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package org.openjdk.jmc.rjmx.test.subscription;

import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;

import org.junit.Test;

import org.openjdk.jmc.rjmx.subscription.IMRISubscription;
import org.openjdk.jmc.rjmx.subscription.IMRIValueListener;
import org.openjdk.jmc.rjmx.subscription.MRI;
import org.openjdk.jmc.rjmx.subscription.MRIValueEvent;
import org.openjdk.jmc.rjmx.subscription.MRI.Type;
import org.openjdk.jmc.rjmx.test.RjmxTestCase;
import org.openjdk.jmc.rjmx.test.testutil.TestToolkit;

/**
 * Tests the automatic (synthetic) subscriptions on composite data.
 */
public class CompositeDataSubscriptionTest extends RjmxTestCase implements IMRIValueListener {
	private final static int SLEEP_TIME = 10000;

	/**
	 * @see org.openjdk.jmc.rjmx.subscription.IMRIValueListener#valueChanged(org.openjdk.jmc.rjmx.subscription.MRIValueEvent)
	 */
	@Override
	public void valueChanged(MRIValueEvent event) {
		TestToolkit.println(event);
		synchronized (this) {
			notifyAll();
		}
	}

	@Test
	public void testCompositeDataSubscription() {
		try {
			// Starting up a subscription on a one shot attribute.
			MRI attributeDescriptor = new MRI(Type.ATTRIBUTE, "java.lang:type=Memory",
					"HeapMemoryUsage/used");
			getAttributeSubscriptionService().addMRIValueListener(attributeDescriptor, this);
			IMRISubscription subscription = getAttributeSubscriptionService().getMRISubscription(attributeDescriptor);

			assertNotNull(subscription);

			synchronized (this) {
				this.wait(SLEEP_TIME);
			}
			assertNotNull(getAttributeSubscriptionService().getLastMRIValueEvent(attributeDescriptor));
			getAttributeSubscriptionService().removeMRIValueListener(this);
		} catch (Exception e) {
			e.printStackTrace();
			fail(e.getMessage());
		}
	}
}