From 9edd9ebaebcca955abc28c5dd9cbc1acf5dd747d Mon Sep 17 00:00:00 2001
From: 0qln <0qln@proton.me>
Date: Fri, 17 Apr 2026 10:39:40 +0200
Subject: [PATCH] praktikum1/aufgabe2

---
 .../demo/praktikum1/aufgabe2/Client.java      | 26 ++++++++++++++
 .../aufgabe2/StatefulCalculator.java          | 35 +++++++++++++++++++
 .../aufgabe2/StatefulCalculatorRemote.java    | 15 ++++++++
 3 files changed, 76 insertions(+)
 create mode 100644 client/src/main/java/org/example/demo/praktikum1/aufgabe2/Client.java
 create mode 100644 server/src/main/java/org/example/demo/praktikum1/aufgabe2/StatefulCalculator.java
 create mode 100644 server/src/main/java/org/example/demo/praktikum1/aufgabe2/StatefulCalculatorRemote.java

diff --git a/client/src/main/java/org/example/demo/praktikum1/aufgabe2/Client.java b/client/src/main/java/org/example/demo/praktikum1/aufgabe2/Client.java
new file mode 100644
index 0000000..0bdfd49
--- /dev/null
+++ b/client/src/main/java/org/example/demo/praktikum1/aufgabe2/Client.java
@@ -0,0 +1,26 @@
+package org.example.demo.praktikum1.aufgabe2;
+import javax.naming.InitialContext;
+import javax.naming.Context;
+import java.util.Properties;
+
+public class Client {
+    public static void main(String[] args) throws Exception {
+        Properties props = new Properties();
+        props.setProperty(Context.INITIAL_CONTEXT_FACTORY,
+                          "org.wildfly.naming.client.WildFlyInitialContextFactory");
+        props.setProperty(Context.PROVIDER_URL, "http-remoting://localhost:8080");
+
+        InitialContext ctx = new InitialContext(props);
+        String jndiName = "ejb:/ejb-server-1.0-SNAPSHOT/StatefulCalculator!org.example.demo.praktikum1.aufgabe2.StatefulCalculatorRemote";
+        var calc = (StatefulCalculatorRemote) ctx.lookup(jndiName);
+
+        System.out.println("6 + 7     = " + calc.addiere(6, 7));
+        System.out.println("6 + 7 + 8 = " + calc.addiere(8));
+        System.out.println("6 - 7     = " + calc.subtrahiere(6, 7));
+        System.out.println("6 - 7 - 8 = " + calc.subtrahiere(8));
+        System.out.println("6 * 7     = " + calc.multipliziere(6, 7));
+        System.out.println("6 * 7 * 8 = " + calc.multipliziere(8));
+        System.out.println("6 / 7     = " + calc.dividiere(6, 7));
+        System.out.println("6 / 7 / 8 = " + calc.dividiere(8));
+    }
+}
diff --git a/server/src/main/java/org/example/demo/praktikum1/aufgabe2/StatefulCalculator.java b/server/src/main/java/org/example/demo/praktikum1/aufgabe2/StatefulCalculator.java
new file mode 100644
index 0000000..f4b6994
--- /dev/null
+++ b/server/src/main/java/org/example/demo/praktikum1/aufgabe2/StatefulCalculator.java
@@ -0,0 +1,35 @@
+package org.example.demo.praktikum1.aufgabe2;
+import org.example.demo.praktikum1.aufgabe1.Calculator;
+
+import jakarta.ejb.Stateful;
+
+@Stateful
+public class StatefulCalculator implements StatefulCalculatorRemote {
+    private double state;
+
+    public double addiere(float zahl1, float zahl2) {
+        return state = new Calculator().addiere(zahl1, zahl2);
+    }
+    public double subtrahiere(float zahl1, float zahl2) {
+        return state = new Calculator().subtrahiere(zahl1, zahl2);
+    }
+    public double multipliziere(float zahl1, float zahl2) {
+        return state = new Calculator().multipliziere(zahl1, zahl2);
+    }
+    public double dividiere(float zahl1, float zahl2) {
+        return state = new Calculator().dividiere(zahl1, zahl2);
+    }
+
+    public double addiere(float zahl) {
+        return state = new Calculator().addiere((float)state, zahl);
+    }
+    public double subtrahiere(float zahl) {
+        return state = new Calculator().subtrahiere((float)state, zahl);
+    }
+    public double multipliziere(float zahl) {
+        return state = new Calculator().multipliziere((float)state, zahl);
+    }
+    public double dividiere(float zahl) {
+        return state = new Calculator().dividiere((float)state, zahl);
+    }
+}
diff --git a/server/src/main/java/org/example/demo/praktikum1/aufgabe2/StatefulCalculatorRemote.java b/server/src/main/java/org/example/demo/praktikum1/aufgabe2/StatefulCalculatorRemote.java
new file mode 100644
index 0000000..50448c9
--- /dev/null
+++ b/server/src/main/java/org/example/demo/praktikum1/aufgabe2/StatefulCalculatorRemote.java
@@ -0,0 +1,15 @@
+package org.example.demo.praktikum1.aufgabe2;
+import jakarta.ejb.Remote;
+
+@Remote
+public interface StatefulCalculatorRemote {
+    double addiere(float zahl1, float zahl2);
+    double subtrahiere(float zahl1, float zahl2);
+    double multipliziere(float zahl1, float zahl2);
+    double dividiere(float zahl1, float zahl2);
+
+    double addiere(float zahl);
+    double subtrahiere(float zahl);
+    double multipliziere(float zahl);
+    double dividiere(float zahl);
+}