main
Sandro Leuchter 2025-01-07 15:11:58 +01:00
parent f6c4ac8bcc
commit e84d9f0d0a
4 changed files with 213 additions and 0 deletions

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# Justfile (https://just.systems/) for starting Maven standard targets
default: clean compile
#!/usr/bin/env bash
cd target/classes
java --enable-preview pp.Exec
exec class args: compile
mvn exec:java -Dexec.args="{{args}}" -Dexec.mainClass={{class}}
# exec class args:
# java -cp target/app.jar {{class}} {{args}}
clean:
mvn clean
compile:
mvn compile
test: compile
mvn test
javadoc:
mvn javadoc:javadoc
package:
mvn package

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>pp</groupId>
<artifactId>pp.09.02-StructuredConcurrency</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<maven.compiler.release>23</maven.compiler.release>
<lombok.version>edge-SNAPSHOT</lombok.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency><!-- für Unit-Tests -->
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.10.0</version>
<scope>test</scope>
</dependency>
<dependency><!-- für Lombok -->
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency><!-- für net.jcip Annotationen -->
<groupId>net.jcip</groupId>
<artifactId>jcip-annotations</artifactId>
<version>1.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin><!-- für Unit-Tests [mvn test] -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<argLine>--enable-preview</argLine>
</configuration>
</plugin>
<plugin><!-- [mvn compile] -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.9.0</version>
<configuration>
<compilerArgs>--enable-preview</compilerArgs>
<annotationProcessorPaths>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
<plugin><!-- [mvn exec:java] -->
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<argLine>--enable-preview</argLine>
</configuration>
</plugin>
<plugin><!-- [mvn javadoc:javadoc] -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>3.5.0</version>
<configuration>
<show>private</show>
<locale>en_US</locale>
</configuration>
</plugin>
</plugins>
</build>
</project>

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<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>pp</groupId>
<artifactId>pp.09.02-StructuredConcurrency</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<maven.compiler.release>21</maven.compiler.release>
<lombok.version>edge-SNAPSHOT</lombok.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency><!-- für Unit-Tests -->
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.10.0</version>
<scope>test</scope>
</dependency>
<dependency><!-- für Lombok -->
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency><!-- für net.jcip Annotationen -->
<groupId>net.jcip</groupId>
<artifactId>jcip-annotations</artifactId>
<version>1.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin><!-- für Unit-Tests [mvn test] -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.0.0</version>
</plugin>
<plugin><!-- [mvn compile] -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.11.0</version>
<configuration>
<annotationProcessorPaths>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</path>
</annotationProcessorPaths>
<compilerArgs>
<arg>--enable-preview</arg>
</compilerArgs>
</configuration>
</plugin>
<plugin><!-- [mvn exec:exec] -->
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<executable>java</executable>
<arguments>
<argument>-classpath</argument>
<argument>target/classes</argument>
<argument>--enable-preview</argument>
<argument>io.dama.ffi.structconc.Exec</argument>
</arguments>
</configuration>
</plugin>
<plugin><!-- [mvn javadoc:javadoc] -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>3.5.0</version>
<configuration>
<show>private</show>
<locale>en_US</locale>
</configuration>
</plugin>
</plugins>
</build>
</project>

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package pp;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.StructuredTaskScope;
public class Exec<T> {
static <T> T race(List<Callable<T>> tasks) throws InterruptedException, ExecutionException {
try (var scope = new StructuredTaskScope.ShutdownOnSuccess<T>()) {
for (var task : tasks) {
scope.fork(task);
}
return scope.join().result();
}
}
public static void main(String... args)
throws InterruptedException, TimeoutException, Throwable {
var tasks = new ArrayList<Callable<BigInteger>>();
for (var i = 0; i < Runtime.getRuntime().availableProcessors() - 1; i++) {
tasks.add(() -> BigInteger.probablePrime(2048, ThreadLocalRandom.current()));
}
System.out.println(race(tasks));
}
}