factor out rtpengine into package

lib/call-session.js

@@ -1,6 +1,5 @@
 const Emitter = require('events');
-const Client = require('rtpengine-client').Client ;
-const rtpengine = new Client();
+const {getRtpEngine} = require('jambonz-rtpengine-utils')(process.env.JAMBONES_RTPENGINES.split(','));
 const {makeRtpEngineOpts} = require('./utils');
 const {forwardInDialogRequests} = require('drachtio-fn-b2b-sugar');
 const {SipError} = require('drachtio-srf');
@@ -15,17 +14,22 @@ class CallSession extends Emitter {
     this.performLcr = this.srf.locals.dbHelpers.performLcr;
     this.logger = logger.child({callId: req.get('Call-ID')});
     this.useWss = req.locals.registration && req.locals.registration.protocol === 'wss';
-
-    // TODO: we always using the first rtpengine here
-    // we should be load balancing, and doing some form of health checking
-    this.offer = rtpengine.offer.bind(rtpengine, this.srf.locals.rtpEngines[0]);
-    this.answer = rtpengine.answer.bind(rtpengine, this.srf.locals.rtpEngines[0]);
-    this.del = rtpengine.delete.bind(rtpengine, this.srf.locals.rtpEngines[0]);
   }
 
   async connect() {
+    const engine = getRtpEngine(this.logger);
+    if (!engine) {
+      this.logger.info('No available rtpengines, rejecting call!');
+      return this.res.send(480);
+    }
+    debug(`got engine: ${JSON.stringify(engine)}`);
+    const {offer, answer, del} = engine;
+    this.offer = offer;
+    this.answer = answer;
+    this.del = del;
+
     this.rtpEngineOpts = makeRtpEngineOpts(this.req, false, this.useWss);
-    this.rtpEngineResource = {destroy: this.del.bind(rtpengine, this.rtpEngineOpts.common)};
+    this.rtpEngineResource = {destroy: this.del.bind(null, this.rtpEngineOpts.common)};
     let proxy, uris;
 
     try {

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "sbc-outbound",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -1818,6 +1818,25 @@
         "redis": "^2.8.0"
       }
     },
+    "jambonz-rtpengine-utils": {
+      "version": "0.0.5",
+      "resolved": "https://registry.npmjs.org/jambonz-rtpengine-utils/-/jambonz-rtpengine-utils-0.0.5.tgz",
+      "integrity": "sha512-tkAwXkV6nYVBvF/epcIoNOUX8NDepFo25WP4a2DBu0+g8e76MzDChXGuziYRGswL3TFZxd6faTbU44rg+UcoMA==",
+      "requires": {
+        "debug": "^4.1.1",
+        "rtpengine-client": "0.0.9"
+      },
+      "dependencies": {
+        "rtpengine-client": {
+          "version": "0.0.9",
+          "resolved": "https://registry.npmjs.org/rtpengine-client/-/rtpengine-client-0.0.9.tgz",
+          "integrity": "sha512-AkeDx6QEk/WtIBGnoxf3/lWbV0h4JTlPPBCHW+qjYT4xfKYzzCFCmP639ovuIJhE0L6aL89Vv0YmlQdEWo6ofw==",
+          "requires": {
+            "bencode": "^1.0.0"
+          }
+        }
+      }
+    },
     "js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sbc-outbound",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "main": "app.js",
   "engines": {
     "node": ">= 8.10.0"
@@ -30,6 +30,7 @@
     "debug": "^4.1.1",
     "drachtio-fn-b2b-sugar": "^0.0.12",
     "drachtio-srf": "^4.4.28",
+    "jambonz-rtpengine-utils": "0.0.5",
     "jambonz-db-helpers": "^0.3.2",
     "jambonz-mw-registrar": "^0.1.0",
     "pino": "^5.14.0",