container: plugins: root: update example plugin

`dfi` API headers must be managed on an as-needed basis.

container/plugins/root/example/example.cc

@@ -20,8 +20,6 @@
 //! \note File intended to be loaded into ROOT.cern framework / Cling interpreter
 //! \since docker-finance 1.0.0
 
-// NOTE: `dfi` API headers are included by default
-
 //! \namespace dfi::plugin
 //! \brief docker-finance plugins
 //! \warning All plugins (repo/custom) must exist within this namespace
@@ -47,30 +45,56 @@ namespace example
 //! \param arg String to pass to auto-loader (use-case is plugin-implementation defined)
 void load(const std::string& arg = {})
 {
+  namespace plugin = ::dfi::plugin;
+  namespace common = ::dfi::common;
+
   // Any code can follow here: run example functions, etc.
-  // For this example, get absolute path of this plugin's implementation and load.
+  //
-  ::dfi::plugin::common::PluginPath path("repo/example/internal/example.cc");
+  // For this example:
-  ::dfi::common::load(path.absolute());
+  //
+  //   1. Load needed requirements for this plugin's impl
+  //   2. Get absolute path of plugin's impl and then load
+  //
+  const std::string src{common::get_root_path() + "src/"};
+  common::load(src + "hash.hh");
+  common::load(src + "random.hh");
+  // ...add as needed
+
+  plugin::common::PluginPath path("repo/example/internal/example.cc");
+  common::load(path.absolute());
 
   // For this example, expect and pass a line of code to the interpreter after loading
   // NOTE: the following arg code can utilize any code that was loaded/interpreted in load()
   if (!arg.empty())
-    ::dfi::common::line(arg);
+    common::line(arg);
 }
 
 //! \brief Example auto-unloader
 //! \param arg String to pass to auto-unloader (use-case is plugin-implementation defined)
 void unload(const std::string& arg = {})
 {
+  namespace plugin = ::dfi::plugin;
+  namespace common = ::dfi::common;
+
   // For this example, expect and pass a line of code to the interpreter before unloading.
   // NOTE: the following arg code can utilize any code that was previously loaded/interpreted
   if (!arg.empty())
-    ::dfi::common::line(arg);
+    common::line(arg);
 
   // Any code can follow here: run example functions, etc.
-  // For this example, get absolute path of this plugin's implementation and unload.
+  //
-  ::dfi::plugin::common::PluginPath path("repo/example/internal/example.cc");
+  // For this example:
-  ::dfi::common::unload(path.absolute());
+  //
+  //   1. Unload needed requirements for this plugin's impl
+  //   2. Get absolute path of plugin's impl and then unload
+  //
+  const std::string src{common::get_root_path() + "src/"};
+  common::unload(src + "hash.hh");
+  common::unload(src + "random.hh");
+  // ...add as needed
+
+  plugin::common::PluginPath path("repo/example/internal/example.cc");
+  common::unload(path.absolute());
 }
 
 // NOTE: to auto-reload this plugin, load()/unload() here or utilize one of the `dfi::plugin::reload()` functions.

container/plugins/root/example/internal/example.cc

@@ -20,8 +20,6 @@
 //! \note File intended to be loaded into ROOT.cern framework / Cling interpreter
 //! \since docker-finance 1.1.0
 
-// NOTE: `dfi` API headers are included by default
-
 #include "./example.hh"
 
 #include <limits>

container/plugins/root/example/internal/example.hh

@@ -25,8 +25,6 @@
 
 #include <string>
 
-// NOTE: `dfi` API headers are included by default
-
 namespace dfi::plugin::example
 {
 //! \brief An example plugin implementation class