go/r3-eventbroker_zmq/smallbrain.go

   1 // (c) Bernhard Tittelbach, 2013
   2
   3 package main
   4
   5 import (
   6     zmq "github.com/vaughan0/go-zmq"
   7     r3events "svn.spreadspace.org/realraum/go.svn/r3events"
   8 )
   9
  10 type hippocampus map[string]interface{}
  11
  12 func BrainCenter( zmq_ctx *zmq.Context, listen_addr string, event_chan <- chan interface{} ) {
  13     zbrain_chans, err := ZmqsBindNewReplySocket(zmq_ctx, listen_addr)
  14     if err != nil { panic(err) }
  15     defer zbrain_chans.Close()
  16     h := make(hippocampus,5)
  17
  18     for { select {
  19         case event, ec_still_open := <- event_chan:
  20             if ! ec_still_open { return }
  21             h[r3events.NameOfStruct(event)] = event
  22             Debug_.Printf("Brain: stored %s, %s", r3events.NameOfStruct(event), event)
  23
  24         case brain_request := <- zbrain_chans.In():
  25             if len(brain_request) == 0 { continue }
  26             requested_eventname := string(brain_request[0])
  27             Debug_.Printf("Brain: received request: %s", requested_eventname)
  28             retr_event, is_in_map := h[requested_eventname]
  29             if is_in_map {
  30                 data, err := r3events.MarshalEvent2ByteByte(retr_event)
  31                 if err == nil {
  32                     zbrain_chans.Out() <- data
  33                     continue
  34                 } else {
  35                     Syslog_.Print("BrainCenter", err)
  36                     Debug_.Print("BrainCenter", err)
  37                 }
  38             }
  39             zbrain_chans.Out() <- [][]byte{[]byte("UNKNOWN")}
  40     } }
  41 }