# Avro File Output
## 
Avro File Output
### Description
The Avro File Output transform can write Apache Avro messages to a file or field.
| Hop Engine | ✓ |
| ---------- | ------------ |
| Spark | ✓ |
| Flink | ✓ |
| Dataflow | ✓ |
### Options
| Option | Description |
| -------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------- |
| Transform name | Name of the transform. Note: This name has to be unique in a single pipeline. |
| Output Type | The type of output you want, this can be binary file, binary message or a JSON message. When selecting message it will be sent to the Output Field. |
| Filename | The filepath where to save the avro data file. |
| Output Field | When not writing to a file this is the fieldname used to output the message to. |
| Automatically create schema | You can either select an existing schema or create a schema based on the fields in the fields tab. |
| Write schema to file | Select this to write the schema to a separate file. |
| Avro namespace | Namespace used in the Avro file. |
| Avro record name | Name used for the Avro record. |
| Avro documentation | |
| Schema filename | Filepath to write or read the schema from. |
| Create parent folder | When creating a file, select this if you want to create the parent folder. |
| Compression codec | Compression used for the avro messages when writing to a file. |
| Include transform nr in filename | Add the Transform instance number to the filename. |
| Include partition nr in filename | Add the Partition number to the filename. |
| Include date in filename | Include the date when the file was created in the filename |
| Include time in filename | Include the time when the file was created in the filename |
| Specify date format | Specify a custom date and format to attach to the filename |
| Date time format | Date time specification used for the formatting |
| Add filenames to result | Add the resulting filenames that are created to the filename results |
Fields tab:
| Option | Description |
| ---------------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| Name | The source field in the stream. |
| Avro Schema Path | The destination field, when an existing schema is specified this is populated with the fields from the schema to map the input fields to. |
| Avro Type | The Avro type of the field in the Avro destination file. |
| Nullable | Is the field nullable? |
### Metadata Injection Support
To inject the Avro field type use following codes
AVRO\_TYPE\_NONE = 0\
AVRO\_TYPE\_BOOLEAN = 1\
AVRO\_TYPE\_DOUBLE = 2\
AVRO\_TYPE\_FLOAT = 3\
AVRO\_TYPE\_INT = 4\
AVRO\_TYPE\_LONG = 5\
AVRO\_TYPE\_STRING = 6\
AVRO\_TYPE\_ENUM = 7
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