From e31d853e2b26d334d9ea78338b61da3d963cf0dd Mon Sep 17 00:00:00 2001
From: Zachary Hueras <zhueras@amdtelemedicine.com>
Date: Sat, 20 Apr 2019 14:56:24 -0400
Subject: [PATCH] Sketching some more stuff out

---
 lib/adapters/cluster-slave.js |  6 +++++
 lib/adapters/cluster.js       | 42 +++++++++++++++++++++--------------
 lib/otp/supervisor.js         | 29 +++++++++++++++++++++---
 3 files changed, 57 insertions(+), 20 deletions(-)

diff --git a/lib/adapters/cluster-slave.js b/lib/adapters/cluster-slave.js
index 0bf9481..adf2c18 100644
--- a/lib/adapters/cluster-slave.js
+++ b/lib/adapters/cluster-slave.js
@@ -63,6 +63,8 @@ function create_adapter(emitter) {
         switch (message.cmd) {
             case 'rpc-reply':
                 return handle_rpc_reply(message);
+            case 'rpc':
+                return handle_rpc(message);
             case 'deliver':
                 return deliver(message.payload, false);
         }
@@ -80,6 +82,10 @@ function create_adapter(emitter) {
         return resolve(reply.result);
     }
 
+    async function handle_rpc(message) {
+        log('rpc : %o', message);
+    }
+
     async function deliver(message, tryMaster = true) {
         log('deliver : %O', message);
 
diff --git a/lib/adapters/cluster.js b/lib/adapters/cluster.js
index 16c6902..bc3be2e 100644
--- a/lib/adapters/cluster.js
+++ b/lib/adapters/cluster.js
@@ -3,6 +3,7 @@ const path    = require('path');
 const os      = require('os');
 const serialize = require('../serialize');
 const debug        = require('debug');
+const {PID}        = require('../types');
 
 const log = debug('open-telecom:adapters:cluster');
 
@@ -12,29 +13,36 @@ function create_cluster_manager(cluster = node_cluster) {
             this.workers = [];
             this.node_ids = 0;
             this.cpus    = os.cpus();
+            this.resolvers    = new Map();
+            this.node_workers = new Map();
         }
 
-        start() {
+        async start() {
             cluster.setupMaster({
-                exec: path.resolve(__dirname, 'cluster-slave.js'),
+                exec: path.resolve(__dirname, 'slave-start.js'),
             });
 
-            for (let cpu of this.cpus) {
-                const worker = cluster.fork();
-                this.workers.push(worker);
-            }
-
             cluster.on('message', (worker, message) => {
                 log('message : %o', message);
                 const parsed = serialize.parse(message);
                 log('parsed : %o', parsed);
                 this.handle_message(worker, parsed);
             });
+
+            for (let cpu of this.cpus) {
+                log('fork');
+                const worker = cluster.fork();
+                this.workers.push(worker);
+                await new Promise(resolve => setTimeout(resolve, 50));
+            }
         }
 
-        async load_module(load_module) {
-            for (let worker in this.workers) {
-                await this.rpc(worker, 'load_module', [module]);
+        async load_module(module) {
+            log('load_module : %o', module);
+            for (let node_id of this.node_workers.keys()) {
+                log('load_module : deliver : %o', node_id);
+                await this.deliver_message(
+                    {to: PID.of(node_id, 0), msg: {cmd: 'load_module', args: [module]}});
             }
         }
 
@@ -49,6 +57,7 @@ function create_cluster_manager(cluster = node_cluster) {
                     break;
                 case 'register_node':
                     const node_id = ++this.node_ids;
+                    this.node_workers.set(node_id, worker);
                     result        = node_id;
                     break;
                 default:
@@ -62,14 +71,13 @@ function create_cluster_manager(cluster = node_cluster) {
             worker.send(serialize.stringify({cmd: 'rpc-reply', ref: message.ref, error, result}));
         }
 
-        deliver_message(message) {}
+        deliver_message(message) {
+            log('deliver_message : %o', message);
 
-        rpc(worker, cmd, args = []) {
-            return new Promise((resolve, reject) => {
-                const ref = this.refs++;
-                worker.send(serialize.stringify({cmd, args, ref}));
-                this._resolvers.set(ref, {resolve, reject});
-            });
+            const node_id = message.to.node;
+            const worker  = this.node_workers.get(node_id);
+
+            worker.send(serialize.stringify({cmd: 'deliver', payload: message}))
         }
     }
 
diff --git a/lib/otp/supervisor.js b/lib/otp/supervisor.js
index a96e74a..f448f57 100644
--- a/lib/otp/supervisor.js
+++ b/lib/otp/supervisor.js
@@ -1,5 +1,8 @@
 const proc_lib = require('./proc_lib');
 
+const ONE_FOR_ONE = Symbol.for('$otp:supervisor:one_for_one');
+const ONE_FOR_ALL = Symbol.for('$otp:supervisor:one_for_all');
+
 async function start(ctx, callbacks) {
     return proc_lib.start((ctx) => init(ctx, callbacks));
 }
@@ -8,11 +11,31 @@ async function start_link() {
     return proc_lib.start_link((ctx) => init(ctx, callbacks));
 }
 
-async function init(ctx) {}
+async function init(ctx, callbacks) {
+    const {ok, strategy, children} = callbacks.init(ctx);
+
+    if (!ok)
+        throw new Error('invalid initial state');
 
-async function loop(state) {}
+    const spawned = children.map(descriptor => {
+        const pid = ctx.spawn_link(descriptor);
+        return pid;
+    });
+
+    return loop(ctx, {children, spawned, strategy});
+}
+
+async function loop(ctx, state) {
+    let running = true;
+    while (running) {
+        const message = ctx.receive();
+    }
+}
 
 module.exports = {
     start,
-    start_link
+    start_link,
+
+    ONE_FOR_ONE,
+    ONE_FOR_ALL,
 };