How can I prevent Rapidminer from initializing multiple times?

daniel

Hello everyone,

First of all, thank you very much for this awesome software. I am working on my diploma thesis and I am integrating rapidminer into my application to validate my findings. So far I have been able to integrate the application just fine and I have to say the GUI works very well for designing the processes.

Here is my problem however. The project I am working on requires the software to be built with Maven. I have written test cases for each of my process wrappers for jUnit and they work great when I run them separately. However when I run the tests in chain during the maven build process I get a ton of AssertionErrors that, as far as I can tell, originate from the fact that jUnit creates a new instance of my wrapper in each test and as such tries to initialise rapidminer more than once.

I can not work around the limitation that jUnit tries to create new instances with each test. My question thus is: Is there a way to find out if rapidminer has already been initialized? I do keep track of it in my application but since each tests starts a new instance I would require a way to ask the RapidMiner process if it has already been initialized.

Below is the stack trace I get when the tests are run automatically.

Thanks in advance for your help,

Daniel

java.lang.AssertionError
	at com.rapidminer.io.process.rules.ChangeParameterValueRule.<init>(ChangeParameterValueRule.java:47)
	at com.rapidminer.io.process.XMLImporter.constructRuleFromElement(XMLImporter.java:198)
	at com.rapidminer.io.process.XMLImporter.importParseRules(XMLImporter.java:169)
	at com.rapidminer.io.process.XMLImporter.init(XMLImporter.java:125)
	at com.rapidminer.RapidMiner.init(RapidMiner.java:513)
	at my.application.processing.wrappers.rapidminer.AbstractRapidMinerWrapper.init(AbstractRapidMinerWrapper.java:213)
	at my.application.processing.wrappers.rapidminer.AbstractRapidMinerWrapper.runProcess(AbstractRapidMinerWrapper.java:253)
	at my.application.processing.wrappers.rapidminer.AbstractRapidMinerClusteringWrapper.apply(AbstractRapidMinerClusteringWrapper.java:88)
	at my.application.processing.wrappers.rapidminer.AbstractRapidMinerClusteringWrapper.apply(AbstractRapidMinerClusteringWrapper.java:68)
	at my.application.processing.wrappers.rapidminer.RMHACCompleteWrapper.process(RMHACCompleteWrapper.java:56)
	at my.application.processing.wrappers.rapidminer.RMHACCompleteWrapperTest.testClustering(RMHACCompleteWrapperTest.java:71)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
	at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:59)
	at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:120)
	at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:103)
	at org.apache.maven.surefire.Surefire.run(Surefire.java:169)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:350)
	at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1021)

MariusHelf

Hi Daniel, you can use com.rapidminer.test.TestContext.get().initRapidMiner()

TestContext is a singleton class with some convenience functions for testing.
There is also a class called RapidAssert which allows convinient comparison of ExampleSet and other IOObjects.

Please note that the test api is not stable and might change in the future (there are no changes planned currently, but you never know :-) )


Best, Marius