BAEL-5957: Creaet prime number finder for Kubernetes heap dump (#13190)
* BAEL-5957: Creaet prime number finder for Kubernetes heap dump * add dockerfile, kubernetes deploy file * use baeldung namespace * add saving primes to a list
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FROM adoptopenjdk:11-jre-hotspot
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ARG JAR_FILE=target/*.jar
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COPY ${JAR_FILE} application.jar
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ENTRYPOINT ["java", "-jar", "application.jar"]
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>k8s-java-heap-dump</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>kubernetes-modules</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.1</version>
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<configuration>
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<!-- http://maven.apache.org/plugins/maven-compiler-plugin/ -->
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-jar-plugin</artifactId>
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<version>${maven-jar-plugin.version}</version>
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<configuration>
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<archive>
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<manifest>
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<mainClass>com.baeldung.kubernetes.heap.dump.PrimeNumberFinder</mainClass>
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</manifest>
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</archive>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<properties>
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<client-java.version>11.0.0</client-java.version>
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</properties>
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</project>
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apiVersion: v1
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kind: Pod
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metadata:
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name: prime-number-finder-pod
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spec:
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containers:
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- name: prime-number-finder
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image: baeldung/prime-number:latest
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package com.baeldung.kubernetes.heap.dump;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.stream.IntStream;
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public class PrimeNumberFinder {
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public static void main(String[] args) {
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List<Integer> primes = new ArrayList<>();
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int maxNumber = Integer.MAX_VALUE; // set to huge to make it run a long time
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for (int i = 2; i < maxNumber; i++) {
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if (isPrime(i)) {
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System.out.println(i);
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primes.add(i);
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}
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}
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}
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private static boolean isPrime(int number) {
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return IntStream.rangeClosed(2, (int) (Math.sqrt(number)))
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.allMatch(n -> number % n != 0);
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}
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}
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<module>k8s-intro</module>
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<module>k8s-admission-controller</module>
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<!-- <module>kubernetes-spring</module> --> <!-- JDK-11 Module -->
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<module>k8s-java-heap-dump</module>
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</modules>
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</project>
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