializerError
at Engine$.delayedEndpoint$Engine$1(Engine.scala:7)
at Engine$delayedInit$body.apply(Engine.scala:4)
at scala.Function0$class.apply$mcV$sp(Function0.scala:40)
at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
at scala.App$$anonfun$main$1.apply(App.scala:76)
at scala.App$$anonfun$main$1.apply(App.scala:76)
at scala.collection.immutable.List.foreach(List.scala:381)
at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35)
at scala.App$class.main(App.scala:76)
at Engine$.main(Engine.scala:4)
at Engine.main(Engine.scala)
Caused by: java.nio.file.FileSystemNotFoundException
at com.sun.nio.zipfs.ZipFileSystemProvider.getFileSystem(ZipFileSystemProvider.java:171)
at com.sun.nio.zipfs.ZipFileSystemProvider.getPath(ZipFileSystemProvider.java:157)
at java.nio.file.Paths.get(Paths.java:143)
at io.gatling.core.util.PathHelper$.uri2path(PathHelper.scala:32)
at IDEPathHelper$.<init>(IDEPathHelper.scala:7)
at IDEPathHelper$.<clinit>(IDEPathHelper.scala)
... 11 more
I guess this is something to do with Gatling configuration, but don't know what has gone wrong.

I tried to do something similar. I could not use Maven as well. I will try to remember how I did this.
1) I have configured maven-assembly-plugin to generate single JAR with dependencies like this:
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
You need to ensure all required libraries (gatling, scala runtime, zinc compiler) are present on your resulting classpath.
2) Check the scope of your dependencies as Maven packs only classes defined with scope=compile by default. The most simple way is probably to use no test dependencies.
3) Create a launch script, e.g. launch.sh. It should contain something like this:
#!/bin/sh
USER_ARGS="-Dsomething=$1"
COMPILATION_CLASSPATH=`find -L ./target -maxdepth 1 -name "*.jar" -type f -exec printf :{} ';'`
JAVA_OPTS="-server -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms512M -Xmx2048M -XX:+HeapDumpOnOutOfMemoryError -XX:+AggressiveOpts -XX:+OptimizeStringConcat -XX:+UseFastAccessorMethods -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv6Addresses=false ${JAVA_OPTS}"
java $JAVA_OPTS $USER_ARGS -cp $COMPILATION_CLASSPATH io.gatling.app.Gatling -s your.simulation.FullClassName
To explain, I took gatling`s own launch script for inspiration. Note mainly the presence of target directory in classpath parameter definition.
4) Compile your compiled target directory and launch.sh to a single directory and distribute this (e.g. as archive). Then you can the scenarios by executing ./launch.sh.
I know this is not a standard solution, but it worked for me. Hopefully it will help you too. If you have any problems or tips to improve, please share with us.

I think is a bit late for that but I face kinda the same problem related here, but instead to use maven I used gradle. Guess that the approach it's the same, a bit mix of the first solution and something or my own.
First, define a gradle build file with gatling dependencies and a task to build a fatjar
apply plugin: 'scala'
version 0.1
dependencies {
compile group: 'io.gatling', name: 'gatling-test-framework', version: '2.1.7'
compile group: 'com.typesafe.akka', name: 'akka-actor_2.11', version: '2.4.7'
compile group: 'org.scala-lang', name: 'scala-library', version: '2.11.7'
}
repositories{
mavenCentral()
mavenLocal()
}
task fatJar(type: Jar) {
manifest {
attributes 'Implementation-Title': 'Preparing test',
'Implementation-Version': version,
'Main-Class': 'io.gatling.app.Gatling'
}
baseName = project.name + '-all'
from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } } {
exclude 'META-INF/MANIFEST.MF'
exclude 'META-INF/*.SF'
exclude 'META-INF/*.DSA'
exclude 'META-INF/*.RSA'
}
with jar
}
That task executed as
gradle clean build fatJar
will generate a self contained jar which will run the Gatling main class as default. So tell it witch test you want to run is made with the standard '-s' parameter.
So last step is create, if you want, a script to run it. I will "steal" the script for the first comment and change a bit
#!/bin/sh
if [ -z "$1" ];
then
echo "Test config tool"
echo
echo "Running Parameters : "
echo
echo " <Config file> : Test definition file. Required"
echo
exit 0;
fi
USER_ARGS="-DCONFIG_FILE=$1"
JAVA_OPTS="-server -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms512M -Xmx2048M -XX:+HeapDumpOnOutOfMemoryError -XX:+AggressiveOpts -XX:+OptimizeStringConcat -XX:+UseFastAccessorMethods -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv6Addresses=false ${JAVA_OPTS}"
java $JAVA_OPTS $USER_ARGS -jar test-project-all-0.1.jar -s FunctionalTestSimulation -nr
In my case I will run the same test with different, easy to configure, parameters so my Simulation is always the same.
All my scala files are compiled by gradle and package in the jar that's mean they are in the classpath, changing the "FunctionalTestSimulation" name for a Script variable make easy adapt this script for something more generic.
Guess that make a Maven version will be easy.
Hope that help somebody.
Update with folder structure
After a request will add an small draft of the folder structure for the project:
test-project
|_ build.gradle
|_ src
|_ main
|_ scala
|_ resources
|_ runSimulation.sh
|_ configFile.conf
When have time will provide a link to my github with a working one.
Cheers

You can always create a simple Java class that starts Gatling with the Gatling.fromArgs. With this setup you can have all in just one happy executable jar. Let this class be the jar mainClass instead of "io.gatling.app.Gatling". This example is for a scala simulation class "my.package.MySimulation".
import scala.Option;
import io.gatling.app.Gatling;
import io.gatling.core.scenario.Simulation;
public class StartSimulation {
public static void main(String[] args) {
Gatling.fromArgs(new String[]{}, new Option<Class<Simulation>>() {
private static final long serialVersionUID = 1L;
#Override
public int productArity() {
return 0;
}
#Override
public Object productElement(int arg0) {
return null;
}
#SuppressWarnings("unchecked")
#Override
public Class<Simulation> get() {
try {
return (Class<Simulation>) Class.forName("my.package.MySimulation");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
return null;
}
#Override
public boolean isEmpty() {
return false;
}
#Override
public boolean canEqual(Object o) {
return false;
}
});
}
}

I had a similar issue, I fixed it as following:
Inside Gatling package there is bin/ and take a look at gatling.sh. You see that it simply adds certain configurations into classpath and then runs io.gatling.app.Gatling class in gatling-compiler-<version_number>.jar. So, all you need to do is to make a jar that includes compiler, add configurations and tests to classpath and run io.gatling.app.Gatling.
steps:
add compiler dependency:
<dependency>
<groupId>io.gatling</groupId>
<artifactId>gatling-compiler</artifactId>
<version>${gatling.version}</version>
</dependency
create jar with dependencies:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.4.1</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<finalName>${project.build.finalName}</finalName>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
create test jar (this includes your gatling tests)
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
<configuration>
<excludes>
<exclude>src/test/resources/*</exclude>
</excludes>
<finalName>${project.build.finalName}</finalName>
</configuration>
</execution>
</executions>
</plugin>
create a package out of your configuration. You can use maven assembly for that. What I usually do, is to create a separate module that handles creating the package for different environments. This package contains your gatling.conf, logback.xmland all the other resources you application wants including test data.
Now you basically have three packages: application.jar, application-tests.jar and application-conf.zip.
Unzip application-conf.zip, copy application.jarand application-tests.jarin the same folder.
In this folder, You need to create target/test-classes/ folder, just
leave it empty. In my case, it was required. I think you can some how
change that in gatling.conf. But I am not sure how.
Run
java -cp ".:application-test.jar:application.jar" io.gatling.app.Gatling

I use IntelliJ Idea and I got this fixed by right clicking on the scala folder > Mark Directory as > Test Sources Root . Now Execute "Engine" and you will be all good !

I've recently blogged about this Creating a versionable, self-contained (fat-/uber-) JAR for Gatling tests, the source of which can be found in jamietanna/fat-gatling-jar.
For a Maven project, the steps would be as follows.
The main things you need are to add the dependency on gatling-charts-highcharts:
<project>
<!-- ... -->
<dependencies>
<dependency>
<groupId>io.gatling.highcharts</groupId>
<artifactId>gatling-charts-highcharts</artifactId>
<version>${gatling.version}</version>
</dependency>
</dependencies>
</project>
Next, you need to make sure your Gatling scenarios/simulations are in src/main instead of src/test.
Finally, you can use the maven-shade-plugin to build an executable JAR which uses Gatling's CLI runner as the mainClass:
<project>
<!-- ... -->
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.1.1</version>
<configuration>
<filters>
<!-- https://stackoverflow.com/a/6743609 -->
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>io.gatling.app.Gatling</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

different ways of adding Jar/setting classpath in Unix

I am a java beginner.
I am trying a Java program in a unix system.
I am getting the below error
Exception in thread "main" java.lang.ClassNotFoundException: com.sybase.jdbc.SybDriver
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at reportToCSVg.main(reportToCSVg.java:13)
I know that in eclipse i can just add the jconn.jar to make it work. please advise me the equivalent i need to do such that whenever i run the program in the server, i had included the jar file which is in a another path

you can set the classpath as follow: http://www.ehow.com/how_4784820_set-classpath-eclipse.html
and put your jar file in your projects classpath .
or you can put your jar file as
Select the library and click "Edit" (left side of the window)
Click "User Libraries"
Select the library again and click "Add JARs"
http://www.wikihow.com/Add-JARs-to-Project-Build-Paths-in-Eclipse-(Java)

You can use Maven to package your -jar file containing all the dependencies if you are using Maven.
If you are using plain Eclipse with Ant -Just use the Fat-jar Plugin.
For Maven add the assembly plugin to pom.xml
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>app.runner.Runner</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
For the Maven goal use the below -
maven assembly:single