FNCore provides the core service functionality for the FriendlyNeighbor project. It does the heavy lifting for other services with data transfer based on gRPC/Protocol Buffers.

To get started with FnCore you need to obtain a binary of the FnCore build. They are available at the releases section. You can use the jar file to directly run the application.

To run, you need to need to have Java 8 (Not above) installed. It is recommended to customize the fnconfig.examples.properties according to your needs and use it in the following way:

If you already have an fnconfig.properties file in the directory, run:

java -jar fncore-0.3.1.jar

To use a properties file from another directory, add the full path as an argument:

java -jar fncore-0.3.1.jar /home/fnconfig.properties

This will try to read the specified properties file based on availability. If it does fail or has missing values, the server will read from the defaults.

The properties file should also include a secret account service key file in json format that can be obtained from FCM admin console.

If you'd like to build from source, follow along:

For building the project do the following:

Clone the project

git clone https://github.com/2dsharp/FriendlyNeighborCore.git
cd FriendlyNeighborCore/

To choose a custom port number, server name etc. head over to the configuration.properties file in the src/main/resources/ directory and change the configuration to your preferences.

Once you are done configuring, do either of the following methods.

If you'd like to change something on the service itself and test it on your local machine, I'd personally prefer this method since it can use your local .m2 repository.

• Java 8 (Not above, a core dependency (Guice) doesn't have proper support for 8+ yet)
• Apache Maven

If you already have maven installed in your system, you can compile the source to generate a binary.

• mvn clean package to build the system. It will run all the tests in the project and verify everything's alright. If the tests fail, it probably is because there was already a mongo or redis server running on your machine. Turn them off and run mvn clean package once again. A binary will be generated at target/, enter the directory.

• Run the generated binary with: java -jar fncore-0.1.0.jar

If you'd like to use the FnCore API, run it in an isolated container with Docker without having to set up maven on your own system. This is advantageous if you want to run mongo/redis inside the container. Docker will download all the dependencies for you. Helper scripts are available to run them:

Warning: The docker build by default uses port 9120 and uses the defaults specified in src/main/resources/configuration.properties. You can override them by changing the file before building or passing a custom fnconfig.properties to /home/app/ with the defaults you want (recommended). Needless to say that if you change the default server.port variable you have to change the Dockerfile to expose the port you want.

To continue with the defaults, just override the mongo/redis connection options and the rest are better left untouched.

# Make sure the scripts are executable
sudo chmod +x build.sh
sudo chmod +x fncore

# Build the project, this will create a container for you exposing port 9120
./build.sh

# Run the service
./fncore

The service by default will be using port 9120 for any communication with other services over gRPC.

Use the .proto files at src/main/proto to use the API.

By default, the service requires MongoDB to be running on its default port for persisting data. If you are running on Docker you'll have to setup networking between the database server and FnCore yourself.

• Configurable Mongo connection
• Easy networking with Docker
• Support Java 8+
• Pre-compiled binaries
• Add build script for configuration