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BAEL-2899: project structure and example classes

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Gian Mario Contessa 2019-05-24 08:09:59 +01:00
parent 1e562ed97c
commit 7c3082a093
4 changed files with 224 additions and 0 deletions
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132
java-groovy-joint/pom.xml Normal file
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<?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>
<artifactId>java-groovy-joint</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>java-groovy-joint</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<commons-lang3.version>3.9</commons-lang3.version>
<java.version>1.8</java.version>
<maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
<logback.version>1.2.3</logback.version>
<groovy.version>2.5.7</groovy.version>
</properties>
<pluginRepositories>
<pluginRepository>
<id>bintray</id>
<name>Groovy Bintray</name>
<url>https://dl.bintray.com/groovy/maven</url>
<releases>
<updatePolicy>never</updatePolicy>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>${groovy.version}</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<!-- Build an executable JAR -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.1.2</version>
<configuration>
<archive>
<manifest>
<mainClass>com.baeldung.App</mainClass>
<addClasspath>true</addClasspath>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<compilerId>groovy-eclipse-compiler</compilerId>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<version>3.3.0-01</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-batch</artifactId>
<version>${groovy.version}-01</version>
</dependency>
</dependencies>
</plugin>
<!-- Maven Assembly Plugin: needed to run the jar through command line -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<!-- get all project dependencies -->
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<!-- MainClass in mainfest make a executable jar -->
<archive>
<manifest>
<mainClass>com.baeldung.App</mainClass>
</manifest>
</archive>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<!-- bind to the packaging phase -->
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

19
java-groovy-joint/src/main/groovy/com.baeldung/CalcMath.groovy Normal file
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package com.baeldung
import org.slf4j.LoggerFactory
class CalcMath {
def log = LoggerFactory.getLogger(this.getClass())
def calcSum(x, y) {
log.info "Executing $x + $y"
x + y
}
def calcSum2(x, y) {
log.info "Executing $x + $y"
// DANGER! This won't throw a compilation issue and fail only at runtime!!!
calcSum3()
log.info("Logging an undefined variable: $z")
}
}

19
java-groovy-joint/src/main/groovy/com.baeldung/CalcScript.groovy Normal file
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package com.baeldung
import org.slf4j.LoggerFactory
abstract class CalcScript extends Script {
def log = LoggerFactory.getLogger(this.getClass())
def calcSum(x, y) {
log.info "Executing $x + $y"
x + y
}
def calcSum2(x, y) {
log.info "Executing $x + $y"
// DANGER! This won't throw a compilation issue and fail only at runtime!!!
calcSum3()
log.info("Logging an undefined variable: $z")
}
}

54
java-groovy-joint/src/main/java/com/baeldung/App.java Normal file
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package com.baeldung;
import groovy.lang.Binding;
import groovy.lang.GroovyClassLoader;
import groovy.lang.GroovyShell;
import org.codehaus.groovy.control.CompilerConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Hello world!
*
*/
public class App {
private final static Logger LOG = LoggerFactory.getLogger(App.class);
private final GroovyClassLoader loader;
private final GroovyShell shell;
private App() {
loader = new GroovyClassLoader(this.getClass().getClassLoader());
CompilerConfiguration config = new CompilerConfiguration();
config.setScriptBaseClass("com.baeldung.CalcScript");
shell = new GroovyShell(loader, new Binding(), config);
}
private void runScript(int x, int y) {
Object script = shell.parse(String.format("calcSum(%d,%d)", x, y));
assert script instanceof CalcScript;
Object result = ((CalcScript) script).run();
LOG.info("Result of run() method is {}", result);
Object script2 = shell.parse("CalcScript");
Object result2 = ((CalcScript) script2).calcSum(x + 7, y + 7);
LOG.info("Result of calcSum() method is {}", result2);
}
private void runClass(int x, int y) throws ClassNotFoundException, IllegalAccessException, InstantiationException {
Class calcClass = loader.loadClass("com.baeldung.CalcMath");
Object calc = calcClass.newInstance();
assert calc instanceof CalcMath;
Object result = ((CalcMath) calc).calcSum(x, y);
LOG.info("Result is {}", result);
}
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
App app = new App();
LOG.info("Running a groovy script...");
app.runScript(5, 10);
LOG.info("Running a groovy class...");
app.runClass(1, 3);
}
}