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Implementation of client_state NBO operations.

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- Implemented calls to enter and leave NBO phase one and two
- Extended client_state mode checking to include m_nbo
- Changed client_state state and mode change sanity checks to
  print a warning and assert() instead of throwing exceptions
  to be more graceful in release builds.
This commit is contained in:
Teemu Ollakka
2019-05-06 18:39:55 +03:00
parent 53d71b29ea
commit 946eb4121d
5 changed files with 183 additions and 30 deletions
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36
include/wsrep/client_state.hpp
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@ -104,7 +104,7 @@ namespace wsrep
m_nbo
};
static const int n_modes_ = m_rsu + 1;
static const int n_modes_ = m_nbo + 1;
/**
* Client state enumeration.
*
@ -638,16 +638,44 @@ namespace wsrep
/**
* Begin non-blocking operation.
*
* The NBO operation is started by grabbing TOI critical
* section. The keys and buffer are certifed as in TOI
* operation. If the call fails due to error returned by
* the provider, the provider error code can be retrieved
* by current_error_status() call.
*
* @param keys Array of keys for NBO operation.
* @param buffer NBO write set
*
* @return Zero in case of success, non-zero in case of failure.
*/
int begin_nbo_phase_one(const wsrep::key_array&);
int begin_nbo_phase_one(const wsrep::key_array& keys,
const wsrep::const_buffer& buffer);
/**
* End non-blocking operation
* End non-blocking operation phase after aquiring required
* resources for operation.
*/
int end_nbo_phase_one();
int begin_nbo_phase_two();
/**
* Begin non-blocking operation phase two. The keys argument
* passed to this call must contain the same keys which were
* passed to begin_nbo_phase_one().
*
* @todo Keys should be stored internally in client_state
* so that they would not be required as an argument
* here.
*
* @param keys Array of keys for non-blocking operation.
*/
int begin_nbo_phase_two(const wsrep::key_array& keys);
/**
* End non-blocking operation phase two. This call will
* release TOI critical section and set the mode to m_local.
*/
int end_nbo_phase_two();
/**