I need to store a list of object in Redis. Every element of the list should be accessed for a unique key. For that I think that the list of object should be stored as a map of object in Redis (I converted to String before to store it):
{
"code1": {
//object1
},
"code2": {
//object2
},
"code3": {
//object3
}
//object n...
}
I used this approach when I implemented it with RedisTemplate (imperative way). Now, I am using Reactive Redis and I would like to know what will be the correct way. I see in Spring Redis exists the ReactiveListOperations
interface.
At the moment I have the following code but when I executed, Redis doesn't return any value. I would like if I am using the correct approach to implement it.
@Service
@RequiredArgsConstructor
public class Service {
private final Client client;
private final ReactiveRedisTemplate<String, Map> reactiveRedisTemplate;
@Override
public Mono<Element> getElement(String name) {
return reactiveRedisTemplate.opsForValue().get(Constants.KEY_LIST)
.switchIfEmpty(Mono.defer(() -> {
//I get a map from the service when info is not stored in Redis
log.debug("Redis does not contain key: {}", Constants.KEY_LIST);
return this.client.getMap()
.doOnSuccess(mapFromService -> redisTemplate.opsForValue()
.set(Constants.KEY_LIST, mapFromService));
}))
.map(map -> {
//I suppose that flow continues here when Redis find the key in Redis
log.debug("Map from Redis: {}", map);
if (!map.containsKey(name)) {
return this.client.getMap()
.doOnSuccess(mapFromService -> reactiveRedisTemplate.opsForValue()
.set(Constants.KEY_LIST, mapFromService));
}
return map;
}).map(map -> {
//I get the specific element from the map
return map.get(name);
});
}
}
Thanks in advance!