Compose an HTTP API out of a collection of HTTP service backends.

Backend services register themselves with frontend exchanges by pushing their configuration into etcd. This configuration describes HTTP methods and URL patterns that the service is capable of responding to. Exchanges respond to API consumers and route their requests to service backends. They watch for configuration changes in etcd and update their routing rules to add and remove routes as services come and go.

go get github.com/jkakar/switchboard

API documentation is at godoc.org/github.com/jkakar/switchboard.

The examples/exchange.go and examples/service.go programs demonstrate Switchboard. You need to run etcd on http://127.0.0.1:4001 before running the example programs. If you're using a git checkout you can build and run etcd with ./build && bin/etcd -v. Next, start the exchange and a handful of service processes in their own terminals.

PORT=5000 go run examples/exchange.go
PORT=5001 go run examples/service.go
PORT=5002 go run examples/service.go
PORT=5003 go run examples/service.go

Now you can make requests and watch the exchange pass them to service backends:

curl http://localhost:5000/hello/jane

Copyright 2014, Jamshed Kakar <jkakar@kakar.ca>

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at:

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.