[GitHub] [flink] knaufk commented on a change in pull request #9192: [FLINK-12749] [docs] [examples] Initial Version of Flink Cluster Playground

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knaufk commented on a change in pull request #9192: [FLINK-12749] [docs] [examples] Initial Version of Flink Cluster Playground
URL: https://github.com/apache/flink/pull/9192#discussion_r308526422
 
 

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 File path: flink-examples/flink-examples-streaming/src/main/java/org/apache/flink/streaming/examples/windowing/clickeventcount/ClickEventCount.java
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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 org.apache.flink.streaming.examples.windowing.clickeventcount;
+
+import org.apache.flink.api.java.utils.ParameterTool;
+import org.apache.flink.streaming.api.TimeCharacteristic;
+import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
+import org.apache.flink.streaming.api.functions.timestamps.BoundedOutOfOrdernessTimestampExtractor;
+import org.apache.flink.streaming.api.windowing.time.Time;
+import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;
+import org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer;
+import org.apache.flink.streaming.examples.windowing.clickeventcount.functions.ClickEventStatisticsCollector;
+import org.apache.flink.streaming.examples.windowing.clickeventcount.functions.CountingAggregator;
+import org.apache.flink.streaming.examples.windowing.clickeventcount.records.ClickEvent;
+import org.apache.flink.streaming.examples.windowing.clickeventcount.records.ClickEventDeserializationSchema;
+import org.apache.flink.streaming.examples.windowing.clickeventcount.records.ClickEventStatistics;
+import org.apache.flink.streaming.examples.windowing.clickeventcount.records.ClickEventStatisticsSerializationSchema;
+
+import org.apache.kafka.clients.consumer.ConsumerConfig;
+import org.apache.kafka.clients.producer.ProducerConfig;
+
+import java.util.Properties;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * A simple streaming job reading {@link ClickEvent}s from Kafka, counting events per minute and
+ * writing the resulting {@link ClickEventStatistics} back to Kafka.
+ *
+ * <p> It can be run with or without checkpointing and with event time or processing time semantics.
+ * </p>
+ *
+ *
 
 Review comment:
   Good point. Done.

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