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Eclipse RAP and sticky sessions [message #1782009]

Thu, 15 February 2018 22:14

Mark Proe

Messages: 34
Registered: July 2009

Member

Hello,

According to this documentation, RAP requires sticky sessions to run on a load balancer:

https://wiki.eclipse.org/RAP/RWT_Cluster#Introduction

My question: Is it the RAP runtime as a whole that requires sticky sessions here? Or is it only particular parts of RAP (e.g. the workbench) that require sticky sessions? In other words, if I were have a simplistic RWT dialog and nothing more, would that still require sticky sessions to run on a load balancer?

I'm just trying to understand if there are any components of RAP can that run on a load balancer without sticky sessions (since those are not allowed on my deployment), or if it is all or nothing.

Thanks,
Mark

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Re: Eclipse RAP and sticky sessions [message #1782118 is a reply to message #1782009]

Sun, 18 February 2018 21:49

Chris Fairhall

Messages: 221
Registered: February 2011

Senior Member

If you run in SWT_COMPATIBILITY mode, you must use sticky sessions, as the session requires its own thread. Threads can not be shared between JVM's

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Re: Eclipse RAP and sticky sessions [message #1782218 is a reply to message #1782118]

Tue, 20 February 2018 14:20

Mark Proe

Messages: 34
Registered: July 2009

Member

Chris,

How do I know whether my application is running in SWT_COMPATIBILITY mode?

We are using Eclipse RAP 2.3 (Luna), if that matters.

Thanks,
Mark

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Re: Eclipse RAP and sticky sessions [message #1782249 is a reply to message #1782218]

Tue, 20 February 2018 21:38

Chris Fairhall

Messages: 221
Registered: February 2011

Senior Member

If you ever call Display#sleep or run the Eclipse Workbench, you're in SWT_COMPATIBILITY mode, as that method throws an exception in JEE mode

Here's some documentation:
https://www.eclipse.org/rap/developers-guide/devguide.php?topic=application-setup.html&version=2.3

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