spring-data-redis

i want to use Cacheable(sync=true) to controll concurrent behaviors to access a method @Service @CacheConfig(cacheNames = "book") public class BookService { @Cacheable(key = "#isbn",sync = true) public Book book(String isbn,int id) { System.out.println("wait 3s..."); try { Thread.sleep(3000); } catch (InterruptedException e) { e.printStackTrace(); } return new Book(isbn, "xxxx"); } } write a test case: ExecutorService executorService = Executors.newFixedThreadPool(10); for (int i = 0; i < 100; i++) { final int index = i; executorService.execute(new Runnable() { @Override public void run() {

I am using Spring Data Redis with the Spring Boot 2.0 example. In this example, I am trying to save the Customer data + Student data together. I'm not very sure how the data modelling happens here, but assuming its same like as Mongo DB (pure non relational). Could someone please help with the below error ? As its clear that some conversion has been expected to see the data. Error: org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [com.javasampleapproach.redis.model.Customer] to type [java.lang.String] at org.springframework.core

I am using the Redis Hash , in which I am storing student id as the key (which is not numeric), the value is POJO of student data. now I need redis-pagination i.e. I don't care about the students' order but I want to fetch only some students data in one go. can I do this in Redis? if for supporting the pagination some modification in the data structure is required that would be ok too. P.S. I am using spring-data-redis . but the solution without it would be ok too. basically, I want to find out whether redis supports pagination for hashes. Sounds like you are looking for the HSCAN command,

The project need a custom RedisConnectionFactory and finds a problem: when using LettuceConnectionFactory , the runtime always reports java.lang.NullPointerException, while JedisConnectionFactory can pass tests. I think that whether LettuceConnectionFactory have version restrictions on redis and springboot? Developing environment: Springboot: 2.1.0.release redis:3.2.8 jdk8. Java Code @Component @Configuration public class RedisConfig { public LettuceConnectionFactory lettuceConnectionFactoryTest(){ return new LettuceConnectionFactory(new RedisStandaloneConfiguration("127.0.0.1", 6379)); }

I am new to Redis and developing code using Spring Boot + Spring Data Redis example. When I saved the records, I see KEYS gets created and out of these keys 4 are HASH , 1 ZSET and all others are SET . I did not see in the Spring docs, meaning of each KEY is getting saved. . 127.0.0.1:6379> KEYS * 1) "persons:c5cfd49d-6688-4b83-a9b7-be55dd1c36ad" 2) "persons:firstname:bran" 3) "persons:39e14dae-fa23-4935-948f-1922d668d1c2" 4) "persons:f0b6dd26-8922-4a36-bd2a-792a17dddff7" 5) "persons:address.city:Achalpur" 6) "persons:e493385a-64ae-42be-8398-51757153d273:idx" 7) "persons:053cdfea-e430-4e1c

I'm working on an application(Spring) with the following requirements: Read data from Redis Server1 Read data from Redis Server2 Read data from Redis Server3 AND Save the information to MySQL. Can someone give us a thought to connect to different Redis servers using Spring Data Redis. Got a link: http://forum.spring.io/forum/spring-projects/data/nosql/104599-how-to-connect-to-multiple-redis-instances-using-redistemplate?view=stream But that's too old. Any help would be appreciated. There's not out-of-the-box support for accessing multiple servers at once but you can get there yourself. Usually