From: Tim Vaughan <plugd@thelambdalab.xyz>
Date: Tue, 27 Apr 2021 08:39:47 +0000 (+0200)
Subject: Now using URLs and UUIDs for actor addressing.
X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?p=sam.git;a=commitdiff_plain;h=369b3f9b8089c1a6045d1ae8b99295f97c7056dd

Now using URLs and UUIDs for actor addressing.
---

diff --git a/sam.scm b/sam.scm
index 656338d..c819ca5 100644
--- a/sam.scm
+++ b/sam.scm
@@ -8,44 +8,44 @@
         matchable
         srfi-18 ; threads
         srfi-69 ; hash-table
+        uuid ; ids for actors
+        uri-generic
         udp
         fifo)
 
 ;; Actors
 
-(define (make-machine host port)
-  (cons host port))
-(define (machine-host m) (car m))
-(define (machine-port m) (cdr m))
+(define this-host "localhost")
+(define this-port 1234)
 
-(define this-machine (make-machine "localhost" 1234))
+(define (make-address host port id)
+  (make-uri #:scheme "actor"
+            #:host host
+            #:port port
+            #:path (list '/ id)))
 
-(define next-actor-id
-  (let ((mutex (make-mutex "actor id mutex"))
-        (next-id 1))
+(define next-local-address
+  (let ((mutex (make-mutex "actor address mutex")))
     (lambda ()
       (let ((res #f))
         (mutex-lock! mutex)
-        (set! res next-id)
-        (set! next-id (+ next-id 1))
+        (set! res (make-address this-host this-port (uuid)))
         (mutex-unlock! mutex)
         res))))
 
-(define (address-id address) (car address))
-(define (address-machine address) (cdr address))
-(define (make-address id machine)
-  (cons id machine))
+(define (address-id address) (cadr (uri-path address)))
 
 (define (address-local? address)
-  (equal? (address-machine address)
-          this-machine))
+  (and (equal? (uri-host address) this-host)
+       (equal? (uri-port address) this-port)))
 
 (define actor-table (make-hash-table))
 
 (define (make-actor beh)
-  (let* ((id (next-actor-id)))
+  (let* ((address (next-local-address))
+         (id (address-id address)))
     (hash-table-set! actor-table id beh)
-    (make-address id this-machine)))
+    address))
   
 (define (deliver-message address . message)
   (let ((id (address-id address)))