Convert from jsonschema to avro schema, and vice versa.
$ mvn package
$ java -jar target/json-schema-converter-<version>-jar-with-dependencies.jar server config.yaml
$ curl -D - -X POST -H "Content-Type: application/json" -d @map.json http://localhost:8080/json; echo
HTTP/1.1 200 OK
Date: Thu, 17 Sep 2015 21:55:36 GMT
Content-Type: application/json
Content-Length: 30
{"type":"map","values":"long"}
$ curl -D - -X POST -H "Content-Type: application/json" -d @map.avro http://localhost:8080/avro; echo
HTTP/1.1 200 OK
Date: Thu, 17 Sep 2015 21:56:37 GMT
Content-Type: application/json
Content-Length: 120
{"type":"object","additionalProperties":{"type":"integer","minimum":-9223372036854775808,"maximum":9223372036854775807}}