IdStory Identity Manager

package eu.bcvsolutions.idm.core.script;

import org.junit.Test;

import groovy.lang.ExpandoMetaClass;

import groovy.lang.GroovyClassLoader;

import groovy.lang.GroovySystem;

import groovy.lang.MetaClass;

import groovy.lang.MetaClassRegistry;

public class GroovyScriptTest {

	@Test

	public void testForLeak() throws Exception {

		for (int i = 1; i <= 10000; i++) {

			GroovyClassLoader classLoader = new GroovyClassLoader(Thread.currentThread().getContextClassLoader());

			Class<?> clazz = classLoader.parseClass("print 'hello world'");

			ExpandoMetaClass metaClass = getExpandoMetaClass(clazz);

			System.gc();

			Thread.sleep(50);

			System.out.println("Done " + i + " iterations");

		}

	}

	// --Begin copied unmodified from GrailsMetaClassUtils--//

	public static ExpandoMetaClass getExpandoMetaClass(Class<?> aClass) {

		MetaClassRegistry registry = getRegistry();

		MetaClass mc = registry.getMetaClass(aClass);

		if (mc instanceof ExpandoMetaClass) {

			ExpandoMetaClass emc = (ExpandoMetaClass) mc;

			registry.setMetaClass(aClass, emc); // make permanent

			return emc;

		}

		registry.removeMetaClass(aClass);

		mc = registry.getMetaClass(aClass);

		if (mc instanceof ExpandoMetaClass) {

			return (ExpandoMetaClass) mc;

		}

		ExpandoMetaClass emc = new ExpandoMetaClass(aClass, true, true);

		emc.initialize();

		registry.setMetaClass(aClass, emc);

		return emc;

	}

	public static MetaClassRegistry getRegistry() {

		return GroovySystem.getMetaClassRegistry();

	}

	// --End copied unmodified from GrailsMetaClassUtils--//

}