| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.hadoop.hbase.kafka; |
| |
| import java.time.Duration; |
| import java.util.Arrays; |
| import java.util.Iterator; |
| import java.util.Properties; |
| import java.util.stream.Collectors; |
| |
| import org.apache.avro.io.BinaryDecoder; |
| import org.apache.avro.io.DecoderFactory; |
| import org.apache.avro.specific.SpecificDatumReader; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.hadoop.hbase.util.VersionInfo; |
| |
| import org.apache.kafka.clients.consumer.ConsumerRecord; |
| import org.apache.kafka.clients.consumer.ConsumerRecords; |
| import org.apache.kafka.clients.consumer.KafkaConsumer; |
| import org.apache.kafka.common.serialization.ByteArrayDeserializer; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine; |
| import org.apache.hbase.thirdparty.org.apache.commons.cli.DefaultParser; |
| import org.apache.hbase.thirdparty.org.apache.commons.cli.HelpFormatter; |
| import org.apache.hbase.thirdparty.org.apache.commons.cli.Options; |
| import org.apache.hbase.thirdparty.org.apache.commons.cli.ParseException; |
| |
| /** |
| * connects to kafka and reads from the passed in topics. Parses each message into an avro object |
| * and dumps it to the console. |
| */ |
| @InterfaceAudience.Private |
| public final class DumpToStringListener { |
| private static final Logger LOG = LoggerFactory.getLogger(DumpToStringListener.class); |
| |
| private DumpToStringListener(){ |
| } |
| |
| public static void main(String[] args) { |
| LOG.info("***** STARTING service '" + DumpToStringListener.class.getSimpleName() + "' *****"); |
| VersionInfo.logVersion(); |
| |
| Options options = new Options(); |
| options.addRequiredOption("k", "kafkabrokers", true, "Kafka Brokers " + |
| "(comma delimited)"); |
| options.addRequiredOption("t", "kafkatopics", true,"Kafka Topics " |
| + "to subscribe to (comma delimited)"); |
| CommandLine commandLine = null; |
| |
| try { |
| commandLine = new DefaultParser().parse(options, args); |
| } catch (ParseException e) { |
| LOG.error("Could not parse: ", e); |
| printUsageAndExit(options, -1); |
| } |
| |
| SpecificDatumReader<HBaseKafkaEvent> dreader = |
| new SpecificDatumReader<>(HBaseKafkaEvent.SCHEMA$); |
| |
| String topic = commandLine.getOptionValue('t'); |
| Properties props = new Properties(); |
| props.put("bootstrap.servers", commandLine.getOptionValue('k')); |
| props.put("group.id", "hbase kafka test tool"); |
| props.put("key.deserializer", ByteArrayDeserializer.class.getName()); |
| props.put("value.deserializer", ByteArrayDeserializer.class.getName()); |
| |
| try (KafkaConsumer<byte[], byte[]> consumer = new KafkaConsumer<>(props)) { |
| consumer.subscribe(Arrays.stream(topic.split(",")).collect(Collectors.toList())); |
| |
| while (true) { |
| ConsumerRecords<byte[], byte[]> records = consumer.poll(Duration.ofMillis(10000)); |
| Iterator<ConsumerRecord<byte[], byte[]>> it = records.iterator(); |
| while (it.hasNext()) { |
| ConsumerRecord<byte[], byte[]> record = it.next(); |
| BinaryDecoder decoder = DecoderFactory.get().binaryDecoder(record.value(), null); |
| try { |
| HBaseKafkaEvent event = dreader.read(null, decoder); |
| LOG.debug("key :" + Bytes.toString(record.key()) + " value " + event); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| } |
| } |
| |
| private static void printUsageAndExit(Options options, int exitCode) { |
| HelpFormatter formatter = new HelpFormatter(); |
| formatter.printHelp("hbase " + DumpToStringListener.class.getName(), "", options, |
| "\n[--kafkabrokers <kafka brokers (comma delmited)>] " + |
| "[-k <kafka brokers (comma delmited)>] \n", true); |
| System.exit(exitCode); |
| } |
| } |