Redis Expire不起作用

Question

我使用ServiceStack.Redis(从最新的源代码构建:https://github.com/ServiceStack/ServiceStack.Redis/tree/master/src).

我做这样的事情:

CacheRecord foundKey = cacheRecords.GetById(p_sParentKey);
...
CacheRecord cacheRecord = cacheRecords.Store(foundKey);
...
redisClient.Expire(p_sParentKey, validityPeriodInMinutes * 60);

我试图调试使用 Console.WriteLine(cacheRecords.GetTimeToLive(p_sParentKey));哪个返回-00:00:01.我分配给validityPeriodInMinutes的值是无关紧要的.

我试过藏汉Expire,ExpireAt,ExpireEntryAt,ExpireEntryIn.我也尝试过这样的事情:

int epoch = (int)(DateTime.UtcNow.AddSeconds(validityPeriodInMinutes) - new DateTime(1970, 1, 1)).TotalSeconds;
redisClient.ExpireAt(p_sParentKey, epoch);

任何的想法？

[Serializable]
public class CacheRecord
{
    public CacheRecord()
    {
        this.Children = new List<CacheRecordChild>();
    }

    public string Id { get; set; }
    public List<CacheRecordChild> Children { get; set; }
}
#endregion

#region public class CacheRecordChild
[Serializable]
public class CacheRecordChild
{
    public string Id { get; set; }
    public string Data { get; set; }
}

public void AddKey(string p_sParentKey, string p_sChildKey, string p_sData, int validityPeriodInMinutes)
    {
        using (ServiceStack.Redis.RedisClient redisClient = new ServiceStack.Redis.RedisClient())
        {
            using (var cacheRecords = redisClient.GetTypedClient<CacheRecord>())
            {
                CacheRecord foundKey = cacheRecords.GetById(p_sParentKey);
                if (foundKey == null)
                {
                    foundKey = new CacheRecord();
                    foundKey.Id = p_sParentKey;
                    CacheRecordChild child = new CacheRecordChild();
                    child.Id = p_sChildKey;
                    child.Data = p_sData;
                    foundKey.Children.Add(child);                        
                    CacheRecord cacheRecord = cacheRecords.Store(foundKey);
                    //redisClient.Expire(p_sParentKey, validityPeriodInMinutes);
                    redisClient.Expire(p_sParentKey, validityPeriodInMinutes * 60);                       
                }
                else
                {
                    CacheRecordChild child = new CacheRecordChild();
                    child.Id = p_sChildKey;
                    child.Data = p_sData;
                    foundKey.Children.Add(child);
                    CacheRecord cacheRecord = cacheRecords.Store(foundKey);
                    // redisClient.Expire(p_sParentKey, validityPeriodInMinutes);
                    // redisClient.Expire(p_sParentKey, validityPeriodInMinutes * 60);
                    // int epoch = (int)(DateTime.UtcNow.AddSeconds(validityPeriodInMinutes) - new DateTime(1970, 1, 1)).TotalSeconds;
                    redisClient.Expire(p_sParentKey, validityPeriodInMinutes * 60);
                }
            }
        }
    }

Answer 1

对不起,但我不能很好地阅读你的代码,以便知道你做错了什么/你做错了什么.

我对Expire,ExpireAt操作进行了一些测试,下面是一些可以更好地演示如何使用它的测试:

https://github.com/ServiceStack/ServiceStack.Redis/blob/master/tests/ServiceStack.Redis.Tests/RedisClientTests.cs

[Test]
public void Can_Expire()
{
    Redis.SetEntry("key", "val");
    Redis.Expire("key", 1);
    Assert.That(Redis.ContainsKey("key"), Is.True);
    Thread.Sleep(2000);
    Assert.That(Redis.ContainsKey("key"), Is.False);
}

[Test]
public void Can_ExpireAt()
{
    Redis.SetEntry("key", "val");

    var unixNow = DateTime.Now.ToUnixTime();
    var in1Sec = unixNow + 1;

    Redis.ExpireAt("key", in1Sec);

    Assert.That(Redis.ContainsKey("key"), Is.True);
    Thread.Sleep(2000);
    Assert.That(Redis.ContainsKey("key"), Is.False);
}

如果您仍有问题,可以发布一个可运行的代码段或要点,以便我可以更好地阅读您的代码.

编辑:回答代码示例

使用类型化客户端时,最终存储在Redis中的密钥如下所示:

'urn:CacheRecord:' + p_sParentKey

这与您在示例中使用的内容不同:

redisClient.Expire(p_sParentKey, validityPeriodInMinutes * 60);

因此,有两种方法可以获取Redis中使用的urn键.如果你有实体,你可以使用ToUrn()扩展方法,例如

var cacheKey = foundKey.ToUrn();

否则,如果你只有'Id',你可以创建urn键,如:

var cacheKey = IdUtils.CreateUrn<CacheRecord>(p_sParentKey);

从那里你可以使你的参赛作品到期:

redisClient.Expire(cacheKey, validityPeriodInMinutes * 60);

虽然我理解这是不直观的,所以我将在未来的版本中添加一个RedisTypedClient.ExpiryIn方法,它将自动为您执行此操作.这应该让你做一些像:

cacheRecords.ExpireIn(p_sParentKey, TimeSpan.FromMinutes(validityPeriodInMinutes));

编辑:添加方法重载:

我在最新版本的Redis Client(v2.07)中添加了上述方法,您可以在此处下载:https: //github.com/ServiceStack/ServiceStack.Redis/downloads

使用您的CacheRecord进行测试.

顺便说一句:Redis客户端实际上并不需要[Serializer]属性.