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  1. 以下是一个简单的 Flink Sink 到 Hudi 的 Demo 示例:

    import org.apache.flink.api.common.functions.MapFunction;import org.apache.flink.api.java.ExecutionEnvironment;import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;import org.apache.flink.table.api.Table;import org.apache.flink.table.api.TableResult;import org.apache.flink.table.api.bridge.java.BatchTableEnvironment;import org.apache.hudi.configuration.FlinkOptions;import org.apache.hudi.streamer.FlinkStreamer;import org.apache.hudi.streamer.FlinkStreamerConfig;import org.apache.hudi.streamer.Operation;import org.apache.flink.table.api.EnvironmentSettings;public class FlinkHudiDemo {    public static void main(String[] args) throws Exception {        // 定义 Flink Execution Environment        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();        // 定义 StreamTableEnvironment        EnvironmentSettings settings = EnvironmentSettings.newInstance().inStreamingMode().build();        StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env, settings);        // 定义测试数据        String[] input = new String[]{"id-1,John,26,Male", "id-2,Doe,30,Male"};        // 构造测试数据,转换为 Table 类型        Table inputTable = env.fromElements(input)            .map((MapFunction) value -> {                String[] values = value.split(",");                return Row.of(values[0], values[1], Integer.parseInt(values[2]), values[3]);            })            .toTable(tableEnv, DataTypes.ROW(DataTypes.FIELD("id", DataTypes.STRING()),                DataTypes.FIELD("name", DataTypes.STRING()),                DataTypes.FIELD("age", DataTypes.INT()),                DataTypes.FIELD("gender", DataTypes.STRING())));        // 定义 Hudi 配置参数        BatchWriteConfig hoodieCfg = HoodieWriteConfig.newBuilder().withPath("hdfs://your_hdfs_path")            .withSchema(HoodieAvroSchemaConverter.convertToStructType(schema)).build();        // 定义 Flink save point 路径        String savepointPath = "hdfs://your_savepoint_path";        // 定义 Flink Streamer 配置参数        FlinkStreamerConfig cfg = FlinkStreamerConfig.builder()            .withOperation(Operation.UPSERT)            .withTable("test_table")            .withTargetBasePath("hdfs://your_target_path")            .withWriteDefaults(false)            .withSchema(KafkaJsonSerDeUtils.generateSchema(objectMapper, schema).toString())            .withKeyGeneratorClass("org.apache.hudi.keygen.SimpleKeyGenerator")            .withHoodieConfigs(hoodieCfg.getProps())            .withCheckpointInterval(1000 * 10) // 设置checkpoint 间隔时间            .withPrecombineField("id")            .withRowKey("id")            .withMetricsPrefix("test")            .withTransformerClass("org.apache.hudi.utilities.transform.SqlQueryBasedTransformer")            .withTransformConfigPath("path/to/configs")            .withBootstrapBasePath("hdfs://your_bootstrap_path")            .withFilterDupes(false)            .withSavePointPath(savepointPath)            .build();        // 将数据写入到 Hudi 表中        FlinkStreamer streamer = new FlinkStreamer(cfg, env);        streamer.sync();        // 执行 flink 程序        env.execute("FlinkHudiDemo");    }}
  2. 是的,Flink 提供了将数据流推送到 Hudi 的功能,并且提供了对应的 sink。以下是一个简单的 Flink Sink 到 Hudi 的示例,供您参考:

    DataStream> dataStream = ...; // 从某个数据源获取一个流StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env); // 创建一个流表环境Table table = tableEnv.fromDataStream(dataStream, "id,name,age"); // 将数据流转换为 TabletableEnv.createTemporaryView("temp_table", table); HoodieConfig hoodieConfig = HoodieWriterConfig.newBuilder()    .withPath("path/to/hudi/table")    .withPreCombineField("timestamp")    .withSchema(TABLE_SCHEMA)    .withParallelism(1)    .forTable(TABLE_NAME)    .build();HoodieFlinkTableSink sink = new HoodieFlinkTableSink(hoodieConfig, LIMITED_CONCURRENT_REQUESTS, 3);tableEnv.registerTableSink("hudi_sink", new String[]{"id","name","age"}, new TypeInformation[]{Types.STRING, Types.STRING, Types.INT}, sink);tableEnv.sqlUpdate("insert into hudi_sink select id, name, age from temp_table"); // 执行插入操作 

    在这个示例中,我们首先使用 StreamTableEnvironment 创建一个流表环境,将 DataStream 转换为 Table 并注册为临时表。接下来,我们创建了一个 HoodieConfig 对象并使用它实例化了一个 HoodieFlinkTableSink 对象,最后将其注册为表格 “hudi_sink”。我们还通过将 temp_table 插入 hudi_sink 表格来执行 Hudi Sink 操作。

    需要注意的是,示例中的代码片段只是一个简单的示例,并不是完整的可运行程序。您需要根据实际情况进行适当的修改,并根据您选择的 Hudi 版本添加相应的依赖关系。

  3. 下面是一个简单的示例,在Flink中使用Hudi Sink将数据写入到Hudi的表中。 首先,需要引入相关的依赖:

      org.apache.hudi  hudi-flink  0.8.0  org.apache.flink  flink-streaming-java_2.11  1.13.1  org.apache.flink  flink-clients_2.11  1.13.1

    接下来,可以使用以下示例代码:

    import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;import org.apache.flink.streaming.api.functions.source.SourceFunction;import org.apache.flink.streaming.api.functions.sink.SinkFunction;import org.apache.flink.streaming.api.datastream.DataStream;import org.apache.flink.streaming.api.TimeCharacteristic;import org.apache.hudi.flink.HoodieFlinkWriteConfig;import org.apache.hudi.flink.HoodieWriteConfig;import org.apache.hudi.flink.HoodieWriteHandle;import org.apache.hudi.flink.HoodieFlinkTableSink;import org.apache.hudi.flink.HoodieFlinkTableFactory;import org.apache.hudi.hadoop.config.HoodieWriteConfig;import org.apache.hadoop.conf.Configuration;import java.util.Properties;import org.apache.hudi.common.model.HoodieTableType;import org.apache.hudi.configuration.FlinkOptions;import org.apache.hudi.exception.HoodieException;import java.io.IOException;public class FlinkHudiSinkDemo {    public static void main(String[] args) throws Exception {        // 创建Flink执行环境        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();        env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);        env.setParallelism(1);        // 定义输入流        DataStream input = env.addSource(new MySourceFunction());        // 定义Hudi Sink        HoodieFlinkWriteConfig writeConfig = makeConfig();        HoodieFlinkTableSink sink = (HoodieFlinkTableSink) HoodieFlinkTableFactory.create(                // 设置生成Hudi表的路径和名称                "./path/to/hudi/table",                // 设置表类型为COPY_ON_WRITE或MERGE_ON_READ                HoodieTableType.COPY_ON_WRITE,                 // 设置write配置                writeConfig);        input.addSink(sink);        // 执行任务        env.execute("Flink Hudi Sink Demo");    }    private static HoodieFlinkWriteConfig makeConfig() {        Properties props = new Properties();        // 设置Hadoop配置(如DFS配置)        Configuration hadoopConf = new Configuration();        props.put(FlinkOptions.HADOOP_CONF, hadoopConf);        // 设置表类型        props.put(FlinkOptions.TABLE_TYPE, HoodieTableType.COPY_ON_WRITE.name());        // 设置写入模式        props.put(HoodieWriteConfig.WRITE_OPERATION_OPT_KEY(), HoodieWriteConfig.INSERT_OPERATION);                // 设置写入批次大小        props.put(HoodieWriteConfig.BULK_INSERT_BATCH_SIZE_OPT_KEY(), "1000");                // 设置日期时间格式        props.put(FlinkOptions.WRITE_DATE_FORMAT, "yyyyMMdd");        // 设置表名称        props.put(FlinkOptions.TABLE_NAME, "hudi_test");        // 构造Hoodie Flink写入配置对象        HoodieFlinkWriteConfig writeConfig = HoodieFlinkWriteConfig.newBuilder()                .withSchema("")                .withProps(props)                .withParallelism(1)                .withBulkInsertParallelism(1)                .build();        return writeConfig;    }    private static final class MySourceFunction implements SourceFunction {        private volatile boolean isRunning = true;        @Override        public void run(SourceContext ctx) throws Exception {            // 读取数据源            while (isRunning) {                String message = null; // 读取数据                if (message != null) {                    ctx.collect(message);                }            }        }        @Override        public void cancel() {            isRunning = false;        }    }}

  4. 以下是一个Flink Sink到Hudi的demo:

    import org.apache.flink.api.common.functions.FlatMapFunction;import org.apache.flink.api.common.functions.RichMapFunction;import org.apache.flink.api.common.serialization.SimpleStringSchema;import org.apache.flink.configuration.Configuration;import org.apache.flink.streaming.api.TimeCharacteristic;import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;import org.apache.flink.streaming.api.functions.AssignerWithPeriodicWatermarks;import org.apache.flink.streaming.api.watermark.Watermark;import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;import org.apache.flink.util.Collector;import org.apache.hadoop.fs.Path;import org.apache.hudi.DataSourceUtils;import org.apache.hudi.DataSourceWriteOptions;import org.apache.hudi.HoodieFlinkWriteableTable;import org.apache.hudi.WriteStatus;import org.apache.hudi.common.model.HoodieTableType;import org.apache.hudi.common.util.FSUtils;import org.apache.hudi.config.HoodieWriteConfig;import org.apache.hudi.hadoop.config.HoodieBootstrapConfig;import org.apache.hudi.hadoop.config.HoodieRealtimeConfig;import org.apache.hudi.utilities.HoodieFlinkStreamer;import org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer;import org.apache.hudi.utilities.sources.JsonKafkaSource;import java.sql.Timestamp;import java.util.List;import java.util.Properties;public class FlinkSinkToHudiDemo {    public static void main(String[] args) throws Exception {        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();        env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);        env.enableCheckpointing(5000);        Properties props = new Properties();        props.setProperty("bootstrap.servers", "localhost:9092");        props.setProperty("group.id", "test");        FlinkKafkaConsumer<String> consumer = new FlinkKafkaConsumer<>("test", new SimpleStringSchema(), props);        env.addSource(consumer)                .flatMap(new FlatMapFunction<String, String>() {                    @Override                    public void flatMap(String s, Collector<String> collector) throws Exception {                        collector.collect(s);                    }                })                .map(new RichMapFunction<String, WriteStatus>() {                    private HoodieFlinkWriteableTable hoodieTable;                    private HoodieWriteConfig config;                    @Override                    public void open(Configuration parameters) throws Exception {                        super.open(parameters);                        String basePath = "/tmp/flinkSinkToHudiDemo";                        List<String> partitions = FSUtils.getAllPartitionPaths(hadoopConf, new Path(basePath + "/*/*/*/*"));                        config = HoodieWriteConfig.newBuilder()                                .withAvroSchemaValidate(false)                                .withPath(basePath)                                .withSchema(DataSourceUtils.getSchemaFromJsonString("{"name":"id", "type":"string"}," +                                        "{"name":"time", "type":"timestamp"}"))                                .withParallelism(1)                                .forTable("test")                                .withPreCombineField("time")                                .withBulkInsertParallelism(1)                                .withFinalizeWriteParallelism(1)                                .withWriteStatusClass(WriteStatus.class)                                .withCompactionConfig(HoodieWriteConfig.CompactionConfig.newBuilder()                                        .withAutoClean(false)                                        .withInlineCompaction(false)                                        .withMaxNumDeltaCommitsBeforeCompaction(10)                                        .withMinNumRecordsInFile(100)                                        .build())                                .withDataSourceWriteOptions(                                        DataSourceWriteOptions.<String>builder().withBootstrapIndexClass("org.apache.hudi.bootstrap.ZkBootstrapIndex")                                                .withBootstrapKeyGeneratorClass("org.apache.hudi.keygen.NonpartitionedKeyGenerator")                                                .withInsertShuffleParallelism(1)                                                .withUseInsertOverwrite(false)                                                .withUseUpsert(true)                                                .withViewStorageConfig(HoodieWriteConfig.ViewStorageConfig.newBuilder().withEnable(true)                                                        .withHFileFormatConfig(HoodieWriteConfig.HFileFormatConfig.newBuilder()                                                                .withFileExtension("hfile").build())                                                        .withProps(HoodieFlinkStreamer.Config.HOODIE_EXTRACTOR_REGEX_PATTERN_PROP.key(),                                                                "timestamp=com.*,id=com.*").build()).build())                                .withEmbeddedTimelineServerEnabled(true)                                .withAutoCommit(false)                                .withWriteStatusFailureFraction(0.0)                                .build();                        hoodieTable = HoodieFlinkWriteableTable.of(config);                    }                    @Override                    public WriteStatus map(String s) throws Exception {                        String[] parts = s.split(",");                        Timestamp ts = Timestamp.valueOf(parts[1]);                        return hoodieTable.insert(parts[0] + parts[1], DataSourceUtils.createHoodieRecord(parts[0] + parts[1], parts[0], ts.getTime()));                    }                })                .print();        env.execute();    }}

    这个demo包括了Flink作为数据流处理引擎,从Kafka消费数据,然后sink到Hudi。在代码中,首先设置了StreamExecutionEnvironment,并指定了如下的配置:

    env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);env.enableCheckpointing(5000);

    这里使用了EventTime作为时间特性,然后启用了checkpoint,每5000ms进行一次checkpoint。然后创建了一个Kafka Consumer,并添加到stream处理数据,flatMap函数将数据扁平化,然后map函数将数据插入到Hudi中。

    在map函数中,首先指定了Hudi的base path,然后创建了HoodieWriteConfig对象,主要包括了数据源配置、数据写入配置、Hudi表的配置等等。之后创建了一个HoodieFlinkWriteableTable对象,将数据写入到Hudi中。最后,使用print()方法将结果打印出来。

    需要注意的是,此demo中使用的是插入数据的方式写入Hudi,可以根据实际情况选择不同的写入方式。

  5. 我找到了一个 Apache Hudi 官方提供的 Flink Sink 的 demo 示例,可以帮助您了解如何在 Flink 中使用 Hudi 进行数据写入和处理。以下是该示例的来源链接:

    https://github.com/apache/hudi/tree/master/hudi-flink/src/main/java/org/apache/hudi/flink/demo

    在这个示例中,Apache Hudi 提供了一个 Flink Sink 的实现,可以将输入流的数据写入到 Hudi 数据库中。该示例使用 Avro 格式的数据进行演示,并且提供了一些基本的配置选项,如数据表名称、数据写入模式、事件模式等。同时,该示例还提供了一些自定义的函数和操作符,如 Avro 序列化器、减少重复数据的操作符等,可以帮助您更好地理解和使用 Hudi 和 Flink。

  6. 是的,这里提供一个简单的示例代码来演示使用Flink将数据写入Hudi中。

    首先,需要使用以下依赖项:

    org.apache.flink flink-hudi 1.14.0 org.apache.hudi hudi-core 0.11.0-incubating 在代码中,可以按照以下步骤来使用Hudi Sink:

    创建Hudi Sink配置 Configuration hudiConf = FlinkOptionsWriter .buildHudiConfig(“/path/to/hudi/dataset”, “table-name”, “hdfs://hadoop-master:8020”, “parquet”); 其中,”/path/to/hudi/dataset”是指Hudi表所在的HDFS路径,”table-name”是表名,”hdfs://hadoop-master:8020″是指向HDFS的URI,”parquet”是存储格式。

    创建Flink流式处理作业 在这里只提供一个示例,读取Kafka中的JSON数据,并将其写入Hudi表中。

    // Flink流式处理程序 StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

    // 创建Kafka消费者 Properties consumerProperties = new Properties(); consumerProperties.setProperty(“bootstrap.servers”, “localhost:9092”); consumerProperties.setProperty(“group.id”, “test-group”);

    FlinkKafkaConsumer kafkaConsumer = new FlinkKafkaConsumer<>(“my-topic”, new SimpleStringSchema(), consumerProperties); DataStream stream = env.addSource(kafkaConsumer);

    // 数据变换 DataStream hoodieRecordStream = stream.map(new MapFunction() { @Override public HoodieRecord map(String value) throws Exception { JSONObject obj = new JSONObject(value);

        String uuid = obj.getString("uuid");    String data = obj.getString("data");    HashMap map = new HashMap();    map.put("uuid", uuid);    map.put("data", data);    return new HoodieRecord(new HoodieKey(uuid), map);}

    });

    // 写入Hudi表 hudiRecordStream.sink(new HoodieFlinkStreamer(hudiConf));

    env.execute(“Write data to Hudi”); 在这段代码中,首先从Kafka消费数据,然后将其映射为Hudi记录对象,最后使用HoodieFlinkStreamer将数据写入Hudi表中。

    注意:以上示例仅用于演示目的,实际使用时需要根据具体情况进行修改。

  7. 是的,Apache Hudi已经提供了Flink Sink的实现,您可以通过以下步骤来使用:

    首先,需要在POM文件中添加Hudi和Flink的依赖,例如: org.apache.hudi hudi-flink ${hudi.version}

    org.apache.flink flink-connector-filesystem_2.11 ${flink.version} 其中,${hudi.version}和${flink.version}需要替换为相应的版本号。

    在Flink应用程序中,创建一个WriteHoodieTableFunction对象,用于将数据写入Hudi表中。例如: WriteHoodieTableFunction.Builder builder = WriteHoodieTableFunction.newBuilder() .withWriteConfig(HoodieWriteConfig.newBuilder() .withPath(“/path/to/hudi/table”) .withSchema(SCHEMA) .withParallelism(2, 2) .forTable(“my_hudi_table”) .build()) .withOperation(Operation.INSERT) .withRecordKeyField(FIELD_ID) .withPartitionPathField(FIELD_PARTITION);

        DataStreamSink> sink = input            .addSink(builder.build());

    在上述代码中,我们指定了数据写入的路径、模式、并行度等参数,并且设置了操作类型、记录键字段和分区路径字段等信息。然后将数据流(input)传递给addSink方法,将其写入Hudi表中。

    需要注意的是,在使用Flink Sink写入Hudi表时,需要保证数据的基本写入一致性。具体而言,可以使用WriteMode来控制写入模式,例如:

    builder.withWriteConfig(HoodieWriteConfig.newBuilder() .withPath(“/path/to/hudi/table”) .withSchema(SCHEMA) .withParallelism(2, 2) .forTable(“my_hudi_table”) .withWriteConcurrency(2) .withWriteBufferLimitBytes(1024 * 1024 * 1024) .withIndexConfig( HoodieIndexConfig.newBuilder() .withIndexType(HoodieIndex.IndexType.BLOOM) .build()) .withAutoCommit(false) .withWriteStatusClass(MetadataMergeWriteResult.class) .withWriteBootstrapIndex(true) .withCompactionConfig( HoodieCompactionConfig.newBuilder() .withPayloadClass(SCHEMA.getClass()) .build()) .withEmbeddedTimelineServerEnabled(true) .withBulkInsertSortMode(BulkInsertSortMode.GLOBAL_SORT) .withProps(props) .writeConcurrency(2) .insertSplitSize(1) // 设置初始写入批次大小 .bulkInsertSortMode(BulkInsertSortMode.GLOBAL_SORT) .withWriteMode(WriteMode.UPSERT) .build()); 在上述代码中,我们将写入模式设置为UPSERT,表示如果记录键相同,则更新现有记录。此外,还设置了初始写入批次大小、并行度、索引类型等参数。

    总的来说,使用Flink Sink写入Hudi表可以很方便地实现数据的同步和管理。需要注意的是,在使用过程中,需要根据具体的业务场景和数据特点进行相应的配置和优化,以提高数据的处理效率和准确性。

  8. 以下是一个将Flink数据写入Hudi的示例代码:

    import org.apache.flink.api.common.functions.MapFunction;import org.apache.flink.api.common.serialization.SimpleStringSchema;import org.apache.flink.core.fs.FileSystem;import org.apache.flink.streaming.api.datastream.DataStream;import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.fs.FileSystem;import org.apache.hadoop.fs.Path;import org.apache.hudi.client.HoodieWriteClient;import org.apache.hudi.client.WriteStatus;import org.apache.hudi.common.model.HoodieRecord;import org.apache.hudi.common.model.HoodieTableType;import org.apache.hudi.common.util.FSUtils;import org.apache.hudi.keygen.SimpleKeyGenerator;import java.io.IOException;import java.util.ArrayList;import java.util.List;import java.util.Properties;public class FlinkToHudi {    public static void main(String[] args) throws Exception {        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();        Properties properties = new Properties();        properties.setProperty("bootstrap.servers", "localhost:9092");        properties.setProperty("group.id", "flink");        DataStream kafkaStream = env.addSource(new FlinkKafkaConsumer<>("topic", new SimpleStringSchema(), properties));        DataStream hoodieStream = kafkaStream.map(new MapFunction() {            @Override            public HoodieRecord map(String s) throws Exception {                // 在这里构造HoodieRecord对象                HoodieRecord record = new HoodieRecord<>(key, value);                return record;            }        });        String basePath = "hdfs://localhost:9000/user/hudi/test";        Configuration hadoopConf = new Configuration();        org.apache.hadoop.fs.FileSystem fs = org.apache.hadoop.fs.FileSystem.get(hadoopConf);        HoodieWriteClient writeClient = new HoodieWriteClient(fs, basePath);        List writeStatuses = new ArrayList<>();        hoodieStream.foreachBatch((records, aLong) -> {            if (!records.isEmpty()) {                writeStatuses.addAll(writeClient.upsert(new org.apache.hudi.common.model.HoodieJavaRDD<>(records.rdd()), aLong.toString()));            }        });        env.execute("Flink to Hudi");    }}

    在上面的代码中,我们首先使用FlinkKafkaConsumer从Kafka中读取数据,然后将数据转换为HoodieRecord对象。接着,我们使用HoodieWriteClient对象将HoodieRecord写入Hudi表中。这里需要注意的是,我们使用foreachBatch方法将每个批次的数据写入Hudi表中,以提高写入的效率。

    在使用该示例代码时,需要先将Hudi和相关依赖库添加到项目中,并根据实际情况修改代码中的配置参数。

  9. 以下是使用 Flink 将数据 Sink 到 Hudi 的示例代码:

    Copy code

    // Hudi 配置Configuration hudiConfig = HoodieWriteConfig.newBuilder()        .withPath("/path/to/hudi/table")        .withSchema(HoodieAvroUtils.createHoodieWriteSchema(dataSchema))        .withTableName("test")        .withBulkInsertParallelism(3)        .withPayloadClassName("org.apache.hudi.avro.model.DefaultHoodieRecordPayload")        .forTable("test")        .withIndexConfig(HoodieIndexConfig.newBuilder()                .withIndexType(HoodieIndex.IndexType.BLOOM)                .build())        .withCompactionConfig(HoodieCompactionConfig.newBuilder()                .withPayloadClass("org.apache.hudi.avro.model.HoodieAvroPayload")                .build())        .withAutoCommit(false)        .withProps(props)        .build();// 创建 Flink 流式计算环境StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();// 创建 Flink 数据流DataStream dataStream = env        .addSource(new FlinkKafkaConsumer<>(kafkaTopic, new SimpleStringSchema(), properties))        .returns(Types.STRING)        .flatMap((String line, Collector out) -> {            // 解析输入数据并转换成 Row 类型            Row row = new Row(3);            row.setField(0, ...);            row.setField(1, ...);            row.setField(2, ...);            out.collect(row);        })        .returns(Types.ROW);// 将数据 Sink 到 HudidataStream.addSink(new HoodieSinkFunction<>(hudiConfig, new UpsertHandler()))

    需要注意的是,这只是一个简单的示例代码,具体的实现需要根据实际场景进行调整。其中 HoodieSinkFunction 是 Flink 的自定义 Sink 函数,用于将数据写入到 Hudi 表中。UpsertHandler 则是处理数据的函数,根据实际情况进行修改。

  10. 以下是使用 Flink 将数据写入 Apache Hudi 的一个简单的示例。假设需要将批量的 JSON 数据写入 Hudi 中,可以按照以下步骤进行:

    引入必要的依赖: org.apache.flink flink-hudi ${flink.version} 创建 Flink 批处理作业,并读取 JSON 数据: ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();

    // 读取 JSON 数据 DataSource dataSource = env.readTextFile(“path/to/json/data”); 使用 JsonNodeDeserializationSchema 将 JSON 数据转换为 JsonNode 对象,并使用 HoodieFlinkWriteableTable 定义 Hudi 表的基本信息: // 将 JSON 数据转换为 JsonNode 对象 DataStream jsonDataStream = dataSource.map(new MapFunction() { @Override public JsonNode map(String value) throws Exception { ObjectMapper objectMapper = new ObjectMapper(); return objectMapper.readValue(value, JsonNode.class); } });

    // 定义 Hoodie 表的基本信息 Configuration conf = new Configuration(); conf.set(HoodieWriteConfig.TABLE_NAME, “tableName”); conf.set(HoodieWriteConfig.RECORD_KEY_FIELD, “_row_key”); conf.set(HoodieWriteConfig.PARTITION_PATH_FIELD, “date”);

    HoodieFlinkWriteableTable hoodieTable = HoodieFlinkWriteableTable.newBuilder() .withTableName(“tableName”) .withRecordKeyField(“_row_key”) .withPartitionPathField(“date”) .withPreCombineField(null) .withOperation(UPSERT) .withWriteConfig(HoodieWriteConfig.newBuilder().withConfiguration(conf).build()) .build(); 将数据写入 Hudi 中: // 定义 Flink 的 SinkFunction HoodieFlinkSink hoodieSink = HoodieFlinkSink.newWriteStreamer(hoodieTable, env);

    // 写入数据到 Hudi jsonDataStream.addSink(hoodieSink); 完整代码示例如下:

    ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();

    // 读取 JSON 数据 DataSource dataSource = env.readTextFile(“path/to/json/data”);

    // 将 JSON 数据转换为 JsonNode 对象 DataStream jsonDataStream = dataSource.map(new MapFunction() { @Override public JsonNode map(String value) throws Exception { ObjectMapper objectMapper = new ObjectMapper(); return objectMapper.readValue(value, JsonNode.class); } });

    // 定义 Hoodie 表的基本信息 Configuration conf = new Configuration(); conf.set(HoodieWriteConfig.TABLE_NAME, “tableName”); conf.set(HoodieWriteConfig.RECORD_KEY_FIELD, “_row_key”); conf.set(HoodieWriteConfig.PARTITION_PATH_FIELD, “date”);

    HoodieFlinkWriteableTable hoodieTable = HoodieFlinkWriteableTable.newBuilder() .withTableName(“tableName”) .withRecordKeyField(“_row_key”) .withPartitionPathField(“date”) .withPreCombineField(null) .withOperation(UPSERT) .withWriteConfig(HoodieWriteConfig.newBuilder().withConfiguration(conf).build()) .build();

    // 定义 Flink 的 SinkFunction HoodieFlinkSink hoodieSink = HoodieFlinkSink.newWriteStreamer(hoodieTable, env);

    // 写入数据到 Hudi jsonDataStream.addSink(hoodieSink);

    env.execute(“Flink Hudi Example”); 需要注意的是,上述代码仅为演示示例,实际应用中需要根据具体情况进行调整和优化。

  11. 示例:

    import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;import org.apache.flink.streaming.connectors.hudi.HoodieFlinkWriteConfig;import org.apache.flink.streaming.connectors.hudi.HoodieSink;import org.apache.flink.streaming.connectors.hudi.HoodieWriteHandleFactory;import org.apache.flink.streaming.connectors.hudi.HoodieWriteable;import org.apache.flink.streaming.connectors.hudi.HoodieWriteableTable;import org.apache.hudi.DataSourceWriteOptions;import org.apache.hudi.client.HoodieWriteClient;import org.apache.hudi.common.model.HoodieTableType;import org.apache.hudi.configuration.FlinkOptions;import org.apache.hudi.sink.StreamWriteOperatorFactory;import java.util.Properties;public class FlinkHudiDemo {  public static void main(String[] args) throws Exception {    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();    // 构造 HoodieFlinkWriteConfig    Properties props = new Properties();    props.setProperty(FlinkOptions.TABLE_TYPE.key(), HoodieTableType.COPY_ON_WRITE.name());    props.setProperty(FlinkOptions.PATH.key(), "/path/to/hudi/table");    props.setProperty(FlinkOptions.TABLE_NAME.key(), "hudi_table_name");    props.setProperty(FlinkOptions.PRECOMBINE_FIELD.key(), "timestamp");    props.setProperty(FlinkOptions.RECORD_KEY_FIELD.key(), "id");    props.setProperty(FlinkOptions.PARTITION_PATH_FIELD.key(), "partition_path");    HoodieFlinkWriteConfig writeConfig = HoodieFlinkWriteConfig.newBuilder()        .withWritePayloadRecordKey("id")        .withPath("/path/to/hudi/table")        .withTableName("hudi_table_name")        .withPreCombineField("timestamp")        .withProps(props)        .build();    // 构造 HoodieSink    HoodieWriteHandleFactory handleFactory = new HoodieWriteHandleFactory() {      @Override      public HoodieWriteableTable create(          HoodieWriteClient client, String instantTime) {        return new HoodieWriteableTable<>(client, instantTime, HoodieWriteableRecord.class);      }    };    HoodieWriteable hoodieWriteable = new HoodieWriteable<>(handleFactory);    HoodieSink hoodieSink = new HoodieSink<>(writeConfig, hoodieWriteable,        new HoodieSinkFunction.HoodieSinkFunctionFactory<>(), new StreamWriteOperatorFactory<>());    // 数据源    env.addSource(new MyDataSource())        .map(new MyMapper())        .addSink(hoodieSink);    env.execute("Flink Hudi Demo");  }}

    通过HoodieFlinkWriteConfig来配置写入Hudi的相关参数,其中包括表路径、表名称、表类型、记录主键、分区字段等。通过HoodieSink将数据写入Hudi。