Glib学习（29） gdbus 的peer to peer简单例子-蒲公英云

Glib学习（29） gdbus 的peer to peer简单例子

怼烎@ 2022-12-27 14:00 236阅读 0赞

Peer2Peer模式：这种模式一般称之为点对点的星型结构，Client与Server之间是直接的Peer2Peer的连接，少了DBus Daemon的中转，因此性能较好。

server结构

//创建loop，不运行
pLoop = g_main_loop_new(NULL, FALSE);
//创建skeleton
pSkeleton = rtplay_gdbus_example_skeleton_new();
//获得guid
_guid = g_dbus_generate_guid();
//创建一个新的D-Bus服务器，该服务器侦听有效address中的第一个地址。
_server = g_dbus_server_new_sync("unix:abstract=gdbus_server", G_DBUS_SERVER_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS,
                                     _guid, NULL, NULL, &_error);
//注册new-connection，在客户端链接时被调用
g_signal_connect(_server, "new-connection", G_CALLBACK(on_new_connection), NULL);
//启动server。
g_dbus_server_start(_server);
//运行loop
g_main_loop_run(pLoop);

on_new_connection函数

//获得_iface
_iface = RTPLAY_GDBUS_EXAMPLE_GET_IFACE(pSkeleton);
//注册方法，当客户端调用时会被执行
_iface->handle_my_method1 = My_Method1;
//导出interface，获得connection。
g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(pSkeleton), connection, RTPLAY_GDBUS_EXAMPLE_OBJECT_PATH,
                                 &_error);
//注册closed，在客户端断开时被调用
g_signal_connect(connection, "closed", G_CALLBACK(on_close_connection), user_data);

client结构

//创建loop，不运行
pLoop = g_main_loop_new(NULL, FALSE);
//同步连接并建立D-Bus客户端连接，以与由地址指定的端点交换D-Bus消息。
_pGdbus_connection = g_dbus_connection_new_for_address_sync(
            "unix:abstract=gdbus_server", G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT, NULL, NULL, &_pError);
//创建proxy，链接信号使用
pProxy = rtplay_gdbus_example_proxy_new_sync(_pGdbus_connection, G_DBUS_PROXY_FLAGS_NONE, NULL,
                                                            RTPLAY_GDBUS_EXAMPLE_OBJECT_PATH, NULL, &_pError);
//信号链接
g_signal_connect(pProxy, "my-signal1", G_CALLBACK(My_Signal_1_Handler), NULL);
//运行loop
g_main_loop_run(pLoop);

安装教程

mkdir build
cd build/
cmake ..
make

运行结果

$ ./server/SvrExample 
InitDBusCommunicationServer: Server started.
New thread created: Success
run call in the server.
Emit_My_Signal1() is called.
Emit_My_Signal1() is called.
Emit_My_Signal2() is called.
Emit_My_Signal1() is called.
Emit_My_Signal1() is called.
Emit_My_Signal2() is called.
Emit_My_Signal1() is called.
Emit_My_Signal1() is called.
Emit_My_Signal2() is called.
Emit_My_Signal1() is called.
Emit_My_Signal1() is called.
Emit_My_Signal2() is called.
A new connection [ 0x7f0c24004040 ] was created
Emit_My_Signal1() is called.
Server MyMethod1 call. Parameter: method1 synchronize call..
Server MyMethod1 call. Parameter: method1 asynchronize call..
Server MyMethod2 call. Parameter: in_arg1 = 12 , in_arg2 = 34.
Server MyMethod2 call. Parameter: in_arg1 = 10 , in_arg2 = 21.
Emit_My_Signal1() is called.
Emit_My_Signal2() is called.
Emit_My_Signal1() is called.
Emit_My_Signal2() is called.
Emit_My_Signal1() is called.
Emit_My_Signal1() is called.
Emit_My_Signal1() is called.
Emit_My_Signal2() is called.
The (null) connection [ 0x7f0c24004040 ] was closed!
Emit_My_Signal1() is called.
$ ./example/CltExample 
InitDBusCommunication: Client started.
New thread created: Success
run call in the client.
Signal_1_Callback: String value: Server Signal1(13).
client myMethod_1 call, in_arg = method1 synchronize call. out_arg = Server My_Method1 to output..
client myMethodAsync_1 call, in_arg = method1 asynchronize call..
client MethodCallback_1 call.
Method1Callback: return value: Server My_Method1 to output..
client myMethod_2 call, in_arg1 = 12, in_arg2 = 34, out_arg1 = Server MyMethod2 to output., out_arg2 = 46.
client myMethodAsync_2 call, in_arg1 = 10, in_arg2 = 21.
client MethodCallback_2 call.
Method2Callback: return value: (Server MyMethod2 to output., 31).
Signal_1_Callback: String value: Server Signal1(14).
Signal_2_Callback: Int value: 15, String value: Server Signal2
Signal_1_Callback: String value: Server Signal1(16).
Signal_2_Callback: Int value: 17, String value: Server Signal2
Signal_1_Callback: String value: Server Signal1(18).
Signal_1_Callback: String value: Server Signal1(19).
Signal_1_Callback: String value: Server Signal1(20).
Signal_2_Callback: Int value: 21, String value: Server Signal2