我使用ServiceStack.Redis(从最新来源构建:https://github.com/ServiceStack/ServiceStack.Redis/tree/master/src)。
我这样做:
CacheRecord foundKey = cacheRecords.GetById(p_sParentKey);
...
CacheRecord cacheRecord = cacheRecords.Store(foundKey);
...
redisClient.Expire(p_sParentKey, validityPeriodInMinutes * 60);
我尝试使用调试
Console.WriteLine(cacheRecords.GetTimeToLive(p_sParentKey));
返回-00:00:01
。
我分配给validityPeriodInMinutes的值是无关紧要的。
我尝试了Expire
,ExpireAt
,ExpireEntryAt
,ExpireEntryIn
。我也试过这样的事情:
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);
}
}
}
}
答案 0 :(得分:15)
很抱歉,但我不能很好地阅读你的代码,以便知道你是否做错了。
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:
[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);
}
如果您仍然遇到问题,可以发布一个可运行的代码段或要点,以便我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
与您在示例中使用的内容不同的是:
redisClient.Expire(p_sParentKey, validityPeriodInMinutes * 60);
因此,有两种方法可以获得Redis中使用的 urn键。如果您有实体,则可以使用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 key ,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);
虽然我理解这不直观,但我会在将来的版本中添加一个 RedisTypedClient.ExpiryIn 方法,它会自动为您执行此操作。这应该让你做类似的事情:
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
With tests using your CacheRecord
BTW:Redis客户端实际上并不需要[Serializer]属性。