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Nacos-sdk-cpp是nacos客戶端的C++版本，它支持服务发现和动态配置
下载工程源代码并且执行下述命令:
cd nacos-sdk-cpp
cmake .
make
将会产生一个libnacos-cli.so 和一个 nacos-cli.out
运行 ./nacos-cli.out 以执行客户端的所有testcase
运行 make install 将libnacos-cli安装到lib目录
注意: 你需要在本机运行一个nacos server，监听8848端口以完成所有测试 其中有个测试将会测试端点（endpoint）功能，所以你还需要在本机运行一个http服务器，在路径/endpoints/endpoint0提供下述内容：
127.0.0.1:8848
这些例子你都能在nacos-sdk-cpp/examples/找到
下面的例子说明了如何将库文件(.so) 集成到你的工程:
IntegratingIntoYourProject.cpp:
#include <iostream>
#include "factory/NacosServiceFactory.h"
#include "PropertyKeyConst.h"
#include "DebugAssertion.h"
#include "ResourceGuard.h"
#include "NacosString.h"
using namespace std;
using namespace nacos;
int main() {
Properties props;
props[PropertyKeyConst::SERVER_ADDR] = "127.0.0.1:8848";//Server address
NacosServiceFactory *factory = new NacosServiceFactory(props);
ResourceGuard <NacosServiceFactory> _guardFactory(factory);
ConfigService *n = factory->CreateConfigService();
ResourceGuard <ConfigService> _serviceFactory(n);
NacosString ss = "";
try {
ss = n->getConfig("k", NULLSTR, 1000);
}
catch (NacosException &e) {
cout <<
"Request failed with curl code:" << e.errorcode() << endl <<
"Reason:" << e.what() << endl;
return -1;
}
cout << ss << endl;
return 0;
}
g++ IntegratingIntoYourProject.cpp -L. -lnacos-cli -Iinclude -o integrated.out
在本机的8848端口启动一个nacos server, 并且运行 ./integrated.out
你将会看到:
SuccessfullyIntegrated
你可能会遇到下述问题:
error while loading shared libraries: libnacos-cli.so: cannot open shared object file: No such file or directory
解决方法:
假设你的 libnacos-cli.so 在如下目录 /usr/local/libnacos/
export LD_LIBRARY_PATH=/usr/local/libnacos/ (请勿包含lib文件的名字)
你也可以通过ldconfig将库配置到libpath当中
getConfig.cpp:
#include <iostream>
#include "factory/NacosServiceFactory.h"
#include "constant/PropertyKeyConst.h"
#include "ResourceGuard.h"
using namespace std;
using namespace nacos;
int main() {
Properties props;
props[PropertyKeyConst::SERVER_ADDR] = "127.0.0.1:8848";//Server address
NacosServiceFactory *factory = new NacosServiceFactory(props);
ResourceGuard <NacosServiceFactory> _guardFactory(factory);
ConfigService *n = factory->CreateConfigService();
ResourceGuard <ConfigService> _serviceFactory(n);
NacosString ss = "";
try {
ss = n->getConfig("k", NULLSTR, 1000);
}
catch (NacosException &e) {
cout <<
"Request failed with curl code:" << e.errorcode() << endl <<
"Reason:" << e.what() << endl;
return -1;
}
cout << ss << endl;
return 0;
}
setConfig.cpp:
#include <iostream>
#include "factory/NacosServiceFactory.h"
#include "ResourceGuard.h"
#include "constant/PropertyKeyConst.h"
using namespace std;
using namespace nacos;
int main() {
Properties props;
props[PropertyKeyConst::SERVER_ADDR] = "127.0.0.1:8848";//server address
NacosServiceFactory *factory = new NacosServiceFactory(props);
ResourceGuard <NacosServiceFactory> _guardFactory(factory);
ConfigService *n = factory->CreateConfigService();
ResourceGuard <ConfigService> _serviceFactory(n);
bool bSucc = false;
NacosString ss = "";
try {
bSucc = n->publishConfig("Cfg_key", NULLSTR, "Cfg_val");
int retry = 0;
ss = n->getConfig("Cfg_key", NULLSTR, 1000);
while (!(ss == "Cfg_val") && retry++ < 10) {
ss = n->getConfig("Cfg_key", NULLSTR, 1000);
}
if (!(ss == "Cfg_val")) {
throw NacosException(0, "getConfig() failed.");
}
}
catch (NacosException &e) {
cout <<
"Request failed with curl code:" << e.errorcode() << endl <<
"Reason:" << e.what() << endl;
return -1;
}
cout << "Publishing Key:Cfg_key with value:Cfg_val result:" << bSucc << endl;
return 0;
}
listenToKeys.cpp:
#include <iostream>
#include "factory/NacosServiceFactory.h"
#include "ResourceGuard.h"
#include "listen/Listener.h"
#include "constant/PropertyKeyConst.h"
using namespace std;
using namespace nacos;
class MyListener : public Listener {
private:
int num;
public:
MyListener(int num) {
this->num = num;
}
void receiveConfigInfo(const NacosString &configInfo) {
cout << "===================================" << endl;
cout << "Watcher" << num << endl;
cout << "Watched Key UPDATED:" << configInfo << endl;
cout << "===================================" << endl;
}
};
int main() {
Properties props;
props[PropertyKeyConst::SERVER_ADDR] = "127.0.0.1:8848";
NacosServiceFactory *factory = new NacosServiceFactory(props);
ResourceGuard <NacosServiceFactory> _guardFactory(factory);
ConfigService *n = factory->CreateConfigService();
ResourceGuard <ConfigService> _serviceFactory(n);
MyListener *theListener = new MyListener(1);//You don't need to free it, since it will be deleted by the function removeListener
n->addListener("dqid", NULLSTR, theListener);//All changes on the key dqid will be received by MyListener
cout << "Input a character to continue" << endl;
getchar();
cout << "remove listener" << endl;
n->removeListener("dqid", NULLSTR, theListener);//Cancel listening
getchar();
return 0;
}
registerInstances.cpp:
#include <iostream>
#include <unistd.h>
#include "factory/NacosServiceFactory.h"
#include "ResourceGuard.h"
#include "naming/Instance.h"
#include "NacosString.h"
#include "Properties.h"
#include "constant/PropertyKeyConst.h"
using namespace std;
using namespace nacos;
int main() {
Properties configProps;
configProps[PropertyKeyConst::SERVER_ADDR] = "127.0.0.1";
NacosServiceFactory *factory = new NacosServiceFactory(configProps);
ResourceGuard <NacosServiceFactory> _guardFactory(factory);
NamingService *namingSvc = factory->CreateNamingService();
ResourceGuard <NamingService> _serviceFactory(namingSvc);
Instance instance;
instance.clusterName = "DefaultCluster";
instance.ip = "127.0.0.1";
instance.port = 2333;
instance.instanceId = "1";
instance.ephemeral = true;
//Registers 5 services named TestNamingService1...5
try {
for (int i = 0; i < 5; i++) {
NacosString serviceName = "TestNamingService" + NacosStringOps::valueOf(i);
instance.port = 2000 + i;
namingSvc->registerInstance(serviceName, instance);
}
}
catch (NacosException &e) {
cout << "encounter exception while registering service instance, raison:" << e.what() << endl;
return -1;
}
sleep(30);
try {
for (int i = 0; i < 5; i++) {
NacosString serviceName = "TestNamingService" + NacosStringOps::valueOf(i);
namingSvc->deregisterInstance(serviceName, "127.0.0.1", 2000 + i);
sleep(1);
}
}
catch (NacosException &e) {
cout << "encounter exception while registering service instance, raison:" << e.what() << endl;
return -1;
}
sleep(30);
return 0;
}
subscribeServices.cpp:
#include <iostream>
#include "factory/NacosServiceFactory.h"
#include "ResourceGuard.h"
#include "naming/subscribe/EventListener.h"
#include "constant/PropertyKeyConst.h"
using namespace std;
using namespace nacos;
class MyServiceListener : public EventListener {
private:
int num;
public:
MyServiceListener(int num) {
this->num = num;
}
void receiveNamingInfo(const ServiceInfo &serviceInfo){
cout << "===================================" << endl;
cout << "Watcher: " << num << endl;
cout << "Watched service UPDATED: " << serviceInfo.toInstanceString() << endl;
cout << "===================================" << endl;
}
};
int main() {
Properties props;
props[PropertyKeyConst::SERVER_ADDR] = "127.0.0.1:8848";
//Interval for poller to check the status of subscribed services(unit:Ms), 30000 by default
//Here we set it to 5000 to see the output more quick
props[PropertyKeyConst::SUBSCRIPTION_POLL_INTERVAL] = "5000";
NacosServiceFactory *factory = new NacosServiceFactory(props);
ResourceGuard <NacosServiceFactory> _guardFactory(factory);
NamingService *n = factory->CreateNamingService();
ResourceGuard <NamingService> _serviceFactory(n);
n->subscribe("ss", new MyServiceListener(1));
cout << "Press any key to register services" << endl;
getchar();
n->registerInstance("ss", "127.0.0.1", 33);
n->registerInstance("ss", "127.0.0.1", 34);
cout << "Press any key to deregister services" << endl;
getchar();
n->deregisterInstance("ss", "127.0.0.1", 33);
n->deregisterInstance("ss", "127.0.0.1", 34);
cout << "All instances Unregistered, press any key to finish testing" << endl;
getchar();
return 0;
}
getAllInstances.cpp:
#include <iostream>
#include <list>
#include "factory/NacosServiceFactory.h"
#include "naming/Instance.h"
#include "NacosString.h"
#include "Properties.h"
#include "constant/PropertyKeyConst.h"
#include "ResourceGuard.h"
using namespace std;
using namespace nacos;
int main() {
Properties configProps;
configProps[PropertyKeyConst::SERVER_ADDR] = "127.0.0.1";
NacosServiceFactory *factory = new NacosServiceFactory(configProps);
ResourceGuard <NacosServiceFactory> _guardFactory(factory);
NamingService *namingSvc = factory->CreateNamingService();
ResourceGuard <NamingService> _guardService(namingSvc);
list <Instance> instances = namingSvc->getAllInstances("TestNamingService1");
cout << "getAllInstances from server:" << endl;
for (list<Instance>::iterator it = instances.begin();
it != instances.end(); it++) {
cout << "Instance:" << it->toString() << endl;
}
return 0;
}
如果你的服务器启设置了密码，在上述任意一个例子当中加入下述配置，即可启用用户名密码认证：
using namespace nacos;
......
configProps[PropertyKeyConst::SERVER_ADDR] = "127.0.0.1";
configProps[PropertyKeyConst::AUTH_USERNAME] = "username";
configProps[PropertyKeyConst::AUTH_PASSWORD] = "password";
NacosServiceFactory *factory = new NacosServiceFactory(configProps);
ConfigService *n = factory->CreateConfigService();
NamingService *namingSvc = factory->CreateNamingService();
......
| 操作系统/环境 | 编译器 | 测试版本 |
|---|---|---|
| MacOS Darwin 19.6.0 x86_64 | Clang | Apple clang version 12.0.0 (clang-1200.0.26.2) |
| Windows 10 WSL | GCC | version 4.8.4 |
| Windows 10 CYGWIN_NT-10.0 x86_64 | GCC | version 10.2.0 (GCC) |
| Ubuntu1~16.04.12 | GCC | version 5.4.0 |
| CentOS | GCC | |
| Windows | Visual C++ | 计划中 |
Nacos (官方网站: http://nacos.io) 是一个易用的动态服务发现、配置管理以及服务管理平台。它将助力您轻松建立云上原生应用和微服务。
在Nacos中，服务是一级公民. Nacos 支持几乎所有种类的服务，例如：
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