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mirror of https://github.com/codership/wsrep-lib.git synced 2025-07-30 07:23:07 +03:00

Support for detaching prepared XA transactions

Add support for detaching XA transactions. This is useful for handling
the case where the DBMS client has a transaction in prepared state and
disconnects. Before disconnect, the DBMS calls the newly introduced
client_state::xa_detach(), to cleanup the local transaction and
convert it to a high priority transaction. The DBMS may later attempt
to terminate the transaction through client_state::commit_by_xid() or
client_state::rollback_by_xid().

Also in this patch:

- Fix client_state::close() so that it does not rollback transactions
  in prepared state
- Changed class wsrep::xid representation to hold enough information
  so that DBMS can convert to its native representation
- Fix potential infinite loop in
  server_state::find_streaming_applier(wsrep:xid&)
- Append SR keys on prepare fragment and make it pa_unsafe
- Handle one phase commit (simply fall back to two phase)
- Do not rollback prepared streaming clients in
  server_state::close_orphaned_transactions()
This commit is contained in:
Daniele Sciascia
2020-03-25 15:40:24 +01:00
parent 2da6e4894e
commit 965642eded
9 changed files with 167 additions and 29 deletions

View File

@ -66,6 +66,10 @@ namespace wsrep
: buffer_()
{ }
mutable_buffer(const mutable_buffer& b)
: buffer_(b.buffer_)
{ }
void resize(size_t s) { buffer_.resize(s); }
void clear()
@ -111,6 +115,11 @@ namespace wsrep
buffer_ = other.buffer_;
return *this;
}
bool operator==(const mutable_buffer& other) const
{
return buffer_ == other.buffer_;
}
private:
std::vector<char> buffer_;
};