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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 dstream.examples;

import java.util.Map.Entry;
import java.util.concurrent.Future;
import java.util.stream.Stream;

import io.dstream.DStream;
import io.dstream.utils.ExecutionResultUtils;

/**
 * A quintessential WordCount
 *
 */
public class WordCount {

	public static void main(String[] args) throws Exception {
		
		Future>>> resultFuture = DStream.ofType(String.class, "wc")
				.flatMap(line -> Stream.of(line.split("\\s+")))
				.reduceValues(word -> word, word -> 1, Integer::sum)
			.executeAs("WordCount");
		
		// each stream within a stream represents a partition essentially giving you access to each result partition
		Stream>> resultPartitionsStream = resultFuture.get();
		ExecutionResultUtils.printResults(resultPartitionsStream, true);
		resultPartitionsStream.close();
	}
}