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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "Types.h"
#include "include/ceph_assert.h"
#include "include/stringify.h"
#include "common/Formatter.h"
namespace rbd {
namespace mirror {
namespace leader_watcher {
namespace {
class EncodePayloadVisitor : public boost::static_visitor<void> {
public:
explicit EncodePayloadVisitor(bufferlist &bl) : m_bl(bl) {}
template <typename Payload>
inline void operator()(const Payload &payload) const {
using ceph::encode;
encode(static_cast<uint32_t>(Payload::NOTIFY_OP), m_bl);
payload.encode(m_bl);
}
private:
bufferlist &m_bl;
};
class DecodePayloadVisitor : public boost::static_visitor<void> {
public:
DecodePayloadVisitor(__u8 version, bufferlist::const_iterator &iter)
: m_version(version), m_iter(iter) {}
template <typename Payload>
inline void operator()(Payload &payload) const {
payload.decode(m_version, m_iter);
}
private:
__u8 m_version;
bufferlist::const_iterator &m_iter;
};
class DumpPayloadVisitor : public boost::static_visitor<void> {
public:
explicit DumpPayloadVisitor(Formatter *formatter) : m_formatter(formatter) {}
template <typename Payload>
inline void operator()(const Payload &payload) const {
NotifyOp notify_op = Payload::NOTIFY_OP;
m_formatter->dump_string("notify_op", stringify(notify_op));
payload.dump(m_formatter);
}
private:
ceph::Formatter *m_formatter;
};
} // anonymous namespace
void HeartbeatPayload::encode(bufferlist &bl) const {
}
void HeartbeatPayload::decode(__u8 version, bufferlist::const_iterator &iter) {
}
void HeartbeatPayload::dump(Formatter *f) const {
}
void LockAcquiredPayload::encode(bufferlist &bl) const {
}
void LockAcquiredPayload::decode(__u8 version, bufferlist::const_iterator &iter) {
}
void LockAcquiredPayload::dump(Formatter *f) const {
}
void LockReleasedPayload::encode(bufferlist &bl) const {
}
void LockReleasedPayload::decode(__u8 version, bufferlist::const_iterator &iter) {
}
void LockReleasedPayload::dump(Formatter *f) const {
}
void UnknownPayload::encode(bufferlist &bl) const {
ceph_abort();
}
void UnknownPayload::decode(__u8 version, bufferlist::const_iterator &iter) {
}
void UnknownPayload::dump(Formatter *f) const {
}
void NotifyMessage::encode(bufferlist& bl) const {
ENCODE_START(1, 1, bl);
boost::apply_visitor(EncodePayloadVisitor(bl), payload);
ENCODE_FINISH(bl);
}
void NotifyMessage::decode(bufferlist::const_iterator& iter) {
DECODE_START(1, iter);
uint32_t notify_op;
decode(notify_op, iter);
// select the correct payload variant based upon the encoded op
switch (notify_op) {
case NOTIFY_OP_HEARTBEAT:
payload = HeartbeatPayload();
break;
case NOTIFY_OP_LOCK_ACQUIRED:
payload = LockAcquiredPayload();
break;
case NOTIFY_OP_LOCK_RELEASED:
payload = LockReleasedPayload();
break;
default:
payload = UnknownPayload();
break;
}
apply_visitor(DecodePayloadVisitor(struct_v, iter), payload);
DECODE_FINISH(iter);
}
void NotifyMessage::dump(Formatter *f) const {
apply_visitor(DumpPayloadVisitor(f), payload);
}
void NotifyMessage::generate_test_instances(std::list<NotifyMessage *> &o) {
o.push_back(new NotifyMessage(HeartbeatPayload()));
o.push_back(new NotifyMessage(LockAcquiredPayload()));
o.push_back(new NotifyMessage(LockReleasedPayload()));
}
std::ostream &operator<<(std::ostream &out, const NotifyOp &op) {
switch (op) {
case NOTIFY_OP_HEARTBEAT:
out << "Heartbeat";
break;
case NOTIFY_OP_LOCK_ACQUIRED:
out << "LockAcquired";
break;
case NOTIFY_OP_LOCK_RELEASED:
out << "LockReleased";
break;
default:
out << "Unknown (" << static_cast<uint32_t>(op) << ")";
break;
}
return out;
}
} // namespace leader_watcher
} // namespace mirror
} // namespace librbd
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