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codership/wsrep-lib#54 Service call to recover streaming appliers

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Introduced server_service recover_streaming_appliers() interface
call which will be called in total order whenever streaming appliers
must be recovered. The call comes with two overloads, one which
can be called from client context (e.g. after SST has been received)
and the other from high priority context (e.g. view event handling).

The client context overload should be eventually be deprecated once
there is a mechanism to make provider signal that it has joined to
the cluster and will start applying events.
This commit is contained in:
Teemu Ollakka
2019-01-18 14:02:58 +02:00
parent 144d8c13c1
commit a6b38d2428
7 changed files with 91 additions and 2 deletions
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8
include/wsrep/server_state.hpp
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@ -577,6 +577,7 @@ namespace wsrep
, pause_seqno_()
, streaming_clients_()
, streaming_appliers_()
, streaming_appliers_recovered_()
, provider_()
, name_(name)
, id_(wsrep::id::undefined())
@ -602,6 +603,12 @@ namespace wsrep
void wait_until_state(wsrep::unique_lock<wsrep::mutex>&, enum state) const;
// Interrupt all threads which are waiting for state
void interrupt_state_waiters(wsrep::unique_lock<wsrep::mutex>&);
// Recover streaming appliers if not already recoverd
template <class C>
void recover_streaming_appliers_if_not_recovered(
wsrep::unique_lock<wsrep::mutex>&, C&);
// Close SR transcations whose origin is outside of current
// cluster view.
void close_orphaned_sr_transactions(
@ -658,6 +665,7 @@ namespace wsrep
};
streaming_appliers_map streaming_appliers_;
bool streaming_appliers_recovered_;
wsrep::provider* provider_;
std::string name_;
wsrep::id id_;