ceph/src/rgw/rgw_period_pusher.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #ifndef RGW_PERIOD_PUSHER_H
   5 #define RGW_PERIOD_PUSHER_H
   6
   7 #include <memory>
   8 #include <mutex>
   9 #include <vector>
  10
  11 #include "rgw_realm_reloader.h"
  12
  13 class RGWRados;
  14 class RGWPeriod;
  15
  16 // RGWRealmNotify payload for push coordination
  17 using RGWZonesNeedPeriod = RGWPeriod;
  18
  19 /**
  20  * RGWPeriodPusher coordinates with other nodes via the realm watcher to manage
  21  * the responsibility for pushing period updates to other zones or zonegroups.
  22  */
  23 class RGWPeriodPusher final : public RGWRealmWatcher::Watcher,
  24                               public RGWRealmReloader::Pauser {
  25  public:
  26   RGWPeriodPusher(RGWRados* store);
  27   ~RGWPeriodPusher() override;
  28
  29   /// respond to realm notifications by pushing new periods to other zones
  30   void handle_notify(RGWRealmNotify type, bufferlist::iterator& p) override;
  31
  32   /// avoid accessing RGWRados while dynamic reconfiguration is in progress.
  33   /// notifications will be enqueued until resume()
  34   void pause() override;
  35
  36   /// continue processing notifications with a new RGWRados instance
  37   void resume(RGWRados* store) override;
  38
  39  private:
  40   void handle_notify(RGWZonesNeedPeriod&& period);
  41
  42   CephContext *const cct;
  43   RGWRados* store;
  44
  45   std::mutex mutex;
  46   epoch_t realm_epoch{0}; //< the current realm epoch being sent
  47   epoch_t period_epoch{0}; //< the current period epoch being sent
  48
  49   /// while paused for reconfiguration, we need to queue up notifications
  50   std::vector<RGWZonesNeedPeriod> pending_periods;
  51
  52   class CRThread; //< contains thread, coroutine manager, http manager
  53   std::unique_ptr<CRThread> cr_thread; //< thread to run the push coroutines
  54 };
  55
  56 #endif // RGW_PERIOD_PUSHER_H