In our service, we are expecting a ZonedDateTime
data type from a queue (AWS SQS) message (that is subscribed to a AWS SNS) to be mapped in our POJO.
I kept getting this error
Caused by: org.springframework.messaging.converter.MessageConversionException: Could not read JSON: Cannot construct instance of `java.time.ZonedDateTime` (no Creators, like default construct, exist): no String-argument constructor/factory method to deserialize from String value ('2020-09-07T18:02:51.099+0000')
I thought that the solution was to override the ObjectMapper
to be able to register the module JavaTimeModule
so the message could be deserialized.
The solution was right but it still didn't solve the error.
I came to a realization (by the help of my coworker) that since we're using Spring Cloud to receive the message from the queue, messages that are received are handled by MappingJackson2MessageConverter
.
https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/jms/support/converter/MappingJackson2MessageConverter.html
The solution was to configure the MappingJackson2MessageConverter
's object mapper (see to it that your ObjectMapper
has a JavaTimeModule
), and set other configurations as well.
@Bean
public MappingJackson2MessageConverter mappingJackson2MessageConverter(ObjectMapper objectMapper) {
MappingJackson2MessageConverter jacksonMessageConverter = new MappingJackson2MessageConverter();
jacksonMessageConverter.setObjectMapper(objectMapper);
jacksonMessageConverter.setSerializedPayloadClass(String.class);
jacksonMessageConverter.setStrictContentTypeMatch(true);
return jacksonMessageConverter;
}
Hope this post helped you in any way!
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