blog/BigData-Notes
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update Flink_Data_Source.md

Browse Source
This commit is contained in:
heibaiying 2019-11-01 17:40:13 +08:00 committed by GitHub
parent 7e4add9328
commit 7960d1b699
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
notes/Flink_Data_Source.md
View File

@ -151,6 +151,7 @@ Exception in thread "main" java.lang.IllegalArgumentException: Source: 1 is not
如果你想要实现具有并行度的输入流，则需要实现 ParallelSourceFunction 或 RichParallelSourceFunction 接口，其与 SourceFunction 的关系如下图：
<div align="center"> <img src="https://github.com/heibaiying/BigData-Notes/blob/master/pictures/flink-RichParallelSourceFunction.png"/> </div>
ParallelSourceFunction 直接继承自 ParallelSourceFunction，具有并行度的功能。RichParallelSourceFunction 则继承自 AbstractRichFunction，同时实现了 ParallelSourceFunction 接口，所以其除了具有并行度的功能外，还提供了额外的与生命周期相关的方法，如 open() ，closen() 。
## 三、Streaming Connectors
@ -266,9 +267,11 @@ bin/kafka-console-producer.sh --broker-list hadoop001:9092 --topic flink-stream-
在 Producer 上输入任意测试数据，之后观察程序控制台的输出：
<div align="center"> <img src="https://github.com/heibaiying/BigData-Notes/blob/master/pictures/flink-kafka-datasource-producer.png"/> </div>
程序控制台的输出如下：
<div align="center"> <img src="https://github.com/heibaiying/BigData-Notes/blob/master/pictures/flink-kafka-datasource-console.png"/> </div>
可以看到已经成功接收并打印出相关的数据。
@ -277,4 +280,4 @@ bin/kafka-console-producer.sh --broker-list hadoop001:9092 --topic flink-stream-
1. data-sources：https://ci.apache.org/projects/flink/flink-docs-release-1.9/dev/datastream_api.html#data-sources
2. Streaming Connectors：https://ci.apache.org/projects/flink/flink-docs-release-1.9/dev/connectors/index.html
3. Apache Kafka Connector： https://ci.apache.org/projects/flink/flink-docs-release-1.9/dev/connectors/kafka.html
3. Apache Kafka Connector： https://ci.apache.org/projects/flink/flink-docs-release-1.9/dev/connectors/kafka.html