diff --git a/handler_impl.hpp b/handler_impl.hpp
new file mode 100644
index 0000000..08452d7
--- /dev/null
+++ b/handler_impl.hpp
@@ -0,0 +1,62 @@
+#pragma once
+
+#include "handler.hpp"
+
+#include <cstdint>
+#include <map>
+#include <nlohmann/json.hpp>
+#include <string>
+#include <tuple>
+#include <vector>
+
+namespace google
+{
+namespace ipmi
+{
+
+extern const std::string defaultConfigFile;
+
+class Handler : public HandlerInterface
+{
+  public:
+    explicit Handler(const std::string& entityConfigPath = defaultConfigFile) :
+        _configFile(entityConfigPath){};
+    ~Handler() = default;
+
+    std::tuple<std::uint8_t, std::string> getEthDetails() const override;
+    std::int64_t getRxPackets(const std::string& name) const override;
+    VersionTuple getCpldVersion(unsigned int id) const override;
+    void psuResetDelay(std::uint32_t delay) const override;
+    std::string getEntityName(std::uint8_t id, std::uint8_t instance) override;
+    void buildI2cPcieMapping() override;
+    size_t getI2cPcieMappingSize() const override;
+    std::tuple<std::uint32_t, std::string>
+        getI2cEntry(unsigned int entry) const override;
+
+  private:
+    std::string _configFile;
+
+    bool _entityConfigParsed = false;
+
+    const std::map<uint8_t, std::string> _entityIdToName{
+        {0x03, "cpu"},
+        {0x04, "storage_device"},
+        {0x06, "system_management_module"},
+        {0x07, "system_board"},
+        {0x08, "memory_module"},
+        {0x0B, "add_in_card"},
+        {0x0E, "power_system_board"},
+        {0x10, "system_internal_expansion_board"},
+        {0x11, "other_system_board"},
+        {0x17, "system_chassis"},
+        {0x1D, "fan"},
+        {0x1E, "cooling_unit"},
+        {0x20, "memory_device"}};
+
+    nlohmann::json _entityConfig{};
+
+    std::vector<std::tuple<uint32_t, std::string>> _pcie_i2c_map;
+};
+
+} // namespace ipmi
+} // namespace google