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Code Activity

* Moved causal reads/gtid wait into server state interface

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* Changed undefined seqno to be defined as -1
This commit is contained in:
Teemu Ollakka
2018-06-21 10:37:55 +03:00
parent ef0fb72b73
commit 3a8861b26b
12 changed files with 167 additions and 65 deletions
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52
include/wsrep/client_state.hpp
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@ -4,10 +4,17 @@
/** @file client_state.hpp
*
*
* Return value conventions:
*
* The calls which may alter either client_state or associated
* transaction state will generally return zero on success and
* non-zero on failure. More detailed error information is stored
* into client state and persisted there until explicitly cleared.
*/
#ifndef WSREP_CLIENT_CONTEXT_HPP
#define WSREP_CLIENT_CONTEXT_HPP
#ifndef WSREP_CLIENT_STATE_HPP
#define WSREP_CLIENT_STATE_HPP
#include "server_state.hpp"
#include "provider.hpp"
@ -34,7 +41,7 @@ namespace wsrep
e_append_fragment_error
};
static inline const char* to_string(enum client_error error)
static inline const char* to_c_string(enum client_error error)
{
switch (error)
{
@ -48,6 +55,10 @@ namespace wsrep
return "unknown";
}
static inline std::string to_string(enum client_error error)
{
return to_c_string(error);
}
/**
* Client State
*/
@ -382,45 +393,18 @@ namespace wsrep
transaction_.streaming_context_ = transaction.streaming_context_;
}
//
// Causal reads
//
/**
* Perform a causal read in the cluster. After the call returns,
* all the causally preceding write sets have been committed
* or the error is returned.
*
* This operation may require communication with other processes
* in the DBMS cluster, so it may be relatively heavy operation.
* Method wait_for_gtid() should be used whenever possible.
*/
enum wsrep::provider::status causal_read() const;
/**
* Wait until all the write sets up to given GTID have been
* committed.
*
* @return Zero on success, non-zero on failure.
*/
enum wsrep::provider::status wait_for_gtid(const wsrep::gtid&) const;
//
//
//
/** @name Non-transactional operations */
/** @{*/
/**
* Enter total order isolation critical section.
*/
enum wsrep::provider::status enter_toi();
int enter_toi(const wsrep::key_array&, const wsrep::const_buffer&);
/**
* Leave total order isolation critical section.
*/
void leave_toi();
int leave_toi();
/**
* Begin non-blocking operation.
@ -430,7 +414,7 @@ namespace wsrep
/**
* End non-blocking operation
*/
void end_nbo();
int end_nbo();
/**
* Get reference to the client mutex.
@ -696,4 +680,4 @@ namespace wsrep
};
}
#endif // WSREP_CLIENT_CONTEXT_HPP
#endif // WSREP_CLIENT_STATE_HPP