/// <summary>
/// Immutable clone db constructed here
/// </summary>
/// <param name="msg"></param>
/// <param name="msgid"></param>
/// <param name="value"></param>
/// <param name="lstChi"></param>
private void ImmutableCloneDb(string msg, out string msgid, out string value, out List<int> lstChi)
{
Write("\n Creation of immutable database from query");
WriteLine();
bool status = false; value = "";
DBElement<string, string> elem = new DBElement<string, string>();
XDocument doc = XDocument.Load(new StringReader(msg));
msgid = doc.Descendants("MessageID").Select(i => i).Single().Value;
int key = int.Parse(doc.Descendants("Key").Select(i => i).Single().Value);
WriteLine("..Creation of new immutable Database from compound queries..\n");
WriteLine("..First we will retrieve the results from the main DB..\n");
DBElement<int, string> elem1 = new DBElement<int, string>();
WriteLine("\n\n..Getting the children of specific key..\n");
status = query.getChildren(db, key, out elem1); //get the children based on the key provided
DBFactoryGen<int, string> el = new DBFactoryGen<int, string>();
WriteLine("\n..Children with Key {0} successfully retrieved..\n", key);
WriteLine(" Key : {0}", key);
elem1.showChildren(); //show the child elements
lstChi = new List<int>();
WriteLine("\n..We will store the same in a immutable DB..\n");
if (elem1 != null && elem1.children != null)
{
foreach (var i in elem1.children)
{
lstChi.Add(i);
}
}
}
/// <summary>
/// Creation of a new immutable database constructed from the result of any query that returns a collection of keys
/// </summary>
public void ImmutableDB(string msg, ref string msgid)
{
try
{
string value;
List<int> lstChi;
ImmutableCloneDb(msg, out msgid, out value, out lstChi);
DBFactoryGen<int, DBElement<int, string>> clon = new DBFactoryGen<int, DBElement<int, string>>();
clon.CloneDB(lstChi); //clone the Db
WriteLine("..The results have been stored in a Immutable DB can be verified in Line 20 of DBFactoryClass..\n");
WriteLine("..The DB cannot be edited or will not change over time.\n");
WriteLine("DB is immutable since there are no insert or edit methods\n");
WriteLine("..The results are now being retreived from Immutable DB..\n");
int j = 0;
WriteLine("***************************************************************************************************************\n");
WriteLine(" IMMUTABLE DATABASE \n");
foreach (var i in lstChi)
{
clon.getValue(j, out value); //get the value from the immutable Db
WriteLine("Key : {0} , Value : {1} \n", j, value);
j++;
}
WriteLine("***************************************************************************************************************\n");
}
catch (CustomException)
{
WriteLine("Error in immutable db \n");
}
}
