Allow plugin to be loaded multiple times

index.js

@@ -27,7 +27,7 @@ const validOptions = Joi.array().items(Joi.object({
 function register(server, opts) {
 	const value = Joi.attempt(opts, validOptions);
 
-	const snsInstances = [];
+	const snsInstances = (server.plugins.hookido && server.plugins.hookido.snsInstances) || [];
 	value.forEach((config) => init(config));
 	server.expose('snsInstances', snsInstances);
 	return;
@@ -80,5 +80,6 @@ function register(server, opts) {
 
 module.exports = {
 	name: 'hookido',
-	register
+	register,
+	multiple: true
 };

test/index.test.js

@@ -382,4 +382,41 @@ describe('Hookido Hapi Plugin', () => {
 		expect(server.plugins.hookido.snsInstances).to.have.a.lengthOf(2);
 
 	});
+
+	it('supports to load multiple times', async () => {
+
+		const server = new Hapi.Server();
+
+		await server.register({
+			plugin,
+			options: {
+				route: {
+					path: '/foobar'
+				},
+				handlers: {
+					notification: () => {}
+				}
+			}
+		});
+
+		await server.register({
+			plugin,
+			options: {
+				route: {
+					path: '/foobar2'
+				},
+				handlers: {
+					notification: () => {}
+				}
+			}
+		});
+
+		const table = server.table();
+
+		expect(table[0].path).to.equal('/foobar');
+		expect(table[1].path).to.equal('/foobar2');
+		expect(server.plugins.hookido.snsInstances).to.have.a.lengthOf(2);
+
+	});
+
 });