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wsrep-lib/src/view.cpp
Alexey Yurchenko fb14883547 Recover current view from state after SST.
When member joins the group and needs to receive an SST it won't
receive the corresponding menbership view event because the SST
happens after the event and will already include the effects of
all events ordered before it. The view then must be recovered from
the received state.

Minor renames and cleanups.

References codership/wsrep-lib#18
2018-11-12 12:47:42 +02:00

71 lines
2.2 KiB
C++

/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
* Wsrep-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* Wsrep-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#include "wsrep/view.hpp"
#include "wsrep/provider.hpp"
int wsrep::view::member_index(const wsrep::id& member_id) const
{
// first, quick guess
if (own_index_ >= 0 && members_[own_index_].id() == member_id)
{
return own_index_;
}
// guesing didn't work, scan the list
for (unsigned int i(0); i < members_.size(); ++i)
{
if (i != own_index_ && members_[i].id() == member_id) return i;
}
return -1;
}
static const char* view_status_str(enum wsrep::view::status s)
{
switch(s)
{
case wsrep::view::primary: return "PRIMARY";
case wsrep::view::non_primary: return "NON-PRIMARY";
case wsrep::view::disconnected: return "DISCONNECTED";
}
assert(0);
return "invalid status";
}
void wsrep::view::print(std::ostream& os) const
{
os << " id: " << state_id() << "\n"
<< " status: " << view_status_str(status()) << "\n"
<< " prococol_version: " << protocol_version() << "\n"
<< " capabilities: " << provider::capability::str(capabilities())<<"\n"
<< " final: " << (final() ? "yes" : "no") << "\n"
<< " own_index: " << own_index() << "\n"
<< " members(" << members().size() << "):\n";
for (std::vector<wsrep::view::member>::const_iterator i(members().begin());
i != members().end(); ++i)
{
os << "\t" << (i - members().begin()) /* ordinal index */
<< ": " << i->id()
<< ", " << i->name() << "\n";
}
}