[GitHub] [pulsar-client-node] danielfigueiredo opened a new issue #61: Support for Avro schema on `createProducer`

[GitBox <gi...@apache.org>]

danielfigueiredo opened a new issue #61: Support for Avro schema on `createProducer`
URL: https://github.com/apache/pulsar-client-node/issues/61
 
 
   Would it be possible to add a `schema` property on the config object that initializes `createProducer`? Similar to what Python does, we could initialize [avro-js](https://www.npmjs.com/package/avro-js) with the JSON schema and call `type.getSchema()` to initialize the producer.
   
   Having to disable schema validation on topics isn't ideal for some cases and I think only Java and Python are the clients that have schema support.
   
   A pseudo code would look like:
   
   ```js
       const client = new Pulsar.Client({
         serviceUrl: 'pulsar://localhost:6650',
       });
   
       const type = avro.parse({
         name: 'Pet',
         type: 'record',
         fields: [
           {name: 'kind', type: {name: 'Kind', type: 'enum', symbols: ['CAT', 'DOG']}},
           {name: 'name', type: 'string'}
         ]
       });
   
       const producer = await client.createProducer({
         topic: 'persistent://public/default/my-topic',
         schema: type.getSchema(),
       });
   ```
   
   I'm not sure if the schema validation happens on the client when creating the producer, even if that is the case `avro-js` has methods to check whether JS objects are valid for a given schema.
   
   On that same line, alternatively, is there any guidelines on how to implement a client? What makes it more difficult for me is that I don't know c++ and I would like to contribute with the JS library (specially Typescript).

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