Redis Expire does not work

Question

I use ServiceStack.Redis (build from the latest sources: https://github.com/ServiceStack/ServiceStack.Redis/tree/master/src).

I do something like this:

Answer 1

Sorry but I can't really read your code very well in order to know if/what you're doing wrong.

I have a fair few tests for Expire, ExpireAt operations, here are some below which may better demonstrate how to use it:

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);
}

If you're still having a problem, can you please post a runnable code snippet or gist so I can better read your code.

EDIT: Answer to code example

When you use a typed client, the key that ultimately gets stored in Redis looks like:

'urn:CacheRecord:' + p_sParentKey

Which is a different key to what you're using in your example:

redisClient.Expire(p_sParentKey, validityPeriodInMinutes * 60);

So there are a couple of ways to get the urn key that's used in Redis. If you have the entity you can use the ToUrn() Extension method, e.g.

var cacheKey = foundKey.ToUrn();

Otherwise if you just have the 'Id', you can create the urn key like:

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

From there you can expire your entry:

redisClient.Expire(cacheKey, validityPeriodInMinutes * 60);

Although I understand how this is not intuitive, so I will look to add a RedisTypedClient.ExpiryIn method in a future version which would do this automatically for you. this should then let you do something like:

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

EDIT: Added method overloads:

I've added the method above in the latest version of the Redis Client (v2.07) which you can download here: https://github.com/ServiceStack/ServiceStack.Redis/downloads

With tests using your CacheRecord.

BTW: the Redis Client doesn't actually need [Serializer] attribute.