void
qof_session_safe_save(QofSession *session, QofPercentageFunc percentage_func)
{
QofBackend *be = session->backend;
gint err;
char *msg = NULL;
g_return_if_fail( be != NULL );
g_return_if_fail( be->safe_sync != NULL );
be->percentage = percentage_func;
(be->safe_sync)( be, qof_session_get_book( session ));
err = qof_backend_get_error(session->backend);
msg = qof_backend_get_message(session->backend);
if (err != ERR_BACKEND_NO_ERR)
{
g_free(session->book_id);
session->book_id = NULL;
qof_session_push_error (session, err, msg);
}
}
static void
qof_session_destroy_backend (QofSession *session)
{
g_return_if_fail (session);
if (session->backend)
{
/* clear any error message */
char * msg = qof_backend_get_message (session->backend);
g_free (msg);
/* Then destroy the backend */
if (session->backend->destroy_backend)
{
session->backend->destroy_backend(session->backend);
}
else
{
g_free(session->backend);
}
}
session->backend = NULL;
}
void
qof_session_begin (QofSession *session, const char * book_id,
gboolean ignore_lock, gboolean create, gboolean force)
{
gchar *scheme = NULL, *filename = NULL;
if (!session) return;
ENTER (" sess=%p ignore_lock=%d, book-id=%s",
session, ignore_lock,
book_id ? book_id : "(null)");
/* Clear the error condition of previous errors */
qof_session_clear_error (session);
/* Check to see if this session is already open */
if (session->book_id)
{
if (ERR_BACKEND_NO_ERR != qof_session_get_error(session))
qof_session_push_error (session, ERR_BACKEND_LOCKED, NULL);
LEAVE("push error book is already open ");
return;
}
/* seriously invalid */
if (!book_id)
{
if (ERR_BACKEND_NO_ERR != qof_session_get_error(session))
qof_session_push_error (session, ERR_BACKEND_BAD_URL, NULL);
LEAVE("push error missing book_id");
return;
}
scheme = g_uri_parse_scheme (book_id);
if (g_strcmp0 (scheme, "file") == 0)
filename = g_filename_from_uri (book_id, NULL, NULL);
else if (!scheme)
filename = g_strdup (book_id);
if (filename && g_file_test (filename, G_FILE_TEST_IS_DIR))
{
if (ERR_BACKEND_NO_ERR == qof_session_get_error(session))
qof_session_push_error (session, ERR_BACKEND_BAD_URL, NULL);
g_free (filename);
g_free (scheme);
LEAVE("Can't open a directory");
return;
}
/* destroy the old backend */
qof_session_destroy_backend(session);
/* Store the session URL */
session->book_id = g_strdup (book_id);
if (filename)
qof_session_load_backend(session, "file");
else /* access method found, load appropriate backend */
qof_session_load_backend(session, scheme);
g_free (filename);
g_free (scheme);
/* No backend was found. That's bad. */
if (NULL == session->backend)
{
g_free(session->book_id);
session->book_id = NULL;
if (ERR_BACKEND_NO_ERR == qof_session_get_error(session))
qof_session_push_error (session, ERR_BACKEND_BAD_URL, NULL);
LEAVE (" BAD: no backend: sess=%p book-id=%s",
session, book_id ? book_id : "(null)");
return;
}
/* If there's a begin method, call that. */
if (session->backend->session_begin)
{
char *msg;
QofBackendError err;
(session->backend->session_begin)(session->backend, session,
session->book_id, ignore_lock,
create, force);
PINFO("Done running session_begin on backend");
err = qof_backend_get_error(session->backend);
msg = qof_backend_get_message(session->backend);
if (err != ERR_BACKEND_NO_ERR)
{
g_free(session->book_id);
session->book_id = NULL;
qof_session_push_error (session, err, msg);
LEAVE(" backend error %d %s", err, msg ? msg : "(null)");
return;
}
if (msg != NULL)
{
PWARN("%s", msg);
g_free(msg);
}
}
LEAVE (" sess=%p book-id=%s",
session, book_id ? book_id : "(null)");
}
void
qof_session_save (QofSession *session,
QofPercentageFunc percentage_func)
{
GList *node;
QofBackend *be;
gboolean partial, change_backend;
QofBackendProvider *prov;
GSList *p;
QofBook *book, *abook;
int err;
gint num;
char *msg = NULL;
char *book_id;
if (!session) return;
if (!g_atomic_int_dec_and_test(&session->lock))
goto leave;
ENTER ("sess=%p book_id=%s",
session, session->book_id ? session->book_id : "(null)");
/* Partial book handling. */
book = qof_session_get_book(session);
partial = (gboolean)GPOINTER_TO_INT(qof_book_get_data(book, PARTIAL_QOFBOOK));
change_backend = FALSE;
msg = g_strdup_printf(" ");
book_id = g_strdup(session->book_id);
if (partial == TRUE)
{
if (session->backend && session->backend->provider)
{
prov = session->backend->provider;
if (TRUE == prov->partial_book_supported)
{
/* if current backend supports partial, leave alone. */
change_backend = FALSE;
}
else
{
change_backend = TRUE;
}
}
/* If provider is undefined, assume partial not supported. */
else
{
change_backend = TRUE;
}
}
if (change_backend == TRUE)
{
qof_session_destroy_backend(session);
if (!qof_providers_initialized)
{
qof_providers_initialized = TRUE;
}
p = provider_list;
while (p != NULL)
{
prov = p->data;
if (TRUE == prov->partial_book_supported)
{
/** \todo check the access_method too, not in scope here, yet. */
/* if((TRUE == prov->partial_book_supported) &&
(0 == g_ascii_strcasecmp (access_method, prov->access_method)))
{*/
if (NULL == prov->backend_new) continue;
/* Use the providers creation callback */
session->backend = (*(prov->backend_new))();
session->backend->provider = prov;
if (session->backend->session_begin)
{
/* Call begin - backend has been changed,
so make sure a file can be written,
use ignore_lock and force create */
g_free(session->book_id);
session->book_id = NULL;
(session->backend->session_begin)(session->backend, session,
book_id, TRUE, TRUE, TRUE);
PINFO("Done running session_begin on changed backend");
err = qof_backend_get_error(session->backend);
msg = qof_backend_get_message(session->backend);
if (err != ERR_BACKEND_NO_ERR)
{
g_free(session->book_id);
session->book_id = NULL;
qof_session_push_error (session, err, msg);
LEAVE("changed backend error %d", err);
goto leave;
}
if (msg != NULL)
{
PWARN("%s", msg);
g_free(msg);
msg = NULL;
}
}
/* Tell the books about the backend that they'll be using. */
for (node = session->books; node; node = node->next)
{
book = node->data;
qof_book_set_backend (book, session->backend);
}
p = NULL;
}
if (p)
{
p = p->next;
}
}
if (!session->backend)
{
if (ERR_BACKEND_NO_ERR != qof_session_get_error(session))
{
msg = g_strdup_printf("failed to load backend");
qof_session_push_error(session, ERR_BACKEND_NO_HANDLER, msg);
}
goto leave;
}
}
/* If there is a backend, and the backend is reachable
* (i.e. we can communicate with it), then synchronize with
* the backend. If we cannot contact the backend (e.g.
* because we've gone offline, the network has crashed, etc.)
* then give the user the option to save to the local disk.
*
* hack alert -- FIXME -- XXX the code below no longer
* does what the words above say. This needs fixing.
*/
be = session->backend;
if (be)
{
for (node = session->books; node; node = node->next)
{
abook = node->data;
/* if invoked as SaveAs(), then backend not yet set */
qof_book_set_backend (abook, be);
be->percentage = percentage_func;
if (be->sync)
{
(be->sync)(be, abook);
if (save_error_handler(be, session))
goto leave;
}
}
/* If we got to here, then the backend saved everything
* just fine, and we are done. So return. */
/* Return the book_id to previous value. */
qof_session_clear_error (session);
LEAVE("Success");
goto leave;
}
else
{
if (ERR_BACKEND_NO_ERR != qof_session_get_error(session))
{
msg = g_strdup_printf("failed to load backend");
qof_session_push_error(session, ERR_BACKEND_NO_HANDLER, msg);
}
}
LEAVE("error -- No backend!");
leave:
if (msg != NULL) g_free(msg);
g_atomic_int_inc(&session->lock);
return;
}
void
qof_session_begin (QofSession *session, const char * book_id,
gboolean ignore_lock, gboolean create, gboolean force)
{
gchar **splituri;
if (!session) return;
ENTER (" sess=%p ignore_lock=%d, book-id=%s",
session, ignore_lock,
book_id ? book_id : "(null)");
/* Clear the error condition of previous errors */
qof_session_clear_error (session);
/* Check to see if this session is already open */
if (session->book_id)
{
if (ERR_BACKEND_NO_ERR != qof_session_get_error(session))
qof_session_push_error (session, ERR_BACKEND_LOCKED, NULL);
LEAVE("push error book is already open ");
return;
}
/* seriously invalid */
if (!book_id)
{
if (ERR_BACKEND_NO_ERR != qof_session_get_error(session))
qof_session_push_error (session, ERR_BACKEND_BAD_URL, NULL);
LEAVE("push error missing book_id");
return;
}
/* destroy the old backend */
qof_session_destroy_backend(session);
/* Store the session URL */
session->book_id = g_strdup (book_id);
/* Look for something of the form of "file://", "http://" or
* "postgres://". Everything before the colon is the access
* method. Load the first backend found for that access method.
*/
splituri = g_strsplit ( book_id, "://", 2 );
if ( splituri[1] == NULL ) /* no access method in the uri, use generic "file" backend */
qof_session_load_backend(session, "file");
else /* access method found, load appropriate backend */
qof_session_load_backend(session, splituri[0]);
g_strfreev ( splituri );
/* No backend was found. That's bad. */
if (NULL == session->backend)
{
g_free(session->book_id);
session->book_id = NULL;
if (ERR_BACKEND_NO_ERR == qof_session_get_error(session))
qof_session_push_error (session, ERR_BACKEND_BAD_URL, NULL);
LEAVE (" BAD: no backend: sess=%p book-id=%s",
session, book_id ? book_id : "(null)");
return;
}
/* If there's a begin method, call that. */
if (session->backend->session_begin)
{
char *msg;
int err;
(session->backend->session_begin)(session->backend, session,
session->book_id, ignore_lock,
create, force);
PINFO("Done running session_begin on backend");
err = qof_backend_get_error(session->backend);
msg = qof_backend_get_message(session->backend);
if (err != ERR_BACKEND_NO_ERR)
{
g_free(session->book_id);
session->book_id = NULL;
qof_session_push_error (session, err, msg);
LEAVE(" backend error %d %s", err, msg ? msg : "(null)");
return;
}
if (msg != NULL)
{
PWARN("%s", msg);
g_free(msg);
}
}
LEAVE (" sess=%p book-id=%s",
session, book_id ? book_id : "(null)");
}
