problem with service : Error: Message did not receive a reply
(timeout by message bus)
John (J5) Palmieri
johnp at redhat.com
Thu Mar 8 08:04:29 PST 2007
On Thu, 2007-03-08 at 04:56 +0000, amol gajewar wrote:
> hi
> I am launching one service through client and trying to invoke method
> exposed by service to message bus, but i am getting following error,
>
> Error: Message did not receive a reply (timeout by message bus)
>
> Following is code
>
> server.c
>
> #include <stdio.h>
> #include <glib-object.h>
> #include <glib/gi18n.h>
> #include <dbus/dbus-glib.h>
> #include <dbus/dbus-glib-bindings.h>
> #include "server.h"
>
> static gboolean my_server_many_args()
> {
> if(1)
> {
> FILE* fp;
> fp = fopen("nefile","w");
> fclose(fp);
> printf("\nmy_server_many_args\n");
> return TRUE;
> }
> return FALSE;
> }
>
> #include "my-server-glue.h"
>
>
>
> static GMainLoop *loop;
> DBusGConnection *connection;
> static MyServer *server;
>
> G_DEFINE_TYPE(MyServer, my_server, G_TYPE_OBJECT);
>
> /* Class init */
> static void
> my_server_class_init (MyServerClass *my_server_class)
> {
> //g_type_class_add_private (e_data_book_factory_class, sizeof
> (EDataBookFactoryPrivate));
> printf("\ni am class init\n");
> dbus_g_object_type_install_info (G_TYPE_FROM_CLASS
> (my_server_class), &dbus_glib__object_info);
> }
>
> /* Instance init */
> static void
> my_server_init (MyServer *server)
> {
> }
>
>
>
> int
> main (int argc, char **argv)
> {
>
>
> GError *error = NULL;
> DBusGProxy *proxy;
> char req_name = {"amol.gajewar"};
> guint32 request_name_ret,flags;
>
> g_type_init ();
>
> loop = g_main_loop_new (NULL, FALSE);
>
> /* Obtain a connection to the session bus */
> //connection = dbus_g_bus_get (DBUS_BUS_SESSION, &error);
> connection = dbus_g_bus_get (getenv("DBUS_STARTER_ADD"),&error);
>
> if (connection == NULL)
> {
> printf("\nFailed to open connection to bus\n");
> }
>
> proxy = dbus_g_proxy_new_for_name (connection,
> DBUS_SERVICE_DBUS,
> DBUS_PATH_DBUS,
> DBUS_INTERFACE_DBUS);
>
>
>
> #if 1
>
> if(!org_freedesktop_DBus_request_name (proxy, "com.example", 0,
> &request_name_ret, &error))
> {
> g_warning ("There was an error requesting the name: %s",
> error->message); g_error_free (error); return FALSE;
> }
>
> #endif
>
>
> server = g_object_new (TYPE_MY_SERVER, NULL);
>
> dbus_g_connection_register_g_object
> (connection,"/com/example/MyServer", G_OBJECT (server));
> g_main_loop_run (loop);
>
> dbus_g_connection_unref (connection);
> return 0;
> }
>
>
> client.c
>
> #define GETTEXT_PACKAGE
> #include <dbus-1.0/dbus/dbus.h>
> #include <glib-object.h>
> #include <glib/gi18n-lib.h>
> #include <dbus-1.0/dbus/dbus-glib.h>
> #include <dbus-1.0/dbus/dbus-glib-lowlevel.h>
> #include "my-server-bindings.h"
>
>
>
> static GMainLoop *loop;
>
> int main (int argc, char **argv)
> {
> DBusGConnection *connection;
> DBusGProxy *proxy,*newproxy;
> DBusMessage *message;
> DBusError derror;
>
> GError *error;
> char **name_list;
> char **name_list_ptr;
>
> guint32 request_name_ret;
>
> g_type_init ();
>
> // loop = g_main_loop_new (NULL, FALSE);
>
> error = NULL;
> connection = dbus_g_bus_get (DBUS_BUS_SESSION,
> &error);
>
> if (connection == NULL)
> {
> g_printerr ("Failed to open connection to bus: %s\n",
> error->message);
> g_error_free (error);
> exit (1);
> }
>
> /* Create a proxy object for the "bus driver" (name
> "org.freedesktop.DBus") */
> #if 1
> newproxy = dbus_g_proxy_new_for_name (connection,
> DBUS_SERVICE_DBUS,
> DBUS_PATH_DBUS,
> DBUS_INTERFACE_DBUS);
>
> #if 1
> dbus_error_init (&derror);
> printf("\nstarting\n");
> if (!dbus_bus_start_service_by_name
> (dbus_g_connection_get_connection (connection),
> "com.example",
> 0, NULL, &derror)) {
> dbus_set_g_error (error, &derror);
> dbus_error_free (&derror);
> printf("\n i am failed 1 \n");
> g_printerr ("Error: %s\n", error->message);
> return FALSE;
> }
> printf("\nstarted\n");
> #endif
> /* Call ListNames method, wait for reply */
> error = NULL;
> if (!dbus_g_proxy_call (newproxy, "ListNames", &error,
> G_TYPE_INVALID,
> G_TYPE_STRV, &name_list, G_TYPE_INVALID))
> {
> /* Just do demonstrate remote exceptions versus regular GError
> */
> if (error->domain == DBUS_GERROR && error->code ==
> DBUS_GERROR_REMOTE_EXCEPTION)
> g_printerr ("Caught remote method exception %s: %s",
> dbus_g_error_get_name (error),
> error->message);
> else
> g_printerr ("Error: %s\n", error->message);
> g_error_free (error);
> exit (1);
> }
> /* Print the results */
>
> g_print ("Names on the message bus:\n");
>
> for (name_list_ptr = name_list; *name_list_ptr; name_list_ptr++)
> {
> g_print (" %s\n", *name_list_ptr);
> }
> g_strfreev (name_list);
>
>
> #endif
> #if 1
> proxy = dbus_g_proxy_new_for_name_owner
> (connection,"com.example","/com/example/MyServer","com.example.MyServer", &error);
>
> if (!proxy) {
> g_printerr ("Error: %s\n", error->message);
> printf("i am failed 2 ");
> return FALSE;
> }
>
>
>
> if(!com_example_MyServer_many_args (proxy,&error))
> {
> printf("\ni am failed\n");
>
> /* Just do demonstrate remote exceptions versus regular GError
> */
> if (error->domain == DBUS_GERROR && error->code ==
> DBUS_GERROR_REMOTE_EXCEPTION)
> g_printerr ("Caught remote method exception %s: %s",
> dbus_g_error_get_name (error),
> error->message);
> else
> g_printerr ("Error: %s\n", error->message);
> g_error_free (error);
> exit (1);
> }
>
> #endif
>
>
> g_object_unref (newproxy);
> g_object_unref (proxy);
> return 0;
> }
>
>
> any pointers on this are welcome
>
What is the full output of both the server and the client (it is useful
to see the printf's)? and can you post the introspect xml file used to
generate the D-Bus mappings. Thanks. It is also useful to see if that
matches up with introspection data given by the bus.
--
John (J5) Palmieri <johnp at redhat.com>
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