Module classes are not forced to be called "Module"

Signed-off-by: bhavishyagopesh <bhavishyagopesh@gmail.com>

src/mgr/MgrPyModule.cc

@@ -172,31 +172,43 @@ int MgrPyModule::load()
 
   // Find the class
   // TODO: let them call it what they want instead of just 'Module'
-  auto pClass = PyObject_GetAttrString(pModule, (const char*)"Module");
+  auto tempClass = PyObject_GetAttrString(pModule, (const char*)"MgrModule");
   Py_DECREF(pModule);
-  if (pClass == nullptr) {
+
+  auto pClassList = tempClass->tp_subclasses;
+
+  if (pClassList == nullptr) {
     derr << "Class not found in module '" << module_name << "'" << dendl;
     derr << handle_pyerror() << dendl;
     return -EINVAL;
   }
 
-
-  // Just using the module name as the handle, replace with a
-  // uuidish thing if needed
-  auto pyHandle = PyString_FromString(module_name.c_str());
-  auto pArgs = PyTuple_Pack(1, pyHandle);
-  pClassInstance = PyObject_CallObject(pClass, pArgs);
-  Py_DECREF(pClass);
-  Py_DECREF(pyHandle);
-  Py_DECREF(pArgs);
-  if (pClassInstance == nullptr) {
-    derr << "Failed to construct class in '" << module_name << "'" << dendl;
-    derr << handle_pyerror() << dendl;
-    return -EINVAL;
-  } else {
-    dout(1) << "Constructed class from module: " << module_name << dendl;
+  int n = PyList_GET_SIZE(pClassList);
+
+  for (i = 0; i < n; i++){
+      PyTypeObject *pClass;
+      pClass = (PyTypeObject *)PyList_GET_ITEM(pClassList, i);
+
+      // Just using the module name as the handle, replace with a
+      // uuidish thing if needed
+      auto pyHandle = PyString_FromString(module_name.c_str());
+      auto pArgs = PyTuple_Pack(1, pyHandle);
+      pClassInstance = PyObject_CallObject(pClass, pArgs);
+      Py_DECREF(pClass);
+      Py_DECREF(pyHandle);
+      Py_DECREF(pArgs);
+      if (pClassInstance == nullptr) {
+        derr << "Failed to construct class in '" << module_name << "'" << dendl;
+        derr << handle_pyerror() << dendl;
+        return -EINVAL;
+      } else {
+        dout(1) << "Constructed class from module: " << module_name << dendl;
+      }
+
   }
 
+  Py_DECREF(pClassList);
+
   return load_commands();
 }