Avro Format
MIME type: application/avro
ID: avro
Avro is a binary data format that uses a schema to structure its data. DataWeave relies on the schema to parse the data. Avro data structures are mapped to DataWeave data structures.
Java Value Mapping
The following table shows how Avro types map to DataWeave types.
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Example: Use an Avro Schema
The following example shows how to specify a schema that the writer uses to output an Avro data structure.
Input
An Avro schema looks something like this.
{
"type": "record",
"name": "userInfo",
"namespace": "my.example",
"fields": [
{
"name": "username",
"type": "string",
"default": "NONE"
},
{
"name": "age",
"type": "int",
"default": -1
},
{
"name": "phone",
"type": "string",
"default": "NONE"
},
{
"name": "housenum",
"type": "string",
"default": "NONE"
}
]
}Source
The schemaUrl property in the header of this DataWeave script passes a schema (schema.json) to the DataWeave writer. The writer uses the schema to structure content from the body of the script and output the results in Avro format.
%dw 2.0
output application/avro schemaUrl="classpath://schema.json"
---
[{
username: "Mariano",
age: 35,
phone: "213",
housenum: "123"
},
{
username: "Leandro",
age: 29,
phone: "213",
housenum: "123"
},
{
username: "Christian",
age: 25,
phone: "213",
housenum: "123"
}]Configuration Properties
DataWeave supports the following configuration properties for this format.
Reader Properties
This format accepts properties that provide instructions for reading input data.
| Parameter | Type | Default | Description |
|---|---|---|---|
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The URL for the Avro schema. Valid URI schemes are |
Writer Properties
This format accepts properties that provide instructions for writing output data.
| Parameter | Type | Default | Description |
|---|---|---|---|
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Size of the buffer writer. |
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Generates the output as a data stream when set to Valid values are |
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The URL for the Avro schema. Valid URI schemes are |