hcq/MaxScale
hcq/MaxScale
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'release-1.0GA' of https://github.com/mariadb-corporation/MaxScale into release-1.0GA

Browse Source
This commit is contained in:
Markus Makela 2015-01-05 06:09:39 +02:00
commit 185e5b82d6
1 changed files with 45 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
server/modules/routing/readwritesplit/readwritesplit.c
View File

@ -4059,8 +4059,16 @@ return_rc:
* Suppress redundant OK packets sent by backends.
*
* The first OK packet is replied to the client.
* Return true if succeed, false is returned if router session was closed or
* if execute_sescmd_in_backend failed.
*
* @param router_cli_ses Client's router session pointer
* @param querybuf GWBUF including the query to be routed
* @param inst Router instance
* @param packet_type Type of MySQL packet
* @param qtype Query type from query_classifier
*
* @return True if at least one backend is used and routing succeed to all
* backends being used, otherwise false.
*
*/
static bool route_session_write(
ROUTER_CLIENT_SES* router_cli_ses,
@ -4073,11 +4081,18 @@ static bool route_session_write(
rses_property_t* prop;
backend_ref_t* backend_ref;
int i;
int max_nslaves;
int nbackends;
int nsucc;
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Session write, routing to all servers.")));
/** Maximum number of slaves in this router client session */
max_nslaves = rses_get_max_slavecount(router_cli_ses,
router_cli_ses->rses_nbackends);
nsucc = 0;
nbackends = 0;
backend_ref = router_cli_ses->rses_backend_ref;
/**
@ -4091,13 +4106,10 @@ static bool route_session_write(
packet_type == MYSQL_COM_STMT_CLOSE)
{
int rc;
succp = true;
/** Lock router session */
/** Lock router session */
if (!rses_begin_locked_router_action(router_cli_ses))
{
succp = false;
goto return_succp;
}
@ -4119,12 +4131,11 @@ static bool route_session_write(
if (BREF_IS_IN_USE((&backend_ref[i])))
{
rc = dcb->func.write(dcb, gwbuf_clone(querybuf));
if (rc != 1)
{
succp = false;
}
nbackends += 1;
if ((rc = dcb->func.write(dcb, gwbuf_clone(querybuf))) == 1)
{
nsucc += 1;
}
}
}
rses_end_locked_router_action(router_cli_ses);
@ -4134,13 +4145,16 @@ static bool route_session_write(
/** Lock router session */
if (!rses_begin_locked_router_action(router_cli_ses))
{
succp = false;
goto return_succp;
}
if (router_cli_ses->rses_nbackends <= 0)
{
succp = false;
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Router session doesn't have any backends in use. "
"Routing failed. <")));
goto return_succp;
}
/**
@ -4160,6 +4174,8 @@ static bool route_session_write(
{
sescmd_cursor_t* scur;
nbackends += 1;
if (LOG_IS_ENABLED(LOGFILE_TRACE))
{
LOGIF(LT, (skygw_log_write(
@ -4187,8 +4203,7 @@ static bool route_session_write(
*/
if (sescmd_cursor_is_active(scur))
{
succp = true;
nsucc += 1;
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Backend %s:%d already executing sescmd.",
@ -4197,10 +4212,12 @@ static bool route_session_write(
}
else
{
succp = execute_sescmd_in_backend(&backend_ref[i]);
if (!succp)
{
if (execute_sescmd_in_backend(&backend_ref[i]))
{
nsucc += 1;
}
else
{
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Error : Failed to execute session "
@ -4210,18 +4227,20 @@ static bool route_session_write(
}
}
}
else
{
succp = false;
}
}
/** Unlock router session */
rses_end_locked_router_action(router_cli_ses);
return_succp:
/**
* Routing must succeed to all backends that are used.
* There must be at leas one and at most max_nslaves+1 backends.
*/
succp = (nbackends > 0 && nsucc == nbackends && nbackends <= max_nslaves+1);
return succp;
}
#if defined(NOT_USED)
static bool router_option_configured(