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codership/wsrep-lib#104 Error voting support

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- populate and pass real error description buffer to provider in case
   of applying error
 - return 0 from server_state::on_apply() if error voting confirmed
   consistency
 - remove fragments and rollback after fragment applying failure
 - always release streaming applier on commit or rollback
This commit is contained in:
Alexey Yurchenko
2019-04-30 19:00:48 +03:00
parent fd66bdef0b
commit 0f676bd893
22 changed files with 470 additions and 187 deletions
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34
dbsim/db_high_priority_service.cpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -47,7 +47,8 @@ int db::high_priority_service::adopt_transaction(const wsrep::transaction&)
int db::high_priority_service::apply_write_set(
const wsrep::ws_meta&,
const wsrep::const_buffer&)
const wsrep::const_buffer&,
wsrep::mutable_buffer&)
{
client_.se_trx_.start(&client_);
client_.se_trx_.apply(client_.client_state().transaction());
@ -56,7 +57,8 @@ int db::high_priority_service::apply_write_set(
int db::high_priority_service::apply_toi(
const wsrep::ws_meta&,
const wsrep::const_buffer&)
const wsrep::const_buffer&,
wsrep::mutable_buffer&)
{
throw wsrep::not_implemented_error();
}
@ -84,6 +86,11 @@ int db::high_priority_service::rollback(const wsrep::ws_handle& ws_handle,
return ret;
}
void db::high_priority_service::adopt_apply_error(wsrep::mutable_buffer& err)
{
client_.client_state_.adopt_apply_error(err);
}
void db::high_priority_service::after_apply()
{
client_.client_state_.after_applying();
@ -91,17 +98,22 @@ void db::high_priority_service::after_apply()
int db::high_priority_service::log_dummy_write_set(
const wsrep::ws_handle& ws_handle,
const wsrep::ws_meta& ws_meta)
const wsrep::ws_meta& ws_meta,
wsrep::mutable_buffer& err)
{
int ret(client_.client_state_.start_transaction(ws_handle, ws_meta));
assert(ret == 0);
client_.client_state_.prepare_for_ordering(ws_handle, ws_meta, true);
ret = client_.client_state_.before_commit();
assert(ret == 0);
ret = client_.client_state_.ordered_commit();
assert(ret == ret);
ret = client_.client_state_.after_commit();
assert(ret == 0);
if (ws_meta.ordered())
{
client_.client_state_.adopt_apply_error(err);
client_.client_state_.prepare_for_ordering(ws_handle, ws_meta, true);
ret = client_.client_state_.before_commit();
assert(ret == 0);
ret = client_.client_state_.ordered_commit();
assert(ret == 0);
ret = client_.client_state_.after_commit();
assert(ret == 0);
}
client_.client_state_.after_applying();
return ret;
}

14
dbsim/db_high_priority_service.hpp
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
* Copyright (C) 2018-2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -35,7 +35,8 @@ namespace db
const wsrep::transaction& transaction() const override;
int adopt_transaction(const wsrep::transaction&) override;
int apply_write_set(const wsrep::ws_meta&,
const wsrep::const_buffer&) override;
const wsrep::const_buffer&,
wsrep::mutable_buffer&) override;
int append_fragment_and_commit(
const wsrep::ws_handle&,
const wsrep::ws_meta&, const wsrep::const_buffer&)
@ -45,14 +46,17 @@ namespace db
{ return 0; }
int commit(const wsrep::ws_handle&, const wsrep::ws_meta&) override;
int rollback(const wsrep::ws_handle&, const wsrep::ws_meta&) override;
int apply_toi(const wsrep::ws_meta&, const wsrep::const_buffer&) override;
int apply_toi(const wsrep::ws_meta&, const wsrep::const_buffer&,
wsrep::mutable_buffer&) override;
void adopt_apply_error(wsrep::mutable_buffer&) override;
virtual void after_apply() override;
void store_globals() override { }
void reset_globals() override { }
void switch_execution_context(wsrep::high_priority_service&) override
{ }
int log_dummy_write_set(const wsrep::ws_handle&,
const wsrep::ws_meta&) override;
const wsrep::ws_meta&,
wsrep::mutable_buffer&) override;
virtual bool is_replaying() const override;
void debug_crash(const char*) override { }
private:
@ -71,7 +75,7 @@ namespace db
// After apply is empty for replayer to keep the transaction
// context available for the client session after replaying
// is over.
void after_apply() override { }
void after_apply() override {}
bool is_replaying() const override { return true; }
};