Have built a native-image using Spring Boot 3.0.1 and GraalVM 22.3.0. The built native-image size is atleast twice as that of the original application jar.
I'm with the understanding if unused classes are removed as part of the native-image build process, it should be lesser in size.
If you look closer to the documentation you will understand
A GraalVM Native Image is a complete, platform-specific executable.
You do not need to ship a Java Virtual Machine in order to run a
native image.
So a GraalVm Native Image, contains both the application and the dependencies needed for this container to execute. Without Native image you normally had as JAR just the application and the embedded tomcat. You did not had inside this JAR the JRE or JDK, required to run the JAR file.
The above could also be verified from graalVm.
Native Image is a technology to compile Java code ahead-of-time to a
binary – a native executable. A native executable includes only the
code required at run time, that is the application classes,
standard-library classes, the language runtime, and statically-linked
native code from the JDK.
The language runntime in case for java and jdk are normally between 100mb - 200mb. The graalVm probably reduces this size but not in huge size. So the native executable image is increased by even 1 hundred Mbs just from that.
Related
I am new to the Quarkus, Is it possible to pick up any library from the Maven repository and use into Quarkus app.
or i can only use these Code.
Is there any impact on performance?
If you plan on building a Java app deployed on the JVM, you should be able to use any library.
Things are a bit different if you plan to build a native executable. In this case, a library might need some additional metadata for GraalVM. That's one of the things we do in our Quarkus extensions.
I am using a third-party library in my quarkus project. This third-party library has a transitive dependency which includes some inner resources.
These resources are loaded at runtime, and seem to work when executing my quarkus project in dev mode, however, when running the built native image, these resources are not found.
Is there a way to include this transitive dependency resources in the built native image? I tried to specifically include the library in my gradle dependency but that did not work.
Thanks.
By default, the resources are not included in the native image.
You need to include them yourself.
See our extensive documentation about the various issues you can have with GraalVM native executable and how to solve them here: https://quarkus.io/guides/writing-native-applications-tips#including-resources (the link points to your specific issue but better read the whole doc for a global understanding).
I use IntelliJ IDEA IDE and I want use the Gradle system as a build system in my JavaFX application. I want to create preloader for my program and pack it with program into one jar file. Here says that I must have at least two modules: application and preloader. How build the JavaFX application with preloader by using gradle system?
Disclaimer: I'm the creator and maintainer of the javafx-gradle-plugin.
You don't need to create some preloader, it is used while the JVM loads the libraries and while booting all classloaders, but you don't have to create some preloader.
There is a conflict in interests here: you are using two systems to generate that javafx-appliaction, one is the gradle-build-system, the other is your IntelliJ IDEA-IDE. There is a JavaFX-plugin for IDEA, which does some things, and there is the gradle-plugin i wrote, which does some things withing normal gradle-development-cycle.
The javafx-gradle-plugin is IDE-agnostic, so you are not required to have some IDEA-plugins enabled.
To have some example with included usage of proguard, you can see it at github.
What is the best way to create a JRuby JAR file that contains compiled JRuby code to be used in a larger Java application, especially with Maven. It seems that most of the use cases with JRuby are to build apps at the top of the stack and integrate legacy Java code. So most of the documentation and resources are around building WAR files and standalone JARs. Both warbler and rawr build standalone JARs.
We have to take a slightly different approach of putting JRuby right in the middle of the stack, so I want to build reusable JARs that can be uploaded to an internal Maven repo and use them as dependencies the same way I do with any Java code. There's not much documentation on how to do this and I've only come up with:
Write a Rake task to jrubyc compile the JRuby files and stuff them into a JAR file
Try something like buildr or gradle to do the packaging
Has anyone done this before? Any recommendations on which approach I should take or better approaches? Thank you.
I need to use JavaFx on my macbook pro. Im using netbeans 7.1.
Currently when i compile my javafx program that I created on windows it gives me this error.
The J2SE Platform is not correctly set up.
Your active platform is: Default_JavaFX_Platform, but the corresponding property "platforms.Default_JavaFX_Platform.home" is not found in the project's properties files.
Either open the project in the IDE and setup the Platform with the same name or add it manually.
For example like this:
ant -Duser.properties.file= jar (where you put the property "platforms.Default_JavaFX_Platform.home" in a .properties file)
or ant -Dplatforms.Default_JavaFX_Platform.home= jar (where no properties file is used)
BUILD FAILED (total time: 0 seconds)
The latest versions of Java from Oracle have JavaFx 2.x included:
http://www.oracle.com/technetwork/java/javase/downloads/index.html
The stand-alone version of JavaFX for Java 6 appears to be available only for Windows (at least from the official download link).
If you want to avoid potential litigation by Oracle, the safe choice here would be to install OpenJDK, JDK's fully featured open-source build.
You can get it from https://adoptopenjdk.net/.