add an example for RingpopHandler

examples/tchannel-forwarding.js

@@ -0,0 +1,93 @@
+// Copyright (c) 2015 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+'use strict';
+
+var TChannel = require('tchannel');
+var Ringpop = require('../index.js');
+var RingpopHandler = require('../ringpop-handler.js');
+
+function App(options) {
+    if (!(this instanceof App)) {
+        return new App(options);
+    }
+
+    var self = this;
+
+    self.name = options.name;
+    self.port = options.port;
+    self.ringpopHosts = options.ringpopHosts;
+
+    self.channel = TChannel();
+    self.ringpop = Ringpop({
+        app: 'app',
+        hostPort: '127.0.0.1:' + self.port,
+        channel: self.channel.makeSubChannel({
+            serviceName: 'ringpop'
+        })
+    });
+
+    self.appChannel = self.channel.makeSubChannel({
+        serviceName: 'app'
+    });
+    self.appChannel.handler = RingpopHandler({
+        channel: self.appChannel,
+        ringpop: self.ringpop,
+        logger: self.channel.logger,
+        realHandler: self.appChannel.handler
+    });
+
+    self.appChannel.register('hello', function hello(req, res, arg2, arg3) {
+        res.headers.as = 'raw';
+        res.sendOk('', 'hello from ' + self.name + ' for ' + req.headers.sk);
+    });
+
+    self.ringpop.setupChannel();
+}
+
+App.prototype.bootstrap = function bootstrap(cb) {
+    var self = this;
+
+    self.channel.listen(self.port, '127.0.0.1', onListen);
+
+    function onListen() {
+        self.ringpop.bootstrap(self.ringpopHosts, onBootstrap);
+    }
+
+    function onBootstrap() {
+        console.log('app: ' + self.name + ' listening on ' +
+            self.channel.address().port);
+    }
+};
+
+if (require.main === module) {
+    var app1 = App({
+        name: 'app1',
+        port: 4040,
+        ringpopHosts: ['127.0.0.1:4040', '127.0.0.1:4041']
+    });
+    var app2 = App({
+        name: 'app2',
+        port: 4041,
+        ringpopHosts: ['127.0.0.1:4040', '127.0.0.1:4041']
+    });
+
+    app1.bootstrap();
+    app2.bootstrap();
+}