dump 2

launcher/CMakeLists.txt

@@ -28,5 +28,6 @@ if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
     add_link_options(-O3)
 endif ()
 
+add_subdirectory(libjvm_wrapper)
+add_subdirectory(backend)
 add_subdirectory(gui)
-add_subdirectory(backend)

launcher/backend/CMakeLists.txt

@@ -5,3 +5,5 @@ add_library(backend
 
 target_include_directories(backend PRIVATE include)
 target_include_directories(backend PUBLIC include_public)
+
+target_link_libraries(backend PUBLIC libjvm_wrapper)

launcher/backend/include_public/DhfsInstance.hpp

@@ -5,12 +5,31 @@
 #ifndef DHFSINSTANCE_HPP
 #define DHFSINSTANCE_HPP
 
+#include <jni.h>
 
+enum class DhfsInstanceState {
+    RUNNING,
+    STOPPED,
+};
 
 class DhfsInstance {
+public:
+    DhfsInstance();
 
+    ~DhfsInstance();
+
+    DhfsInstanceState state();
+
+    void start();
+
+    void stop();
+
+private:
+    DhfsInstanceState _state = DhfsInstanceState::STOPPED;
+
+    JavaVM* _jvm = nullptr;
+    JNIEnv *_env = nullptr;
 };
 
 
-
 #endif //DHFSINSTANCE_HPP

launcher/backend/src/DhfsInstance.cpp

@@ -3,3 +3,48 @@
 //
 
 #include "DhfsInstance.hpp"
+
+#include <stdexcept>
+#include <vector>
+
+#include "LibjvmWrapper.hpp"
+
+DhfsInstance::DhfsInstance() {
+}
+
+DhfsInstance::~DhfsInstance() {
+}
+
+DhfsInstanceState DhfsInstance::state() {
+}
+
+void DhfsInstance::start() {
+    switch (_state) {
+        case DhfsInstanceState::RUNNING:
+            return;
+        case DhfsInstanceState::STOPPED:
+            break;
+        default:
+            throw std::runtime_error("Unknown DhfsInstanceState");
+    }
+
+    JavaVMInitArgs args;
+    std::vector<JavaVMOption> options;
+    args.version = JNI_VERSION_21;
+    args.nOptions = 0;
+    args.options = options.data();
+    args.ignoreUnrecognized = false;
+
+    LibjvmWrapper::instance().JNI_CreateJavaVM(&_jvm, (void**) &_env, &args);
+}
+
+void DhfsInstance::stop() {
+    switch (_state) {
+        case DhfsInstanceState::RUNNING:
+            break;
+        case DhfsInstanceState::STOPPED:
+            return;
+        default:
+            throw std::runtime_error("Unknown DhfsInstanceState");
+    }
+}

launcher/gui/CMakeLists.txt

@@ -11,3 +11,4 @@ add_executable(launcher
 )
 
 target_link_libraries(launcher ${wxWidgets_LIBRARIES})
+target_link_libraries(launcher backend)

launcher/gui/src/LauncherAppMainFrame.cpp

@@ -8,5 +8,6 @@ LauncherAppMainFrame::LauncherAppMainFrame(wxWindow* parent)
 
 void LauncherAppMainFrame::OnStartStopButtonClick(wxCommandEvent& event) {
     std::cout << "Hi!" << std::endl;
+    _dhfsInstance.start();
     // TODO: Implement OnStartStopButtonClick
 }

launcher/gui/src/LauncherAppMainFrame.h

@@ -10,6 +10,8 @@ Subclass of MainFrame, which is generated by wxFormBuilder.
 
 //// end generated include
 
+#include "DhfsInstance.hpp"
+
 /** Implementing MainFrame */
 class LauncherAppMainFrame : public MainFrame {
 protected:
@@ -21,6 +23,9 @@ public:
     LauncherAppMainFrame(wxWindow* parent);
 
     //// end generated class members
+
+private:
+    DhfsInstance _dhfsInstance;
 };
 
 #endif // __LauncherAppMainFrame__

launcher/libjvm_wrapper/CMakeLists.txt

@@ -0,0 +1,10 @@
+add_library(libjvm_wrapper
+        src/LibjvmWrapper.cpp
+        include_public/LibjvmWrapper.hpp
+)
+
+target_include_directories(libjvm_wrapper PRIVATE include)
+target_include_directories(libjvm_wrapper PUBLIC include_public)
+
+find_package(JNI REQUIRED)
+target_include_directories(libjvm_wrapper PUBLIC ${JNI_INCLUDE_DIRS})

launcher/libjvm_wrapper/include_public/LibjvmWrapper.hpp

@@ -0,0 +1,25 @@
+//
+// Created by Stepan Usatiuk on 24.06.2025.
+//
+
+#ifndef LIBJVMWRAPPER_HPP
+#define LIBJVMWRAPPER_HPP
+#include <jni.h>
+
+
+class LibjvmWrapper {
+public:
+    static LibjvmWrapper& instance();
+
+    decltype(JNI_CreateJavaVM)* JNI_CreateJavaVM;
+
+private:
+    LibjvmWrapper();
+
+    ~LibjvmWrapper();
+
+    void* _lib_handle;
+};
+
+
+#endif //LIBJVMWRAPPER_HPP

launcher/libjvm_wrapper/src/LibjvmWrapper.cpp

@@ -0,0 +1,25 @@
+//
+// Created by Stepan Usatiuk on 24.06.2025.
+//
+
+#include "LibjvmWrapper.hpp"
+#include <dlfcn.h>
+#include <jni.h>
+
+static constexpr auto LIBJVM_PATH =
+        "/Library/Java/JavaVirtualMachines/zulu-21.jdk/Contents/Home/lib/server/libjvm.dylib";
+
+LibjvmWrapper& LibjvmWrapper::instance() {
+    static LibjvmWrapper instance;
+    return instance;
+}
+
+LibjvmWrapper::LibjvmWrapper() {
+    _lib_handle = dlopen(LIBJVM_PATH, RTLD_NOW | RTLD_GLOBAL);
+    JNI_CreateJavaVM = reinterpret_cast<decltype(JNI_CreateJavaVM)>(
+        dlsym(_lib_handle, "JNI_CreateJavaVM"));
+}
+
+LibjvmWrapper::~LibjvmWrapper() {
+    dlclose(_lib_handle);
+}