From 7c3082a0930e7937c0507021fc0ca6a2d25e1d0a Mon Sep 17 00:00:00 2001
From: Gian Mario Contessa <gmcontessa@hedgingbeta.com>
Date: Fri, 24 May 2019 08:09:59 +0100
Subject: [PATCH] BAEL-2899: project structure and example classes

---
 java-groovy-joint/pom.xml                     | 132 ++++++++++++++++++
 .../main/groovy/com.baeldung/CalcMath.groovy  |  19 +++
 .../groovy/com.baeldung/CalcScript.groovy     |  19 +++
 .../src/main/java/com/baeldung/App.java       |  54 +++++++
 4 files changed, 224 insertions(+)
 create mode 100644 java-groovy-joint/pom.xml
 create mode 100644 java-groovy-joint/src/main/groovy/com.baeldung/CalcMath.groovy
 create mode 100644 java-groovy-joint/src/main/groovy/com.baeldung/CalcScript.groovy
 create mode 100644 java-groovy-joint/src/main/java/com/baeldung/App.java

diff --git a/java-groovy-joint/pom.xml b/java-groovy-joint/pom.xml
new file mode 100644
index 0000000000..67365cf999
--- /dev/null
+++ b/java-groovy-joint/pom.xml
@@ -0,0 +1,132 @@
+<?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>
diff --git a/java-groovy-joint/src/main/groovy/com.baeldung/CalcMath.groovy b/java-groovy-joint/src/main/groovy/com.baeldung/CalcMath.groovy
new file mode 100644
index 0000000000..d9709653c7
--- /dev/null
+++ b/java-groovy-joint/src/main/groovy/com.baeldung/CalcMath.groovy
@@ -0,0 +1,19 @@
+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")
+    }
+}
\ No newline at end of file
diff --git a/java-groovy-joint/src/main/groovy/com.baeldung/CalcScript.groovy b/java-groovy-joint/src/main/groovy/com.baeldung/CalcScript.groovy
new file mode 100644
index 0000000000..2278f0dab8
--- /dev/null
+++ b/java-groovy-joint/src/main/groovy/com.baeldung/CalcScript.groovy
@@ -0,0 +1,19 @@
+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")
+    }
+}
\ No newline at end of file
diff --git a/java-groovy-joint/src/main/java/com/baeldung/App.java b/java-groovy-joint/src/main/java/com/baeldung/App.java
new file mode 100644
index 0000000000..0a201d12e2
--- /dev/null
+++ b/java-groovy-joint/src/main/java/com/baeldung/App.java
@@ -0,0 +1,54 @@
+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);
+    }
+}