Qt应用Redis实现消息队列

 

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/liulihuo_gyh/article/details/78425763

类似BS模式，客户端发送任务请求给服务端，服务端将处理结果返回给客户端。 redis负责消息的存储和转发。

仿真病人挂号看病，Patient进程进行挂号，Doctor进程进行看病 ，程序代码如下：

////////////////////////////////////////////Patient////////////////////////////////////////////

Patient.h:

1.  
   #include <QObject>
2.  
    
3.  
   class QRedis;
4.  
    
5.  
   class Patient : public QObject
6.  
   {
7.  
   Q_OBJECT
8.  
    
9.  
   public:
10.  
    Patient(QObject *parent = nullptr);
11.  
    ~Patient();
12.  
     
13.  
    public slots:
14.  
    void pushTask(); //push任务
15.  
     
16.  
    private:
17.  
    void popResult(); //pop结果
18.  
    QRedis * m_redis;
19.  
    };

Patient.cpp

1.  
   #include "patient.h"
2.  
   #include "qredis.h"
3.  
   #include <QTimer>
4.  
   #include <QEventLoop>
5.  
   #include <QThread>
6.  
    
7.  
   static const QString KEYTASK = "MARKTASK";
8.  
   static const QString KEYRESULT = "MARKRESULT";
9.  
    
10.  
    Patient::Patient(QObject *parent)
11.  
    : QObject(parent)
12.  
    {
13.  
    //初始化通道
14.  
    m_redis = new QRedis(this);
15.  
    m_redis->connectHost("127.0.0.1", 6379);
16.  
    m_redis->auth("1234");
17.  
     
18.  
    qDebug() << "client thread id :" << int(QThread::currentThreadId());
19.  
     
20.  
    //轮询任务
21.  
    QTimer * timer = new QTimer(this);
22.  
    connect(timer, &QTimer::timeout, this, &Patient::popResult);
23.  
    timer->start(20);
24.  
     
25.  
    m_redis->del(KEYRESULT);
26.  
    m_redis->del(KEYTASK);
27.  
    pushTask();
28.  
    }
29.  
     
30.  
    Patient::~Patient()
31.  
    {
32.  
    }
33.  
     
34.  
    void Patient::pushTask()
35.  
    {
36.  
    static int i = 0;
37.  
    QString task = QStringLiteral("%1号,姓名:%2,状态:%3").arg(++i).arg(QStringLiteral("病人%1").arg(i)).arg(QStringLiteral("挂号"));
38.  
    qDebug() <<"========================================================\n\n"<< task;
39.  
    qDebug() << "thread id :" << int(QThread::currentThreadId());
40.  
    qint64 ret = m_redis->rpush(KEYTASK, task);
41.  
    }
42.  
     
43.  
    void Patient::popResult()
44.  
    {
45.  
    QString state;
46.  
    QString taskData = m_redis->lpop(KEYRESULT);
47.  
    if (taskData.compare("nil", Qt::CaseInsensitive) == 0 || taskData.isEmpty())
48.  
    {
49.  
    return;
50.  
    }
51.  
    QEventLoop loop;
52.  
    QTimer::singleShot(5000, &loop, &QEventLoop::quit);
53.  
    loop.exec();
54.  
    pushTask();
55.  
    }
56.  
     

main.cpp

1.  
   #include <QtCore/QCoreApplication>
2.  
   #include <QDebug>
3.  
   #include <QThread>
4.  
   #include "patient.h"
5.  
    
6.  
   int main(int argc, char *argv[])
7.  
   {
8.  
   QCoreApplication a(argc, argv);
9.  
    
10.  
    qDebug() << QString("main thread id = : %1").arg(int(QThread::currentThreadId()));
11.  
     
12.  
    QThread patientThread;
13.  
    Patient patient;
14.  
    patient.moveToThread(&patientThread);
15.  
    patientThread.start();
16.  
    return a.exec();
17.  
    }

/////////////////////////////////////////////////Docktor/////////////////////////////////////////////////

Docktor.h

1.  
   #pragma once
2.  
    
3.  
   #include <QObject>
4.  
    
5.  
   class QRedis;
6.  
    
7.  
   class Docktor : public QObject
8.  
   {
9.  
   Q_OBJECT
10.  
     
11.  
    public:
12.  
    Docktor(QObject *parent = nullptr);
13.  
    ~Docktor();
14.  
     
15.  
    public slots:
16.  
    void popTask(); //pop任务
17.  
     
18.  
    private:
19.  
    void pushResult(const QString &task); //push结果
20.  
     
21.  
    QRedis * m_redis;
22.  
    };

Docktor.cpp

1.  
   #include "docktor.h"
2.  
   #include "qredis.h"
3.  
   #include <QTimer>
4.  
   #include <QEventLoop>
5.  
   #include <QThread>
6.  
    
7.  
   static const QString KEYTASK = "MARKTASK";
8.  
   static const QString KEYRESULT = "MARKRESULT";
9.  
    
10.  
    Docktor::Docktor(QObject *parent)
11.  
    : QObject(parent)
12.  
    {
13.  
    //初始化通道
14.  
    m_redis = new QRedis(this);
15.  
    m_redis->connectHost("127.0.0.1", 6379);
16.  
    m_redis->auth("1234");
17.  
     
18.  
    QTimer * timer = new QTimer(this);
19.  
    connect(timer, &QTimer::timeout, this, &Docktor::popTask);
20.  
    timer->start(20);
21.  
    }
22.  
     
23.  
    Docktor::~Docktor()
24.  
    {
25.  
    }
26.  
     
27.  
    void Docktor::popTask()
28.  
    {
29.  
    //获取任务
30.  
    QString taskData = m_redis->lpop(KEYTASK);
31.  
    if (taskData.compare("nil", Qt::CaseInsensitive) == 0 || taskData.isEmpty())
32.  
    {
33.  
    //qDebug() << QString("wait..............................");
34.  
    return;
35.  
    }
36.  
    //处理任务
37.  
    pushResult(taskData);
38.  
    }
39.  
     
40.  
    void Docktor::pushResult(const QString &task)
41.  
    {
42.  
    QStringList taskDatas = task.split(",");
43.  
    QString state = taskDatas.at(2);
44.  
    taskDatas.removeLast();
45.  
    taskDatas.append(QStringLiteral("状态:看病"));
46.  
    //push处理结果
47.  
    qDebug() <<"========================================================\n\n" << taskDatas.join(",");
48.  
    qDebug() << "thread id :" << int(QThread::currentThreadId());
49.  
    qint64 ret = m_redis->rpush(KEYRESULT, taskDatas.join(","));
50.  
    }
51.  
     

main.cpp

1.  
   #include <QtCore/QCoreApplication>
2.  
   #include <QDebug>
3.  
   #include <QThread>
4.  
   #include "docktor.h"
5.  
    
6.  
   int main(int argc, char *argv[])
7.  
   {
8.  
   QCoreApplication a(argc, argv);
9.  
   qDebug() << QString("main thread id = : %1").arg(int(QThread::currentThreadId()));
10.  
     
11.  
    QThread docktorThread;
12.  
    Docktor docktor;
13.  
    docktor.moveToThread(&docktorThread);
14.  
    docktorThread.start();
15.  
    return a.exec();
16.  
    }

/////////////////截图/////////////