/*
 * 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 org.apache.flink.streaming.api.environment;

import org.apache.flink.api.common.functions.FilterFunction;
import org.apache.flink.streaming.api.datastream.DataStream;

import org.apache.flink.util.TestLogger;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

@SuppressWarnings("serial")
public class LocalStreamEnvironmentITCase extends TestLogger {

	/**
	 * Test test verifies that the execution environment can be used to execute a
	 * single job with multiple slots.
	 */
	@Test
	public void testRunIsolatedJob() throws Exception {
		Flip6LocalStreamEnvironment env = new Flip6LocalStreamEnvironment();
		assertEquals(1, env.getParallelism());

		addSmallBoundedJob(env, 3);
		env.execute();
	}

	/**
	 * Test test verifies that the execution environment can be used to execute multiple
	 * bounded streaming jobs after one another.
	 */
	@Test
	public void testMultipleJobsAfterAnother() throws Exception {
		Flip6LocalStreamEnvironment env = new Flip6LocalStreamEnvironment();

		addSmallBoundedJob(env, 3);
		env.execute();

		addSmallBoundedJob(env, 5);
		env.execute();
	}

	// ------------------------------------------------------------------------

	private static void addSmallBoundedJob(StreamExecutionEnvironment env, int parallelism) {
		DataStream<Long> stream = env
				.generateSequence(1, 100)
					.setParallelism(parallelism)
					.slotSharingGroup("group_1");

		stream
				.filter(new FilterFunction<Long>() {
					@Override
					public boolean filter(Long value) {
						return false;
					}
				})
					.setParallelism(parallelism)
					.startNewChain()
					.slotSharingGroup("group_2")

				.print()
					.setParallelism(parallelism);
	}
}