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[pulsar-flink] add streaming connectors as a Pulsar stream that seria…
…lizes data in Avro format (apache#3231) ### Motivation add Avro data format flink streaming connectors ### Modifications add class PulsarAvroTableSink ### Result add append-only table sink for serializes data in Avro format.
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120 changes: 120 additions & 0 deletions
120
...ink/streaming/connectors/pulsar/example/PulsarConsumerSourceWordCountToAvroTableSink.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.connectors.pulsar.example; | ||
|
|
||
| import org.apache.flink.api.common.functions.FlatMapFunction; | ||
| import org.apache.flink.api.common.functions.ReduceFunction; | ||
| import org.apache.flink.api.common.restartstrategy.RestartStrategies; | ||
| import org.apache.flink.api.common.serialization.SimpleStringSchema; | ||
| import org.apache.flink.api.java.utils.ParameterTool; | ||
| import org.apache.flink.avro.generated.WordWithCount; | ||
| import org.apache.flink.streaming.api.TimeCharacteristic; | ||
| 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.api.windowing.time.Time; | ||
| import org.apache.flink.streaming.connectors.pulsar.PulsarAvroTableSink; | ||
| import org.apache.flink.streaming.connectors.pulsar.PulsarSourceBuilder; | ||
| import org.apache.flink.table.api.Table; | ||
| import org.apache.flink.table.api.java.StreamTableEnvironment; | ||
| import org.apache.flink.table.sinks.CsvTableSink; | ||
| import org.apache.flink.table.sinks.TableSink; | ||
| import org.apache.pulsar.client.api.ProducerConfiguration; | ||
|
|
||
| /** | ||
| * Implements a streaming wordcount program on pulsar topics. | ||
| * | ||
| * <p>Example usage: | ||
| * --service-url pulsar://localhost:6650 --input-topic test_topic --subscription test_sub | ||
| */ | ||
| public class PulsarConsumerSourceWordCountToAvroTableSink { | ||
| private static final String SERVICE_URL = "pulsar://localhost:6650"; | ||
| private static final String ROUTING_KEY = "word"; | ||
|
|
||
| public static void main(String[] args) throws Exception { | ||
| // parse input arguments | ||
| final ParameterTool parameterTool = ParameterTool.fromArgs(args); | ||
|
|
||
| if (parameterTool.getNumberOfParameters() < 2) { | ||
| System.out.println("Missing parameters!"); | ||
| System.out.println("Usage: pulsar --service-url <pulsar-service-url> --input-topic <topic> --subscription <sub> --output-topic <topic>"); | ||
| return; | ||
| } | ||
|
|
||
| StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); | ||
| env.getConfig().disableSysoutLogging(); | ||
| env.getConfig().setRestartStrategy(RestartStrategies.fixedDelayRestart(4, 10000)); | ||
| env.enableCheckpointing(5000); | ||
| env.getConfig().setGlobalJobParameters(parameterTool); | ||
| env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime); | ||
|
|
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| StreamTableEnvironment tableEnvironment = StreamTableEnvironment.getTableEnvironment(env); | ||
|
|
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| String serviceUrl = parameterTool.getRequired("service-url"); | ||
| String inputTopic = parameterTool.getRequired("input-topic"); | ||
| String subscription = parameterTool.get("subscription", "flink-examples"); | ||
| String outputTopic = parameterTool.get("output-topic", null); | ||
| int parallelism = parameterTool.getInt("parallelism", 1); | ||
|
|
||
| System.out.println("Parameters:"); | ||
| System.out.println("\tServiceUrl:\t" + serviceUrl); | ||
| System.out.println("\tInputTopic:\t" + inputTopic); | ||
| System.out.println("\tSubscription:\t" + subscription); | ||
| System.out.println("\tOutputTopic:\t" + outputTopic); | ||
| System.out.println("\tParallelism:\t" + parallelism); | ||
|
|
||
| PulsarSourceBuilder<String> builder = PulsarSourceBuilder.builder(new SimpleStringSchema()) | ||
| .serviceUrl(serviceUrl) | ||
| .topic(inputTopic) | ||
| .subscriptionName(subscription); | ||
| SourceFunction<String> src = builder.build(); | ||
| DataStream<String> input = env.addSource(src); | ||
|
|
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|
|
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| DataStream<WordWithCount> wc = input | ||
| .flatMap((FlatMapFunction<String, WordWithCount>) (line, collector) -> { | ||
| for (String word : line.split("\\s")) { | ||
| collector.collect( | ||
| WordWithCount.newBuilder().setWord(word).setCount(1).build() | ||
| ); | ||
| } | ||
| }) | ||
| .returns(WordWithCount.class) | ||
| .keyBy("word") | ||
| .timeWindow(Time.seconds(5)) | ||
| .reduce((ReduceFunction<WordWithCount>) (c1, c2) -> | ||
| WordWithCount.newBuilder().setWord(c1.getWord()).setCount(c1.getCount() + c2.getCount()).build() | ||
| ); | ||
|
|
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| tableEnvironment.registerDataStream("wc",wc); | ||
|
|
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| Table table = tableEnvironment.sqlQuery("select * from wc"); | ||
| if (null != outputTopic) { | ||
| PulsarAvroTableSink sink = new PulsarAvroTableSink(SERVICE_URL, outputTopic, new ProducerConfiguration(), ROUTING_KEY,WordWithCount.class); | ||
| table.writeToSink(sink); | ||
| } else { | ||
| TableSink sink = new CsvTableSink("./examples/file", "|"); | ||
| // print the results with a csv file | ||
| table.writeToSink(sink); | ||
| } | ||
|
|
||
| env.execute("Pulsar Stream WordCount"); | ||
| } | ||
|
|
||
| } |
133 changes: 133 additions & 0 deletions
133
...ink/streaming/connectors/pulsar/example/PulsarConsumerSourceWordCountToJsonTableSink.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| /** | ||
| * 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.connectors.pulsar.example; | ||
|
|
||
| import lombok.AllArgsConstructor; | ||
| import lombok.NoArgsConstructor; | ||
| import lombok.ToString; | ||
| import org.apache.flink.api.common.functions.FlatMapFunction; | ||
| import org.apache.flink.api.common.functions.ReduceFunction; | ||
| import org.apache.flink.api.common.restartstrategy.RestartStrategies; | ||
| import org.apache.flink.api.common.serialization.SimpleStringSchema; | ||
| import org.apache.flink.api.java.utils.ParameterTool; | ||
| import org.apache.flink.streaming.api.TimeCharacteristic; | ||
| 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.api.windowing.time.Time; | ||
| import org.apache.flink.streaming.connectors.pulsar.PulsarJsonTableSink; | ||
| import org.apache.flink.streaming.connectors.pulsar.PulsarSourceBuilder; | ||
| import org.apache.flink.table.api.Table; | ||
| import org.apache.flink.table.api.java.StreamTableEnvironment; | ||
| import org.apache.flink.table.sinks.CsvTableSink; | ||
| import org.apache.flink.table.sinks.TableSink; | ||
| import org.apache.pulsar.client.api.ProducerConfiguration; | ||
|
|
||
| /** | ||
| * Implements a streaming wordcount program on pulsar topics. | ||
| * | ||
| * <p>Example usage: | ||
| * --service-url pulsar://localhost:6650 --input-topic test_topic --subscription test_sub | ||
| */ | ||
| public class PulsarConsumerSourceWordCountToJsonTableSink { | ||
| private static final String SERVICE_URL = "pulsar://localhost:6650"; | ||
| private static final String ROUTING_KEY = "word"; | ||
|
|
||
| public static void main(String[] args) throws Exception { | ||
| // parse input arguments | ||
| final ParameterTool parameterTool = ParameterTool.fromArgs(args); | ||
|
|
||
| if (parameterTool.getNumberOfParameters() < 2) { | ||
| System.out.println("Missing parameters!"); | ||
| System.out.println("Usage: pulsar --service-url <pulsar-service-url> --input-topic <topic> --subscription <sub> --output-topic <topic>"); | ||
| return; | ||
| } | ||
|
|
||
| StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); | ||
| env.getConfig().disableSysoutLogging(); | ||
| env.getConfig().setRestartStrategy(RestartStrategies.fixedDelayRestart(4, 10000)); | ||
| env.enableCheckpointing(5000); | ||
| env.getConfig().setGlobalJobParameters(parameterTool); | ||
| env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime); | ||
|
|
||
| StreamTableEnvironment tableEnvironment = StreamTableEnvironment.getTableEnvironment(env); | ||
|
|
||
| String serviceUrl = parameterTool.getRequired("service-url"); | ||
| String inputTopic = parameterTool.getRequired("input-topic"); | ||
| String subscription = parameterTool.get("subscription", "flink-examples"); | ||
| String outputTopic = parameterTool.get("output-topic", null); | ||
| int parallelism = parameterTool.getInt("parallelism", 1); | ||
|
|
||
| System.out.println("Parameters:"); | ||
| System.out.println("\tServiceUrl:\t" + serviceUrl); | ||
| System.out.println("\tInputTopic:\t" + inputTopic); | ||
| System.out.println("\tSubscription:\t" + subscription); | ||
| System.out.println("\tOutputTopic:\t" + outputTopic); | ||
| System.out.println("\tParallelism:\t" + parallelism); | ||
|
|
||
| PulsarSourceBuilder<String> builder = PulsarSourceBuilder.builder(new SimpleStringSchema()) | ||
| .serviceUrl(serviceUrl) | ||
| .topic(inputTopic) | ||
| .subscriptionName(subscription); | ||
| SourceFunction<String> src = builder.build(); | ||
| DataStream<String> input = env.addSource(src); | ||
|
|
||
|
|
||
| DataStream<WordWithCount> wc = input | ||
| .flatMap((FlatMapFunction<String, WordWithCount>) (line, collector) -> { | ||
| for (String word : line.split("\\s")) { | ||
| collector.collect( | ||
| new WordWithCount(word, 1) | ||
| ); | ||
| } | ||
| }) | ||
| .returns(WordWithCount.class) | ||
| .keyBy("word") | ||
| .timeWindow(Time.seconds(5)) | ||
| .reduce((ReduceFunction<WordWithCount>) (c1, c2) -> | ||
| new WordWithCount(c1.word, c1.count + c2.count)); | ||
|
|
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| tableEnvironment.registerDataStream("wc",wc); | ||
|
|
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| Table table = tableEnvironment.sqlQuery("select * from wc"); | ||
| if (null != outputTopic) { | ||
| PulsarJsonTableSink sink = new PulsarJsonTableSink(SERVICE_URL, outputTopic, new ProducerConfiguration(), ROUTING_KEY); | ||
| table.writeToSink(sink); | ||
| } else { | ||
| TableSink sink = new CsvTableSink("./examples/file", "|"); | ||
| // print the results with a csv file | ||
| table.writeToSink(sink); | ||
| } | ||
|
|
||
| env.execute("Pulsar Stream WordCount"); | ||
| } | ||
|
|
||
| /** | ||
| * Data type for words with count. | ||
| */ | ||
| @AllArgsConstructor | ||
| @NoArgsConstructor | ||
| @ToString | ||
| public static class WordWithCount { | ||
|
|
||
| public String word; | ||
| public long count; | ||
|
|
||
| } | ||
| } |
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