xeus-zmq

ZeroMQ-based middleware for xeus

Introduction

xeus-zmq provides various implementations of the xserver API from xeus, based on the ZeroMQ library. These implementations all conform to the Jupyter Kernel Protocol specification.

Installation

xeus-zmq has been packaged on all platforms for the mamba (or conda) package manager.

mamba install xeus-zmq -c conda-forge

Documentation

The documentation can be found with that of xeus at http://xeus-zmq.readthedocs.io/

Usage

xeus-zmq provides server building functions that can be passed to the kernel constructor:

#include <iostream>
#include <memory>

#include "xeus/xkernel.hpp"
#include "xeus/xkernel_configuration.hpp"
#include "xeus-zmq/xzmq_context.hpp"
#include "xeus-zmq/xserver_zmq.hpp"
#include "xmock_interpreter.hpp"

int main(int argc, char* argv[])
{
    std::string file_name = (argc == 1) ? "connection.json" : argv[2];
    xeus::xconfiguration config = xeus::load_configuration(file_name);

    auto context = xeus::make_zmq_context();

    using interpreter_ptr = std::unique_ptr<my_custom_interpreter>;
    interpreter_ptr interpreter = interpreter_ptr(new my_custom_interpreter());
    xeus::xkernel kernel(config,
                         xeus::get_user_name(),
                         std::move(context),
                         std::move(interpreter),
                         xeus::make_xserver_default);
    std::cout << "starting kernel" << std::endl;
    kernel.start();

    return 0;
}

See the documentation for an exhaustive list of the available functions.

Building from sources

xeus-zmq depends on the following libraries: xeus, ZeroMQ, cppzmq, OpenSSL, and nlohmann_json.

xeus-zmq	xeus	ZeroMQ	cppzmq	nlohmann json	OpenSSL
main	^5.0.0	^4.2.5	^4.8.1	^3.11.3	^3.0
3.x	^5.0.0	^4.2.5	^4.8.1	^3.11.3	^3.0

Versions prior to version 3 depend have an additional dependency on xtl.

xeus-zmq	xeus	ZeroMQ	cppzmq	nlohmann json	OpenSSL	xtl
main	^4.0.0	^4.2.5	^4.8.1	^3.11.3	^3.0	>=0.7.0,<0.8.0
2.0.0	^4.0.0	^4.2.5	^4.8.1	^3.11.3	^3.0	>=0.7.0,<0.8.0
1.x	^3.0.0	^4.2.5	^4.8.1	^3.2.0	^3.0	>=0.7.0,<0.8.0

We have packaged all these dependencies on conda-forge. The simplest way to install them is to run:

mamba install cmake pkg-config zeromq cppzmq OpenSSL nlohmann_json=3.11.2 xeus -c conda-forge

Once you have installed the dependencies, you can build and install xeus-zmq:

cmake -D CMAKE_BUILD_TYPE=Release
make
make install

Installing the Dependencies from Source

The dependencies can also be installed from source. Simply clone the directories and run the following cmake (cmake >= 3.8) and make instructions.

xeus

xeus is the core implementation of the Jupyter kernel protocol.

cmake -D CMAKE_BUILD_TYPE=Rlease
make
make install

ZeroMQ

ZeroMQ is the messaging library underlying the Jupyter kernel protocol.

cmake -D WITH_PERF_TOOL=OFF -D ZMQ_BUILD_TESTS=OFF -D ENABLE_CPACK=OFF
-D CMAKE_BUILD_TYPE=Release
make
make install

OpenSSL

OpenSSL is packaged for most package managers (apt-get, rpm, mamba). We recommend making use of an off-the-shelf build of OpenSSL for your system.

For more information on building OpenSSL, check out the official OpenSSL wiki.

cppzmq

cppzmq is a header only library:

cmake -D CMAKE_BUILD_TYPE=Release
make install

json for modern cpp

nlohmann_json is a header only library

cmake
make install

Contributing

See CONTRIBUTING.md to know how to contribute and set up a development environment.

License

We use a shared copyright model that enables all contributors to maintain the copyright on their contributions.

This software is licensed under the BSD-3-Clause license. See the LICENSE file for details.