创建gobject时glib gobject警告

rslzwgfq 于 2021-06-03 发布在 Flume

关注(0)|答案(3)|浏览(342)

我试图创建一个flume-thrift客户端在c（cïglib），但有困难创建gobject，应发送到服务器。在main.c中的行中出现以下错误：

`GLib-GObject-WARNING**: IA__g_object_new_valist: object class `ThriftFlumeEventType' has no property named `timestamp'`

flume\u types.h和flume\u types.c中的代码是由thrift自动生成的。告诉我你是否需要看更多的代码。我感谢所有能得到的帮助！
flume\u types.h中的部分代码：

struct _ThriftFlumeEvent
{ 
  ThriftStruct parent;

  /* public */
  gint64 timestamp;
  gboolean __isset_timestamp;
  Priority priority;
  gboolean __isset_priority;
  GByteArray * body;
  gboolean __isset_body;
  gint64 nanos;
  gboolean __isset_nanos;
  gchar * host;
  gboolean __isset_host;
  GHashTable * fields;
  gboolean __isset_fields;
};
typedef struct _ThriftFlumeEvent ThriftFlumeEvent;

GType thrift_flume_event_get_type (void);

# define TYPE_THRIFT_FLUME_EVENT (thrift_flume_event_get_type())

flume\u types.c中的部分代码：

void 
thrift_flume_event_instance_init (ThriftFlumeEvent * object)
{
  printf("thrift_flume_event_instance_init");

  /* satisfy -Wall */
  THRIFT_UNUSED_VAR (object);
  object->timestamp = 0;
  object->__isset_timestamp = FALSE;
  object->__isset_priority = FALSE;
  object->body = NULL;
  object->__isset_body = FALSE;
  object->nanos = 0;
  object->__isset_nanos = FALSE;
  object->host = NULL;
  object->__isset_host = FALSE;
  object->fields = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
  object->__isset_fields = FALSE;
}

GType
thrift_flume_event_get_type (void)
{
  static GType type = 0;

  if (type == 0)
  {
    static const GTypeInfo type_info =
    {
      sizeof (ThriftFlumeEventClass),
      NULL, /* base_init */
      NULL, /* base_finalize */
      (GClassInitFunc) thrift_flume_event_class_init,
      NULL, /* class_finalize */
      NULL, /* class_data */
      sizeof (ThriftFlumeEvent),
      0, /* n_preallocs */
      (GInstanceInitFunc) thrift_flume_event_instance_init,
      NULL, /* value_table */
    };

    type = g_type_register_static (THRIFT_TYPE_STRUCT,
                                   "ThriftFlumeEventType",
                                   &type_info, 0);
    type.timestamp;
  }

  return type;
}

main.c中的部分代码：

gpointer eventObj = g_object_new(TYPE_THRIFT_FLUME_EVENT,
                                     "timestamp", 0,
                                     "__isset_timestamp", 0,
                                     "priority", 0,
                                     "__isset_priority", 0,
                                     "body", 0,
                                     "__isset_body", 0,
                                     "nanos", 0,
                                     "__isset_nanos", 0,
                                     "fields", 0,
                                     "__isset_fields", 0,
                                     0);

flume thrift c glib

来源：https://stackoverflow.com/questions/17471332/glib-gobject-warning-when-creating-gobject

3条答案

按热度按时间

k5hmc34c1#

这在thrift 0.9.2中发生了变化：c（glib）编译器生成的表示thrift结构的对象现在将其成员公开为gobject属性，从而避免了直接修改对象示例结构的危险（和糟糕）做法。
从0.9.2开始，初始化struct对象的首选方法基本上是海报最初期望的方法：

ThriftFlumeEvent *event =
  g_object_new (TYPE_THRIFT_FLUME_EVENT,
                "timestamp", (gint64)t_stamp.tv_sec * 1000,
                "priority",  priority,
                ...
                NULL);

注意 __isset_ 字段由对象本身管理，不应直接设置。

赞(0）回复(0）举报 2021-06-03

cwxwcias2#

这就是问题的解决方案：

ThriftFlumeEvent *event = g_object_new(TYPE_THRIFT_FLUME_EVENT, 0);
event->timestamp = (gint64)t_stamp.tv_sec * 1000;
event->__isset_timestamp = TRUE;
event->priority = priority;
event->__isset_priority = TRUE;
...

赞(0）回复(0）举报 2021-06-03

lnlaulya3#

GObject 属性不是c结构成员。您需要通过 g_object_install_property 在klass init函数（https://developer.gnome.org/gobject/stable/gobject-the-base-object-type.html ). 您还需要从 GObject （或从 GObject ).
注意：在c中派生意味着它必须将父级作为其第一个成员，这样才能无缝地转换它（而不是指向 GObject !)
你应该读一本关于这个主题的书，它可能会变得相当复杂。

赞(0）回复(0）举报 2021-06-03

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创建gobject时glib gobject警告

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