Comments (2)
Here is a sample C# console app demonstrating the issue. Is this expected behavior? If so, any workarounds?
class Program
{
static void Main(string[] args) {
var manager = CacheFactory.Build("aname", settings => {
settings.WithMicrosoftMemoryCacheHandle("simplecacheinmemory");
});
var dc = manager.Get<DummyClass>("_dummyClass");
if (dc == null) {
dc = new DummyClass();
dc.T = "1";
manager.AddOrUpdate("_dummyClass", dc, _ => dc);
}
RefreshFromCacheAndPrintT(manager);
dc.T = Guid.NewGuid().ToString();
RefreshFromCacheAndPrintT(manager);
dc.T = Guid.NewGuid().ToString();
RefreshFromCacheAndPrintT(manager);
}
static void RefreshFromCacheAndPrintT(ICacheManager<object> manager) {
var dc = manager.Get<DummyClass>("_dummyClass");
Console.WriteLine(dc.T);
}
}
public class DummyClass
{
public string T { get; set; }
}
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InMemory cache does not use serialization to serialize/de-serialize your objects for obvious reasons.
And that's just how objects work in memory.
If you cache mutable structures, then, yeah, changes to that instance will be "visible" to all references to that instance.
There is nothing I can do to prevent that.
You could prevent it by removing the property setter of your cached classes to make them immutable, or other measures.
from cachemanager.
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