Taager’s Foray in Messaging Part 2; Installing the Pulsar Node.js client on macOS

See if python is installed via the macOS installer. Run which python3 . If it returns a value similar to /Library/Frameworks/Python.framework/Versions/3.xx/bin/python3 , we can skip the next step.

Install Python3 via the macOS installer. The version installed via brew does not seem to work correctly, probably because of the different locations of python installations.

Install dependencies

brew install openssl cmake 
export OPENSSL_INCLUDE_DIR=/usr/local/opt/openssl/include/
export OPENSSL_ROOT_DIR=/usr/local/opt/openssl/
brew install protobuf boost boost-python3 log4cxx

Install Google Test

git clone https://github.com/google/googletest.git 
cd googletest 
cmake . 
make install

• The third step cmake . , can possibly fail due to Could not find Boost Python Library . If that happens, we can manually modify the CMakeLists.txt file from find_package(PythonLibs REQUIRED)to find_package(PythonLibs 3 REQUIRED)
• If we encounter the error Could NOT find PythonLibs: Found unsuitable version "X.X.X", but required is at least "3" , we can manually update CMake to use the specific python version (from the macOS installer in the first step). Modifying cmake command to run like this (don’t forget the last period) should work cmake -DPYTHON_INCLUDE_DIR=${PYTHON_INCLUDE_DIR} -DPYTHON_LIBRARY=${PYTHON_LIBRARIES} .

Install Pulsar-Cpp Client

The pulsar cpp client does not have pre-built binaries for Node.js. So we have to build it ourselves!

git clone https://github.com/apache/pulsar
cd pulsar/pulsar-client-cpp
cmake .
make

Install the Node.js client

export CPLUS_INCLUDE_PATH="$(brew --prefix)/include"
export LIBRARY_PATH="$(brew --prefix)/lib"
npm install pulsar-client

• At the time of writing, the latest version of pulsar-client is not available on npmjs . If that happens, we can manually switch to the version 1.6.0 .
• If node is updated or if we need to rerun npm istall, the environment variables will have to be re-declared (or we can add them into our /.zshrc script).