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Add an example of exporting a GObject
This is more manual work than dbus-glib.
This commit is contained in:
Matthias Clasen
parent
ea1e0496b0
commit
9a065edf6f
@ -156,6 +156,8 @@
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* <example id="gdbus-subtree-server"><title>D-Bus subtree example</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-subtree.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
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*
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* <example id="gdbus-unix-fd-client"><title>D-Bus UNIX File Descriptor example</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-unix-fd-client.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
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*
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* <example id="gdbus-export"><title>Exporting a GObject</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-export.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
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*/
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/* ---------------------------------------------------------------------------------------------------- */
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@ -58,6 +58,7 @@ SAMPLE_PROGS = \
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httpd \
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send-data \
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filter-cat \
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gdbus-example-export \
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gdbus-example-own-name \
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gdbus-example-watch-name \
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gdbus-example-watch-proxy \
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@ -234,6 +235,9 @@ gdbus_example_peer_LDADD = $(progs_ldadd)
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gdbus_example_proxy_subclass_SOURCES = gdbus-example-proxy-subclass.c
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gdbus_example_proxy_subclass_LDADD = $(progs_ldadd)
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gdbus_example_export_SOURCES = gdbus-example-export.c
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gdbus_example_export_LDADD = $(progs_ldadd)
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EXTRA_DIST += \
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socket-common.c \
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org.gtk.test.gschema \
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331
gio/tests/gdbus-example-export.c
Normal file
331
gio/tests/gdbus-example-export.c
Normal file
@ -0,0 +1,331 @@
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#include <gio/gio.h>
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#include <stdlib.h>
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* ---------------------------------------------------------------------------------------------------- */
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/* The object we want to export */
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typedef struct _MyObjectClass MyObjectClass;
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typedef struct _MyObject MyObject;
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struct _MyObjectClass
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{
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GObjectClass parent_class;
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};
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struct _MyObject
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{
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GObject parent_instance;
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gint count;
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gchar *name;
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};
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enum
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{
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PROP_0,
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PROP_COUNT,
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PROP_NAME
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};
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G_DEFINE_TYPE (MyObject, my_object, G_TYPE_OBJECT);
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static void
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my_object_finalize (GObject *object)
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{
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MyObject *myobj = (MyObject*)object;
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g_free (myobj->name);
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G_OBJECT_CLASS (my_object_parent_class)->finalize (object);
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}
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static void
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my_object_init (MyObject *object)
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{
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object->count = 0;
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object->name = NULL;
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}
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static void
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my_object_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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MyObject *myobj = (MyObject*)object;
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switch (prop_id)
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{
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case PROP_COUNT:
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g_value_set_int (value, myobj->count);
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break;
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case PROP_NAME:
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g_value_set_string (value, myobj->name);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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my_object_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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MyObject *myobj = (MyObject*)object;
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switch (prop_id)
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{
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case PROP_COUNT:
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myobj->count = g_value_get_int (value);
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break;
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case PROP_NAME:
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g_free (myobj->name);
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myobj->name = g_value_dup_string (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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my_object_class_init (MyObjectClass *class)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (class);
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gobject_class->finalize = my_object_finalize;
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gobject_class->set_property = my_object_set_property;
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gobject_class->get_property = my_object_get_property;
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g_object_class_install_property (gobject_class,
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PROP_COUNT,
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g_param_spec_int ("count",
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"Count",
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"Count",
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0, 99999, 0,
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G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_NAME,
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g_param_spec_string ("name",
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"Name",
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"Name",
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NULL,
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G_PARAM_READWRITE));
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}
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/* A method that we want to export */
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void
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my_object_change_count (MyObject *myobj,
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gint change)
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{
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myobj->count = 2 * myobj->count + change;
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g_object_notify (G_OBJECT (myobj), "count");
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}
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static GDBusNodeInfo *introspection_data = NULL;
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/* Introspection data for the service we are exporting */
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static const gchar introspection_xml[] =
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"<node>"
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" <interface name='org.myorg.MyObject'>"
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" <method name='ChangeCount'>"
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" <arg type='i' name='change' direction='in'/>"
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" </method>"
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" <property type='i' name='Count' access='read'/>"
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" <property type='s' name='Name' access='readwrite'/>"
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" </interface>"
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"</node>";
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static void
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handle_method_call (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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GDBusMethodInvocation *invocation,
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gpointer user_data)
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{
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MyObject *myobj = user_data;
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if (g_strcmp0 (method_name, "ChangeCount") == 0)
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{
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gint change;
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g_variant_get (parameters, "(i)", &change);
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my_object_change_count (myobj, change);
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g_dbus_method_invocation_return_value (invocation, NULL);
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}
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}
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static GVariant *
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handle_get_property (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GError **error,
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gpointer user_data)
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{
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GVariant *ret;
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MyObject *myobj = user_data;
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ret = NULL;
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if (g_strcmp0 (property_name, "Count") == 0)
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{
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ret = g_variant_new_int32 (myobj->count);
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}
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else if (g_strcmp0 (property_name, "Name") == 0)
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{
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ret = g_variant_new_string (myobj->name ? myobj->name : "");
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}
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return ret;
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}
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static gboolean
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handle_set_property (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GVariant *value,
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GError **error,
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gpointer user_data)
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{
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MyObject *myobj = user_data;
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if (g_strcmp0 (property_name, "Count") == 0)
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{
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g_object_set (myobj, "count", g_variant_get_int32 (value), NULL);
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}
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else if (g_strcmp0 (property_name, "Name") == 0)
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{
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g_object_set (myobj, "name", g_variant_get_string (value, NULL), NULL);
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}
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return TRUE;
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}
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/* for now */
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static const GDBusInterfaceVTable interface_vtable =
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{
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handle_method_call,
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handle_get_property,
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handle_set_property
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};
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static void
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send_property_change (GObject *obj,
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GParamSpec *pspec,
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GDBusConnection *connection)
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{
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GVariantBuilder *builder;
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MyObject *myobj = (MyObject *)obj;
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builder = g_variant_builder_new (G_VARIANT_TYPE_ARRAY);
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if (g_strcmp0 (pspec->name, "count") == 0)
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g_variant_builder_add (builder,
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"{sv}",
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"Count", g_variant_new_int32 (myobj->count));
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else if (g_strcmp0 (pspec->name, "name") == 0)
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g_variant_builder_add (builder,
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"{sv}",
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"Name", g_variant_new_string (myobj->name ? myobj->name : ""));
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g_dbus_connection_emit_signal (connection,
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NULL,
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"/org/myorg/MyObject",
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"org.myorg.MyObject",
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"PropertiesChanged",
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g_variant_new ("(sa{sv})",
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"org.myorg.MyObject",
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builder),
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NULL);
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}
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static void
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on_bus_acquired (GDBusConnection *connection,
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const gchar *name,
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gpointer user_data)
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{
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MyObject *myobj = user_data;
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guint registration_id;
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g_signal_connect (myobj, "notify",
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G_CALLBACK (send_property_change), connection);
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registration_id = g_dbus_connection_register_object (connection,
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"/org/myorg/MyObject",
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"org.myorg.MyObject",
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introspection_data->interfaces[0],
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&interface_vtable,
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myobj,
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NULL, /* user_data_free_func */
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NULL); /* GError** */
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g_assert (registration_id > 0);
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}
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static void
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on_name_acquired (GDBusConnection *connection,
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const gchar *name,
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gpointer user_data)
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{
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}
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static void
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on_name_lost (GDBusConnection *connection,
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const gchar *name,
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gpointer user_data)
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{
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exit (1);
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}
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int
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main (int argc, char *argv[])
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{
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guint owner_id;
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GMainLoop *loop;
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MyObject *myobj;
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g_type_init ();
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/* We are lazy here - we don't want to manually provide
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* the introspection data structures - so we just build
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* them from XML.
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*/
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introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
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g_assert (introspection_data != NULL);
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myobj = g_object_new (my_object_get_type (), NULL);
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owner_id = g_bus_own_name (G_BUS_TYPE_SESSION,
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"org.myorg.MyObject",
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G_BUS_NAME_OWNER_FLAGS_NONE,
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on_bus_acquired,
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on_name_acquired,
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on_name_lost,
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myobj,
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NULL);
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loop = g_main_loop_new (NULL, FALSE);
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g_main_loop_run (loop);
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g_bus_unown_name (owner_id);
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g_dbus_node_info_unref (introspection_data);
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g_object_unref (myobj);
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return 0;
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}
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