Add example task to hello world app

dxa-helloworld/src/main/java/de/hhu/bsinfo/dxapp/HelloTask.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2018 Heinrich-Heine-Universitaet Duesseldorf, Institute of Computer Science,
+ * Department Operating Systems
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package de.hhu.bsinfo.dxapp;
+
+import de.hhu.bsinfo.dxram.ms.Signal;
+import de.hhu.bsinfo.dxram.ms.Task;
+import de.hhu.bsinfo.dxram.ms.TaskContext;
+import de.hhu.bsinfo.dxutils.serialization.Exporter;
+import de.hhu.bsinfo.dxutils.serialization.Importer;
+
+/**
+ * Example for a task script to run with the MasterSlaveService of DXRAM.
+ *
+ * @author Stefan Nothaas, [email protected], 18.02.2019
+ */
+public class HelloTask implements Task {
+    /**
+     * Constructor.
+     */
+    public HelloTask() {
+
+    }
+
+    @Override
+    public int execute(final TaskContext p_ctx) {
+        System.out.println("Hello from task running on slave " + p_ctx.getCtxData().getSlaveId());
+        return 0;
+    }
+
+    @Override
+    public void handleSignal(final Signal p_signal) {
+        // ignore signals
+    }
+
+    @Override
+    public void exportObject(final Exporter p_exporter) {
+        // nothing to export
+    }
+
+    @Override
+    public void importObject(final Importer p_importer) {
+        // nothing to import
+    }
+
+    @Override
+    public int sizeofObject() {
+        return 0;
+    }
+}