CODEWITHSUNDEEP
springredis
Thys Andries Michels
Thys Andries Michels

Reputation: 781

Spring Redis Delete does not delete key

I am trying to delete a redis key but for some reason it is not delete but also not throwing an exception. Here is my code to delete: 

import com.example.service.CustomerService;
import com.example.model.Customer;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.math.BigInteger;
import java.util.*;

@Service
public class RedisCustomerService implements CustomerService {

    @Autowired
    private RedisTemplate<String, Object> redisTemplate; 

    private String uniqueIdKey = "customerId";

    private BigInteger uniqueId() {
        long uniqueId = this.redisTemplate.opsForValue().increment(uniqueIdKey, 1);
        return BigInteger.valueOf(uniqueId);
    }

    private String lastNameKey(BigInteger id) {
        return "customer:ln:" + id;
    }

    private String firstNameKey(BigInteger id) {
        return "customer:fn:" + id;
    }

    @Override
    public void deleteCustomer(BigInteger id) {
        redisTemplate.opsForValue().getOperations().delete(String.valueOf(id));
    }
}

Upvotes: 21

Views: 58023

Answers (6)

Sumit
Sumit

Reputation: 1

 public void deleteCustomer(BigInteger id) {
        redisTemplate.setDefaultSerializer(new StringRedisSerializer());
        redisTemplate.delete(String.valueOf(id));
 }

Upvotes: 0

Baldiry
Baldiry

Reputation: 390

Before spring boot 2, if you didn't specify a serializer when building resttemplate, on redis you see keys like this:

"xac\xed\x00\x05t\x008mx.company.support.catalog.dao.keys"

But when trying to delete it with redisTemplate.delete(key) the key is not erased

One easy way is to get the key in byte and proceed to delete it.

Example in your class:

@Autowired
private RedisTemplate<String, Object> redisTemplate;

public boolean deleteKeyByPattern(String pattern) {
    Set<byte[]> patternResultConf = redisTemplate.getConnectionFactory().getConnection().keys(pattern.getBytes());
    if(Objects.nonNull(patternResultConf) && !patternResultConf.isEmpty()) {
        redisTemplate.getConnectionFactory().getConnection().del(patternResultConf.toArray(new byte[0][]));
    }
    return true;
}

Upvotes: 3

Seun Matt
Seun Matt

Reputation: 1848

An alternative technique for deleting using ValueOperations is to set an empty value that will expire almost immediately. Redis will handle the eviction itself.

For example, you can set a value like this:

valueOperations.set("key", "value");

When you want to delete you can then do something like this:

valueOperations.set("key", "", 1, TimeUnit.MILLISECONDS);

It's essential that the key is the same in both operations

Upvotes: 3

Shouyu Zhao
Shouyu Zhao

Reputation: 1

Try this:

public void deleteCustomer(BigInteger id) {
        redisTemplate.execute(new RedisCallback<String>() {
                @Override
                public String doInRedis(RedisConnection redisConnection) throws DataAccessException {
                        redisConnection.del(redisTemplate.getStringSerializer().serialize(String.valueOf(id)));
                        return null;
                }
        });
}

Upvotes: 0

Mr. 14
Mr. 14

Reputation: 9528

ValueOperations does NOT have delete method. So the following won't work:

redisTemplate.opsForValue().delete(key);

Try

redisTemplate.delete(key);

Upvotes: 59

Lamine
Lamine

Reputation: 1

There is no getOperation to use : 

@Override
public void deleteCustomer(BigInteger id) {
    redisTemplate.opsForValue().delete(String.valueOf(id));
}

Upvotes: -2

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