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gdbusproxy: Add G_DBUS_PROXY_FLAGS_NO_MATCH_RULE flag

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D-Bus has an upper limit on number of Match rules and it's rather easy to hit
with a big number of proxies with signal subscriptions. This happens with
NetworkManager with hundreds of devices or connection settings. By passing
G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE to g_dbus_connection_signal_subscribe(), the
user can call AddMatch with a less granular match instead of a match per every
proxy.

Tests subsequently added by Philip Withnall.

Fixes: #1109
This commit is contained in:
Lubomir Rintel
2015-11-27 17:41:47 +01:00
committed by Philip Withnall
parent caf777984b
commit a107a328e4
3 changed files with 74 additions and 8 deletions
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66
gio/tests/gdbus-proxy.c
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@@ -701,7 +701,6 @@ test_basic (GDBusProxy *proxy)
connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL);
g_assert_true (g_dbus_proxy_get_connection (proxy) == connection);
g_assert_cmpint (g_dbus_proxy_get_flags (proxy), ==, G_DBUS_PROXY_FLAGS_NONE);
g_assert_null (g_dbus_proxy_get_interface_info (proxy));
g_assert_cmpstr (g_dbus_proxy_get_name (proxy), ==, "com.example.TestService");
g_assert_cmpstr (g_dbus_proxy_get_object_path (proxy), ==, "/com/example/TestObject");
@@ -720,7 +719,7 @@ test_basic (GDBusProxy *proxy)
g_assert_true (conn == connection);
g_assert_null (info);
g_assert_cmpint (flags, ==, G_DBUS_PROXY_FLAGS_NONE);
g_assert_cmpint (flags, ==, g_dbus_proxy_get_flags (proxy));
g_assert_cmpstr (name, ==, "com.example.TestService");
g_assert_cmpstr (path, ==, "/com/example/TestObject");
g_assert_cmpstr (interface, ==, "com.example.Frob");
@@ -763,7 +762,7 @@ kill_test_service (GDBusConnection *connection)
}
static void
test_proxy (void)
test_proxy_with_flags (GDBusProxyFlags flags)
{
GDBusProxy *proxy;
GDBusConnection *connection;
@@ -777,7 +776,7 @@ test_proxy (void)
g_assert_no_error (error);
error = NULL;
proxy = g_dbus_proxy_new_sync (connection,
G_DBUS_PROXY_FLAGS_NONE,
flags,
NULL, /* GDBusInterfaceInfo */
"com.example.TestService", /* name */
"/com/example/TestObject", /* object path */
@@ -809,6 +808,12 @@ test_proxy (void)
g_object_unref (connection);
}
static void
test_proxy (void)
{
test_proxy_with_flags (G_DBUS_PROXY_FLAGS_NONE);
}
/* ---------------------------------------------------------------------------------------------------- */
static void
@@ -930,6 +935,58 @@ test_wellknown_noauto (void)
g_source_remove (id);
}
typedef enum {
ADD_MATCH,
REMOVE_MATCH,
} AddOrRemove;
static void
add_or_remove_match_rule (GDBusConnection *connection,
AddOrRemove add_or_remove,
GVariant *match_rule)
{
GDBusMessage *message = NULL;
GError *error = NULL;
message = g_dbus_message_new_method_call ("org.freedesktop.DBus", /* name */
"/org/freedesktop/DBus", /* path */
"org.freedesktop.DBus", /* interface */
(add_or_remove == ADD_MATCH) ? "AddMatch" : "RemoveMatch");
g_dbus_message_set_body (message, match_rule);
g_dbus_connection_send_message (connection,
message,
G_DBUS_SEND_MESSAGE_FLAGS_NONE,
NULL,
&error);
g_assert_no_error (error);
g_clear_object (&message);
}
static void
test_proxy_no_match_rule (void)
{
GDBusConnection *connection = NULL;
GVariant *match_rule = NULL;
g_test_summary ("Test that G_DBUS_PROXY_FLAGS_NO_MATCH_RULE works");
g_test_bug ("https://gitlab.gnome.org/GNOME/glib/-/issues/1109");
connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL);
/* Add a custom match rule which matches everything. */
match_rule = g_variant_ref_sink (g_variant_new ("(s)", "type='signal'"));
add_or_remove_match_rule (connection, ADD_MATCH, match_rule);
/* Run the tests. */
test_proxy_with_flags (G_DBUS_PROXY_FLAGS_NO_MATCH_RULE);
/* Remove the match rule again. */
add_or_remove_match_rule (connection, REMOVE_MATCH, match_rule);
g_clear_pointer (&match_rule, g_variant_unref);
g_clear_object (&connection);
}
int
main (int argc,
char *argv[])
@@ -950,6 +1007,7 @@ main (int argc,
g_test_add_func ("/gdbus/proxy/no-properties", test_no_properties);
g_test_add_func ("/gdbus/proxy/wellknown-noauto", test_wellknown_noauto);
g_test_add_func ("/gdbus/proxy/async", test_async);
g_test_add_func ("/gdbus/proxy/no-match-rule", test_proxy_no_match_rule);
ret = session_bus_run();