因为Flink支持Hadoop文件系统抽象,并且有一个GCS连接器 - 在Google Cloud Storage之上实现它的库。
如何使用此存储库中的代码创建 Flink 文件源?
要实现此目的,您需要:
- 在 Flink 集群上安装和配置 GCS 连接器。
- 将 Hadoop 和 Flink 依赖项(包括 HDFS 连接器(添加到您的项目中:
<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>
-
使用它来创建具有GCS路径的数据源:
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/"));