uvweb

Http, WebSocket code based on libuv, uvw (libuv C++ binding) and http_parser.

Pulsar client

Publisher

#include <uvweb/PulsarClient.h>
#include <uvw.hpp>
#include <iostream>

int main()
{
    std::string url("ws://localhost:8080");

    // A queue is used to hold published messages until they are delivered.
    // Its size is bounded so programs do not run out of memory
    size_t maxQueueSize = 1000;

    uvweb::PulsarClient pulsarClient(url, maxQueueSize);

    std::string message("hello world");
    std::string tenant("public");
    std::string namespace("default");
    std::string topic("topic_name");

    pulsarClient.publish(
        message,
        tenant,
        nameSpace,
        topic,
        [](bool success, const std::string& context, const std::string& messageId) {
            std::string successString = (success) ? "true" : "false";
            std::cout << "Publish successful: " << successString 
                      << " context " << context
                      << " message id: " << messageId << std::endl;
        });

    auto loop = uvw::Loop::getDefault();
    loop->run();

    return 0;
}

Consumer

#include <uvweb/PulsarClient.h>
#include <uvw.hpp>
#include <iostream>

int main()
{
    std::string url("ws://localhost:8080");
    size_t maxQueueSize = 1000;

    uvweb::PulsarClient pulsarClient(url, maxQueueSize);

    std::string tenant("public");
    std::string namespace("default");
    std::string topic("topic_name");
    std::string subscription("subscription_name");

    pulsarClient.subscribe(
        tenant,
        nameSpace,
        topic,
        subscription,
        [](const std::string& msg, const std::string& messageId) -> bool {
            std::cout << "Got message " << msg
                      << " message id: " << messageId << std::endl;
            //
            // returning true informs the client to send an acknowledge
            // to tell the Pulsar Client that a message has been properly consumed
            //
            return true;
        });

    return 0;
}

Building

The project is CMake based, and all dependencies are fetched and build on the fly thanks to CMake FetchContent.

mkdir build
cd build
cmake ..
make

Dependant unittest will be run, to build faster add those cmake options.

cmake \
    -DCXXOPTS_BUILD_EXAMPLES=OFF \
    -DBUILD_TESTING=OFF \
    -DLIBUV_BUILD_TESTS=OFF