GeneratorEventFactory.java

/*
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 * distributed with this work for additional information
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 * 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
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 * See the License for the specific language governing permissions and
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 */

package org.apache.flink.test.windowing.sessionwindows;

/**
 * Factory that produces events of keyed session generators
 *
 * If types of generated events diverge more, we can consider also specify the input parameters to createEvent(...) as
 * a generic object type (containing all the data).
 *
 * @param <K> type of produced event key
 * @param <E> type of produced event
 */
public interface GeneratorEventFactory<K, E> {

	/**
	 * @param key             session key
	 * @param sessionId       session id
	 * @param eventId         event id w.r.t. the session
	 * @param eventTimestamp  event time
	 * @param globalWatermark current value of the global watermark
	 * @param timing          indicator for lateness
	 * @return event for an keyed event generator
	 */
	E createEvent(K key,
	              int sessionId,
	              int eventId,
	              long eventTimestamp,
	              long globalWatermark,
	              SessionEventGeneratorImpl.Timing timing);
}