JRuby Scala Distances

JRuby Scala Distances is a simple API to use ScalaDistance from JRuby.

Why ?

In JRuby, it's impossible to use the library ScalaDistance directly from your code. For example you cant get a TravelMode directly from JRuby. Also, it's difficult to pass the required implicit ContextShift to call ScalaDistance.

So with JRuby Scala Distances you don't have to deal with this kind of problem.

How to use it ?

Simpy create a RedisConfiguration and a GoogleApiConfiguration objects :

    redisConfig = RedisConfiguration.new(  
      redis_host, # host  
      redis_port, # port  
      Duration.apply("1s") # expirationTimeout  
    )  
      
    googleApiConfig = GoogleApiConfiguration.new(  
      gmap_api_key, # apiKey  
      Duration.apply("1s"), # connectTimeout  
      Duration.apply("2s"), # readTimeout  
      50 # queryRateLimit  
    )

and then create your JRubyScalaDistance :

    scalaDistanceApi = JRubyScalaDistance.new(googleApiConfig, redisConfig)

Now you can call the method getDrivingDistance like this :

    origin = com.colisweb.distances.Types::LatLong.new(41.63253, -40.27242)
    destination = com.colisweb.distances.Types::LatLong.new(-57.24373, -52.27306)
      
    scalaDistanceApi  
      .getDrivingDistance(origin, destination)  
      .fold(  
        -> (failure) { failure },  
        -> (distance) { Success({ distance: distance.length.value, duration: distance.duration.toMinutes }) }  
      )

Then don't forget to add an at_exit in your ruby code to cleanup all threads at exits :

at_exit do
  scalaDistanceApi.shutdown if scalaDistanceApi.present?
end