redisson对单个json的单个字段进行数值操作 - lua脚本

    @Override
    public String updateJson(String key, String field, long num, long limit) {
        String script = "local t = redis.call('get', KEYS[1]);\n" +
                "local j;\n" +
                "if t then j = cjson.decode(t); else j = cjson.decode(\"{}\"); end;\n" +
                "local n;\n" +
                "if j[ARGV[3]] then n = tonumber(j[ARGV[3]]); else n = 0 end;\n" +
                "local r = n + tonumber(ARGV[1]);\n" +
                "local limit = tonumber(ARGV[2]);\n" +
                "if r >= 0 and (limit < 0 or r <= limit) then j[ARGV[3]] = r; " +
                "redis.call('set', KEYS[1], cjson.encode(j)); end;\n" +
                "j[ARGV[3]] = r;" +
                "return cjson.encode(j);";
        RScript rscript = redissonClient.getScript();
        return rscript.eval(RScript.Mode.READ_WRITE, script, RScript.ReturnType.VALUE,
                Collections.singletonList(key), num, limit, field);
    }

    @Override
    public String hUpdateJson(String key, String uid, String field, long num, long limit) {
        String script = "local t = redis.call('hget', KEYS[1], ARGV[4]);\n" +
                "local j;\n" +
                "if t then j = cjson.decode(t); else j = cjson.decode(\"{}\"); end;\n" +
                "local n;\n" +
                "if j[ARGV[3]] then n = tonumber(j[ARGV[3]]); else n = 0 end;\n" +
                "local r = n + tonumber(ARGV[1]);\n" +
                "local limit = tonumber(ARGV[2]);\n" +
                "if r >= 0 and (limit < 0 or r <= limit) then j[ARGV[3]] = r; " +
                "redis.call('hset', KEYS[1], ARGV[4], cjson.encode(j)); end;\n" +
                "j[ARGV[3]] = r;" +
                "return cjson.encode(j);";
        RScript rscript = redissonClient.getScript();
        return rscript.eval(RScript.Mode.READ_WRITE, script, RScript.ReturnType.VALUE,
                Collections.singletonList(key), num, limit, field, uid);
    }