/* * 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.streaming.api.datastream.DataStream; import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; import org.apache.flink.streaming.api.functions.source.SourceFunction; import org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer09; import org.apache.flink.streaming.util.serialization.SimpleStringSchema; import java.util.Properties; public class WriteToKafka { public static void main(String[] args) throws Exception { StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); Properties properties = new Properties(); properties.setProperty("bootstrap.servers", "localhost:9092"); DataStream<String> stream = env.addSource(new SimpleStringGenerator()); stream.addSink(new FlinkKafkaProducer09<>("flink-demo", new SimpleStringSchema(), properties)); env.execute(); } /** * Simple Class to generate data */ public static class SimpleStringGenerator implements SourceFunction<String> { private static final long serialVersionUID = 119007289730474249L; boolean running = true; long i = 0; @Override public void run(SourceContext<String> ctx) throws Exception { while(running) { ctx.collect("FLINK-"+ (i++)); Thread.sleep(10); } } @Override public void cancel() { running = false; } } }