From 9d54842c2f5b084ab1b0de4c4b8978cc43297546 Mon Sep 17 00:00:00 2001
From: Mike Vink <mike1994vink@gmail.com>
Date: Tue, 13 Jul 2021 18:30:12 +0200
Subject: feat(WebSockets): client server WebSocket connect

---
 api/src/main/java/akkamon/api/App.java         | 42 +++++++++++++++++++++
 api/src/main/java/akkamon/api/EventSocket.java | 52 ++++++++++++++++++++++++++
 2 files changed, 94 insertions(+)
 create mode 100644 api/src/main/java/akkamon/api/App.java
 create mode 100644 api/src/main/java/akkamon/api/EventSocket.java

(limited to 'api/src')

diff --git a/api/src/main/java/akkamon/api/App.java b/api/src/main/java/akkamon/api/App.java
new file mode 100644
index 0000000..bc462d0
--- /dev/null
+++ b/api/src/main/java/akkamon/api/App.java
@@ -0,0 +1,42 @@
+package akkamon.api;
+
+import org.eclipse.jetty.server.Server;
+import org.eclipse.jetty.server.ServerConnector;
+import org.eclipse.jetty.servlet.ServletContextHandler;
+import org.eclipse.jetty.websocket.server.config.JettyWebSocketServletContainerInitializer;
+
+
+public class App {
+
+    public static void main(String[] args) {
+        Server server = new Server();
+        ServerConnector connector = new ServerConnector(server);
+        connector.setPort(8080);
+        server.addConnector(connector);
+
+        // application "context" ?
+        ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
+        context.setContextPath("/");
+        server.setHandler(context);
+
+        // websocket behaviour
+        // Configure specific websocket behavior
+        JettyWebSocketServletContainerInitializer.configure(context, (servletContext, wsContainer) ->
+        {
+            // Configure default max size
+            wsContainer.setMaxTextMessageSize(65535);
+
+            // Add websockets
+            wsContainer.addMapping("/", EventSocket.class);
+        });
+
+        try {
+            server.start();
+            server.join();
+        }
+        catch (Throwable t) {
+            t.printStackTrace(System.err);
+        }
+
+    }
+}
diff --git a/api/src/main/java/akkamon/api/EventSocket.java b/api/src/main/java/akkamon/api/EventSocket.java
new file mode 100644
index 0000000..1c7bafc
--- /dev/null
+++ b/api/src/main/java/akkamon/api/EventSocket.java
@@ -0,0 +1,52 @@
+package akkamon.api;
+
+import java.util.Locale;
+import java.util.concurrent.CountDownLatch;
+
+import org.eclipse.jetty.websocket.api.WebSocketAdapter;
+import org.eclipse.jetty.websocket.api.Session;
+import org.eclipse.jetty.websocket.api.StatusCode;
+
+
+public class EventSocket extends WebSocketAdapter {
+    private final CountDownLatch closureLatch = new CountDownLatch(1);
+
+    @Override
+    public void onWebSocketConnect(Session sess)
+    {
+        super.onWebSocketConnect(sess);
+        System.out.println("Socket Connected: " + sess);
+    }
+
+    @Override
+    public void onWebSocketText(String message)
+    {
+        super.onWebSocketText(message);
+        System.out.println("Received TEXT message: " + message);
+
+        if (message.toLowerCase(Locale.US).contains("bye")) {
+            getSession().close(StatusCode.NORMAL, "Thanks");
+        }
+    }
+
+    @Override
+    public void onWebSocketClose(int statusCode, String reason)
+    {
+        super.onWebSocketClose(statusCode, reason);
+        System.out.println("Socket Closed: [" + statusCode + "] " + reason);
+        closureLatch.countDown();
+    }
+
+    @Override
+    public void onWebSocketError(Throwable cause)
+    {
+        super.onWebSocketError(cause);
+        cause.printStackTrace(System.err);
+    }
+
+    public void awaitClosure() throws InterruptedException
+    {
+        System.out.println("Awaiting closure from remote");
+        closureLatch.await();
+    }
+}
-- 
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