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Interface changes required to store and remove fragments from high

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priority context.
This commit is contained in:
Teemu Ollakka
2018-07-09 18:12:48 +03:00
parent 958a916b25
commit 6f68c70d37
10 changed files with 85 additions and 26 deletions
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38
include/wsrep/high_priority_service.hpp
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@ -48,19 +48,43 @@ namespace wsrep
* as a part of the transaction. The caller must start a
* new transaction before applying a write set and must
* either commit to make changes persistent or roll back.
*/
virtual int apply_write_set(const wsrep::const_buffer&) = 0;
/**
*
*/
virtual int append_fragment(const wsrep::ws_meta&,
const wsrep::const_buffer& data) = 0;
virtual int apply_write_set(const wsrep::ws_meta&,
const wsrep::const_buffer&) = 0;
/**
* Append a fragment into fragment storage. This will be
* called after a non-committing fragment belonging to
* streaming transaction has been applied. The call will
* not be done within an open transaction, the implementation
* must start a new transaction and commit.
*
* Note that the call is not done from streaming transaction
* context, but from applier context.
*/
virtual int append_fragment_and_commit(
const wsrep::ws_handle& ws_handle,
const wsrep::ws_meta& ws_meta,
const wsrep::const_buffer& data) = 0;
/**
* Remove fragments belonging to streaming transaction.
* This method will be called within the streaming transaction
* before commit. The implementation must not commit the
* whole transaction. The call will be done from streaming
* transaction context.
*
* @param ws_meta Write set meta data for commit fragment.
*
* @return Zero on success, non-zero on failure.
*/
virtual int remove_fragments(const wsrep::ws_meta& ws_meta) = 0;
/**
* Commit a transaction.
*/
virtual int commit(const wsrep::ws_handle&, const wsrep::ws_meta&) = 0;
/**
* Roll back a transaction
*/