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m.core Microservices Framework

Build Status Code Cov

A microservices framework with complete separation of service code from underlying frameworks which can be interchanged without service code changes.

  • Complete separation of each service from underlying web framework and data store framework through interfaces.
  • So different web frameworks and data stores can be easily used without changing the service code at all.
  • Services are composed fluently by injecting web, data, queue, cache and client implementation as needed.
  • Instead of auto incrementing sequence auto generated UUID is used for keys (to support distributed servers).
Tier Supported Planned
Web Sparkjava, Spring Web Flux, Vert.x, Play Micronaut
Client Unirest Resilience4j
Data MongoDB, MySQL, Postgresql, Sqlite, H2, Redis, MapsDB RocksDB, Sqlite, Firebird, Derby, HSQL
Cache Redis Hazelcast, JCache
Queue Redis, Kafka, Pulsar RabbitMQ, Hazelcast

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com.hackorama.m.core:mcore:0.1.0

Signed with PGP key: D791 8556 0576 7757 6235 6402 6C13 01F5 1B93 B750 mcore@hackorama.com

Build

./gradlew build

Code

Simple service

See HelloService.java, more samples.

dependencies {
    implementation 'com.hackorama.m.core:mcore:0.1.0'
}
new Service() {
    private Response hello(Request request) {
        if (request.getPathParams().containsKey("name")) {
            return new Response("Hello " + request.getPathParams().get("name"));
        }
        return new Response("Hello world");
    }
    @Override
    public void configure() {
        GET("/hello", this::hello);
        GET("/hello/{name}", this::hello);
    }

}.configureUsing(new SparkServer("Hello")).start();

Launching service using different frameworks

See UserService.java

Service started with Sparkjava server and an in-memory database.

Service userService = new UserService().configureUsing(new SparkServer("User Service"))
                .configureUsing(new MemoryDataStore()).start();

Same service can also be started with Spring Flux web server and a database like Postgresql/MySQL using JDBC

Service userService = new UserService().configureUsing(new SpringServer("User Service"))
                .configureUsing(new JDBCDataStore()).start();

For this there is no service code changes needed.

If you check the UserService.java there is no framework specific (Sparkjava/Spring Flux) packages imported into the service class, providing complete separation of service from the underlying frameworks.

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