Consume GCS files based on pattern from Flink

问题

Since Flink supports the Hadoop FileSystem abstraction, and there's a GCS connector - library that implements it on top of Google Cloud Storage.

How do I create a Flink file source using the code in this repo?

回答1:

To achieve this you need to:

Install and configure GCS connector on your Flink cluster.

Add Hadoop and Flink dependencies (including HDFS connector) to your project:

<dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-scala_2.11</artifactId>
    <version>${flink.version}</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-connector-filesystem_2.11</artifactId>
    <version>${flink.version}</version>
</dependency>
<dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-hadoop-compatibility_2.11</artifactId>
    <version>${flink.version}</version>
</dependency>
<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-common</artifactId>
    <version>${hadoop.version}</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-mapreduce-client-core</artifactId>
    <version>${hadoop.version}</version>
    <scope>provided</scope>
</dependency>

Use it to create data source with GCS path:

import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.hadoopcompatibility.HadoopInputs;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.TextInputFormat;

ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();

DataSet<Tuple2<LongWritable, Text>> input =
    env.createInput(
        HadoopInputs.readHadoopFile(
            new TextInputFormat(), LongWritable.class, Text.class, "gs://bucket/path/some*pattern/"));

来源：https://stackoverflow.com/questions/55612471/consume-gcs-files-based-on-pattern-from-flink

标签

apache-flink

google-cloud-dataproc