功能：market_subscriber 能够向 market_publisher 请求订阅某些类型的消息，当 market_publisher 有该类型的消息时，需要把它推送给订阅服务。
流程：1. market_publisher 服务启动，监听端口，注册事件处理函数，处理订阅请求消息。
2. market_subscriber 服务启动，监听端口，注册事件处理函数，处理接收推动来的消息。
3. market_subscriber 向 market_publisher 发起订阅请求，market_publisher 根据订阅请求参数，长连接 market_subscriber 提供的消息接收端口。
4. market_publisher 通过长连接向 market_subscriber 推送消息。
注意：1. market_publisher 到 market_subscriber 的长连接的维护：
（1）market_subscriber 一定时间内未收到 market_publisher 的推送消息，尝试重新发起订阅请求。
（2）market_publisher 推送订阅消息时，发现连接断开，尝试重连。 考虑 market_publisher 有重启的情况，收到的订阅请求参数需要做持久化。 ==> TODO：增加一个 market_subscriber 到 market_publisher 的取消订阅的请求。
实现：
1. market_subscriber.thrift — market_subscriber 实现的服务接口
namespace java market_subscriber
namespace perl market_subscriber
namespace php market_subscriber
struct Snapshot
{
1: i32 nSecurityID; ///< 证券ID
2: i32 nTime; ///< 序号/时间/日期 HHMMSSmmm
3: i32 nTradingPhaseCode; ///< 0:开市前 1:开盘集合竞价 2:连续竞价 3:临时停盘 4:收盘集合竞价 5:集中竞价闭市 6:协议转让结束 7:闭市
4: i32 nPreClosePx; ///< 昨收价 * 10000
5: i32 nOpenPx; ///< 开盘价 ..
6: i32 nHighPx; ///< 最高价 ..
7: i32 nLowPx; ///< 最低价 ..
8: i32 nLastPx; ///< 最新价 ..
9: i64 llTradeNum; ///< 成交笔数
10: i64 llVolume; ///< 成交量
11: i64 llValue; ///< 成交额(*10000)
}
service SubscriberService
{
// 推送消息
// Oneway means the client only makes request and does not listen for any response at all. Oneway methods must be void.
oneway void sendSnapshot(1:list<Snapshot> lstSnapshot);
}
2. market_publisher.thrift — market_publisher 实现的服务接口
namespace java market_publisher
namespace perl market_publisher
namespace php market_publisher
struct SubscribeMarketParam
{
1: string user_name;
2: string password;
3: i32 type; // 订阅类型
4: string ip; // 接收推送数据的ip
5: i16 port; // 接收推送数据的port
}
struct SubscribeMarketAck
{
1: required i32 error_code; // 0，成功； 其它，失败
2: optional string error_info;
}
struct GetStockBaseInfoParam
{
1: required i32 stock_code;
}
struct GetStockBaseInfoAck
{
1: required i32 error_code;
2: optional string error_info;
3: optional string stock_name;
}
service PublisherService
{
// 订阅请求：订阅行情信息
SubscribeMarketAck subscribeMarket(1:SubscribeMarketParam param);
GetStockBaseInfoAck getStockBaseInfo(1:GetStockBaseInfoParam param);
}
3. subscriber_server.cpp
* Main.cpp
*/
#include “../gen-cpp/SubscriberService.h”
#include “../gen-cpp/PublisherService.h”
#include <thrift/protocol/TBinaryProtocol.h>
#include <thrift/server/TSimpleServer.h>
#include <thrift/transport/TSocket.h>
#include <thrift/transport/TServerSocket.h>
#include <thrift/transport/TBufferTransports.h>
#include <boost/thread/thread.hpp>
using namespace ::apache::thrift;
using namespace ::apache::thrift::protocol;
using namespace ::apache::thrift::transport;
using namespace ::apache::thrift::server;
using boost::shared_ptr;
using namespace ::market_subscriber;
using namespace ::market_publisher;
class SubscriberServiceHandler : virtual public SubscriberServiceIf {
public:
SubscriberServiceHandler() {
// Your initialization goes here
}
void sendSnapshot(const std::vector<Snapshot> & lstSnapshot) {
// Your implementation goes here
printf(“sendSnapshot/n”);
std::cout << “Received snapshots’ number: ” << lstSnapshot.size() << std::endl;
for (std::vector<Snapshot>::const_iterator iter = lstSnapshot.begin();
iter != lstSnapshot.end(); iter++)
{
std::cout << “nSecurityID: ” << iter->nSecurityID << “/t”;
std::cout << “nTime: ” << iter->nTime << “/t”;
std::cout << std::endl;
}
sleep(10);
}
};
const char* CLIENT_LISTNE_IP = “127.0.0.1”;
const short CLIENT_LISTNE_PORT = 9060;
void subscriberServiceThread()
{
shared_ptr<SubscriberServiceHandler> handler(new SubscriberServiceHandler());
shared_ptr<TProcessor> processor(new SubscriberServiceProcessor(handler));
shared_ptr<TServerTransport> serverTransport(new TServerSocket(CLIENT_LISTNE_PORT));
shared_ptr<TTransportFactory> transportFactory(new TBufferedTransportFactory());
shared_ptr<TProtocolFactory> protocolFactory(new TBinaryProtocolFactory());
TSimpleServer server(processor, serverTransport, transportFactory,
protocolFactory);
server.serve();
}
int main(int argc, char **argv)
{
boost::thread thrd(&subscriberServiceThread);
// wait for subscriberServiceThread ready
sleep(3);
boost::shared_ptr<TSocket> socket(new TSocket(“127.0.0.1”, 9090));
boost::shared_ptr<TTransport> transport(new TBufferedTransport(socket));
boost::shared_ptr<TProtocol> protocol(new TBinaryProtocol(transport));
PublisherServiceClient client(protocol);
try
{
transport->open();
SubscribeMarketAck ack;
SubscribeMarketParam param;
param.__set_user_name(“mazhan”);
param.__set_password(“123456”);
param.__set_type(0);
param.__set_ip(CLIENT_LISTNE_IP);
param.__set_port(CLIENT_LISTNE_PORT);
client.subscribeMarket(ack, param);
std::cout << “subscribeMarket(), error code: ” << ack.error_code << std::endl;
transport->close();
}
catch (TException& tx)
{
std::cout << “ERROR: ” << tx.what() << std::endl;
}
thrd.join();
return 0;
}
4. pubsher_server.cpp
* Main.cpp
*/
#include “../gen-cpp/SubscriberService.h”
#include “../gen-cpp/PublisherService.h”
#include <thrift/protocol/TBinaryProtocol.h>
#include <thrift/server/TSimpleServer.h>
#include <thrift/transport/TSocket.h>
#include <thrift/transport/TServerSocket.h>
#include <thrift/transport/TBufferTransports.h>
#include <thrift/concurrency/ThreadManager.h>
#include <boost/thread/thread.hpp>
using namespace ::apache::thrift;
using namespace ::apache::thrift::protocol;
using namespace ::apache::thrift::transport;
using namespace ::apache::thrift::server;
using namespace ::apache::thrift::concurrency;
using boost::shared_ptr;
using namespace ::market_publisher;
using namespace ::market_subscriber;
std::list<boost::shared_ptr<SubscriberServiceClient> > g_lstSubscriberServiceClient;
boost::mutex g_mutexSubscriberServiceClient;
class PublisherServiceHandler : virtual public PublisherServiceIf {
public:
PublisherServiceHandler() {
// Your initialization goes here
}
void subscribeMarket(SubscribeMarketAck& _return, const SubscribeMarketParam& param) {
// Your implementation goes here
std::cout << “subscribeMarket, ip=” << param.ip << “, port=” << param.port << “.” << std::endl;
boost::shared_ptr<TSocket> socket(new TSocket(param.ip, param.port));
boost::shared_ptr<TTransport> transport(new TBufferedTransport(socket));
boost::shared_ptr<TProtocol> protocol(new TBinaryProtocol(transport));
boost::shared_ptr<SubscriberServiceClient> client(new SubscriberServiceClient(protocol));
int error_code = 1; // fail to open
try
{
transport->open();
error_code = 0;
{ // add to subscribes list
boost::mutex::scoped_lock lock(g_mutexSubscriberServiceClient);
g_lstSubscriberServiceClient.push_back(client);
}
}
catch (TException& e)
{
std::cout << “Exception: ” << e.what() << std::endl;
_return.__set_error_info(e.what());
}
catch (std::exception& e)
{
std::cout << “Exception: ” << e.what() << std::endl;
_return.__set_error_info(e.what());
}
catch (
)
{
char buff[100];
snprintf(buff, 99, “fail to open %s:%d.”, param.ip.c_str(), param.port);
std::cout << “Exception: ” << buff << std::endl;
_return.__set_error_info(buff);
}
_return.__set_error_code(error_code);
}
void getStockBaseInfo(GetStockBaseInfoAck& _return, const GetStockBaseInfoParam& param) {
// Your implementation goes here
printf(“getStockBaseInfo/n”);
}
};
int32_t getCurTime()
{
time_t t = time(0);
char tmp[64];
strftime(tmp, sizeof(tmp), “%H%M%S”, localtime(&t));
return atoi(tmp);
}
// send markets to subscribers.
void publisherServiceThread()
{
while (1)
{
std::vector<Snapshot> lstSnapshot;
Snapshot snapshot;
snapshot.nSecurityID = 100000001;
snapshot.nTime = getCurTime() * 1000 + rand() % 1000;
snapshot.nTradingPhaseCode = 2;
snapshot.nPreClosePx = 240500;
snapshot.nOpenPx = 250500;
snapshot.nHighPx = 250800;
snapshot.nLowPx = 240800;
snapshot.nLastPx = 250300;
snapshot.llTradeNum = 15000;
snapshot.llVolume = 6000000;
snapshot.llValue = 15030000000;
lstSnapshot.push_back(snapshot);
boost::mutex::scoped_lock lock(g_mutexSubscriberServiceClient);
std::list<boost::shared_ptr<SubscriberServiceClient> >::iterator iter = g_lstSubscriberServiceClient.begin();
while (iter != g_lstSubscriberServiceClient.end())
{
try
{
(*iter)->sendSnapshot(lstSnapshot);
iter++;
}
catch (TException& e)
{
std::cout << “Exception: ” << e.what() << std::endl;
iter = g_lstSubscriberServiceClient.erase(iter);
}
catch (std::exception& e)
{
std::cout << “Exception: ” << e.what() << std::endl;
iter = g_lstSubscriberServiceClient.erase(iter);
}
catch (
)
{
std::cout << “Exception: fail to call sendSnapshot().” << std::endl;
iter = g_lstSubscriberServiceClient.erase(iter);
}
}
sleep(3);
}
}
int main(int argc, char **argv)
{
int port = 9090;
shared_ptr<PublisherServiceHandler> handler(new PublisherServiceHandler());
shared_ptr<TProcessor> processor(new PublisherServiceProcessor(handler));
shared_ptr<TServerTransport> serverTransport(new TServerSocket(port));
shared_ptr<TTransportFactory> transportFactory(
new TBufferedTransportFactory());
shared_ptr<TProtocolFactory> protocolFactory(new TBinaryProtocolFactory());
TSimpleServer server(processor, serverTransport, transportFactory,
protocolFactory);
boost::thread thrd(&publisherServiceThread);
printf(“Starting the server
/n”);
server.serve();
printf(“done./n”);
return 0;
}
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/18486.html