private void btnConnect_Click(object sender, EventArgs e)
{
CConnectionContext cc = new CConnectionContext(txtHost.Text, 20901, txtUser.Text, txtPassword.Text);
m_spSqlite = new CSocketPool <CSqlite>(false);
//set event for MySQL/Mariadb database shutdown
m_spSqlite.SocketPoolEvent += new CSocketPool <CSqlite> .DOnSocketPoolEvent(m_spSqlite_SocketPoolEvent);
if (!m_spSqlite.StartSocketPool(cc, 1, 1))
{
txtMessage.Text = "No connection to " + txtHost.Text;
return;
}
CSqlite sqlite = m_spSqlite.AsyncHandlers[0];
//set event for tracking all database table update events, delete, update and insert
m_spSqlite.Sockets[0].Push.OnPublish += new DOnPublish(Push_OnPublish);
//create a DB session with default to sample database sakil
bool ok = sqlite.Open("sakila.db", null, DB_CONSTS.ENABLE_TABLE_UPDATE_MESSAGES);
m_ds = new DataSet("real-time cache");
DataTable dt = null;
string errMsg = "";
//query all cached tables into client side for intial cache data
ok = sqlite.Execute("", (h, ret, err_msg, affected, fail_ok, id) =>
{
//this callback is fired from worker thread from socket pool thread
ok = (ret == 0);
errMsg = err_msg;
}, (h, data) =>
{
//this callback is fired from worker thread from socket pool thread
CSqlite.AppendRowDataIntoDataTable(data, dt);
}, (h) =>
{
//this callback is fired from worker thread from socket pool thread
dt = CSqlite.MakeDataTable(h.ColumnInfo);
string name = h.ColumnInfo[0].DBPath + "." + h.ColumnInfo[0].TablePath;
dt.TableName = name;
m_ds.Tables.Add(dt);
});
ok = sqlite.WaitAll();
txtMessage.Text = errMsg;
lstTables.Items.Clear();
foreach (DataTable table in m_ds.Tables)
{
lstTables.Items.Add(table.TableName);
}
if (m_ds.Tables.Count > 0)
{
lstTables.SelectedIndex = 0;
}
btnDisconnect.Enabled = ok;
btnConnect.Enabled = !ok;
}
static void Main(string[] args)
{
Console.WriteLine("Remote host: ");
string host = Console.ReadLine();
CConnectionContext cc = new CConnectionContext(host, 20901, "usqlite_client", "pwd_for_usqlite");
using (CSocketPool <CSqlite> spSqlite = new CSocketPool <CSqlite>())
{
if (!spSqlite.StartSocketPool(cc, 1, 1))
{
Console.WriteLine("Failed in connecting to remote async sqlite server");
Console.WriteLine("Press any key to close the application ......");
Console.Read();
return;
}
CSqlite sqlite = spSqlite.Seek();
bool ok = sqlite.Open("", (handler, res, errMsg) =>
{
Console.WriteLine("res = {0}, errMsg: {1}", res, errMsg);
});
TestCreateTables(sqlite);
List <KeyValuePair <CDBColumnInfoArray, CDBVariantArray> > lstRowset = new List <KeyValuePair <CDBColumnInfoArray, CDBVariantArray> >();
ok = sqlite.BeginTrans();
TestPreparedStatements(sqlite, lstRowset);
InsertBLOBByPreparedStatement(sqlite, lstRowset);
ok = sqlite.EndTrans();
sqlite.WaitAll();
int index = 0;
Console.WriteLine();
Console.WriteLine("+++++ Start rowsets +++");
foreach (KeyValuePair <CDBColumnInfoArray, CDBVariantArray> it in lstRowset)
{
Console.Write("Statement index = {0}", index);
if (it.Key.Count > 0)
{
Console.WriteLine(", rowset with columns = {0}, records = {1}.", it.Key.Count, it.Value.Count / it.Key.Count);
}
else
{
Console.WriteLine(", no rowset received.");
}
++index;
}
Console.WriteLine("+++++ End rowsets +++");
Console.WriteLine();
Console.WriteLine("Press any key to close the application ......");
Console.Read();
}
}
static void Main(string[] args)
{
const int sessions_per_host = 2; const int cycles = 10000; string[] vHost = { "localhost", "192.168.2.172" };
using (CSocketPool <CSqlite> sp = new CSocketPool <CSqlite>()) {
sp.QueueName = "ar_sharp"; //set a local message queue to backup requests for auto fault recovery
CConnectionContext[,] ppCc = new CConnectionContext[1, vHost.Length *sessions_per_host]; //one thread enough
for (int n = 0; n < vHost.Length; ++n)
{
for (int j = 0; j < sessions_per_host; ++j)
{
ppCc[0, n *sessions_per_host + j] = new CConnectionContext(vHost[n], 20901, "AClientUserId", "Mypassword");
}
}
bool ok = sp.StartSocketPool(ppCc);
if (!ok)
{
Console.WriteLine("There is no connection and press any key to close the application ......");
Console.Read(); return;
}
string sql = "SELECT max(amount), min(amount), avg(amount) FROM payment";
Console.WriteLine("Input a filter for payment_id"); string filter = Console.ReadLine();
if (filter.Length > 0)
{
sql += (" WHERE " + filter);
}
var v = sp.AsyncHandlers;
foreach (var h in v)
{
ok = h.Open("sakila.db", (hsqlite, res, errMsg) => {
if (res != 0)
{
Console.WriteLine("Error code: {0}, error message: {1}", res, errMsg);
}
});
}
int returned = 0; double dmax = 0.0, dmin = 0.0, davg = 0.0;
SocketProAdapter.UDB.CDBVariantArray row = new SocketProAdapter.UDB.CDBVariantArray();
CAsyncDBHandler.DExecuteResult er = (h, res, errMsg, affected, fail_ok, lastId) => {
if (res != 0)
{
Console.WriteLine("Error code: {0}, error message: {1}", res, errMsg);
}
else
{
dmax += double.Parse(row[0].ToString());
dmin += double.Parse(row[1].ToString());
davg += double.Parse(row[2].ToString());
}
++returned;
};
CAsyncDBHandler.DRows r = (h, vData) => {
row.Clear(); row.AddRange(vData);
};
CSqlite sqlite = sp.SeekByQueue(); //get one handler for querying one record
ok = sqlite.Execute(sql, er, r); ok = sqlite.WaitAll();
Console.WriteLine("Result: max = {0}, min = {1}, avg = {2}", dmax, dmin, davg);
returned = 0; dmax = 0.0; dmin = 0.0; davg = 0.0;
Console.WriteLine("Going to get {0} queries for max, min and avg", cycles);
for (int n = 0; n < cycles; ++n)
{
sqlite = sp.SeekByQueue(); ok = sqlite.Execute(sql, er, r);
}
foreach (var h in v)
{
ok = h.WaitAll();
}
Console.WriteLine("Returned = {0}, max = {1}, min = {2}, avg = {3}", returned, dmax, dmin, davg);
Console.WriteLine("Press any key to close the application ......"); Console.Read();
}
}
static void Main(string[] args)
{
Console.WriteLine("Remote host: "); string host = Console.ReadLine();
CConnectionContext cc = new CConnectionContext(host, 20901, "usqlite_client", "pwd_for_usqlite");
using (CSocketPool <CSqlite> spSqlite = new CSocketPool <CSqlite>())
{
//start socket pool having 1 worker thread which hosts 2 non-blocking sockets
if (!spSqlite.StartSocketPool(cc, 2, 1))
{
Console.WriteLine("No connection to sqlite server and press any key to close the demo ......");
Console.Read(); return;
}
CSqlite sqlite = spSqlite.AsyncHandlers[0];
//Use the above bad implementation to replace original SocketProAdapter.ClientSide.CAsyncDBHandler.Open method
//at file socketpro/src/SproAdapter/asyncdbhandler.cs for cross SendRequest dead lock demonstration
Console.WriteLine("Doing Demo_Cross_Request_Dead_Lock ......");
Demo_Cross_Request_Dead_Lock(sqlite);
//create two tables, COMPANY and EMPLOYEE
TestCreateTables(sqlite);
bool ok = sqlite.WaitAll();
Console.WriteLine("{0} created, opened and shared by multiple sessions", sample_database); Console.WriteLine();
//make sure all other handlers/sockets to open the same database mysample.db
CSqlite[] vSqlite = spSqlite.AsyncHandlers;
for (int n = 1; n < vSqlite.Length; ++n)
{
vSqlite[n].Open(sample_database, (handler, res, errMsg) =>
{
if (res != 0)
{
Console.WriteLine("Open: res = {0}, errMsg: {1}", res, errMsg);
}
}); ok = vSqlite[n].WaitAll();
}
//execute manual transactions concurrently with transaction overlapping on the same session
var tasks = new[] {
Task.Factory.StartNew(Demo_Multiple_SendRequest_MultiThreaded_Wrong, spSqlite),
Task.Factory.StartNew(Demo_Multiple_SendRequest_MultiThreaded_Wrong, spSqlite),
Task.Factory.StartNew(Demo_Multiple_SendRequest_MultiThreaded_Wrong, spSqlite)
}; Demo_Multiple_SendRequest_MultiThreaded_Wrong(spSqlite); Task.WaitAll(tasks);
Console.WriteLine("Demo_Multiple_SendRequest_MultiThreaded_Wrong completed"); Console.WriteLine();
//execute manual transactions concurrently without transaction overlapping on the same session by lock/unlock
tasks = new[] {
Task.Factory.StartNew(Demo_Multiple_SendRequest_MultiThreaded_Correct_Lock_Unlock, spSqlite),
Task.Factory.StartNew(Demo_Multiple_SendRequest_MultiThreaded_Correct_Lock_Unlock, spSqlite),
Task.Factory.StartNew(Demo_Multiple_SendRequest_MultiThreaded_Correct_Lock_Unlock, spSqlite)
}; Demo_Multiple_SendRequest_MultiThreaded_Correct_Lock_Unlock(spSqlite); Task.WaitAll();
Console.WriteLine("Demo_Multiple_SendRequest_MultiThreaded_Correct_Lock_Unlock completed"); Console.WriteLine();
Console.WriteLine("Demonstration of DoFuture .....");
if (!DoFuture(spSqlite).Wait(5000))
{
Console.WriteLine("The requests within the function DoFuture are not completed in 5 seconds");
}
else
{
Console.WriteLine("All requests within the function DoFuture are completed");
}
Console.WriteLine();
Console.WriteLine("Press any key to close the application ......"); Console.Read();
}
}
static void Main(string[] args)
{
Console.WriteLine("Remote host: ");
string host = Console.ReadLine();
Console.WriteLine("Table name: ");
string tableName = Console.ReadLine();
Console.WriteLine("sql filter: ");
string filter = Console.ReadLine();
CConnectionContext cc = new CConnectionContext(host, 20901, "usqlite_client", "pwd_for_sqlite");
Console.WriteLine("Asynchronous execution (0) or synchronous execution (1) ?");
bool sync = (Console.ReadKey().KeyChar != '0');
using (CSocketPool <CSqlite> spSqlite = new CSocketPool <CSqlite>())
{
if (!spSqlite.StartSocketPool(cc, 1))
{
Console.WriteLine("Failed in connecting to remote helloworld server");
Console.WriteLine("Press any key to close the application ......");
Console.Read();
return;
}
Console.WriteLine("");
Console.WriteLine("Computing ......");
CSqlite sqlite = spSqlite.Seek();
CAsyncDBHandler.DResult dr = (handler, res, errMsg) =>
{
if (res != 0)
{
Console.WriteLine("res = {0}, errMsg: {1}", res, errMsg);
}
};
uint obtained = 0;
bool ok = sqlite.Open("sakila.db", dr);
#if USE_DATATABLE
List <KeyValuePair <CDBColumnInfoArray, DataTable> > ra = new List <KeyValuePair <CDBColumnInfoArray, DataTable> >();
#else
List <KeyValuePair <CDBColumnInfoArray, CDBVariantArray> > ra = new List <KeyValuePair <CDBColumnInfoArray, CDBVariantArray> >();
#endif
CAsyncDBHandler.DExecuteResult er = (handler, res, errMsg, affected, fail_ok, id) =>
{
if (res != 0)
{
Console.WriteLine("fails = {0}, oks = {1}, res = {2}, errMsg: {3}", (uint)(fail_ok >> 32), (uint)fail_ok, res, errMsg);
}
ra.Clear();
++obtained;
};
CAsyncDBHandler.DRows r = (handler, rowData) =>
{
//rowset data come here
int last = ra.Count - 1;
#if USE_DATATABLE
KeyValuePair <CDBColumnInfoArray, DataTable> item = ra[last];
CAsyncDBHandler.AppendRowDataIntoDataTable(rowData, item.Value);
#else
KeyValuePair <CDBColumnInfoArray, CDBVariantArray> item = ra[last];
item.Value.AddRange(rowData);
#endif
};
CAsyncDBHandler.DRowsetHeader rh = (handler) =>
{
//rowset header comes here
#if USE_DATATABLE
DataTable dt = CAsyncDBHandler.MakeDataTable(handler.ColumnInfo);
KeyValuePair <CDBColumnInfoArray, DataTable> item = new KeyValuePair <CDBColumnInfoArray, DataTable>(handler.ColumnInfo, dt);
#else
KeyValuePair <CDBColumnInfoArray, CDBVariantArray> item = new KeyValuePair <CDBColumnInfoArray, CDBVariantArray>(handler.ColumnInfo, new CDBVariantArray());
#endif
ra.Add(item);
};
ok = sqlite.WaitAll();
obtained = 0;
string sql = "select * from " + tableName;
if (filter.Length > 0)
{
sql += " where " + filter;
}
uint count = 10000;
DateTime start = DateTime.Now;
for (uint n = 0; n < count; ++n)
{
ok = sqlite.Execute(sql, er, r, rh);
if (sync && ok)
{
ok = sqlite.WaitAll();
}
if (!ok)
{
break;
}
}
if (!sync && ok)
{
ok = sqlite.WaitAll();
}
double diff = (DateTime.Now - start).TotalMilliseconds;
Console.WriteLine("Time required = {0} milliseconds for {1} query requests", diff, obtained);
//you need to compile and run the sample project test_sharp before running the below code
ok = sqlite.Open("", dr); //open a global database at remote server
ok = sqlite.Execute("delete from company where id > 3");
string sql_insert_parameter = "INSERT INTO company(ID,NAME,ADDRESS,Income)VALUES(?,?,?,?)";
ok = sqlite.Prepare(sql_insert_parameter, dr);
ok = sqlite.WaitAll();
int index = 0;
count = 50000;
Console.WriteLine();
Console.WriteLine("Going to insert {0} records into the table mysqldb.company", count);
start = DateTime.Now;
CDBVariantArray vData = new CDBVariantArray();
ok = sqlite.BeginTrans();
for (int n = 0; n < count; ++n)
{
vData.Add(n + 4);
int data = (n % 3);
switch (data)
{
case 0:
vData.Add("Google Inc.");
vData.Add("1600 Amphitheatre Parkway, Mountain View, CA 94043, USA");
vData.Add(66000000000.12);
break;
case 1:
vData.Add("Microsoft Inc.");
vData.Add("700 Bellevue Way NE- 22nd Floor, Bellevue, WA 98804, USA");
vData.Add(93600000001.24);
break;
default:
vData.Add("Apple Inc.");
vData.Add("1 Infinite Loop, Cupertino, CA 95014, USA");
vData.Add(234000000002.17);
break;
}
++index;
//send 2000 sets of parameter data onto server for processing in batch
if (2000 == index)
{
ok = sqlite.Execute(vData, er);
ok = sqlite.EndTrans();
vData.Clear();
Console.WriteLine("Commit {0} records into the table mysqldb.company", index);
ok = sqlite.BeginTrans();
index = 0;
}
}
if (vData.Count > 0)
{
ok = sqlite.Execute(vData, er);
Console.WriteLine("Commit {0} records into the table mysqldb.company", index);
}
ok = sqlite.EndTrans();
ok = sqlite.WaitAll();
diff = (DateTime.Now - start).TotalMilliseconds;
Console.WriteLine("Time required = {0} milliseconds for {1} insert requests", diff, count);
Console.WriteLine("Press any key to close the application ......");
Console.ReadLine();
}
}
static void Main(string[] args)
{
Console.WriteLine("Remote host: ");
string host = Console.ReadLine();
CConnectionContext cc = new CConnectionContext(host, 20901, "usqlite_client", "password_for_usqlite");
using (CSocketPool <CSqlite> spSqlite = new CSocketPool <CSqlite>())
{
//start a socket pool with 1 thread hosting 1 non-blocking socket
if (!spSqlite.StartSocketPool(cc, 1, 1))
{
Console.WriteLine("Failed in connecting to remote async sqlite server");
Console.WriteLine("Press any key to close the application ......");
Console.Read();
return;
}
CSqlite sqlite = spSqlite.Seek();
//open a global database at server side because an empty string is given
bool ok = sqlite.Open("", (handler, res, errMsg) =>
{
Console.WriteLine("res = {0}, errMsg: {1}", res, errMsg);
});
//prepare two test tables, COMPANY and EMPLOYEE
TestCreateTables(sqlite);
//a container for receiving all tables data
List <KeyValuePair <CDBColumnInfoArray, CDBVariantArray> > lstRowset = new List <KeyValuePair <CDBColumnInfoArray, CDBVariantArray> >();
ok = sqlite.BeginTrans(); //start manual transaction
//test both prepare and query statements
TestPreparedStatements(sqlite, lstRowset);
//test both prepare and query statements involved with reading and updating BLOB and large text
InsertBLOBByPreparedStatement(sqlite, lstRowset);
ok = sqlite.EndTrans(); //end manual transaction
sqlite.WaitAll();
//display received rowsets
int index = 0;
Console.WriteLine();
Console.WriteLine("+++++ Start rowsets +++");
foreach (KeyValuePair <CDBColumnInfoArray, CDBVariantArray> it in lstRowset)
{
Console.Write("Statement index = {0}", index);
if (it.Key.Count > 0)
{
Console.WriteLine(", rowset with columns = {0}, records = {1}.", it.Key.Count, it.Value.Count / it.Key.Count);
}
else
{
Console.WriteLine(", no rowset received.");
}
++index;
}
Console.WriteLine("+++++ End rowsets +++");
Console.WriteLine();
Console.WriteLine("Press any key to close the application ......");
Console.Read();
}
}