Redis - How to configure custom conversions

Question

In spring-data-redis, How do we need configure custom converters that can be auto-wired/injected from Spring boot application or configuration.

I read about @R

Answer 1

Tested with spring-boot-starter-data-redis:2.0.4.RELEASE.

I was facing a problem where my OffsetDateTime properties of my @RedisHash entity were not being stored when using CrudRepository.

The problem was that Jsr310Converters does not have a converter of OffsetDateTime.

To solve this, I created a reading converter:

@Component
@ReadingConverter
public class BytesToOffsetDateTimeConverter implements Converter {
    @Override
    public OffsetDateTime convert(final byte[] source) {
        return OffsetDateTime.parse(new String(source), DateTimeFormatter.ISO_OFFSET_DATE_TIME);
    }
}

and writing converter:

@Component
@WritingConverter
public class OffsetDateTimeToBytesConverter implements Converter {
    @Override
    public byte[] convert(final OffsetDateTime source) {
        return source.format(DateTimeFormatter.ISO_OFFSET_DATE_TIME).getBytes();
    }
}

And registered a RedisCustomConversions bean in the configuration:

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.convert.RedisCustomConversions;
import org.springframework.data.redis.repository.configuration.EnableRedisRepositories;

import java.util.Arrays;

@Configuration
@EnableRedisRepositories
public class RedisConfiguration {

    @Bean
    public RedisCustomConversions redisCustomConversions(OffsetDateTimeToBytesConverter offsetToBytes,
                                                         BytesToOffsetDateTimeConverter bytesToOffset) {
        return new RedisCustomConversions(Arrays.asList(offsetToBytes, bytesToOffset));
    }

}