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MXS-1810: Add transaction checksums

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Readwritesplit now calculates checksums for all successful and failed
transactions. This checksum is not of any practical use until the
transaction replaying is implemented.
This commit is contained in:
Markus Mäkelä
2018-04-19 09:25:19 +03:00
parent bb96c368c2
commit 53a5685dc2
2 changed files with 14 additions and 0 deletions
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12
server/modules/routing/readwritesplit/rwsplitsession.cc
View File

@ -399,6 +399,16 @@ void RWSplitSession::clientReply(GWBUF *writebuf, DCB *backend_dcb)
m_current_query.reset();
if (session_trx_is_ending(m_client->session))
{
m_trx_checksum.finalize(writebuf);
MXS_INFO("Transaction checksum: %s", m_trx_checksum.hex().c_str());
}
else if (session_trx_is_active(m_client->session))
{
m_trx_checksum.update(writebuf);
}
if (backend->reply_is_complete(writebuf))
{
/** Got a complete reply, acknowledge the write and decrement expected response count */
@ -548,6 +558,8 @@ void RWSplitSession::handleError(GWBUF *errmsgbuf, DCB *problem_dcb,
if (session_trx_is_active(session))
{
// We have an open transaction, we can't continue
m_trx_checksum.finalize();
MXS_INFO("Checksum of failed transaction: %s", m_trx_checksum.hex().c_str());
can_continue = false;
}

2
server/modules/routing/readwritesplit/rwsplitsession.hh
View File

@ -19,6 +19,7 @@
#include <maxscale/buffer.hh>
#include <maxscale/modutil.h>
#include <maxscale/utils.hh>
#include <maxscale/queryclassifier.hh>
#define TARGET_IS_MASTER(t) maxscale::QueryClassifier::target_is_master(t)
@ -136,6 +137,7 @@ public:
mxs::QueryClassifier m_qc; /**< The query classifier. */
uint64_t m_retry_duration; /**< Total time spent retrying queries */
mxs::Buffer m_current_query; /**< Current query being executed */
mxs::SHA1Checksum m_trx_checksum; /**< Transaction checksum */
private:
RWSplitSession(RWSplit* instance, MXS_SESSION* session,