From d0c2f6e8b3c91dcc018d2029d2cab8e21460fb09 Mon Sep 17 00:00:00 2001
From: Norman Maurer <norman_maurer@apple.com>
Date: Wed, 22 Apr 2020 08:07:27 +0200
Subject: [PATCH] Clarify exception message when ALPN is not supported (#10155)

Motivation:

We should provide more informations when ALPN is not supported and a user tries to use it.

Modifications:

- Use UnsupportedOperationException

Result:

Easier to debug ALPN problems
---
 .../handler/ssl/JdkAlpnApplicationProtocolNegotiator.java      | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/handler/src/main/java/io/netty/handler/ssl/JdkAlpnApplicationProtocolNegotiator.java b/handler/src/main/java/io/netty/handler/ssl/JdkAlpnApplicationProtocolNegotiator.java
index eb4a494afe..c4ca7b9b8c 100644
--- a/handler/src/main/java/io/netty/handler/ssl/JdkAlpnApplicationProtocolNegotiator.java
+++ b/handler/src/main/java/io/netty/handler/ssl/JdkAlpnApplicationProtocolNegotiator.java
@@ -144,7 +144,8 @@ public final class JdkAlpnApplicationProtocolNegotiator extends JdkBaseApplicati
                 return isServer ? JettyAlpnSslEngine.newServerEngine(engine, applicationNegotiator)
                         : JettyAlpnSslEngine.newClientEngine(engine, applicationNegotiator);
             }
-            throw new RuntimeException("Unable to wrap SSLEngine of type " + engine.getClass().getName());
+            throw new UnsupportedOperationException("ALPN not supported. Unable to wrap SSLEngine of type '"
+                    + engine.getClass().getName() + "')");
         }
     }