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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef RBD_MIRROR_LEADER_WATCHER_TYPES_H
#define RBD_MIRROR_LEADER_WATCHER_TYPES_H
#include "include/int_types.h"
#include "include/buffer_fwd.h"
#include "include/encoding.h"
#include <string>
#include <vector>
#include <boost/variant.hpp>
struct Context;
namespace ceph { class Formatter; }
namespace rbd {
namespace mirror {
namespace leader_watcher {
struct Listener {
typedef std::vector<std::string> InstanceIds;
virtual ~Listener() {
}
virtual void post_acquire_handler(Context *on_finish) = 0;
virtual void pre_release_handler(Context *on_finish) = 0;
virtual void update_leader_handler(
const std::string &leader_instance_id) = 0;
virtual void handle_instances_added(const InstanceIds& instance_ids) = 0;
virtual void handle_instances_removed(const InstanceIds& instance_ids) = 0;
};
enum NotifyOp {
NOTIFY_OP_HEARTBEAT = 0,
NOTIFY_OP_LOCK_ACQUIRED = 1,
NOTIFY_OP_LOCK_RELEASED = 2,
};
struct HeartbeatPayload {
static const NotifyOp NOTIFY_OP = NOTIFY_OP_HEARTBEAT;
HeartbeatPayload() {
}
void encode(bufferlist &bl) const;
void decode(__u8 version, bufferlist::const_iterator &iter);
void dump(Formatter *f) const;
};
struct LockAcquiredPayload {
static const NotifyOp NOTIFY_OP = NOTIFY_OP_LOCK_ACQUIRED;
LockAcquiredPayload() {
}
void encode(bufferlist &bl) const;
void decode(__u8 version, bufferlist::const_iterator &iter);
void dump(Formatter *f) const;
};
struct LockReleasedPayload {
static const NotifyOp NOTIFY_OP = NOTIFY_OP_LOCK_RELEASED;
LockReleasedPayload() {
}
void encode(bufferlist &bl) const;
void decode(__u8 version, bufferlist::const_iterator &iter);
void dump(Formatter *f) const;
};
struct UnknownPayload {
static const NotifyOp NOTIFY_OP = static_cast<NotifyOp>(-1);
UnknownPayload() {
}
void encode(bufferlist &bl) const;
void decode(__u8 version, bufferlist::const_iterator &iter);
void dump(Formatter *f) const;
};
typedef boost::variant<HeartbeatPayload,
LockAcquiredPayload,
LockReleasedPayload,
UnknownPayload> Payload;
struct NotifyMessage {
NotifyMessage(const Payload &payload = UnknownPayload()) : payload(payload) {
}
Payload payload;
void encode(bufferlist& bl) const;
void decode(bufferlist::const_iterator& it);
void dump(Formatter *f) const;
static void generate_test_instances(std::list<NotifyMessage *> &o);
};
WRITE_CLASS_ENCODER(NotifyMessage);
std::ostream &operator<<(std::ostream &out, const NotifyOp &op);
} // namespace leader_watcher
} // namespace mirror
} // namespace librbd
using rbd::mirror::leader_watcher::encode;
using rbd::mirror::leader_watcher::decode;
#endif // RBD_MIRROR_LEADER_WATCHER_TYPES_H
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