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Add configuration capabilities for persistent connections.

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This commit is contained in:
counterpoint
2015-06-02 15:44:57 +01:00
parent 739ea82e36
commit 1a76fc141d
6 changed files with 82 additions and 33 deletions
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45
server/core/dcb.c
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@ -56,6 +56,7 @@
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <dcb.h>
#include <spinlock.h>
#include <server.h>
@ -1297,7 +1298,9 @@ dcb_close(DCB *dcb)
{
char *user;
user = session_getUser(dcb->session);
if (user && dcb->server)
if (user && dcb->server
&& dcb->server->persistpoolmax
&& dcb_persistent_clean_count(dcb) < dcb->server->persistpoolmax)
{
dcb->user = strdup(user);
spinlock_acquire(&dcb->server->persistlock);
@ -2311,6 +2314,46 @@ dcb_null_auth(DCB *dcb, SERVER *server, SESSION *session, GWBUF *buf)
return 0;
}
/**
* Check persistent pool for expiry or excess size and count
*
* @param dcb The DCB being closed.
*/
int
dcb_persistent_clean_count(DCB *dcb)
{
int count = 0;
if (dcb)
{
SERVER *server = dcb->server;
DCB *previousdcb = NULL;
DCB *persistentdcb = server->persistent;
while (persistentdcb) {
if (count >= server->persistpoolmax || (persistentdcb->last_read + server->persistmaxtime) < time(NULL))
{
if (previousdcb) {
previousdcb->nextpersistent = persistentdcb->nextpersistent;
}
else
{
dcb->nextpersistent = persistentdcb->nextpersistent;
}
/** Call possible callback for this DCB in case of close */
dcb_call_callback(persistentdcb, DCB_REASON_CLOSE);
dcb_add_to_zombieslist(persistentdcb);
atomic_add(&server->stats.n_persistent, -1);
}
else
{
count++;
}
persistentdcb = persistentdcb->nextpersistent;
}
}
return count;
}
/**
* Return DCB counts optionally filtered by usage
*