// function to getchildren
public XElement getchildren(XElement dbe, DBEngine <int, DBElement <int, string> > db, QueryEngine QE)
{
Console.WriteLine("\n The children List is obtained ");
QE.querychildren <int, DBElement <int, string>, string>(db, 1);
if (QE.Equals(null))
{
XElement f = new XElement("result", " no children in list ");
return(f);
}
else
{
XElement s = new XElement("result", " children obtained from the specified key ");
return(s);
}
}
// function to edit instances
public static bool editInstance <Key, Value, Data>(this DBEngine <Key, Value> dbedit, Key key1, Data new_instance)
{
Value value;
if (dbedit.getValue(key1, out value))
{
DBElement <Key, Data> elem = value as DBElement <Key, Data>;
elem.payload = new_instance;
return(true);
}
else
{
return(false);
}
}
public Value queryvalue <Key, Value, Data>(DBEngine <Key, Value> db, Key key)
{
Value getqueryvalue;
bool key_present = db.getValue(key, out getqueryvalue);
if (key_present) // check if key is present
{
return(getqueryvalue); //if present return value
}
else
{
Console.WriteLine("key not present"); // else error message
}
return(default(Value));
}
// Function to perform editing of name in metedata
public static bool editName <Key, Value, Data>(this DBEngine <Key, Value> dbedit, Key key1, string new_name)
{
Value value;
if (dbedit.getValue(key1, out value))
{
DBElement <Key, Data> elem = value as DBElement <Key, Data>;
elem.name = new_name;
return(true);
}
else
{
return(false);
}
}
public List <key> querychildren <key, value, Data>(DBEngine <key, value> db, key Key)
{
value getqueryvalue;
bool key_present = db.getValue(Key, out getqueryvalue); // check if key present
DBElement <key, Data> temp = getqueryvalue as DBElement <key, Data>; // create new element to store value
if (key_present)
{
return(temp.children);
}
else
{
Console.WriteLine("invalid key"); // if key not present error message
}
return(null);
}
//function to getvalue
public XElement getvalue(XElement dbe, DBEngine <int, DBElement <int, string> > db, QueryEngine QE)
{
Console.WriteLine("\n value of the particular key is returned ");
DBElement <int, string> dbelem = new DBElement <int, string>();
QE.queryvalue <int, DBElement <int, string>, string>(db, 2);
if (QE.Equals(null))
{
XElement f = new XElement("result", "\n no key present ");
return(f);
}
else
{
XElement s = new XElement("result", "\n Value obtained ");
return(s);
}
}
{ // Function to perform addition of relationships
public static bool addRelations <Key, Value, Data>(this DBEngine <Key, Value> dbedit, Key key1, Key key2)
{
Value val1, val2;
bool key1_present = dbedit.getValue(key1, out val1);
// check if key1 is present
if (key1_present)
{
bool key2_present = dbedit.getValue(key2, out val2);
// check if key2 is present
if (key2_present)
{
DBElement <Key, Data> element = val1 as DBElement <Key, Data>;
element.children.Add(key1);
}
}
return(true);
}
//function to edit description
public XElement editdescr(XElement dbe, DBEngine <int, DBElement <int, string> > db)
{
Console.Write("\n ----------Edit description Operation----------");
Console.Write("\nediting the description of key= 4");
Console.WriteLine("\n");
Console.WriteLine("\n Bachelors changed to BE ");
bool result = db.editDescr <int, DBElement <int, string>, string>(Int32.Parse((dbe.Element("key").Value)), " BE ");
db.showDB();
if (result == true)
{
XElement t = new XElement("result", "\n element edited successfully ");
return(t);
}
else
{
XElement f = new XElement("result", " Editing Failure ");
return(f);
}
}
// function to edit name
public XElement EditName(XElement dbe, DBEngine <int, DBElement <int, string> > db)
{
Console.Write("\n----------Edit Operation----------");
Console.Write("\nediting the name of key==5");
Console.WriteLine("\n name :Dogs is changed to Cats");
bool result = db.editName <int, DBElement <int, string>, string>(Int32.Parse((dbe.Element("key").Value)), "Cats");
db.showDB();
Console.WriteLine("\n");
if (result == true)
{
XElement t = new XElement("result", "\n element edited successfully ");
return(t);
}
else
{
XElement f = new XElement("result", " failure ");
return(f);
}
}
// function to delete from database
public XElement Delete(XElement dbe, DBEngine <int, DBElement <int, string> > db)
{
DBElement <int, string> elem = new DBElement <int, string>();
Console.WriteLine("\n----------Delete Operation----------");
Console.Write("\n Now deleting the element with key=3");
bool result = db.remove(Int32.Parse((dbe.Element("key").Value)));
db.showDB();
if (result == true)
{
XElement s = new XElement("result", "\n Element deleted successfully ");
return(s);
}
else
{
XElement f = new XElement("result", "Failure");
return(f);
}
}
// main method to test DBExtensions package
static void Main(string[] args)
{
"Testing DBExtensions Package".title('=');
WriteLine();
// creation of new element
Write("\n --- Test DBElement<int,string> ---");
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.payload = "a payload";
Write(elem1.showElement <int, string>());
// creation of new database
DBEngine <int, DBElement <int, string> > dbs = new DBEngine <int, DBElement <int, string> >();
dbs.insert(1, elem1);
dbs.show <int, DBElement <int, string>, string>();
WriteLine();
Write("\n --- Test DBElement<string,List<string>> ---");
// creation of new element
DBElement <string, List <string> > newelem1 = new DBElement <string, List <string> >();
newelem1.name = "newelem1";
newelem1.descr = "test new type";
newelem1.children = new List <string> {
"Key1", "Key2"
};
newelem1.payload = new List <string> {
"one", "two", "three"
};
Write(newelem1.showElement <string, List <string>, string>());
DBEngine <string, DBElement <string, List <string> > > dbe = new DBEngine <string, DBElement <string, List <string> > >();
dbe.insert("key1", newelem1);
dbe.show <string, DBElement <string, List <string> >, List <string>, string>();
Write("\n\n");
}
// test stub for processor
// main function
static void Main(string[] args)
{
DBEngine <int, DBElement <int, string> > db = new DBEngine <int, DBElement <int, string> >();
"Testing the Package".title('=');
Console.WriteLine();
Console.WriteLine("\n remote operations are done are and tested");
Console.Write("\n");
DBElement <int, string> elem = new DBElement <int, string>();
Console.WriteLine("\n----------Delete Operation----------");
Console.Write("\n Now deleting the element with key=3");
bool result = db.remove(2);
db.showDB();
if (result == true)
{
XElement s = new XElement("result", "\n Element deleted successfully ");
}
else
{
XElement f = new XElement("result", "Failure");
}
}
public static void showEnumerableDB(this DBEngine <string, DBElement <string, List <string> > > db)
{
db.show <string, DBElement <string, List <string> >, List <string>, string>();
}
static void Main(string[] args)
{
"Testing ItemEditor Package".title('=');
WriteLine();
Write("\n --- Test DBElement<int,string> ---");
// new database created to test the functionaity
DBEngine <int, DBElement <int, string> > db = new DBEngine <int, DBElement <int, string> >();
// new elements are created and inserted to the database
DBElement <int, string> elem1 = new DBElement <int, string>("first element", "first element description");
DBElement <int, string> elem2 = new DBElement <int, string>("second element", "second element description");
DBElement <int, string> elem3 = new DBElement <int, string>("third element", "third element description");
elem1.payload = "Payload of 1";
elem1.children.AddRange(new List <int> {
1, 2, 3
});
elem2.payload = "Payload of 2";
elem2.children.AddRange(new List <int> {
11, 22, 33
});
elem3.payload = "Payload of 3";
elem3.children.AddRange(new List <int> {
111, 222, 333
});
// inserting elements to database
db.insert(1, elem1);
db.insert(2, elem2);
db.insert(3, elem3);
db.showDB();
// testing addition of relationships to elements
Write("\n\n Testing of addition of new relationships");
bool addr1 = db.addRelations <int, DBElement <int, string>, string>(1, 2);
bool addr2 = db.addRelations <int, DBElement <int, string>, string>(2, 3);
bool addr3 = db.addRelations <int, DBElement <int, string>, string>(3, 111);
db.showDB();
// testing removing relationships to elements
Write("\n\n Testing of removal of relations");
bool remr1 = db.removeRelation <int, DBElement <int, string>, string>(2, 11);
bool remr2 = db.removeRelation <int, DBElement <int, string>, string>(1, 3);
db.showDB();
if (remr1 && remr2)
{
Write("\n \n Removal succeded");
}
// Testing editing of text data
Write("\n\n Testing of editing of text data");
bool ed_name1 = db.editName <int, DBElement <int, string>, string>(1, "renaming of element 1");
bool ed_descr = db.editDescr <int, DBElement <int, string>, string>(1, "editing description of element 1");
bool ed_inst = db.editInstance <int, DBElement <int, string>, string>(1, "new instance for element 1");
db.showDB();
Write("\n\n --- Test DBElement<string,List<string>> ---");
// creating elements to new database of type string,List of strings
DBElement <string, List <string> > new_elem1 = new DBElement <string, List <string> >("new element 1", "Description of 1");
DBElement <string, List <string> > new_elem2 = new DBElement <string, List <string> >("new element 2", "Description of 2");
DBElement <string, List <string> > new_elem3 = new DBElement <string, List <string> >("new element 3", "Description of 3");
//creating new database
DBEngine <string, DBElement <string, List <string> > > new_db = new DBEngine <string, DBElement <string, List <string> > >();
new_elem1.payload = new List <string> {
"First data in payload ", "Second data in payload", "Third data in payload"
};
new_elem1.children.AddRange(new List <string> {
"one", "two", "three"
});
new_elem2.payload = new List <string> {
"DP", "SMA", "OOD"
};
new_elem2.children.AddRange(new List <string> {
"four", "five", "six"
});
new_elem3.payload = new List <string> {
"CE", "CS", "EE"
};
new_elem3.children.AddRange(new List <string> {
"seven", "eight", "nine"
});
// inserting elements to database
new_db.insert("One", new_elem1);
new_db.insert("Two", new_elem2);
new_db.insert("Three", new_elem3);
new_db.showEnumerableDB();
// testing addition of relationships to elements
Write("\n\n testing addition of relationship ");
bool add1 = new_db.addRelations <string, DBElement <string, List <string> >, List <string> >("One", "two");
bool add2 = new_db.addRelations <string, DBElement <string, List <string> >, List <string> >("Two", "three");
bool add3 = new_db.addRelations <string, DBElement <string, List <string> >, List <string> >("Three", "one");
new_db.showEnumerableDB();
if (add1 && add2 && add3)
{
Write("\n \n Adding relationship successful.");
}
// testing removing relationships to elements
Write("\n \n Now going to test removing of relationships in DB-element: Element-One");
bool rem1 = new_db.removeRelation <string, DBElement <string, List <string> >, List <string> >("One", "Nine");
bool rem2 = new_db.removeRelation <string, DBElement <string, List <string> >, List <string> >("One", "two");
new_db.showEnumerableDB();
if (rem1 && rem2)
{
Write("\n \n Deleting of relationships succeeded ");
}
// Testing editing of text data
Write("\n \n Now going to test edition of name, description and replacing instance of payload with new instance in Element-One.");
new_db.editName <string, DBElement <string, List <string> >, List <string> >("One", "Edited name for Element-One");
new_db.editDescr <string, DBElement <string, List <string> >, List <string> >("One", "New description for Element-One");
new_db.editInstance <string, DBElement <string, List <string> >, List <string> >("One", new List <string> {
"New payload - String One", "New payload - String Two", "New payload - String Three"
});
new_db.showEnumerableDB();
WriteLine();
}
static void Main(string[] args)
{
"Testing DBEngine Package".title('=');;
WriteLine();
"Test db of scalar elements".title();
WriteLine();
//creation of new elements
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.payload = "a payload";
DBElement <int, string> elem2 = new DBElement <int, string>("Darth Vader", "Evil Overlord");
elem2.payload = "The Empire strikes back!";
var elem3 = new DBElement <int, string>("Luke Skywalker", "Young HotShot");
elem3.payload = "X-Wing fighter in swamp - Oh oh!";
if (verbose)
{
Write("\n --- Test DBElement<int,string> ---");
WriteLine();
elem1.showElement();
WriteLine();
elem2.showElement();
WriteLine();
elem3.showElement();
WriteLine();
}
Write("\n --- Test DBEngine<int,DBElement<int,string>> ---");
WriteLine();
int key = 0;
Func <int> keyGen = () => { ++key; return(key); }; // function to generate keys
// new database created
DBEngine <int, DBElement <int, string> > db = new DBEngine <int, DBElement <int, string> >();
bool p1 = db.insert(keyGen(), elem1);
bool p2 = db.insert(keyGen(), elem2);
bool p3 = db.insert(keyGen(), elem3);
if (p1 && p2 && p3)
{
Write("\n all inserts succeeded");
}
else
{
Write("\n at least one insert failed");
}
db.showDB();
WriteLine();
"Test db of enumerable elements".title();
WriteLine();
//new element created
DBElement <string, List <string> > newelem1 = new DBElement <string, List <string> >();
newelem1.name = "newelem1";
newelem1.descr = "test new type";
newelem1.payload = new List <string> {
"one", "two", "three"
};
//new element created
DBElement <string, List <string> > newerelem1 = new DBElement <string, List <string> >();
newerelem1.name = "newerelem1";
newerelem1.descr = "better formatting";
newerelem1.payload = new List <string> {
"alpha", "beta", "gamma"
};
newerelem1.payload.Add("delta");
newerelem1.payload.Add("epsilon");
//new element created
DBElement <string, List <string> > newerelem2 = new DBElement <string, List <string> >();
newerelem2.name = "newerelem2";
newerelem2.descr = "better formatting";
newerelem2.children.AddRange(new List <string> {
"first", "second"
});
newerelem2.payload = new List <string> {
"a", "b", "c"
};
newerelem2.payload.Add("d");
newerelem2.payload.Add("e");
if (verbose)
{
Write("\n --- Test DBElement<string,List<string>> ---");
WriteLine();
newelem1.showEnumerableElement();
WriteLine();
newerelem1.showEnumerableElement();
WriteLine();
newerelem2.showEnumerableElement();
WriteLine();
}
Write("\n --- Test DBEngine<string,DBElement<string,List<string>>> ---");
int seed = 0;
string skey = seed.ToString();
Func <string> skeyGen = () =>
{
++seed;
skey = "string" + seed.ToString();
skey = skey.GetHashCode().ToString();
return(skey);
};
DBEngine <string, DBElement <string, List <string> > > newdb =
new DBEngine <string, DBElement <string, List <string> > >();
newdb.insert(skeyGen(), newelem1);
newdb.insert(skeyGen(), newerelem1);
newdb.insert(skeyGen(), newerelem2);
newdb.showEnumerableDB();
Write("\n\n");
}
//Main function parses and sends the messages to server//
static void Main(string[] args)
{
Util.verbose = false;
Server srvr = new Server();
srvr.ProcessCommandLine(args);
Console.Title = "Server";
Console.Write(String.Format("\n Starting CommService server listening on port {0}", srvr.port));
Console.Write("\n ====================================================\n");
Sender sndr = new Sender(Util.makeUrl(srvr.address, srvr.port));
Receiver rcvr = new Receiver(srvr.port, srvr.address);
Action serviceAction = () => {
Message msg = null;
DBEngine <int, DBElement <int, string> > dbserver = new DBEngine <int, DBElement <int, string> >(); //new DBEngine
QueryEngine QE = new QueryEngine();
HiResTimer timer = new HiResTimer(); //new object for timer
while (true)
{
msg = rcvr.getMessage(); // note use of non-service method to deQ messages
Console.Write("\n Received message:");
Console.Write("\n sender is {0}", msg.fromUrl);
Console.Write("\n content is {0}\n", msg.content);
if (msg.content == "connection start message")
{
continue; // don't send back start message
}
if (msg.content == "done")
{
Console.Write("\n client has finished\n"); continue;
}
if (msg.content == "closeServer")
{
Console.Write("received closeServer"); break;
}
timer.Start(); //start timer
XElement insertelem = XElement.Parse(msg.content);
XElement res = new XElement("result", "not found");
processor rdbserver = new processor();
Console.WriteLine("\n----------write client operations----------");
Console.WriteLine("\n");
//----------select the required method to perform operations------------//
if (insertelem.Element("Type").Value.Equals("Insert"))
{
res = rdbserver.insert(insertelem, dbserver);
}
else if (insertelem.Element("Type").Value.Equals("Delete"))
{
res = rdbserver.Delete(insertelem, dbserver);
}
else if (insertelem.Element("Type").Value.Equals("EditName"))
{
res = rdbserver.EditName(insertelem, dbserver);
}
else if (insertelem.Element("Type").Value.Equals("getvalue"))
{
res = rdbserver.getvalue(insertelem, dbserver, QE);
}
else if (insertelem.Element("Type").Value.Equals("EditDescr"))
{
res = rdbserver.editdescr(insertelem, dbserver);
}
else if (insertelem.Element("Type").Value.Equals("getchildren"))
{
res = rdbserver.getchildren(insertelem, dbserver, QE);
}
else if (insertelem.Element("Type").Value.Equals("Persist"))
{
res = rdbserver.persistdb(insertelem, dbserver);
}
else
{
Console.Write(" operation failed ");
}
Console.WriteLine("\n-------------server response----------");
XElement response = new XElement("resonse");
response.Add(res);
timer.Stop(); //stop timer
Console.WriteLine("the time taken for operation is {0}", timer.ElapsedMicroseconds + " MicroSeconds ");
srvr.send_wpf_msg(timer.ElapsedMicroseconds, sndr);
Util.swapUrls(ref msg);
msg.content = response.ToString();
sndr.sendMessage(msg); //sending message
}
};
if (rcvr.StartService())
{
rcvr.doService(serviceAction); // This serviceAction is asynchronous so the call doesn't block.
}
Util.waitForUser();
}
public static void showDB(this DBEngine <int, DBElement <int, string> > db)
{
db.show <int, DBElement <int, string>, string>();
}
