2010-09-17 Francois Chouinard <fchouinard@gmail.com> Contribution for Bug325662

[deliverable/tracecompass.git] / org.eclipse.linuxtools.tmf.tests / stubs / org / eclipse / linuxtools / tmf / component / TmfSyntheticEventProviderStub.java

/*******************************************************************************
 * Copyright (c) 2009, 2010 Ericsson
 * 
 * All rights reserved. This program and the accompanying materials are
 * made available under the terms of the Eclipse Public License v1.0 which
 * accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *   Francois Chouinard - Initial API and implementation
 *******************************************************************************/

package org.eclipse.linuxtools.tmf.component;

import java.util.concurrent.TimeUnit;

import org.eclipse.linuxtools.tmf.event.TmfEvent;
import org.eclipse.linuxtools.tmf.event.TmfSyntheticEventStub;
import org.eclipse.linuxtools.tmf.event.TmfTimeRange;
import org.eclipse.linuxtools.tmf.request.ITmfDataRequest;
import org.eclipse.linuxtools.tmf.request.ITmfEventRequest;
import org.eclipse.linuxtools.tmf.request.TmfEventRequest;
import org.eclipse.linuxtools.tmf.trace.ITmfContext;
import org.eclipse.linuxtools.tmf.trace.TmfContext;

/**
 * <b><u>TmfSyntheticEventProviderStub</u></b>
 * <p>
 * TODO: Implement me. Please.
 */
public class TmfSyntheticEventProviderStub extends TmfEventProvider<TmfSyntheticEventStub> {

    public static final int BLOCK_SIZE = 100;
    public static final int NB_EVENTS  = 1000;

    public TmfSyntheticEventProviderStub() {
		super("TmfSyntheticEventProviderStub", TmfSyntheticEventStub.class);
	}

	@SuppressWarnings("unchecked")
	@Override
	public ITmfContext armRequest(final ITmfDataRequest<TmfSyntheticEventStub> request) {

		// Get the TmfSyntheticEventStub provider
		ITmfDataProvider<TmfEvent>[] eventProviders = (ITmfDataProvider<TmfEvent>[]) TmfProviderManager.getProviders(TmfEvent.class, TmfEventProviderStub.class);
		ITmfDataProvider<TmfEvent> provider = eventProviders[0];

		// make sure we have the right type of request
		if (!(request instanceof ITmfEventRequest<?>)) {
			request.cancel();
			return null;
		}

		TmfEventRequest<TmfSyntheticEventStub> eventRequest = (TmfEventRequest<TmfSyntheticEventStub>) request;
        TmfTimeRange range = eventRequest.getRange();
        final TmfEventRequest<TmfEvent> subRequest =
        	new TmfEventRequest<TmfEvent>(TmfEvent.class, range, NB_EVENTS, BLOCK_SIZE) {
        		@Override
        		public void handleData(TmfEvent event) {
            		super.handleData(event);
        			if (event != null)
        				handleIncomingData(event);
        			else
        				request.done();
        		}
        	};
        provider.sendRequest(subRequest);

        // Return a dummy context
        return new TmfContext();
	}

	// Queue 2 synthetic events per base event
	private void handleIncomingData(TmfEvent e) {
		queueResult(new TmfSyntheticEventStub(e));
		queueResult(new TmfSyntheticEventStub(e));
	}

	private static final int TIMEOUT = 10000;

	@Override
	public TmfSyntheticEventStub getNext(ITmfContext context) {
		TmfSyntheticEventStub data = null;
		try {
			data = fDataQueue.poll(TIMEOUT, TimeUnit.MILLISECONDS);
			if (data == null) {
				throw new InterruptedException();
			}
		}
		catch (InterruptedException e) {
		}
		return data;
	}

	public void queueResult(TmfSyntheticEventStub data) {
		boolean ok = false;
		try {
			ok = fDataQueue.offer(data, TIMEOUT, TimeUnit.MILLISECONDS);
			if (!ok) {
				throw new InterruptedException();
			}
		}
		catch (InterruptedException e) {
		}
	}

}