Initial commit with basic class and object creation for a jruby extension.

Pere Urbon-Bayes · Pere Urbon-Bayes · commit e9938857fa3b · 2015-08-24T23:42:14.000+02:00
diff --git a/extensions/basic/README.md b/extensions/basic/README.md
@@ -0,0 +1,8 @@
+## JRuby Extensions basic concepts
+
+This project aims to demo small and easy concepts around jruby extensions, this concepts will be listed as
+
+* Classes and Modules
+* Static methods in both elements
+* Loading the extensions
+* ...
diff --git a/extensions/basic/basic.rb b/extensions/basic/basic.rb
@@ -0,0 +1,17 @@
+require "java"
+$CLASSPATH << File.join(File.dirname(__FILE__),  "jruby-ext", "target", "classes")
+
+require "com/purbon/basic"
+
+
+bar = Bar.new
+
+puts bar.say
+puts bar.shout
+
+class MyRubyClass
+  include Foo
+end
+
+puts MyRubyClass.new.build_string
+puts Foo.build_string
diff --git a/extensions/basic/jruby-ext/pom.xml b/extensions/basic/jruby-ext/pom.xml
@@ -0,0 +1,19 @@
+<?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>com.purbon</groupId>
+    <artifactId>jruby-ext</artifactId>
+    <version>1.0</version>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.jruby</groupId>
+            <artifactId>jruby</artifactId>
+            <version>1.7.21</version>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/extensions/basic/jruby-ext/src/main/java/com/purbon/Bar.java b/extensions/basic/jruby-ext/src/main/java/com/purbon/Bar.java
@@ -0,0 +1,29 @@
+package com.purbon;
+
+import org.jruby.Ruby;
+import org.jruby.RubyClass;
+import org.jruby.RubyObject;
+import org.jruby.RubyString;
+import org.jruby.anno.JRubyClass;
+import org.jruby.anno.JRubyMethod;
+import org.jruby.runtime.ThreadContext;
+import org.jruby.runtime.builtin.IRubyObject;
+
+/**
+ * A basic class created for learning purpouses
+ * Created by purbon on 24/08/15.
+ */
+
+@JRubyClass(name = "Bar")
+public class Bar extends RubyObject {
+
+    public Bar(Ruby ruby, RubyClass metaclass) {
+        super(ruby, metaclass);
+    }
+
+    @JRubyMethod(module = true, name = {"shout", "say"})
+    public static RubyString shout(ThreadContext context, IRubyObject self) {
+         return context.runtime.newString("Hello World!");
+    }
+
+}
diff --git a/extensions/basic/jruby-ext/src/main/java/com/purbon/BasicService.java b/extensions/basic/jruby-ext/src/main/java/com/purbon/BasicService.java
@@ -0,0 +1,33 @@
+package com.purbon;
+
+import org.jruby.Ruby;
+import org.jruby.RubyClass;
+import org.jruby.RubyModule;
+import org.jruby.runtime.ObjectAllocator;
+import org.jruby.runtime.builtin.IRubyObject;
+import org.jruby.runtime.load.BasicLibraryService;
+
+import java.io.IOException;
+
+/**
+ * This class is used when to run the instanciation and load
+ * of all the related modules and classes defined here.
+ * Created by purbon on 24/08/15.
+ */
+public class BasicService  implements BasicLibraryService {
+
+    public boolean basicLoad(final Ruby ruby) throws IOException {
+
+        RubyModule foo = ruby.defineModule("Foo");
+        foo.defineAnnotatedMethods(Foo.class);
+
+        RubyClass bar = ruby.defineClass("Bar", ruby.getObject(), new ObjectAllocator() {
+             public IRubyObject allocate(Ruby ruby, RubyClass rubyClass) {
+                return new Bar(ruby, rubyClass);
+            }
+        });
+        bar.defineAnnotatedMethods(Bar.class);
+
+        return true;
+    }
+}
diff --git a/extensions/basic/jruby-ext/src/main/java/com/purbon/Foo.java b/extensions/basic/jruby-ext/src/main/java/com/purbon/Foo.java
@@ -0,0 +1,25 @@
+package com.purbon;
+
+import org.jruby.*;
+import org.jruby.anno.JRubyMethod;
+import org.jruby.anno.JRubyModule;
+import org.jruby.runtime.ThreadContext;
+import org.jruby.runtime.builtin.IRubyObject;
+
+/**
+ * A basic module named Foo
+ * Created by purbon on 24/08/15.
+ */
+@JRubyModule( name = "Foo")
+public class Foo extends RubyObject {
+
+    public Foo(Ruby ruby, RubyClass metaclass) {
+        super(ruby, metaclass);
+    }
+
+    @JRubyMethod( module = true, name = { "build_string", "new_string" } )
+    public static RubyString buildAnString(ThreadContext context, IRubyObject self) {
+        Ruby runtime = context.runtime;
+        return runtime.newString("This is a new String");
+    }
+}
