docs/content/docs/connectors/datastream/formats/text_files.md

---
title:  "Text files"
weight: 4
type: docs
aliases:
- /dev/connectors/formats/text_files.html
- /apis/streaming/connectors/formats/text_files.html
---
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# Text files format

Flink supports reading from text lines from a file using `TextLineInputFormat`. This format uses Java's built-in InputStreamReader to decode the byte stream using various supported charset encodings.
To use the format you need to add the Flink Connector Files dependency to your project:

```xml
<dependency>
	<groupId>org.apache.flink</groupId>
	<artifactId>flink-connector-files</artifactId>
	<version>{{< version >}}</version>
</dependency>
```

For PyFlink users, you could use it directly in your jobs.

This format is compatible with the new Source that can be used in both batch and streaming modes.
Thus, you can use this format in two ways:
- Bounded read for batch mode
- Continuous read for streaming mode: monitors a directory for new files that appear

**Bounded read example**:

In this example we create a DataStream containing the lines of a text file as Strings. 
There is no need for a watermark strategy as records do not contain event timestamps.

{{< tabs "bounded" >}}
{{< tab "Java" >}}
```java
final FileSource<String> source =
  FileSource.forRecordStreamFormat(new TextLineInputFormat(), /* Flink Path */)
  .build();
final DataStream<String> stream =
  env.fromSource(source, WatermarkStrategy.noWatermarks(), "file-source");
```
{{< /tab >}}
{{< tab "Python" >}}
```python
source = FileSource.for_record_stream_format(StreamFormat.text_line_format(), *path).build()
stream = env.from_source(source, WatermarkStrategy.no_watermarks(), "file-source")
```
{{< /tab >}}
{{< /tabs >}}

**Continuous read example**:
In this example, we create a DataStream containing the lines of text files as Strings that will infinitely grow 
as new files are added to the directory. We monitor for new files each second.
There is no need for a watermark strategy as records do not contain event timestamps.

{{< tabs "continous" >}}
{{< tab "Java" >}}
```java
final FileSource<String> source =
    FileSource.forRecordStreamFormat(new TextLineInputFormat(), /* Flink Path */)
  .monitorContinuously(Duration.ofSeconds(1L))
  .build();
final DataStream<String> stream =
  env.fromSource(source, WatermarkStrategy.noWatermarks(), "file-source");
```
{{< /tab >}}
{{< tab "Python" >}}
```python
source = FileSource \
    .for_record_stream_format(StreamFormat.text_line_format(), *path) \
    .monitor_continously(Duration.of_seconds(1)) \
    .build()
stream = env.from_source(source, WatermarkStrategy.no_watermarks(), "file-source")
```
{{< /tab >}}
{{< /tabs >}}