Qt应用Redis实现消息队列

 

 

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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:

#include <QObject>

class QRedis;

class Patient : public QObject
{
Q_OBJECT

public:
Patient(QObject *parent = nullptr);
~Patient();

public slots:
void pushTask(); //push任务

private:
void popResult(); //pop结果
QRedis * m_redis;
};

Patient.cpp

#include "patient.h"
#include "qredis.h"
#include <QTimer>
#include <QEventLoop>
#include <QThread>

static const QString KEYTASK = "MARKTASK";
static const QString KEYRESULT = "MARKRESULT";

Patient::Patient(QObject *parent)
: QObject(parent)
{
//初始化通道
m_redis = new QRedis(this);
m_redis->connectHost( "127.0.0.1", 6379);
m_redis->auth( "1234");

qDebug() << "client thread id :" << int(QThread::currentThreadId());

//轮询任务
QTimer * timer = new QTimer(this);
connect(timer, &QTimer::timeout, this, &Patient::popResult);
timer->start( 20);

m_redis->del(KEYRESULT);
m_redis->del(KEYTASK);
pushTask();
}

Patient::~Patient()
{
}

void Patient::pushTask()
{
static int i = 0;
QString task = QStringLiteral( "%1号,姓名:%2,状态:%3").arg(++i).arg(QStringLiteral("病人%1").arg(i)).arg(QStringLiteral("挂号"));
qDebug() << "========================================================\n\n"<< task;
qDebug() << "thread id :" << int(QThread::currentThreadId());
qint64 ret = m_redis->rpush(KEYTASK, task);
}

void Patient::popResult()
{
QString state;
QString taskData = m_redis->lpop(KEYRESULT);
if (taskData.compare("nil", Qt::CaseInsensitive) == 0 || taskData.isEmpty())
{
return;
}
QEventLoop loop;
QTimer::singleShot( 5000, &loop, &QEventLoop::quit);
loop.exec();
pushTask();
}

main.cpp

#include <QtCore/QCoreApplication>
#include <QDebug>
#include <QThread>
#include "patient.h"

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

qDebug() << QString( "main thread id = : %1").arg(int(QThread::currentThreadId()));

QThread patientThread;
Patient patient;
patient.moveToThread(&patientThread);
patientThread.start();
return a.exec();
}

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

Docktor.h

#pragma once

#include <QObject>

class QRedis;

class Docktor : public QObject
{
Q_OBJECT

public:
Docktor(QObject *parent = nullptr);
~Docktor();

public slots:
void popTask(); //pop任务

private:
void pushResult(const QString &task); //push结果

QRedis * m_redis;
};

Docktor.cpp

#include "docktor.h"
#include "qredis.h"
#include <QTimer>
#include <QEventLoop>
#include <QThread>

static const QString KEYTASK = "MARKTASK";
static const QString KEYRESULT = "MARKRESULT";

Docktor::Docktor(QObject *parent)
: QObject(parent)
{
//初始化通道
m_redis = new QRedis(this);
m_redis->connectHost( "127.0.0.1", 6379);
m_redis->auth( "1234");

QTimer * timer = new QTimer(this);
connect(timer, &QTimer::timeout, this, &Docktor::popTask);
timer->start( 20);
}

Docktor::~Docktor()
{
}

void Docktor::popTask()
{
//获取任务
QString taskData = m_redis->lpop(KEYTASK);
if (taskData.compare("nil", Qt::CaseInsensitive) == 0 || taskData.isEmpty())
{
//qDebug() << QString("wait..............................");
return;
}
//处理任务
pushResult(taskData);
}

void Docktor::pushResult(const QString &task)
{
QStringList taskDatas = task.split( ",");
QString state = taskDatas.at( 2);
taskDatas.removeLast();
taskDatas.append(QStringLiteral( "状态:看病"));
//push处理结果
qDebug() << "========================================================\n\n" << taskDatas.join(",");
qDebug() << "thread id :" << int(QThread::currentThreadId());
qint64 ret = m_redis->rpush(KEYRESULT, taskDatas.join( ","));
}

main.cpp

#include <QtCore/QCoreApplication>
#include <QDebug>
#include <QThread>
#include "docktor.h"

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
qDebug() << QString( "main thread id = : %1").arg(int(QThread::currentThreadId()));

QThread docktorThread;
Docktor docktor;
docktor.moveToThread(&docktorThread);
docktorThread.start();
return a.exec();
}

/////////////////截图/////////////