library/src/test/java/com/datatorrent/lib/stream/DevNullCounterTest.java

/*
 * Copyright (c) 2013 DataTorrent, Inc. ALL Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.datatorrent.lib.stream;

import com.datatorrent.lib.stream.DevNullCounter;
import com.datatorrent.lib.testbench.EventGenerator;

import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 * Functional tests for {@link com.datatorrent.lib.testbench.DevNullCounter}.
 * <p>
 * <br>
 * oper.process is called a billion times<br>
 * With extremely high throughput it does not impact the performance of any
 * other oper <br>
 * Benchmarks:<br>
 * Object payload benchmarked at over 125 Million/sec <br>
 * DRC checks are validated<br>
 * 
 */
public class DevNullCounterTest
{

	private static Logger LOG = LoggerFactory.getLogger(EventGenerator.class);

	/**
	 * Tests both string and non string schema
	 */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	@Test
	public void testSingleSchemaNodeProcessing() throws Exception
	{
		DevNullCounter oper = new DevNullCounter();
		oper.setRollingwindowcount(5);
		oper.setup(null);

		oper.beginWindow(0);
		long numtuples = 1000000;
		Object o = new Object();
		for (long i = 0; i < numtuples; i++) {
			oper.data.process(o);
		}
		oper.endWindow();
		LOG.info(String
				.format(
						"\n*******************************************************\nnumtuples(%d)",
						numtuples));
	}
}