- Add a set_provider_factory() method to server_state to allow
injecting provider factory which will be called when the
provider is loaded.
Other related changes:
- Implement to_string() helper method for id class.
- Fix id ostream operator human readable id printing.
- Pass victim client_service as an argument to provider::bf_abort()
to allow passing victim context to custom provider.
- Implement prev() helper method for seqno class.
- Make server_state recover_streaming_appliers_if_not_recovered()
public. In some recovery scenarios the method must be called outside
of server_state internal code paths.
- Add storage_service requires_globals() method. The storage service
implementation may override this to return false if changing to
storage service context does not require store/reset globals.
- Change view final() to also require that the view status is not
primary for the view to be final. Also change the method name to
is_final() to avoid confusion with C++ final identifier.
- Fixes to server state handling in disconnecting and disconnected
states.
- Keep TOI meta data over whole TOI critical section.
Co-authored-by: Denis Protivensky <denis.protivensky@galeracluster.com>
Client state methods before_prepare() and before_commit() accept
a callback which is called by the provider after it can guarantee
sequential consistency. This allows application threads which wish to
maintain sequential consistency to enter before_prepare() and
before_commit() calls concurrently without waiting the prior call
to finish.
This commit defines a TLS service interface. If the implementation is
provided by the application when the provider is loaded, appropriate
hooks are probed from the provider and the provider side hooks are
initialized after the provider is loaded.
A sample implementation to demostrate the use of TLS interface
is provided in dbsim/db_tls.cpp.
Also contains a change to thread service interface: The
thread exit virtual method was changed to function pointer
to allow thread exit path which does not involve C++.
which complicates diagnostics and debugging.
Don't ignore provider return codes and more verbose error logging for
sst_sent(), sst_received(), set_encryption_key() methods
Refs codership/wsrep-lib#127
Added a wsrep::thread_service interface to allow application to
inject instrumented thread, mutex and condition variable implementation
for provider.
The interface is defined in include/wsrep/thread_service.hpp.
Sample implementation is provided in dbsim/db_threads.[h|c]pp.
This patch will also clean up some remaining dependencies to
wsrep-API compilation units so that the dependency to wsrep-API
is header only. This will extending the provider support to
later wsrep-API versions.
- 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
* Implemented encryption callback and enc_set_key
* Added pure virtual functions for encryption functionality
* Set enc key if provider was not loaded on time
* Added bootstrap service call to do DBMS side bootstrap operations
during the cluster bootstrap.
* Added last_committed_gtid() to provider interface
* Implemented wait_for_gtid() provider call
* Pass initial position to the server state
