/* * 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 com.grallandco.demos; import org.apache.flink.api.common.functions.MapFunction; import org.apache.flink.streaming.api.datastream.DataStream; import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer09; import org.apache.flink.streaming.util.serialization.SimpleStringSchema; import java.util.Properties; public class ReadFromKafka { public static void main(String[] args) throws Exception { // create execution environment StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); Properties properties = new Properties(); properties.setProperty("bootstrap.servers", "localhost:9092"); properties.setProperty("group.id", "flink_consumer"); DataStream<String> stream = env .addSource(new FlinkKafkaConsumer09<>("flink-demo", new SimpleStringSchema(), properties)); stream.map(new MapFunction<String, String>() { private static final long serialVersionUID = -6867736771747690202L; @Override public String map(String value) throws Exception { return "Stream Value: " + value; } }).print(); env.execute(); } }