# Understanding Class Loaders - Apache Tomcat?

**URL:** <https://forum.inductiveautomation.com/t/understanding-class-loaders-apache-tomcat/12062>\
**Category:** Module Development\
**Created:** [August 24, 2016, 5:32pm UTC](https://forum.inductiveautomation.com/t/understanding-class-loaders-apache-tomcat/12062 "2016-08-24T17:32:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sg7](https://avatars.discourse-cdn.com/v4/letter/s/838e76/32.png) [@sg7](https://forum.inductiveautomation.com/u/sg7)\
**Post date:** [August 24, 2016, 5:32pm UTC](https://forum.inductiveautomation.com/t/understanding-class-loaders-apache-tomcat/12062/1 "2016-08-24T17:32:08Z")

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1. In the following chapter of the :  
Ignition SDK Programmer’s Guide Ignition SDK Programmers Guide Getting Started

[docs.inductiveautomation.com:84 … ss+Loaders](https://docs.inductiveautomation.com:8443/display/SE/Understanding+Class+Loaders)

the diagram for the Gateway shows dependency on the Apache Tomcat. Why?

1. Does the Gateway use Apache Tomcat or Jetty framework?

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [August 24, 2016, 5:41pm UTC](https://forum.inductiveautomation.com/t/understanding-class-loaders-apache-tomcat/12062/2 "2016-08-24T17:41:31Z")

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It used to use Tomcat, now it uses Jetty.