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Difference between revisions of "VIATRA2/Live Transformations/HelloWorld"
(New page: The following "hello world" trigger shows another important property of the live transformation engine, the handling of the ASMfunctions. These can be considered as global variables, the v...) |
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| − | The following "hello world" trigger | + | The following "hello world" trigger is actually the simplest trigger one can write. If we start this trigger, then the action sequence will be executed after each entity creation in the model space. |
<source lang="java"> | <source lang="java"> | ||
machine HelloTriggerWorld | machine HelloTriggerWorld | ||
{ | { | ||
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@Trigger(priority='100', mode='always', sensitivity='rise', startup='passive', execution='iterate') | @Trigger(priority='100', mode='always', sensitivity='rise', startup='passive', execution='iterate') | ||
gtrule testTrigger(inout E) = | gtrule testTrigger(inout E) = | ||
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{ | { | ||
println( "Trigger Action triggered by: " + E ); | println( "Trigger Action triggered by: " + E ); | ||
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} | } | ||
} | } | ||
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seq | seq | ||
{ | { | ||
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println ( startTrigger("testTrigger") ); | println ( startTrigger("testTrigger") ); | ||
} | } | ||
} | } | ||
</source> | </source> | ||
Revision as of 11:08, 2 July 2008
The following "hello world" trigger is actually the simplest trigger one can write. If we start this trigger, then the action sequence will be executed after each entity creation in the model space.
machine HelloTriggerWorld { @Trigger(priority='100', mode='always', sensitivity='rise', startup='passive', execution='iterate') gtrule testTrigger(inout E) = { // This pattern triggers the action sequence. precondition pattern lhs(E)= { entity(E); } // The action sequence. action { println( "Trigger Action triggered by: " + E ); } } //Main rule, the startTrigger() method invokes the engine. rule main() = seq { println ( startTrigger("testTrigger") ); } }