Springboot+Redis执行lua脚本的项目实践

EVAL script numkeys key [key ...] arg [arg ...]

EVAL "return {KEYS[1],KEYS[2],ARGV[1],ARGV[2]}" 2 key1 key2 first second
1) "key1"
2) "key2"
3) "first"
4) "second"

local key = "mykey"  
local value = "myvalue"  
redis.call("SET", key, value) -- 设置键值对  
local retrievedValue = redis.call("GET", key) -- 获取键的值

local listKey = "mylist"  
redis.call("LPUSH", listKey, "item1") -- 在列表头部插入元素  
redis.call("RPUSH", listKey, "item2") -- 在列表尾部插入元素  
local leftValue = redis.call("LPOP", listKey) -- 从列表头部弹出元素  
local rightValue = redis.call("RPOP", listKey) -- 从列表尾部弹出元素

local setKey = "myset"  
redis.call("SADD", setKey, "item1") -- 添加元素到集合  
redis.call("SADD", setKey, "item2")  
local isMember = redis.call("SISMEMBER", setKey, "item1") -- 检查元素是否在集合中

redis.call("MULTI") -- 开始事务块  
redis.call("SET", "key1", "value1")  
redis.call("SET", "key2", "value2")  
local result = redis.call("EXEC") -- 执行事务块

<dependency>  
    <groupId>org.springframework.boot</groupId>  
    <artifactId>spring-boot-starter-data-redis</artifactId>  
</dependency>

spring.redis.host=localhost  
spring.redis.port=6379

  //lua脚本
    private DefaultRedisScript<Boolean> casScript;
    @Resource
    private RedisTemplate redisTemplate;
    @PostConstruct
    public void init(){
        casScript=new DefaultRedisScript<>();
        //lua脚本类型
        casScript.setResultType(Boolean.class);
        //lua脚本在哪加载
        casScript.setScriptSource(new ResourceScriptSource(new ClassPathResource("compareAndSet.lua")));
    }

    public Boolean compareAndSet(String key,Long oldValue,Long newValue){
        List<String> keys=new ArrayList<>();
        keys.add(key);
        //参数一为lua脚本   
        //参数二为keys集合    对应KEYS[1]、KEYS[2]....
        //参数三为可变长参数  对应 ARGV[1]、ARGV[2]...
        return (Boolean) redisTemplate.execute(casScript,keys,oldValue,newValue);
    }

 @Resource
    private RedisTemplate redisTemplate;
    //lua脚本
    private DefaultRedisScript<Boolean> casScript;
    @PostConstruct
    public void init(){
        casScript=new DefaultRedisScript<>();
        //lua脚本类型
        casScript.setResultType(Boolean.class);
        //lua脚本在哪加载
        casScript.setScriptSource(new ResourceScriptSource(new ClassPathResource("compareAndSet.lua")));
    }
    public Boolean compareAndSet(String key,Long oldValue,Long newValue){
        List<String> keys=new ArrayList<>();
        keys.add(key);
        return (Boolean) redisTemplate.execute(casScript,keys,oldValue,newValue);
    }

local key=KEYS[1]
local oldValue=ARGV[1]
local newValue=ARGV[2]
local redisValue=redis.call('get',key)
if(redisValue==false or tonumber(redisValue)==tonumber(oldValue))
then
    redis.call('set',key,newValue)
    return true
else
    return false
end

  public Boolean compareAndSet(String key,Long oldValue,Long newValue){
        List<String> keys=new ArrayList<>();
        keys.add(key);
        return (Boolean) redisTemplate.execute(casScript,keys,oldValue,newValue);
    }