/// <summary>
/// WARNING: Per CvRDT definition, this operation must be COMMUTATIVE, ASSOCIATIVE, and IDEMPOTENT.
/// Failure to comply with these requirements may result in an infinite inter-node rotary traffic pattern.
/// </summary>
/// <param name="others"></param>
/// <returns>Object instance which results from merge, it can be one of the existing instances or a new one</returns>
public (bool isnew, HeapObject obj) MergeCrdt(IEnumerable <HeapObject> others)
{
if (others == null)
{
return(false, this);
}
if (!others.Any())
{
return(false, this);
}
others.IsTrue(v => v.All(one => one.GetType() == this.GetType() && one.Sys_Id == this.Sys_Id), "Non empty version for the same Sys_Id");
var versions = others.AddOneAtStart(this);
var result = this;
foreach (var ver in versions)
{
if (ver.Sys_VerState == State.Deleted)
{
if (result.Sys_VerState != State.Deleted)
{
result = ver;
continue;
}
}
if (ver.Sys_VerUtc > result.Sys_VerUtc)
{
result = ver;
}
}
return(false, result);
}
public void AddOneAtStartTest_2()
{
IEnumerable <int> orig = null;
var seq = orig.AddOneAtStart(102).ToArray();
Aver.AreEqual(1, seq.Length);
Aver.AreEqual(102, seq[0]);
}
