logo
Tags down

shadow

Spring Data Redis doesn't persist Date as null value


By : Bir Manangthen
Date : October 14 2020, 08:10 PM
help you fix your problem Spring Data Redis Repositories represent properties with null values as non-written hash entries. Or simplified: null properties are not written to Redis.
code :


Share : facebook icon twitter icon

Can I persist redis data in Oracle Database?


By : Abbigail Waje
Date : March 29 2020, 07:55 AM
help you fix your problem Disable the file writing in this case, and use Redis as a pure in-memory cache. To do it just comment all the "save" lines in redis.conf.
In pseudo code, reading a value should be done like this:
code :
result = get value from redis
if(result is null)
{
   result = get value from Oracle
   store result in redis
}
return result

Spring Data Redis: Redis Pipeline returning always null


By : Aamir_Brar
Date : March 29 2020, 07:55 AM
this one helps. The majority of your questions are available within the Spring Data Redis reference documentation.
Before digging into Pipelining, a single multi-get from one Hash does not require Pipelining because it's only a single command. Pipelining won't improve performance/stability/… of your Redis interaction.
code :
List<Object> results = getRedisTemplate().executePipelined(new RedisCallback<Object>() {

    @Override
    public Object doInRedis(RedisConnection connection) {

            connection.hMGet(key.getBytes(), params);

            return null;
    }
});

List<Object> hmget = (List<Object>) results.get(0);

Spring Data Redis - Issue while storing Date


By : user2059197
Date : March 29 2020, 07:55 AM
should help you out By Using Custom Serializer, this can be solved. Ref @https://kodejava.org/how-to-format-localdate-object-using-jackson/#comment-2027
code :
public class LocalDateSerializer extends StdSerializer<LocalDate> {
    private static final long serialVersionUID = 1L;

    public LocalDateSerializer() {
        super(LocalDate.class);
    }

    @Override
    public void serialize(LocalDate value, JsonGenerator generator, SerializerProvider provider) throws IOException {
        generator.writeString(value.format(DateTimeFormatter.ISO_LOCAL_DATE));
    }
}
@JsonDeserialize(using = LocalDateDeserializer.class)
@JsonSerialize(using = LocalDateSerializer.class)
private LocalDate createdDate;

Does Redis persist data?


By : Solin
Date : March 29 2020, 07:55 AM
this will help I suggest you read about this on http://redis.io/topics/persistence . Basically you lose the guaranteed persistence when you increase performance by using only in-memory storing. Imagine a scenario where you INSERT into memory, but before it gets persisted to disk lose power. There will be data loss.
Redis supports so-called "snapshots". This means that it will do a complete copy of whats in memory at some points in time (e.g. every full hour). When you lose power between two snapshots, you will lose the data from the time between the last snapshot and the crash (doesn't have to be a power outage..). Redis trades data safety versus performance, like most NoSQL-DBs do.

how to use redis to persist token using spring-security-oauth2


By : Mateus Costa
Date : March 29 2020, 07:55 AM
like below fixes the issue It is my first time developing an application with OAuth2 approach. I started based on certain tutorial and I am moving forward from this (http://websystique.com/spring-security/secure-spring-rest-api-using-oauth2/). , If using Spring Boot, add the dependency to pom.xml:
shadow
Privacy Policy - Terms - Contact Us © voile276.org