void
db_state_change(struct kore_pgsql *pgsql, void *arg)
{
struct connection *c = arg;
printf("%p: state change on pgsql %d\n", arg, pgsql->state);
switch (pgsql->state) {
case KORE_PGSQL_STATE_INIT:
db_init(c, pgsql);
break;
case KORE_PGSQL_STATE_WAIT:
break;
case KORE_PGSQL_STATE_COMPLETE:
kore_connection_disconnect(c);
break;
case KORE_PGSQL_STATE_ERROR:
kore_pgsql_logerror(pgsql);
kore_connection_disconnect(c);
break;
case KORE_PGSQL_STATE_RESULT:
db_results(pgsql, c);
break;
default:
kore_pgsql_continue(pgsql);
break;
}
}
/*
* After firing off the query, we returned HTTP_STATE_RETRY (see above).
* When request_db_wait() finally is called by Kore we will have results
* from pgsql so we'll process them.
*/
int
request_db_wait(struct http_request *req)
{
struct rstate *state = req->hdlr_extra;
kore_log(LOG_NOTICE, "request_db_wait: %d", state->sql.state);
/*
* When we get here, our asynchronous pgsql query has
* given us something, check the state to figure out what.
*/
switch (state->sql.state) {
case KORE_PGSQL_STATE_WAIT:
return (HTTP_STATUS_RETRY);
case KORE_PGSQL_STATE_COMPLETE:
req->fsm_state = REQ_STATE_DONE;
break;
case KORE_PGSQL_STATE_ERROR:
req->fsm_state = REQ_STATE_ERROR;
kore_pgsql_logerror(&state->sql);
break;
case KORE_PGSQL_STATE_RESULT:
req->fsm_state = REQ_STATE_DB_READ;
break;
default:
/* This MUST be present in order to advance the pgsql state */
kore_pgsql_continue(req, &state->sql);
break;
}
return (HTTP_STATE_CONTINUE);
}
void
db_results(struct kore_pgsql *pgsql, struct connection *c)
{
char *name;
int i, rows;
rows = kore_pgsql_ntuples(pgsql);
for (i = 0; i < rows; i++) {
name = kore_pgsql_getvalue(pgsql, i, 0);
net_send_queue(c, name, strlen(name));
}
net_send_flush(c);
kore_pgsql_continue(pgsql);
}
/*
* Called when there's an actual result to be gotten. After we handle the
* entire result, we'll drop back into REQ_STATE_DB_WAIT (above) in order
* to continue until the pgsql API returns KORE_PGSQL_STATE_COMPLETE.
*/
int
request_db_read(struct http_request *req)
{
char *name;
int i, rows;
struct rstate *state = req->hdlr_extra;
/* We have sql data to read! */
rows = kore_pgsql_ntuples(&state->sql);
for (i = 0; i < rows; i++) {
name = kore_pgsql_getvalue(&state->sql, i, 0);
kore_log(LOG_NOTICE, "name: '%s'", name);
}
/* Continue processing our query results. */
kore_pgsql_continue(req, &state->sql);
/* Back to our DB waiting state. */
req->fsm_state = REQ_STATE_DB_WAIT;
return (HTTP_STATE_CONTINUE);
}