@RestController
@RequestMapping("/lua")
public class TestLuaController {
    @Autowired
    private StringRedisTemplate redisTemplate;
    private static final String ORDER_CHECK_TOKEN = "order_check_token";
    private static final String ORDER_TOKEN_DEFAULT_VALUE = "value";
    /**
     * 場(chǎng)景：最近公司有高并發(fā)場(chǎng)景，涉及到用令牌防重（防止有人多次提交訂單）
     *     可以使用redis執(zhí)行l(wèi)ua腳本 比較key值令牌是否存在，如果存在即刪除
     */
    @RequestMapping("/checkTempToken")
    public Long luaExecute(String checkToken){
        //模擬提交訂單生成的防重令牌
        redisTemplate.opsForValue().set(ORDER_CHECK_TOKEN + checkToken,ORDER_TOKEN_DEFAULT_VALUE,60, TimeUnit.SECONDS);
        String script = "if redis.call(\"get\",KEYS[1]) == ARGV[1]\n" +
                "then\n" +
                "    return redis.call(\"del\",KEYS[1])\n" +
                "else\n" +
                "    return 0\n" +
                "end";
//執(zhí)行redis腳本操作的函數(shù)
        Long execute = redisTemplate.execute(new DefaultRedisScript<>(script, Long.class), Arrays.asList(ORDER_CHECK_TOKEN + checkToken), ORDER_TOKEN_DEFAULT_VALUE);
        System.out.println(execute);
        return execute;
    }
}

@Component
public class RedisLua {
    @Autowired
    private RedisTemplate<String,Object> redisTemplate;
    private DefaultRedisScript<Boolean> script;
    private static final String KEY_PREX = "alertInfo_";
    @PostConstruct
    private void init(){
        script = new DefaultRedisScript<Boolean>();
        script.setResultType(Boolean.class);
        script.setScriptSource(new ResourceScriptSource(new
                ClassPathResource("lua/alert.lua")));//lua腳本文件
    }public Boolean blockRepetition(String ruleId,String status,String ip,Object...args){
        List<String> keys = new ArrayList<>();
        keys.add(KEY_PREX + ip+ruleId+status);//key包括前綴+客戶(hù)端ip+告警規(guī)則id+狀態(tài)
        return redisTemplate.execute(script, keys, args);
    }
}

--[[ ARGV1表示redis生效時(shí)間，key表示存儲(chǔ)redis的key值]]
local alert = redis.call('exists',KEYS[1]);
if alert
 then
    return false
 else
    redis.call('set',KEYS[1],ngx.time())
    redis.call('expire',KEYS[1],ARGV[1])
    return true
end