marp	theme	class
true	firat-theme	lead invert

About

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The question is

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What we can do?

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So what is the solution?

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What is GraalVM ?

GraalVM is a high-performance JDK distribution designed to accelerate the execution of applications written in Java and other JVM languages along with support for JavaScript, Ruby, Python and a number of other popular languages. GraalVM’s polyglot capabilities make it possible to mix multiple programming languages in a single application while eliminating foreign language call costs. GraalVM created by Oracle. The first production-ready version, GraalVM 19.0, was released in May 2019. There is no equivalent technology what GraalVM do.

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What can GraalVM give me?

• Mix multiple programming languages in a single application
• Native executables
• Amazingly fast boot time
• Incredibly low RSS memory (not just heap size!)
• Instant (relatively) scale up and high density memory utilization in container orchestration platforms like Kubernetes.

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GraalVM Architecture

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Native Image

The native executable for our application will contain the application code, required libraries, Java APIs, and a reduced version of a VM. The smaller VM base improves the startup time of the application and produces a minimal disk footprint.

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Truffle language implementation framework

The Truffle language implementation framework (henceforth “Truffle”) is an open source library for building tools and programming languages implementations as interpreters for self-modifying Abstract Syntax Trees. Together with the open source GraalVM compiler, Truffle represents a significant step forward in programming language implementation technology in the current era of dynamic languages.

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Supported Frameworks and Tech

• Spring Framework (Experimental)
• Quarkus
• Play Framework
• Camel
• Prometheus
• JavaFX ...

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Disadvantages

• The main downside of this approach is the platform-depended native code.

That means you need to compile source code for linux/windows etc.

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Meanwhile ??

SystemAdmin01: server_api.so doesn't work on my server !

Customer$$$__: customer_api.exe doesn't work on my pc !

DevGuy42_____: api.jar works on my workstation !

Fırat________: In some cases, problems may arise from the libraries or build scripts used. In other words, it is necessary to pay attention to tests.

SystemAdmin01: hımm, server_api.so doest work on my server !

...........................................

DevGuy42 writing ...

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Sample Application

Download and install GraalVM from oracle downloads. Create an Example.java file.

public class Example {

    public static void main(String[] args) {
        System.out.println("Hello GraalVM");
    }
}

#Run following commands :
javac Example.java
native-image Example

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Tests : Sure

package org.acme.quickstart;


import io.quarkus.test.junit.NativeImageTest;

@NativeImageTest 
public class NativeGreetingResourceIT extends GreetingResourceTest { 
    // Run the same tests
}

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Performance

Quarkus Test

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Features Support

GraalVM technologies are distributed as production-ready and experimental.

Experimental features are being considered for future versions of GraalVM and are not meant to be used in production. The development team welcomes feedback on experimental features, but users should be aware that experimental features might never be included in a final version, or might change significantly before being considered production-ready.

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After that knowage i tried to make a demo application for my individual requirement.

Firstly i have prefer a desktop application with stylish UI. (relatively:))

That means the application sadly use a lot of memory. So i need to use JavaFX also Gluon(a native JavaFX solution) for improve to performance .

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What I did for graalvm integration?

For that integration i have only added a plugin to my maven pom. Surprisingly that is enough for the integration.

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<plugin>
	<groupId>com.gluonhq</groupId>
	<artifactId>gluonfx-maven-plugin</artifactId>
	<version>1.0.2</version>
	<configuration>
		<target>host</target>
		<mainClass>com.gnosis.cuteoverlay.Application</mainClass>
		<reflectionList>
			<list>com.gnosis.cuteoverlay.Application</list>
			<list>com.gnosis.cuteoverlay.DataToSend</list>
			<list>com.gnosis.cuteoverlay.DataToSendContainer</list>
		</reflectionList>
		<graalvmHome>C:\dev\tools\graalvm-svm-windows-gluon-21.2.0-dev</graalvmHome>
		<nativeImageArgs>
			<imageArg>-Dio.netty.noUnsafe=true</imageArg>
			<imageArg>--report-unsupported-elements-at-runtime</imageArg>
			<imageArg>--allow-incomplete-classpath --enable-all-security-services</imageArg>
			<imageArg>--enable-url-protocols=https -H:EnableURLProtocols=http</imageArg>
			<imageArg>-H:TraceClassInitialization=true</imageArg>
			<imageArg>--initialize-at-build-time=${buildtime-classes}</imageArg>
			<imageArg>--initialize-at-run-time=${runtime-classes}</imageArg>
		</nativeImageArgs>
	</configuration>
</plugin>

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The main time spending problem is dedicating build and runtime classes also classes what used by Java's reflection. Also that lists depend on what libraries you used.

After several tries, the native image prepared successfully.

#creates native image
mvn gluonfx:build

After that, i created a distribution folder than copied the native image and all other executables what i need to run business logic.

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And finally

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Startup time metrics from the app

# Jar Log
Uptime:781ms
StartTime:Wed Jun 30 02:02:09 EET 2021
Max heap memory is 4086 MBytes
Used non-heap memory is 32 MBytes

# Native Image(exe) Log
Uptime:1ms
StartTime:Wed Jun 30 02:06:14 TRT 2021
Max heap memory is 0 MBytes
Used non-heap memory is 0 MBytes

Lightning fast jvm startup time !

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OS memory usages by the app

We have 200MB saving from memory usage !

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Special thanks to

• Oracle, Quarkus, JavaFX / GluonHQ, Spring
• Google and Wiki
• 

You can reach the source code and windows builds via git.

https://github.com/firatgursoy/CuteOverlay