采用C++的ACE库实现的一个通用的C/S架构通信程序(最终版)

ACE自适配通信环境（ADAPTIVE Communication Environment）是可以自由使用、开放源码的面向对象（OO）框架（Framework），在其中实现了许多用于并发通信软件的核心模式。ACE提供了一组丰富的可复用C++ Wrapper Facade（包装外观）和框架组件，可跨越多种平台完成通用的通信软件任务，其中包括：事件多路分离和事件处理器分派、信号处理、服务初始化、进程间通信、共享内存管理、消息路由、分布式服务动态（重）配置、并发执行和同步，等等。ACE的目标用户是高性能和实时通信服务和应用的开发者。它简化了使用进程间通信、事件多路分离、显式动态链接和并发的OO网络应用和服务的开发。此外，通过服务在运行时与应用的动态链接，ACE还使系统的配置和重配置得以自动化。

我最近采用ACE实现了一个通用的C/S架构通信程序，具体实现简述如下：

1． 服务器端：一个采用领导者/跟随者模型的线程池不断地接受从多个客户端发来的消息，并放入一个消息队列，然后又有一个采用半同步/半异步模型的线程池不断地从这个消息队列中取出消息进行处理。服务器端代码如下：（共10个文件）

ACE_Server.cpp#include "ace/SOCK_Acceptor.h"#include "ace/Acceptor.h"#include "ace/Thread_Manager.h"#include "ace/TP_Reactor.h"#include "ace/Reactor.h"#include "ace/INET_Addr.h"#include "ace/OS.h"#include "Request_Handler.h"#include "Server.h"#include "Constants.h"using namespace ACE_Server;int main(int argc, char *argv[]){ACE_TP_Reactor tp_reactor;ACE_Reactor reactor(&tp_reactor, 1);ACE_Reactor::instance(&reactor, 1);ACE_Acceptor<Request_Handler, ACE_SOCK_ACCEPTOR> acceptor;ACE_INET_Addr addr(SERVER_PORT_NUM);if(acceptor.open(addr) == -1)return -1;Server server_tp;server_tp.activate(THR_NEW_LWP | THR_JOINABLE, SERVER_THREAD_POOL_SIZE);ACE_Thread_Manager::instance()->wait();return 0;}Constants.h#ifndef __CONSTANTS_H_#define __CONSTANTS_H_namespace ACE_Server{static const size_t SERVER_THREAD_POOL_SIZE = 5; //进行数据接收的线程池大小static const size_t TASK_THREAD_POOL_SIZE = 5; //进行数据处理的线程池大小static const size_t BUFFER_SIZE = 4096; //数据缓冲区大小static const size_t SERVER_PORT_NUM = 10101; //服务器的通信端口号}#endifServer.h#ifndef __SERVER_H_#define __SERVER_H_#include "ace/Task.h"namespace ACE_Server{class Server: public ACE_Task_Base{public:virtual int svc(void);};}#endifServer.cpp#include "ace/Reactor.h"#include "Server.h"namespace ACE_Server{int Server::svc(void){int result = ACE_Reactor::instance()->run_reactor_event_loop();if(result == -1)return -1;return 0;}}Request_Handler.h#ifndef __REQUEST_HANDLER_H_#define __REQUEST_HANDLER_H_#include "ace/Svc_Handler.h"#include "ace/SOCK_Stream.h"#include "ace/Synch.h"#include "ace/Thread_Manager.h"#include "Task_Manager.h"namespace ACE_Server{class Request_Handler: public ACE_Svc_Handler<ACE_SOCK_STREAM, ACE_MT_SYNCH>{public:Request_Handler(ACE_Thread_Manager *thr_mgr = 0);protected:virtual int handle_input(ACE_HANDLE fd = ACE_INVALID_HANDLE);private:static Task_Manager task_mgr;};}#endifRequest_Handler.cpp#include "ace/OS.h"#include "ace/Message_Block.h"#include "ace/Thread_Manager.h"#include "ace/Svc_Handler.h"#include "ace/SOCK_Stream.h"#include "ace/Synch.h"#include "ace/Reactor.h"#include "Request_Handler.h"#include "Task_Manager.h"#include "Constants.h"namespace ACE_Server{Task_Manager Request_Handler::task_mgr;Request_Handler::Request_Handler(ACE_Thread_Manager *thr_mgr): ACE_Svc_Handler<ACE_SOCK_STREAM, ACE_MT_SYNCH> (thr_mgr){this->reactor(ACE_Reactor::instance());task_mgr.activate();}int Request_Handler::handle_input(ACE_HANDLE fd){char length[4] = {0};if(this->peer().recv_n(length, 4) == 4){size_t msg_len = 0;for(int i = 0; i < 4; i++){msg_len |= (size_t)length[i] << (8 * i);}char msg[BUFFER_SIZE] = {0};if(this->peer().recv_n(msg, msg_len) == msg_len){ACE_Message_Block *mb = NULL;ACE_NEW_RETURN(mb, ACE_Message_Block(msg_len, ACE_Message_Block::MB_DATA, 0, msg), -1);mb->wr_ptr(msg_len);task_mgr.putq(mb);return 0;}}return -1;}}Task_Manager.h#ifndef __TASK_MANAGER_H_#define __TASK_MANAGER_H_#include "ace/Task.h"#include "ace/Synch.h"namespace ACE_Server{class Task_Manager: public ACE_Task<ACE_MT_SYNCH>{public:virtual int svc(void);};}#endifTask_Manager.cpp#include "ace/Message_Block.h"#include "Task_Manager.h"#include "Task_Worker.h"#include "Constants.h"namespace ACE_Server{int Task_Manager::svc(void){Task_Worker task_tp;task_tp.activate(THR_NEW_LWP | THR_JOINABLE, TASK_THREAD_POOL_SIZE);while(1){ACE_Message_Block *mb = NULL;if(this->getq(mb) < 0){task_tp.msg_queue()->deactivate();task_tp.wait();}task_tp.putq(mb);}return 0;}}Task_Worker.h#ifndef __TASK_WORKER_H_#define __TASK_WORKER_H_#include "ace/Task.h"#include "ace/Synch.h"#include "ace/Message_Block.h"namespace ACE_Server{class Task_Worker: public ACE_Task<ACE_MT_SYNCH>{public:virtual int svc(void);private:void process_task(ACE_Message_Block *mb);};}#endifTask_Worker.cpp#include "ace/OS.h"#include "ace/Message_Block.h"#include "Task_Worker.h"namespace ACE_Server{int Task_Worker::svc(void){while(1){ACE_Message_Block *mb = NULL;if(this->getq(mb) == -1){continue;}process_task(mb);}return 0;}void Task_Worker::process_task(ACE_Message_Block *mb){//进行数据处理,数据的起始地址为mb->rd_ptr(),长度为mb->length()ACE_DEBUG((LM_DEBUG, ACE_TEXT("(%t) Processing task: %s length %d\n"), mb->rd_ptr(), mb->length()));ACE_OS::sleep(3); //模拟数据处理过程mb->release();}}

2． 客户端：应用程序将需要发送的若干消息放入一个消息队列，然后激活一个线程来发送所有消息到服务器端。

客户端代码如下：（共4个文件）

ACE_Client.cpp#include "Client.h"using namespace ACE_Client;int main(int argc, char *argv[]){Client client("localhost"); //服务器的IP地址或者服务器名称for(int i = 0; i < 5; i++){char *task1 = "Is it a good day?"; //第1个task的数据size_t task1_len = 18; //第1个task的数据长度char *task1_t; //无需修改ACE_NEW_RETURN(task1_t, char[task1_len + 4], -1); //无需修改client.put_task(task1_t, task1, task1_len); //无需修改char *task2 = "Yeah, it really is."; //第2个task的数据size_t task2_len = 20; //第2个task的数据长度char *task2_t; //无需修改ACE_NEW_RETURN(task2_t, char[task2_len + 4], -1); //无需修改client.put_task(task2_t, task2, task2_len); //无需修改client.send_tasks(); //将上面的task全部发到服务器delete [] task1_t; //释放task1的内存delete [] task2_t; //释放task2的内存}return 0;}Constants.h#ifndef __CONSTANTS_H_#define __CONSTANTS_H_#include "ace/Time_Value.h"namespace ACE_Client{static const size_t BUFFER_SIZE = 4096; //数据缓冲区大小static const size_t SERVER_PORT_NUM = 10101; //服务器的通信端口号static const ACE_Time_Value TIME_INTERVAL(0, 1000000); //两次数据发送之间的时间间隔(0 s + 1000000 us = 1 s)}#endifClient.h#ifndef __CLIENT_H_#define __CLIENT_H_#include "ace/Task.h"#include "ace/INET_Addr.h"#include "ace/Synch.h"namespace ACE_Client{class Client: public ACE_Task<ACE_NULL_SYNCH>{public:Client(char *server);virtual int svc(void);char *put_task(char *msg_t, char *msg_s, size_t msg_len);void send_tasks(void);private:ACE_INET_Addr addr;};}#endifClient.cpp#include "ace/OS.h"#include "ace/SOCK_Stream.h"#include "ace/SOCK_Connector.h"#include "ace/Message_Block.h"#include "ace/Thread_Manager.h"#include "ace/INET_Addr.h"#include "Constants.h"#include "Client.h"namespace ACE_Client{Client::Client(char *server){addr = ACE_INET_Addr(SERVER_PORT_NUM, server);}int Client::svc(void){ACE_SOCK_Stream stream;ACE_SOCK_Connector connector;if(connector.connect(stream, addr) < 0){return -1;}else{while(1){ACE_Message_Block *mb = NULL;if(this->getq(mb) == -1){break;}ACE_DEBUG((LM_DEBUG, ACE_TEXT("(%t) Sending %s\n"), &(mb->rd_ptr()[4])));stream.send_n(mb->rd_ptr(), mb->length());mb->release();ACE_OS::sleep(TIME_INTERVAL);}}stream.close();return 0;}char *Client::put_task(char *msg_t, char *msg_s, size_t msg_len){for(int i = 0; i < 4; i++){msg_t[i] = (char)((msg_len >> (8 * i)) & 0xff);}ACE_OS::memcpy(&msg_t[4], msg_s, msg_len);ACE_Message_Block *mb = NULL;ACE_NEW_RETURN(mb, ACE_Message_Block(msg_len + 4, ACE_Message_Block::MB_DATA, 0, msg_t), 0);mb->wr_ptr(msg_len + 4);this->putq(mb);return msg_t;}void Client::send_tasks(void){this->activate();ACE_Thread_Manager::instance()->wait();}}

全部完毕，希望大家能够喜欢

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