3.3-to-3.4.md

title	description	lead	date	lastmod	weight
Migrating from 3.3 to 3.4	Gatling migration from 3.3 to 3.4		2021-04-20 18:30:56 +0200	2021-04-20 18:30:56 +0200	2090300

{{< alert warning >}} There's a known issue with headerRegex that forces you to force the parameter to a String when using the predefined HTTP header names constants, eg header(HttpHeaderNames.ContentType.toString, "bar"). Sadly, this is something we'll only be able to fix in Gatling 3.5.0. {{< /alert >}}

{{< alert tip >}} Gatling 3.4 is not binary compatible with previous versions. Any code compiled with a previous version must be recompiled in order to be executed with Gatling 3.4. Changes listed below are only about source compatibility changes. {{< /alert >}}

Core

• the Session based versions of transform and transformOption were renamed into transformWithSession and transformOptionWithSession.
• xpath check's namespaces are now a Map[String, String] instead of a List[(String, String)]
• Configuration option in gatling.config related to ssl, sockets, and netty were moved around in an effort to share amongst multiple protocol supports, eg MQTT (Gatling Enterprise).

HTTP

• hostNameAliases now takes a Map[String, List[String]] instead of a Map[String, String]