Face2Phase

Face2Phase is a Two Phase Commit implementation over HTTP for Neo4J graph databases using Reactive Streams, developed with Spring Framework for back-end and ReactJS for front-end

Two Phase Commit is a type of atomic commitment protocol (ACP). It is a distributed algorithm that coordinates all the processes that participate in a distributed atomic transaction on whether to commit or abort (roll back) the transaction (it is a specialized type of consensus protocol)

Architecture

Each server runs the same code (symmetrically) with a different configuration file (application.properties, replica.properties, etc), you can define servers ports, neo4j instance and specify replicas in the properites file

For example:

server.port=8080

spring.data.neo4j.uri=bolt://localhost:7687

insta2Phase.replicas.urlList=localhost:8081, localhost:8082

logging.file=primary.log

Creating a new replica with a new configuation file:

In this example the configuation file stored in src/main/resources/replica.properties You can create as many as you like

@SpringBootApplication
public class ReplicaApplication {

    public static void main(String[] args) {
        new SpringApplicationBuilder(ReplicaApplication.class)
                .properties("spring.config.name:replica")
                .build()
                .run(args);
    }
}

Defining New Entities and Two Phase operation

• In this project the main example is crud operations and "follow account" operation for the Account entity
• Each operation should define a Query in the "crudQueries" package and a service thats implements TwoPhaseCrudOperation interface