Add QueryPerformanceTest to the plugin skeleton

[benedekh]

The PR closes #32.

There are three changes in viatra.QueryPerformanceTest in comparison with its origin.

1. In line 63 a constructor for QueryPerformanceData had to be implemented, because Xtend was complaining for missing constructor.

Two additional changes were made due to the fact that in MagicDraw it is advised to use V4MD to construct the Viatra engine:

1. def QueryScope getScope() is replaced by def AdvancedViatraQueryEngine getEngine().

2. queryEngine = AdvancedViatraQueryEngine.createUnmanagedEngine(preparedScope, getEngineOptions()) is replaced by queryEngine = engine.

QueryPerformanceTestAdapter is implemented as an adapter that creates the Viatra Engine by getting it from V4MD. Moreover it extends RelativeQueryPerformanceTest so that it can run the measurement.

Last but not least, QueryPerformanceTest is responsible for loading the project and calling the adapter to start the measurement on the project.

Please let me know if you have any feedback about this contribution.

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One technical debt which might be a no-go: in order to make the PR work, you have to re-enable guava in the plugin skeleton. Otherwise you will get a NoClassDefFoundError when running the runTest gradle job.

In order to discuss the problem, the PR does not contain any changes in build.gradle yet.

2020-03-26 22:52:45,965 [main] ERROR PLUGINS - Can not start plugin IncQuery Labs MagicDraw Plugin Example
java.lang.NoClassDefFoundError: com/google/common/collect/Lists
	at org.eclipse.xtext.service.CompoundModule.<init>(CompoundModule.java:28)
	at org.eclipse.xtext.service.AbstractGenericModule.getBindings(AbstractGenericModule.java:38)
	at org.eclipse.xtext.service.AbstractGenericModule.configure(AbstractGenericModule.java:32)
	at org.eclipse.xtext.service.DefaultRuntimeModule.configure(DefaultRuntimeModule.java:76)
	at org.eclipse.viatra.query.patternlanguage.emf.AbstractEMFPatternLanguageRuntimeModule.configure(AbstractEMFPatternLanguageRuntimeModule.java:85)
	at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)
	at com.google.inject.spi.Elements.getElements(Elements.java:101)
	at com.google.inject.internal.InjectorShell$Builder.build(InjectorShell.java:133)
	at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:103)
	at com.google.inject.Guice.createInjector(Guice.java:95)
	at com.google.inject.Guice.createInjector(Guice.java:72)
	at com.google.inject.Guice.createInjector(Guice.java:62)
	at com.incquerylabs.magicdraw.plugin.example.ExamplePlugin.init(ExamplePlugin.java:43)
	at com.nomagic.magicdraw.plugins.g.b(g.java:690)
	at com.nomagic.magicdraw.plugins.g.a(g.java:533)
	at com.nomagic.magicdraw.plugins.g.C(g.java:463)
	at com.nomagic.magicdraw.core.l.t(l.java:45)
	at com.nomagic.rcpf.product.q.a(q.java:277)
	at com.nomagic.rcpf.product.k.a(k.java:93)
	at com.nomagic.rcpf.product.k.b(k.java:77)
	at com.nomagic.magicdraw.core.Application.internalStart(Application.java:683)
	at com.nomagic.magicdraw.core.Application.start(Application.java:447)
	at com.nomagic.magicdraw.commandline.CommandLineActionLauncher.launch(CommandLineActionLauncher.java:29)
	at com.nomagic.magicdraw.ApplicationGateway.start(ApplicationGateway.java:46)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
	at com.nomagic.osgi.launcher.FrameworkLauncher$DefaultApplication.run(FrameworkLauncher.java:227)
	at com.nomagic.osgi.launcher.FrameworkLauncher.runFrameworkApplication(FrameworkLauncher.java:177)
	at com.nomagic.osgi.launcher.FrameworkLauncher.run(FrameworkLauncher.java:114)
	at com.nomagic.osgi.launcher.FrameworkLauncher.run(FrameworkLauncher.java:93)
	at com.nomagic.osgi.launcher.ProductionFrameworkLauncher.run(ProductionFrameworkLauncher.java:66)
	at com.nomagic.osgi.launcher.ProductionFrameworkLauncher.main(ProductionFrameworkLauncher.java:53)
Caused by: java.lang.ClassNotFoundException: com.google.common.collect.Lists
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	at com.nomagic.magicdraw.plugins.h.loadClass(h.java:41)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	... 34 more

[ujhelyiz]

I'd rewrite the test QueryPerformanceTest and RelativeQueryPerformanceTest classes to Java and manually remove all Guava dependencies. As a starting point, you can rely on the generated classes from xtend-gen - that would simplify handling Guava greatly.

[benedekh]

@ujhelyiz: I have reimplemented both QueryPerformanceTest and RelativeQueryPerformanceTest in pure Java to get rid of any Guava dependencies they might have. The new implmenetation is 1:1 equivalent with the old one. However, I had to replace Stopwatch by StopWatch from Apache, because the former one came from the Guava library.

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As far as the Exception above is concerned, its entry point is line 43 in ExamplePlugin. If we put this and the following lines in comment, then the runTest gradle job is executed successfully.