https://github.com/edgar-code-repository/avro-schema-generator
Generating Avro schema from Java class.
https://github.com/edgar-code-repository/avro-schema-generator
Last synced: 6 months ago
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Generating Avro schema from Java class.
- Host: GitHub
- URL: https://github.com/edgar-code-repository/avro-schema-generator
- Owner: edgar-code-repository
- Created: 2023-01-21T22:01:02.000Z (over 3 years ago)
- Default Branch: master
- Last Pushed: 2023-02-03T20:25:05.000Z (over 3 years ago)
- Last Synced: 2025-01-23T04:29:34.175Z (over 1 year ago)
- Language: Java
- Homepage:
- Size: 111 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
AVRO SCHEMA GENERATOR
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An Avro schema is generated from a Java class.
This is achieved by using Jackson and Avro libraries.
Because I'm a lazy programmer and don't enjoy writing schemas!
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**Dependencies in build.gradle file:**
```
dependencies {
compile "org.apache.avro:avro:1.8.2"
compile group: 'com.fasterxml.jackson.core', name: 'jackson-core', version: '2.8.8'
compile group: 'com.fasterxml.jackson.core', name: 'jackson-annotations', version: '2.8.8'
compile group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.8.8'
}
```
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**Class AvroMessageDTO:**
```
public class AvroMessageDTO {
private Integer code;
private String message;
@Nullable
private String description;
... getters
... and setters
}
```
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**Code that generates the Avro schema from class AvroMessageDTO:**
```
ReflectData reflectData = ReflectData.get();
Schema schema = reflectData.getSchema(AvroMessageDTO.class);
ObjectMapper mapper = new ObjectMapper();
JsonNode json = mapper.readTree(schema.toString());
PrettyPrinter prettyPrinter = new DefaultPrettyPrinter();
String strJson = mapper.writer(prettyPrinter).writeValueAsString(json);
System.out.println(strJson);
```
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**This is the Avro schema generated:**
```
{
"type" : "record",
"name" : "AvroMessageDTO",
"namespace" : "com.domain.example.dto",
"fields" : [
{ "name" : "code", "type" : "int" },
{ "name" : "message", "type" : "string" },
{ "name" : "description", "type" : [ "null", "string" ], "default" : null }
]
}
```
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