I have a custom MappingJackson2HttpMessageConverter that I add to the top of the converters list:
@Override
public void extendMessageConverters(final List<HttpMessageConverter<?>> converters) {
converters.add(0, customJacksonMessageConverter());
}
However, there are times when I need to skip over this and use the Spring default MappingJackson2HttpMessageConverter, like when I want to update the logging level of my application through Spring Boot Admin. In my custom converter, I have overridden both canRead() and canWrite() with an added debug log line to see what the value returned is, and I can see they both return false when I need to skip over. However, parsing using the default fails. If I remove my custom converter from the list, then the default does work.
My list of converters looks like this:
com.meanwhile.in.hell.converters.json.CustomJacksonMessageConverter
org.springframework.http.converter.ByteArrayHttpMessageConverter
org.springframework.http.converter.StringHttpMessageConverter
org.springframework.http.converter.StringHttpMessageConverter
org.springframework.http.converter.ResourceHttpMessageConverter
org.springframework.http.converter.ResourceRegionHttpMessageConverter
org.springframework.http.converter.xml.SourceHttpMessageConverter
org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter
org.springframework.http.converter.json.MappingJackson2HttpMessageConverter
org.springframework.http.converter.json.MappingJackson2HttpMessageConverter
org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter
org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter
I don't see why if my custom converter returns false for canRead() and canWrite(), that it doesn't just skip over this and continue down the list of converters until it gets to the default Spring JSON converter.
