QRemoteObjectNode::remoteObjectAdded 信号不触发
QRemoteObjectNode::remoteObjectAdded signal does not fire
在学习如何使用 QtRO 技术预览模块时,我尝试了一个简单的 3 节点网络(注册节点、源对象远程处理节点和客户端节点)。
注册表节点 main.cpp:
#include <QCoreApplication>
#include <QRemoteObjectRegistryHost>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QRemoteObjectRegistryHost host(QUrl("tcp://127.0.0.1:5557"));
return a.exec();
}
源节点main.cpp:
#include <QCoreApplication>
#include <QRemoteObjectHost>
#include <QTimer>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QTimer timer;
timer.start(10000);
QRemoteObjectHost host;
if(!host.setHostUrl(QUrl("tcp://127.0.0.1:5556"))) qDebug() << "Host url " << host.lastError();
if(!host.setRegistryUrl(QUrl("tcp://127.0.0.1:5557"))) qDebug() << "Reg url " << host.lastError();
if(!host.enableRemoting(&timer, "HostTimer")) qDebug() << "Remoting error " << host.lastError();
return a.exec();
}
客户端节点main.cpp:
#include <QCoreApplication>
#include <QRemoteObjectNode>
#include <QTimer>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QRemoteObjectNode node(QUrl("tcp://127.0.0.1:5557"));
QObject::connect(&node, &QRemoteObjectNode::remoteObjectAdded,
[](const QRemoteObjectSourceLocation& info){
qDebug() << "New source added : " << info;
});
qDebug() << "Waiting for registry ";
node.waitForRegistry(10000);
qDebug() << "Already here sources : " << node.registry()->sourceLocations();
QTimer timer;
timer.start(5000);
QObject::connect(&timer, &QTimer::timeout,
[&](){
qDebug() << "New sources list : " << node.registry()->sourceLocations();
});
return a.exec();
}
我首先启动注册表节点,然后是客户端节点,最后是源节点,我希望通过这个启动顺序启动 remoteObjectAdded,但它没有。
非常感谢您的帮助。
我回答我的问题。
我在连接方法调用中使用了错误的信号源。
客户端节点将是:
#include <QCoreApplication>
#include <QRemoteObjectNode>
#include <QTimer>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QRemoteObjectNode node(QUrl("tcp://127.0.0.1:5557"));
QObject::connect(node.registry(), &QRemoteObjectRegistry::remoteObjectAdded,
[](const QRemoteObjectSourceLocation& info){
qDebug() << "New source added : " << info;
});
qDebug() << "Waiting for registry ";
node.waitForRegistry(10000);
qDebug() << "Already here sources : " << node.registry()->sourceLocations();
QTimer timer;
timer.start(5000);
QObject::connect(&timer, &QTimer::timeout,
[&](){
qDebug() << "New sources list : " << node.registry()->sourceLocations();
});
return a.exec();
}
触发信号的是注册中心而不是节点,在所有源节点都连接到注册中心后听起来很合乎逻辑,因此它会触发 remoteObjectAdded 信号。
在学习如何使用 QtRO 技术预览模块时,我尝试了一个简单的 3 节点网络(注册节点、源对象远程处理节点和客户端节点)。
注册表节点 main.cpp:
#include <QCoreApplication>
#include <QRemoteObjectRegistryHost>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QRemoteObjectRegistryHost host(QUrl("tcp://127.0.0.1:5557"));
return a.exec();
}
源节点main.cpp:
#include <QCoreApplication>
#include <QRemoteObjectHost>
#include <QTimer>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QTimer timer;
timer.start(10000);
QRemoteObjectHost host;
if(!host.setHostUrl(QUrl("tcp://127.0.0.1:5556"))) qDebug() << "Host url " << host.lastError();
if(!host.setRegistryUrl(QUrl("tcp://127.0.0.1:5557"))) qDebug() << "Reg url " << host.lastError();
if(!host.enableRemoting(&timer, "HostTimer")) qDebug() << "Remoting error " << host.lastError();
return a.exec();
}
客户端节点main.cpp:
#include <QCoreApplication>
#include <QRemoteObjectNode>
#include <QTimer>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QRemoteObjectNode node(QUrl("tcp://127.0.0.1:5557"));
QObject::connect(&node, &QRemoteObjectNode::remoteObjectAdded,
[](const QRemoteObjectSourceLocation& info){
qDebug() << "New source added : " << info;
});
qDebug() << "Waiting for registry ";
node.waitForRegistry(10000);
qDebug() << "Already here sources : " << node.registry()->sourceLocations();
QTimer timer;
timer.start(5000);
QObject::connect(&timer, &QTimer::timeout,
[&](){
qDebug() << "New sources list : " << node.registry()->sourceLocations();
});
return a.exec();
}
我首先启动注册表节点,然后是客户端节点,最后是源节点,我希望通过这个启动顺序启动 remoteObjectAdded,但它没有。
非常感谢您的帮助。
我回答我的问题。
我在连接方法调用中使用了错误的信号源。
客户端节点将是:
#include <QCoreApplication>
#include <QRemoteObjectNode>
#include <QTimer>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QRemoteObjectNode node(QUrl("tcp://127.0.0.1:5557"));
QObject::connect(node.registry(), &QRemoteObjectRegistry::remoteObjectAdded,
[](const QRemoteObjectSourceLocation& info){
qDebug() << "New source added : " << info;
});
qDebug() << "Waiting for registry ";
node.waitForRegistry(10000);
qDebug() << "Already here sources : " << node.registry()->sourceLocations();
QTimer timer;
timer.start(5000);
QObject::connect(&timer, &QTimer::timeout,
[&](){
qDebug() << "New sources list : " << node.registry()->sourceLocations();
});
return a.exec();
}
触发信号的是注册中心而不是节点,在所有源节点都连接到注册中心后听起来很合乎逻辑,因此它会触发 remoteObjectAdded 信号。