Statechart Tools 2.5.0 – New and noteworthy

Today, we released the new version, 2.5.0, of YAKINDU Statechart Tools to pass the time until Christmas Eve!

This is the first release of the statechart tool that has been based on the results of our ongoing survey. Thank you to everyone who took part. We really appreciate your help.

We provide an update site that is compatible with Eclipse Luna and Mars as well as a product bundle that is shipped with an Eclipse Mars.SR1. Get it for free.

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In total, 54 bugs have been fixed and a lot of feature requests have been implemented. You can find a complete list of all fixed issues here. We also did some major refactoring "under the hood" as preliminary work for the upcoming YAKINDU Statechart Tools Professional Edition.

Let's have a look what's new and noteworthy.

Extended Documentation and Tutorials

The new product bundle is shipped with a welcome page for easy access to example projects and tutorials.

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This is especially useful for statechart tool beginners that do not have experience with Eclipse yet. We also added some new examples that demonstrate the different features of YAKINDU Statechart Tools.

Constant Declarations

We extended our expression language to allow the definition of constant values. Instead of using the 'var' keyword you can now use the 'const' keyword to define constant values.

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All code generators are adapted to generate constant definitions.

Task Markers

With the release of YAKINDU Statechart Tools 2.5.0 we added task markers to the expression language. By default you will get markers for TODO and FIXME in single and multiline comments. These tags will also be highlighted and tasks will appear in the tasks view. 

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You can open the view via Window -> Show View -> Tasks.

Enhanced Source Code Generation

The quality of the generated source code has been further improved towards a MISRA compatible c code generation. The following issues have been fixed:

  • generated functions have a single return point (MISRA-C:2004 Rule 14.07).
  • query functions have constant pointers (MISRA-C:2004 Rule 16-07).
  • control statements are enclosed with braces (MISRA-C:2004 Rule 14.09).
  • single line comments replaced with multi line comments (MISRA-C:2004 Rule 02.02 for C99).

Runnable Wrapper for the Java state machine

The GeneratorModel for Java Statemachines contains a new optional feature for a runnable wrapper class now. It can be configured like this:

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The additional generated Java class provides a thread-safe wrapper for the generated state machine implementation. In addition to the specific state machine interface it implements the Runnable interface and can be executed in a thread. It implements an event queue and event-driven execution semantics. As the wrapper adds thread safety any number of client threads may call the state machine.

Improved simulation and sub diagram highlighting

The highlighting support that is used during simulation to highlight active states and transitions was reworked to improve performance when simulating large statecharts.

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Subdiagrams are highlighted in the image tooltip on the subdiagram icon as well as in the editor when diving into the sub diagram.

Miscellaneous

We also fixed a lot of issues reported via our User Group, for example, a whole chart documentation mode switch was implemented and a reported problem with sc_string type in C-Generator. So if you have any issues regarding the new version, we would be happy to get feedback!

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About The Author

Andreas Mülder works as a software engineer at itemis AG in Lünen, Germany. He is especially interested in Eclipse modeling technologies and co project lead of the open source project YAKINDU Statechart tools. For more information, visit http://www.statecharts.org