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Recover current view from state after SST.

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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
This commit is contained in:
Alexey Yurchenko
2018-11-11 21:59:24 +02:00
parent c7e8bfbdb5
commit fb14883547
12 changed files with 198 additions and 27 deletions
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1
dbsim/db_client.hpp
View File

@ -59,6 +59,7 @@ namespace db
{ }
void start();
wsrep::client_state& client_state() { return client_state_; }
wsrep::client_service& client_service() { return client_service_; }
bool do_2pc() const { return false; }
private:
friend class db::server_state;

21
dbsim/db_server_service.cpp
View File

@ -26,6 +26,7 @@
db::server_service::server_service(db::server& server)
: server_(server)
, logged_view_()
{ }
wsrep::storage_service* db::server_service::storage_service(
@ -106,9 +107,25 @@ void db::server_service::log_dummy_write_set(
}
void db::server_service::log_view(wsrep::high_priority_service*,
const wsrep::view&)
const wsrep::view& v)
{
wsrep::log_info() << "View";
wsrep::log_info() << "View:\n" << v;
logged_view_ = v;
}
wsrep::view db::server_service::get_view(wsrep::client_service&,
const wsrep::id& own_id)
{
int const my_idx(logged_view_.member_index(own_id));
wsrep::view my_view(
logged_view_.state_id(),
logged_view_.view_seqno(),
logged_view_.status(),
logged_view_.capabilities(),
my_idx,
logged_view_.protocol_version(),
logged_view_.members()
);
return my_view;
}
void db::server_service::log_state_change(

3
dbsim/db_server_service.hpp
View File

@ -48,12 +48,15 @@ namespace db
override;
void log_view(wsrep::high_priority_service*,
const wsrep::view&) override;
wsrep::view get_view(wsrep::client_service&, const wsrep::id&)
override;
void log_state_change(enum wsrep::server_state::state,
enum wsrep::server_state::state) override;
int wait_committing_transactions(int) override;
void debug_sync(const char*) override;
private:
db::server& server_;
wsrep::view logged_view_;
};
}

7
dbsim/db_simulator.cpp
View File

@ -18,6 +18,7 @@
*/
#include "db_simulator.hpp"
#include "db_client.hpp"
#include "wsrep/logger.hpp"
@ -62,7 +63,11 @@ void db::simulator::sst(db::server& server,
<< server.server_state().name()
<< " -> " << request;
}
i->second->server_state().sst_received(gtid, 0);
db::client dummy(*(i->second), wsrep::client_id(-1),
wsrep::client_state::m_local, params());
i->second->server_state().sst_received(dummy.client_service(), gtid, 0);
server.server_state().sst_sent(gtid, 0);
}