samoa-flink/src/main/java/org/apache/samoa/flink/topology/impl/FlinkComponentFactory.java

/*
 * 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.samoa.flink.topology.impl;

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.samoa.core.EntranceProcessor;
import org.apache.samoa.core.Processor;
import org.apache.samoa.topology.*;

/**
 * An implementation of SAMOA's ComponentFactory for Apache Flink
 */
public class FlinkComponentFactory implements ComponentFactory {

	private StreamExecutionEnvironment env;

	public FlinkComponentFactory(StreamExecutionEnvironment env) {
		this.env = env;
	}

	@Override
	public ProcessingItem createPi(Processor processor) {
		return new FlinkProcessingItem(env, processor);
	}

	@Override
	public ProcessingItem createPi(Processor processor, int parallelism) {
		return new FlinkProcessingItem(env, processor, parallelism);
	}

	@Override
	public EntranceProcessingItem createEntrancePi(EntranceProcessor entranceProcessor) {
		return new FlinkEntranceProcessingItem(env, entranceProcessor);
	}

	@Override
	public Stream createStream(IProcessingItem sourcePi) {
		if (sourcePi instanceof FlinkProcessingItem)
			return ((FlinkProcessingItem) sourcePi).createStream();
		else return new FlinkStream((FlinkComponent) sourcePi);
	}

	@Override
	public Topology createTopology(String topologyName) {
		return new FlinkTopology(topologyName, env);
	}
}