Freestyle RPC is a purely functional library for building RPC endpoint-based services with support for RPC and HTTP/2.
Also known as frees-rpc, it brings the ability to combine RPC protocols, services, and clients in your Freestyle program, thanks to gRPC.
frees-rpc is cross-built for Scala 2.11.x and 2.12.x.
It's divided into multiple and different artifacts, grouped by scope:
Server: specifically for the RPC server.Client: focused on the RPC auto-derived clients byfrees-rpc.Server/Client: used from other artifacts for both Server and Client.Test: useful to testfrees-rpcapplications.
| Artifact Name | Scope | Mandatory | Description |
|---|---|---|---|
frees-rpc-server |
Server | Yes | Needed to attach RPC Services and spin-up an RPC Server. |
frees-rpc-client-core |
Client | Yes | Mandatory to define protocols and auto-derived clients. |
frees-rpc-client-netty |
Client | Yes* | Mandatory on the client side if we are using Netty in the server side. |
frees-rpc-client-okhttp |
Client | Yes* | Mandatory on the client side if we are using OkHttp in the server side. |
frees-rpc-config |
Server/Client | No | Provides configuration helpers using frees-config to load the application configuration values. |
frees-rpc-marshallers-jodatime |
Server/Client | No | Provides marshallers for serializing and deserializing the LocalDate and LocalDateTime joda instances. |
frees-rpc-prometheus-server |
Server | No | Scala interceptors which can be used to monitor gRPC services using Prometheus, on the Server side. |
frees-rpc-prometheus-client |
Client | No | Scala interceptors which can be used to monitor gRPC services using Prometheus, on the Client side. |
frees-rpc-prometheus-shared |
Server/Client | No | Common code for both the client and the server in the prometheus scope. |
frees-rpc-dropwizard-server |
Server | No | Scala interceptors which can be used to monitor gRPC services using Dropwizard metrics, on the Server side. |
frees-rpc-dropwizard-client |
Client | No | Scala interceptors which can be used to monitor gRPC services using Dropwizard metrics, on the Client side. |
frees-rpc-interceptors |
Server/Client | No | Commons related to gRPC interceptors. |
frees-rpc-testing |
Test | No | Utilities to test out frees-rpc applications. It provides the grpc-testing library as the transitive dependency. |
frees-rpc-common |
Server/Client | Provided* | Common things that are used throughout the project. |
frees-rpc-internal |
Server/Client | Provided* | Macros. |
frees-rpc-async |
Server/Client | Provided* | Async instances useful for interacting with the RPC services on both sides, server and the client. |
frees-rpc-netty-ssl |
Server/Client | No | Adds the io.netty:netty-tcnative-boringssl-static:jar dependency, aligned with the Netty version (if that's the case) used in the frees-rpc build. See this section for more information. Adding this you wouldn't need to figure out which would be the right version, frees-rpc gives you the right one. |
Yes*: on the client-side, you must choose eitherNettyorOkHttpas the transport layer.Provided*: you don't need to add it to your build, it'll be transitively provided when using other dependencies.
You can install any of these dependencies in your build as follows:
// required for the RPC Server:
libraryDependencies += "io.frees" %% "frees-rpc-server" % "0.14.1"
// required for a protocol definition:
libraryDependencies += "io.frees" %% "frees-rpc-client-core" % "0.14.1"
// required for the use of the derived RPC Client/s, using either Netty or OkHttp as transport layer:
libraryDependencies += "io.frees" %% "frees-rpc-client-netty" % "0.14.1"
// or:
libraryDependencies += "io.frees" %% "frees-rpc-client-okhttp" % "0.14.1"
// optional - for both server and client configuration.
libraryDependencies += "io.frees" %% "frees-rpc-config" % "0.14.1"
// optional - for both server and client metrics reporting, using Prometheus.
libraryDependencies += "io.frees" %% "frees-rpc-prometheus-server" % "0.14.1"
libraryDependencies += "io.frees" %% "frees-rpc-prometheus-client" % "0.14.1"
// optional - for both server and client metrics reporting, using Dropwizard.
libraryDependencies += "io.frees" %% "frees-rpc-dropwizard-server" % "0.14.1"
libraryDependencies += "io.frees" %% "frees-rpc-dropwizard-client" % "0.14.1"
// optional - for the communication between server and client by using SSL/TLS.
libraryDependencies += "io.frees" %% "frees-rpc-netty-ssl" % "0.14.1"
// optional - for using the jodatime marshallers.
libraryDependencies += "io.frees" %% "frees-rpc-marshallers-jodatime" % "0.14.1"The full documentation is available at the frees-rpc site.
See the examples module.
Freestyle is designed and developed by 47 Degrees
Copyright (C) 2017-2018 47 Degrees. http://47deg.com