Add a second pipeline to demonstrate navigation (#30)

dev.exs

@@ -59,6 +59,45 @@ defmodule Demo.Pipeline do
   end
 end
 
+defmodule Demo.SecondPipeline do
+  use Broadway
+
+  def start_link(opts) do
+    Broadway.start_link(__MODULE__,
+      name: __MODULE__,
+      producer: [
+        module: {Broadway.DummyProducer, opts},
+        concurrency: 1
+      ],
+      processors: [
+        default: [concurrency: 2]
+      ],
+      batchers: [
+        default: [batch_size: 6, concurrency: 2, batch_timeout: 1000],
+      ]
+    )
+  end
+
+  @impl true
+  def handle_message(_, %Broadway.Message{} = message, _) do
+    Broadway.Message.update_data(message, fn data ->
+      hex = Base.encode16(:crypto.strong_rand_bytes(64))
+
+      String.upcase(data <> hex)
+    end)
+    |> Broadway.Message.put_batcher(:default)
+  end
+
+  @impl true
+  def handle_batch(:default, messages, _, _) do
+    Enum.map(messages, fn message ->
+      Broadway.Message.update_data(message, fn data ->
+        String.downcase(data)
+      end)
+    end)
+  end
+end
+
 defmodule FakeProducer do
   use GenServer
 
@@ -74,6 +113,7 @@ defmodule FakeProducer do
 
   def handle_info(:publish, _timer) do
     for i <- 1..1234, do: Broadway.test_message(Demo.Pipeline, "hello #{i}")
+    for i <- 1..100, do: Broadway.test_message(Demo.SecondPipeline, "hello #{i}")
 
     timer = Process.send_after(self(), :publish, 100)
 
@@ -164,6 +204,7 @@ Task.start(fn ->
   children = [
     {Phoenix.PubSub, [name: Demo.PubSub, adapter: Phoenix.PubSub.PG2]},
     Demo.Pipeline,
+    Demo.SecondPipeline,
     FakeProducer,
     DemoWeb.Endpoint
   ]