connection between 2 systems and bug fixes (#14)

tests/component_tests/app_connect/test_component_system_service.cpp

@@ -0,0 +1,69 @@
+/********************************************************************************
+ * Copyright (c) 2025-2026 ZF Friedrichshafen AG
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Contributors:
+ *   Erik Verhoeven - initial API and implementation
+ ********************************************************************************/
+
+#include <mutex>
+#include <iostream>
+#include <functional>
+#include <thread>
+#include <support/component_impl.h>
+#include <support/local_service_access.h>
+#include "generated/test_component.h"
+
+inline sdv::process::TProcessID GetProcessID()
+{
+    static sdv::process::TProcessID tProcessID = 0;
+    if (!tProcessID)
+    {
+        sdv::process::IProcessInfo* pProcessInfo = sdv::core::GetObject<sdv::process::IProcessInfo>("ProcessControlService");
+        if (!pProcessInfo) return 0;
+        tProcessID = pProcessInfo->GetProcessID();
+    }
+    return tProcessID;
+}
+
+/**
+ * @brief Hello utlity
+ */
+class CSystemHelloService : public sdv::CSdvObject, public IHello
+{
+public:
+
+    BEGIN_SDV_INTERFACE_MAP()
+        SDV_INTERFACE_ENTRY(IHello)
+    END_SDV_INTERFACE_MAP()
+
+    DECLARE_OBJECT_CLASS_TYPE(sdv::EObjectType::system_object)
+    DECLARE_OBJECT_CLASS_NAME("TestObject_SystemHelloService")
+
+    /**
+     * @brief Say hello. Overload of IHello::SayHello.
+     * @param[in, out] sStages The struct stages will be filled by the components. The complex service calls the basic service. The
+     * basic service calls the device. The device calls the system service and the utility.
+     * @return The greetings string.
+     */
+    virtual sdv::u8string SayHello(/*inout*/ SStages& sStages) const override
+    {
+        sStages.bSystemService = true;
+
+        return "PID#" + std::to_string(GetPID()) + " Hello from system service\n";
+    }
+
+    /**
+     * @brief Get the PID of the process the component is running in... Overload of IHello::GetPID.
+     */
+    sdv::process::TProcessID GetPID() const
+    {
+        return GetProcessID();
+    }
+};
+DEFINE_SDV_OBJECT(CSystemHelloService)