//<----------------------Load database from an XML file.
XElement load_database <Key, Data>(XElement request_msg, DBEngine <Key, DBElement <Key, Data> > db)
{
Console.Write("\n Request to Load Database from XML file at: ");
try
{
//string pat = request_msg.Element("Pattern").Value;
//Console.WriteLine(" with pattern - \"{0}\" present in metadata.", pat);
PersistEngine pe = new PersistEngine();
string file_name = request_msg.Element("File_Name").Value;
Console.WriteLine("{0}", file_name.Substring(13));
pe.loadDB <Key, DBElement <Key, Data>, Data>(db, file_name);
XElement response_msg = new XElement("Query_Response");
XElement type = new XElement("Query_Type", "Load Database");
string reply = "Loaded database from XML file saved at " + file_name.Substring(13);
XElement result = new XElement("Result", reply);
response_msg.Add(type);
response_msg.Add(result);
return(result);
}
catch (Exception)
{
Console.WriteLine("\n XML file for request message is not in the expected format. A particular tag could not be found.");
XElement response_msg = new XElement("Result", "Could not insert element into database");
return(request_msg);
}
}
public void performOperations(DBEngine <string, DBElement <string, List <string> > > testDict, DBElement <string, List <string> > value)
{ /*----------Perform operations as per the input given in the XML document--------------*/
if (value.operation == "addition")
{
testDict.insert(value.key, value); //insert the key/value pairs to the main database
string s = "Database after inserting key " + value.key + " is";
printDatabase(testDict, s);
}
if (value.operation == "edit")
{
testDict.saveValue(value.key, value); //edit the value for the given key
string s = "Database after editing key " + value.key + " is";
printDatabase(testDict, s);
}
if (value.operation == "delete")
{
testDict.delete(value.key); //delete the key/value pair
string s = "Database after deleting key " + value.key + " is";
printDatabase(testDict, s);
}
if (value.operation == "persist database")
{
PersistEngine <string, DBElement <string, List <string> > > persist = new PersistEngine <string, DBElement <string, List <string> > >(testDict);
var keys = testDict.Keys();
persist.persistToXMLListPayload(keys);
printDatabase(testDict, "Persisted database is:");
}
if (value.operation == "Query value")
{
DBElement <string, List <string> > valueOfKey = testDict.getValueOfKey(value.key);
printQuery("Querying the database for value of key " + value.key + " is");
Console.WriteLine("\n\nThe value of the Key {0} is:\n", value.key);
valueOfKey.showEnumerableElement();
}
if (value.operation == "Query children")
{
QueryEngine <string, DBElement <string, List <string> > > qEngine = new QueryEngine <string, DBElement <string, List <string> > >(testDict);
printQuery("Querying the database for value of key " + value.key + " is");
List <string> children = qEngine.getChildrenOfKey(value.key);
Console.WriteLine("\nThe children of the Key {0} are:\n", value.key);
displayChildren(children);
}
if (value.operation == "Augment database")
{
PersistEngine <string, DBElement <string, List <string> > > persist = new PersistEngine <string, DBElement <string, List <string> > >(testDict);
string fileName = "C:\\Users\\rakeshh91\\Documents\\Rakesh Documents\\Class Materials\\SMA\\Assignments\\Assignment 4 - Implementation\\CommPrototype\\augmentDatabase.xml";
persist.augmentDatabaseFromXMLStringList(testDict, fileName);
printDatabase(testDict, "Database after augmenting is:");
}
}
static void Main(string[] args)
{
"Testing PersistEngine Package".title('=');
WriteLine();
DBEngine <int, DBElement <int, string> > db = new DBEngine <int, DBElement <int, string> >();
"\nSave to an XML file".title();
PersistEngineTest p1 = new PersistEngineTest();
p1.insertData(db);
dynamic allKeys = db.Keys();
PersistEngine <int, DBElement <int, string> > pEngine = new PersistEngine <int, DBElement <int, string> >(db);
pEngine.persistToXML(allKeys);
WriteLine("\n\nAbove database is stored as XML file in local machine");
WriteLine();
WriteLine("\nThe persisted XML file along with new key/value pairs are augmented to the database.\n");
WriteLine("Below shown key/value pairs are augmented to the database.\n");
pEngine.augmentDatabaseFromXML(db); //Augment the persisted database along with new values to the main database
pEngine.persistToXML(allKeys);
db.showDB();
WriteLine();
WriteLine();
"\nPersist database every 5 seconds until its cancelled".title();
WriteLine();
pEngine.scheduledSaveDatabase();
WriteLine();
WriteLine();
"\nProject dependancy and realtionships".title();
WriteLine();
DBEngine <string, DBElement <string, List <string> > > dependancyDb = new DBEngine <string, DBElement <string, List <string> > >();
PersistEngine <string, DBElement <string, List <string> > > pEngineString = new PersistEngine <string, DBElement <string, List <string> > >(dependancyDb);
try
{
Console.WriteLine("\nBelow details provide information on dependancy of every package in the project\n");
pEngine.displayDependancy();
dependancyDb.showEnumerableDB();
WriteLine();
}
catch (Exception e)
{
WriteLine("\n" + e.Message + "\n");
}
}
static void Main(string[] args)
{
//test stun for persist engine
"Testing PersistEngine Package".title();
WriteLine();
PersistEngine <int, string> persistEngine = new PersistEngine <int, string>();
"Testing Persist Engine Package".title('=');
DBElement <int, string> elem = new DBElement <int, string>();
DBEngine <int, DBElement <int, string> > dbEngine = new DBEngine <int, DBElement <int, string> >();
//creating metdata
"Metadata with data dictionary is ".title();
elem.name = "X";
elem.descr = "description";
elem.timeStamp = DateTime.Parse("09/20/2015 11:36:58 PM");
elem.children = new List <int> {
2, 3, 4
};
elem.payload = "payload";
dbEngine.insert(1, elem);
elem = new DBElement <int, string>();
elem.name = "XX";
elem.descr = "description";
elem.timeStamp = DateTime.Now;
elem.children = new List <int> {
5, 6, 7
};
elem.payload = "payload";
dbEngine.insert(12, elem);
dbEngine.showDB();
//persisting metadata into XML
"Write in-memory database in XML file, please check DataPersistTest.xml file in Path:./PersistEngine/bin/debug.".title('-');
persistEngine.persistXML(dbEngine);
"Deleting in-memory database".title('-');
dbEngine.Dictionary.Clear();
"Database restored or augmented from an existing XML (DataPersistTest.xml) file".title('-');
persistEngine.retrieveDataFromXMLTypeTwo(dbEngine, "DataPersistTest.xml", 10);
dbEngine.showDB();
WriteLine();
Write("\n\n");
}
static void Main(string[] args)
{
"Testing DBExtensions Package".title('=');
WriteLine();
DBElement <int, string> elem1 = new DBElement <int, string>("Element-7", "Description of Element-7");
elem1.payload = "Payload of element-7.";
elem1.children.AddRange(new List <int> {
8, 9
});
DBElement <int, string> elem2 = new DBElement <int, string>("Element-8", "Description of Element-8");
//elem2.payload = "Payload of element-8.";
DBElement <int, string> elem3 = new DBElement <int, string>("Element-9", "Description of Element-9");
elem3.payload = "Payload of element-3.";
DBEngine <int, DBElement <int, string> > db = new DBEngine <int, DBElement <int, string> >();
db.insert(7, elem1);
db.insert(8, elem2);
db.insert(9, elem3);
Write(" Created a new dataBase with following contents:");
db.showDB();
WriteLine("\n\n Now going to persist the database contents to an XML file.");
PersistEngine pe = new PersistEngine();
string file_name = pe.persistDB <int, DBElement <int, string>, string>(db);
WriteLine(" Database contents are saved as - {0}", file_name);
WriteLine("\n Going to remove all DB elements and load the xml file saved above.");
db.remove(7);
db.remove(8);
db.remove(9);
WriteLine(" DB contents before calling load-DB");
db.showDB();
WriteLine(" Now send command to load database from the XML file.");
pe.loadDB <int, DBElement <int, string>, string>(db, file_name);
Write(" DB contents after calling load-DB ");
db.showDB();
DBEngine <string, DBElement <string, List <string> > > db2 = new DBEngine <string, DBElement <string, List <string> > >();
Write("\n\n --- DBElement<string,List<string>> ---");
DBElement <string, List <string> > elem_str = new DBElement <string, List <string> >();
elem_str.name = "Element-One";
elem_str.descr = "DB Element whose key type is string and payload type is List of strings.";
elem_str.timeStamp = DateTime.Now;
elem_str.children = new List <string> {
"Two", "Three", "Four"
};
elem_str.payload = new List <string> {
"Element payload is of type List of strings.", "This is string two.", "And third"
};
elem_str.showEnumerableElement();
db2.insert("One", elem_str);
Write("\n\n --- DBEngine<string,List<string>> ---");
db2.showEnumerableDB();
XElement noSqlDb = new XElement("NoSqlDb");
XElement keyType = new XElement("KeyType", typeof(int));
XElement payloadType = new XElement("PayloadType", typeof(string));
XElement request_msg = new XElement("Request_Message");
XElement req_type = new XElement("Request_Type", "Insert");
XElement key = new XElement("Key", 45);
XElement name = new XElement("Name", "element_one");
XElement descr = new XElement("Description", "Descr of element_one");
XElement payload = new XElement("Payload", "This the payload of element one.");
request_msg.Add(req_type);
request_msg.Add(key);
request_msg.Add(name);
request_msg.Add(descr);
request_msg.Add(payload);
Console.WriteLine("Message = \n{0}", request_msg.ToString());
XElement Rmsg = XElement.Parse(request_msg.ToString());
string Rtype = Rmsg.Element("Request_Type").Value;
Console.WriteLine("Request type = {0}", Rtype);
XElement abc = new XElement("dummy");
XElement result = new XElement("Result", "Success");
//Console.WriteLine("abc= {0}\nresult = {1}\n", abc.ToString(), result.ToString());
//abc = result;
Console.WriteLine("abc= {0}\nresult = {1}", abc.ToString(), result.ToString());
int k = 5;
string ts = "Could not find element with key " + k.ToString() + " in database";
//XElement tst = new XElement("Result", "Could not find element with key {0} in database", k);
XElement tst = new XElement("Result", ts);
Console.WriteLine("tst = {0}", tst.ToString());
XElement qry = new XElement("Query_Response");
XElement par = new XElement("Partial", "This is \njust payload");
qry.Add(tst);
qry.Add(par);
Console.WriteLine("qry = \n{0}", qry.ToString());
Console.WriteLine("value of qry response =\n{0}", qry.Value.ToString());
//noSqlDb.Add(keyType);
//noSqlDb.Add(payloadType);
//Console.WriteLine("\nString mesage = \n{0}", noSqlDb.ToString());
//string xml_string = noSqlDb.ToString();
//XElement abc = XElement.Parse(xml_string);
//XElement root = abc.Element("KeyType");
//Console.WriteLine("abc= {0}", abc.ToString());
//Console.WriteLine("root= {0}", root.ToString());
//elem.name = xml_dbElement.Element("Name").Value;
//string par = root.Value;
//Console.WriteLine("par = {0}", par);
}
