WIP: initial prototype

- Updated ConnectionPool internals
- Added ConnectionPool.update api
- Experimental: return http response in transform

lib/Transport.js

@@ -34,6 +34,7 @@ class Transport {
     }
   }
 
+  // TODO: should be able to send a stream of json data
   request (params, callback) {
     callback = once(callback)
     const result = { body: null, statusCode: null, headers: null, warnings: null }
@@ -115,6 +116,13 @@ class Transport {
         result.warnings = headers['warning'].split(/(?!\B"[^"]*),(?![^"]*"\B)/)
       }
 
+      // TODO: expose `asStream` option for returning the
+      //       body already parsed?
+      if (params.asHttpResponse === true) {
+        callback(null, response)
+        return
+      }
+
       var payload = ''
       // collect the payload
       response.setEncoding('utf8')
@@ -215,9 +223,7 @@ class Transport {
 
       debug('Sniffing ended successfully', body)
       const hosts = this.connectionPool.nodesToHost(body.nodes)
-      this.connectionPool
-        .empty()
-        .addConnection(hosts)
+      this.connectionPool.update(hosts)
 
       callback(null, hosts)
     })