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Is there a simple way to create a fake context? [message #1848930]

Fri, 24 December 2021 02:04

Manuel Mall

Messages: 26
Registered: September 2015

Junior Member

We like to run some scheduled background processes (in this case using the Quartz library, but that doesn't really matter) in our RAP application. As those background jobs will use some shared code they require a RAP Context to avoid SingletonUtil.getSessionInstance() throwing an exception like this:

java.lang.IllegalStateException: Invalid thread access
	at org.eclipse.rap.rwt.RWT.checkContext(RWT.java:704)
	at org.eclipse.rap.rwt.RWT.getUISession(RWT.java:588)
	at org.eclipse.rap.rwt.SingletonUtil.getSessionInstance(SingletonUtil.java:58)

Our requirement is similar to the problem the TestContext class solves. However, the TestContext class relies heavily on RWT internal non public APIs therefore just copying the code (it needs modifications to remove the dependency on JUnit) causes access issues in an OSGi environment. Are there solutions to this using public RAP RWT APIs?

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Re: Is there a simple way to create a fake context? [message #1849138 is a reply to message #1848930]

Wed, 05 January 2022 09:36

Ivan Furnadjiev

Messages: 2426
Registered: July 2009
Location: Sofia, Bulgaria

Senior Member

Hi Manuel,

if you want to execute a code in the UI thread you can use:

RWT.getUISession(display).exec(runnable);

Also take a look at the Threads topic in RAP Developers Guide [1].

[1] https://www.eclipse.org/rap/developers-guide/devguide.php?topic=threads.html&version=3.19

HTH,
Ivan

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