1 files changed, 89 insertions, 0 deletions
diff --git a/src/mgr/PyModuleRunner.h b/src/mgr/PyModuleRunner.h
new file mode 100644
index 000000000..88d9f755a
--- /dev/null
+++ b/src/mgr/PyModuleRunner.h
@@ -0,0 +1,89 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2016 John Spray <john.spray@redhat.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ */
+
+
+#pragma once
+
+#include "common/Thread.h"
+#include "common/LogClient.h"
+#include "mgr/Gil.h"
+
+#include "PyModule.h"
+
+/**
+ * Implement the pattern of calling serve() on a module in a thread,
+ * until shutdown() is called.
+ */
+class PyModuleRunner
+{
+public:
+  // Info about the module we're going to run
+  PyModuleRef py_module;
+
+protected:
+  // Populated by descendent class
+  PyObject *pClassInstance = nullptr;
+
+  LogChannelRef clog;
+
+  class PyModuleRunnerThread : public Thread
+  {
+    PyModuleRunner *mod;
+
+  public:
+    explicit PyModuleRunnerThread(PyModuleRunner *mod_)
+      : mod(mod_) {}
+
+    void *entry() override;
+  };
+
+  bool is_dead() const { return dead; }
+
+  std::string thread_name;
+
+public:
+  int serve();
+  void shutdown();
+  void log(const std::string &record);
+
+  const char *get_thread_name() const
+  {
+    return thread_name.c_str();
+  }
+
+  PyModuleRunner(
+      const PyModuleRef &py_module_,
+      LogChannelRef clog_)
+    : 
+      py_module(py_module_),
+      clog(clog_),
+      thread(this)
+  {
+    // Shortened name for use as thread name, because thread names
+    // required to be <16 chars
+    thread_name = py_module->get_name().substr(0, 15);
+
+    ceph_assert(py_module != nullptr);
+  }
+
+  ~PyModuleRunner();
+
+  PyModuleRunnerThread thread;
+
+  std::string const &get_name() const { return py_module->get_name(); }
+
+private:
+  bool dead = false;
+};
+
+