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@thomasdarimont
Last active May 13, 2022 12:40
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Example for defining a refreshable Groovy Script in Spring Boot with Java Config - at least thats the current state of affairs :)
package demo;
import java.util.concurrent.TimeUnit;
import org.springframework.aop.TargetSource;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.support.DelegatingIntroductionInterceptor;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.core.io.ClassPathResource;
import org.springframework.scripting.groovy.GroovyScriptFactory;
import org.springframework.scripting.support.RefreshableScriptTargetSource;
import org.springframework.scripting.support.ResourceScriptSource;
@SpringBootApplication
public class App {
public static void main(String[] args) throws Exception{
Evaluator evaluator = SpringApplication.run(App.class, args).getBean("evaluator", Evaluator.class);
for (int i = 0; i < 20; i++) {
System.out.printf("evaluated to %s%n", evaluator.evaluate(null));
TimeUnit.SECONDS.sleep(1);
}
}
@Bean
public Evaluator evaluator(BeanFactory beanFactory) throws Exception {
GroovyScriptFactory factory = new GroovyScriptFactory("classpath");
factory.setBeanFactory(beanFactory);
ResourceScriptSource script = new ResourceScriptSource(new ClassPathResource("GroovyEvaluator.groovy"));
RefreshableScriptTargetSource rsts = new RefreshableScriptTargetSource(beanFactory, "ignored-bean-name", factory, script, false) {
@Override
protected Object obtainFreshBean(BeanFactory beanFactory, String beanName) {
/*
* we ask the factory to create a new script bean directly instead
* asking the beanFactory for simplicity.
*/
try {
return factory.getScriptedObject(script);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
};
rsts.setRefreshCheckDelay(1000L);
ProxyFactory proxyFactory = new ProxyFactory();
proxyFactory.setTargetSource(rsts);
proxyFactory.setInterfaces(Evaluator.class);
DelegatingIntroductionInterceptor introduction = new DelegatingIntroductionInterceptor(rsts);
introduction.suppressInterface(TargetSource.class);
proxyFactory.addAdvice(introduction);
return (Evaluator) proxyFactory.getProxy();
}
}
package demo;
public interface Evaluator {
boolean evaluate(Object arg);
}
class GroovyEvaluator implements demo.Evaluator{
def boolean evaluate(arg) {
return true;
}
}
<?xml version="1.0" encoding="UTF-8"?>
<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>demo</groupId>
<artifactId>spring-boot-groovy-reloading-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-boot-groovy-reloading-demo</name>
<description>Demo project for Groovy reloading Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.0.M5</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>
@PowerStat
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Would be nice to have a complete maven directory structure - at least in the download zip.

@huotaihe
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Would be nice to have a complete maven directory structure - at least in the download zip.

You can do it

@megabites2013
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GroovyEvaluator.groovy should be in the resource folder, FYI

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