// todo: add in tests
public DataStoreInstance AddOrUpdate(DataStoreInstance instance)
{
// todo: better error handling here
// todo: add in test
if (instance == null)
{
throw new Exception("You cannot create a blank instance");
}
// todo: better error handling here
// todo: add in test
if (string.IsNullOrEmpty(instance.Name) || string.IsNullOrEmpty(instance.Description))
{
throw new Exception("You need a Name and Description to add an instance");
}
if (!instance.Exists(this))
{
instance.Add(this);
}
else
{
instance.Update(this);
}
// Ensure that the cached instance reflects any changes made
_instanceCache[instance.Name] = instance.Get(this);
return GetCachedInstance(instance.Name);
}
private DataStoreInstance GetCachedInstance(string name)
{
if (!_instanceCache.ContainsKey(name))
{
var instance = new DataStoreInstance(name).Get(this);
_instanceCache.Add(name, instance);
}
return _instanceCache[name];
}
// CreateInstance()
public DataStoreInstance CreateInstance(string name, string description)
{
var instance = new DataStoreInstance
{
DateCreated = DateTime.UtcNow,
Description = description,
Name = name
};
AddOrUpdate(instance);
return instance.Get(this);
}
public void Delete(DataStoreInstance instance)
{
// todo: better error handling here
if (instance == null)
{
throw new Exception("You need to provide an instance to delete");
}
// We need to drop all keys belonning to this instance
instance.DeleteAllKeys(this);
instance.Delete(this);
}
// Helper methods
private static void AreTheSame(DataStoreInstance instance1, DataStoreInstance instance2)
{
Assert.AreEqual(instance1.Description, instance2.Description);
Assert.AreEqual(instance1.DateCreated, instance2.DateCreated);
Assert.AreEqual(instance1.Id, instance2.Id);
Assert.AreEqual(instance1.Name, instance2.Name);
}
public void GetAll_Succeeds_WhenCalled()
{
_dataStore.CreateInstance(GenerateInstanceName(), _instanceDescription);
_dataStore.CreateInstance(GenerateInstanceName(), _instanceDescription);
_dataStore.CreateInstance(GenerateInstanceName(), _instanceDescription);
var instances = new DataStoreInstance().GetAll(_dataStore);
Assert.Greater(instances.Count, 3);
}
