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Custom deserializer

Pragya Keshap answered on February 19, 2023 Popularity 3/10 Helpfulness 1/10

answer Custom deserializer

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Custom deserializer

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package kioto.serde;
import kioto.Constants;
import kioto.HealthCheck;
import java.io.IOException;
import java.util.Map;
import org.apache.kafka.common.serialization.Deserializer;
public final class HealthCheckDeserializer implements Deserializer {
  @Override
  public HealthCheck deserialize(String topic, byte[] data) {
    if (data == null) {
      return null;
    }
    try {
      return Constants.getJsonMapper().readValue(data, HealthCheck.class);
    } catch (IOException e) {
      return null;
    }
  }
  @Override
  public void close() {}
  @Override
  public void configure(Map configs, boolean isKey) {}
}

https://www.baeldung.com/jackson-deserialization

Popularity 3/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 19 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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doing our own deserialization with a custom Deserializer

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public class ItemDeserializer extends StdDeserializer<Item> { 

    public ItemDeserializer() { 
        this(null); 
    } 

    public ItemDeserializer(Class<?> vc) { 
        super(vc); 
    }

    @Override
    public Item deserialize(JsonParser jp, DeserializationContext ctxt) 
      throws IOException, JsonProcessingException {
        JsonNode node = jp.getCodec().readTree(jp);
        int id = (Integer) ((IntNode) node.get("id")).numberValue();
        String itemName = node.get("itemName").asText();
        int userId = (Integer) ((IntNode) node.get("createdBy")).numberValue();

        return new Item(id, itemName, new User(userId, null));
    }
}
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Popularity 1/10 Helpfulness 1/10 Language java

Source: www.baeldung.com

Tags: deserialization java

Link to this answer
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Contributed on Feb 19 2023

Pragya Keshap

0 Answers Avg Quality 2/10

Custom deserializer

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