I have a CLR stored proc and have a outer transactionscope and multiple inner Transactionscopes but when I run the code and the inner transactionscope does not call Complete it is still commmiting the insertion of data.
The inner TransactionScopes use RequiresNew.
Any ideas why, code below?
[code]
[Microsoft.SqlServer.Server.SqlProcedure]
public static void spCreateAllocations(int campaignid, string product, DateTime startdate, double rate, int numweeks, int bonuses, string umguser)
{
using (TransactionScope trans = new TransactionScope())
using (SqlConnection connection = new SqlConnection("context connection=true"))
{
string sql = "";
DateTime actualStart;
actualStart = GetActualStartDate(startdate);
connection.Open();
int hdrid = CreateAllocationHeader(connection, campaignid, rate, numweeks, bonuses, umguser);
sql = "SELECT * FROM VenuePanels WHERE SelectRow<>0";
SqlDataAdapter adp = new SqlDataAdapter(sql, connection);
DataTable dt = new DataTable();
adp.Fill(dt);
if (dt.Rows.Count == 0)
return;
bool allocated = false;
foreach (DataRow dr in dt.Rows)
{
for (int i = 1; i <= numweeks + bonuses; i++)
{
if (i <= numweeks)
allocated = ProcessPanel(connection, hdrid, campaignid, dr, actualStart.AddDays(7 * (i - 1)), rate, numweeks, false, umguser);
else
allocated = ProcessPanel(connection, hdrid, campaignid, dr, actualStart.AddDays(7 * (i - 1)), rate, numweeks, true, umguser);
if(!allocated)
throw new Exception("ERROR: These panels have already been allocated. Please Check the panel allocations!");
}
}
ProcessBursts(connection, hdrid, dt, campaignid, product, umguser);
//throw new Exception("Buggin out Here");
LogAllocationErrors(connection);
trans.Complete();
}
}
private static void ProcessBursts(SqlConnection connection, int hdrid, DataTable dtPanels, int campaignid, string product, string umguser)
{
LoadBursts(connection, campaignid, product);
bool burstallocated = false;
bool bonusallocated = false;
int lastweek = 0;
foreach (DataRow dr in dtPanels.Rows)
{
foreach (Burst burst in _bursts)
{
using (TransactionScope trans = new TransactionScope(TransactionScopeOption.RequiresNew))
{
for (int i = 1; i <= burst.NumWeeks + burst.Bonuses; i++)
{
if (i <= burst.NumWeeks)
burstallocated = ProcessPanel(connection, hdrid, burst.CampaignID, dr, burst.StartDate.AddDays(7 * (i - 1)), burst.Rate, burst.NumWeeks, false, umguser);
else
bonusallocated = ProcessPanel(connection, hdrid, burst.CampaignID, dr, burst.StartDate.AddDays(7 * (i - 1)), burst.Rate, burst.NumWeeks, true, umguser);
if (!burstallocated)
{
lastweek = i;
break;
}
}
if (burstallocated)
trans.Complete();
else
LogAllocationError(Convert.ToInt32(dr["PanelID"]), burst.CampaignID, lastweek, burst.NumWeeks, burst.Bonuses);
}
}
}
}
[/code]
No such thing as nested transactions?
Related
Anyone know if this is a Dart bug or is it my misunderstanding of how Dart coding works?
I am learning Dart to investigate feasibility of eventually using Flutter; however, while exploring the language, I found a weird behavior (maybe a bug). I tried repro'ing it by writing a similar pattern of code, but have yet to figure out what causes it. In the attached code, I wrote a quicksort class. In that class, it counts the number of times the "sort" method is recursed and saves the count in a class member called "recurseCount".
From the main() class, if I use the QuickSort class directly, I have no issue getting back the recurseCount member; however, if I call it from a different class (called "Tester"), I do not get the correct value for "recurseCount". Why would calling a class from a separate class cause members to not provide the correct values?
import 'package:test/test.dart';
import 'dart:math' as _math;
// ***********************
enum SortOrder { ascending, descending, unsorted }
class QuickSort {
List list = [];
SortOrder sortOrder = SortOrder.unsorted;
int recurseCount = 0;
QuickSort({this.list}) {
if (list != null && list.length > 1) {
list = sort(useRandomPivot: true);
}
}
List sort(
{List iList,
int leftIndex = 0,
int rightIndex,
bool useRandomPivot = true}) {
if (iList != null) list = iList;
if (list.isEmpty) return [];
rightIndex ??= list.length - 1;
if (rightIndex > list.length - 1) rightIndex = list.length - 1;
if (leftIndex < rightIndex) {
recurseCount++;
var partitionIndex =
_partition(leftIndex, rightIndex, useRandomPivot: useRandomPivot);
if (partitionIndex == -1) {
//already sorted List
if (sortOrder == SortOrder.ascending) {
return list;
} else {
//SortOrder.descending
list = list.reversed.toList(); // Time Complexity of O(n)
sortOrder = SortOrder.ascending;
return list;
}
} else {
sort(leftIndex: leftIndex, rightIndex: partitionIndex - 1);
sort(leftIndex: partitionIndex + 1, rightIndex: rightIndex);
}
} else {
sortOrder = SortOrder.ascending;
}
return list;
}
int _partition(int leftIndex, int rightIndex, {bool useRandomPivot = true}) {
// in case the array is already sorted from the start; only run through the partition'ing one time
// note: regardless of ascending or descending order
if (leftIndex == 0 && rightIndex >= list.length - 1) {
sortOrder = checkSorting(list);
if (sortOrder != SortOrder.unsorted) {
return -1;
}
if (useRandomPivot) {
var random = _math.Random();
var randomIndex = random.nextInt(rightIndex - leftIndex);
_swapElements(randomIndex, rightIndex);
}
}
int pivotVal = list[rightIndex]; //select the last item as the pivot
var headIndex = leftIndex - 1;
for (var scanIndex = leftIndex; scanIndex < rightIndex; scanIndex++) {
if (list[scanIndex] <= pivotVal) {
headIndex++;
_swapElements(headIndex, scanIndex);
}
}
var partitionIndex = headIndex + 1;
_swapElements(partitionIndex, rightIndex);
return partitionIndex;
}
void _swapElements(position1, position2) {
int tempVal = list[position1];
list[position1] = list[position2];
list[position2] = tempVal;
}
SortOrder checkSorting(List arr) {
var isAsc = true;
var isDesc = true;
for (var i = 0; i < arr.length - 1; i++) {
if (arr[i] < arr[i + 1]) isDesc = false;
if (arr[i] > arr[i + 1]) isAsc = false;
if (!isDesc && !isAsc) break; // not sorted Asc or Desc
}
if (isAsc) {
return SortOrder.ascending;
} else if (isDesc) return SortOrder.descending;
return SortOrder.unsorted;
}
}
// ***********************TESTS*********************************
num log2(num n) => _math.log(n) / _math.ln2;
List getRandomIntList({int min = 0, int max = 10000, int len}) {
var random = _math.Random();
var tempList = List(len);
for (var i = 0; i < len; i++) {
tempList[i] = random.nextInt(max - min);
}
return tempList;
}
class Tester {
static num _runControlTest(List list) {
var stopwatch = Stopwatch();
stopwatch.start();
list.sort();
stopwatch.stop();
return stopwatch.elapsedMicroseconds;
}
static void runTests(List list, String groupName,
{bool useRandomPivot = false, bool sortFromConstructor = false}) {
// CONTROL
var controlElapsedTimeMicroSec = 0;
controlElapsedTimeMicroSec = _runControlTest(list);
// END CONTROL
var expectedRecursionCountLogN = log2(list.length).ceil();
var expectedRecursionCountNLogN = list.length * expectedRecursionCountLogN;
var qs = QuickSort();
var stopwatch = Stopwatch();
stopwatch.start();
list =
qs.sort(iList: list, useRandomPivot: useRandomPivot); // METHOD TO TEST
stopwatch.stop();
var elapsedTimeMicroSec = stopwatch.elapsedMicroseconds;
var recursionCount = qs
.recurseCount; //NOTE (BUG in Dart?): unable to get the recurseCount correctly from within this class/method
group(groupName, () {
var testSubject =
'Time Taken: ${controlElapsedTimeMicroSec} microseconds';
var reason =
'The built in sort took ${controlElapsedTimeMicroSec} microseconds, while the test took ${elapsedTimeMicroSec}.';
test(testSubject, () {
expect(
elapsedTimeMicroSec, lessThanOrEqualTo(controlElapsedTimeMicroSec),
reason: reason);
});
testSubject =
'Time Complexity: ${recursionCount} vs ${expectedRecursionCountNLogN}';
reason =
'Time Complexity of ${recursionCount} is greater than either range (LogN) ${expectedRecursionCountLogN} or (N*LogN) ${expectedRecursionCountNLogN}';
test(testSubject, () {
expect(recursionCount, lessThanOrEqualTo(expectedRecursionCountNLogN),
reason: reason);
});
});
}
}
void main() {
var min = 0;
var len = 1000000;
var max = len;
var originalList = getRandomIntList(min: min, max: max, len: len);
var list = List.from(originalList);
// BUG? When called within this Tester.runTests the sort method does NOT return the correct recurseCount
Tester.runTests(list, 'UNSORTED_RIGHT_PIVOT', useRandomPivot: false);
list = List.from(originalList);
var qs = QuickSort();
// When called directly from main() the sort method DOES return the correct recurseCount
var stopwatch = Stopwatch()..start();
qs.sort(iList: list, useRandomPivot: true); //METHOD TO TEST
stopwatch.stop();
group('UNSORTED_RANDOM_PIVOT', () {
test('Time Taken: ${stopwatch.elapsedMicroseconds} microseconds', () {
expect(stopwatch.elapsedMicroseconds,
lessThanOrEqualTo(Tester._runControlTest(originalList)));
});
var nLogN = (list.length * (log2(list.length).ceil()));
test('Time Complexity: ${qs.recurseCount} vs $nLogN', () {
expect(qs.recurseCount, lessThanOrEqualTo(nLogN));
});
});
}
My code below places sell pending orders when certain candle patterns are met on the H_1 chart. But duplicate pending orders are created when I change the chart timeframe and return to H_1. Also old orders that should have hit stop loss or take profit seem to still be open.
I need to have multiple pending orders, but the duplicates and orders that should have closed are not wanted. How can I solve this?
string prefix = "HG";
const int N_bars = 1;
int numBars = 1;
int numBarsArray[];
int tempVal = 0;
int NumOfDisplayBars = 300;
int count = 0;
extern double lotSize = 0.01;
int magicnumber = 1337;
void showRectangles()
{
for (int i=NumOfDisplayBars;i>=1;i--)
{
if(isBearishEngulfing(i))
{
drawBearRectangle(i + 1,iHigh(_Symbol,0,i + 1),iOpen(_Symbol,0,i + 1));
}
}
}
bool isBearishEngulfing(int current)
{
if( (iClose(_Symbol,0,current ) < iOpen( _Symbol,0,current ))
&& (iClose(_Symbol,0,current + 1) > iOpen( _Symbol,0,current + 1))
&& (iOpen( _Symbol,0,current ) > iClose(_Symbol,0,current + 1))
&& (iClose(_Symbol,0,current ) < iOpen( _Symbol,0,current + 1))
)
return true;
return false;
}
bool drawBearRectangle(int candleInt,const double top,const double bottom)
{
const datetime starts = iTime(_Symbol,0,candleInt);
const datetime ends = starts+PeriodSeconds()*N_bars;
const string name = prefix+"_"+(candleInt>0?"DEMAND":"SUPPLY")+"_"+TimeToString(starts);
if(!ObjectCreate(0,name,OBJ_RECTANGLE,0,0,0,0,0))
{
printf("%i %s: failed to create %s. error=%d",__LINE__,__FILE__,name,_LastError);
return false;
}
ObjectSetInteger(0,name,OBJPROP_TIME1, starts);
ObjectSetInteger(0,name,OBJPROP_TIME2, ends);
ObjectSetDouble( 0,name,OBJPROP_PRICE1,bottom);
ObjectSetDouble( 0,name,OBJPROP_PRICE2,top);
ObjectSetInteger(0,name,OBJPROP_COLOR, clrChocolate);
ObjectSetInteger(0,name,OBJPROP_STYLE, STYLE_DASHDOT);
ObjectSetInteger(0,name,OBJPROP_WIDTH, 1);
ObjectSetInteger(0,name,OBJPROP_FILL, false);
if(_Period == 60){
double entryPrice=bottom-3*_Point;
double stopLoss=top;
double slDist=fabs(entryPrice-stopLoss);
double dTakeProfit=entryPrice-2*slDist;
int ticketSell = OrderSend(Symbol(),OP_SELLLIMIT,lotSize, entryPrice,0,stopLoss,dTakeProfit,"SellOrder",magicnumber,0,Red);
}
return true;
}
void OnDeinit(const int reason){ObjectsDeleteAll(0,prefix);}
void OnTick()
{
if(!isNewBar())
return; // not necessary but waste of time to check every second
showRectangles();
}
bool isNewBar()
{
static datetime lastbar;
datetime curbar = (datetime)SeriesInfoInteger(_Symbol,_Period,SERIES_LASTBAR_DATE);
if(lastbar != curbar)
{
lastbar = curbar;
return true;
}
return false;
}
Q : How can I solve the duplicates of pending order issues?... when I change the chart timeframe and return to H_1.
Well, this is rather a feature of the MQL4/5 code-execution ecosystem.
Solution:
Configure a preventive checkmark, setup in MT4-Terminal in Tools > Options > Expert Advisor-tab so as to become:
[x] Disable automated trading when the chart symbol or period has been changed
I am developing a module in a billing system for a national Utility. The module is supposed to pick all successfully billed customers and print their bills.Bills are written as text files and saved on a local folder and the program has to pick them up and print them one by one.I'm using a DFX-9000 printer and pre-formatted roll paper,however,each time a new bill comes in,the printer skips some space before it prints it which distorts the 2nd and following bills.
I tried putting all the bills in a single text file which prints well when opened in notepad but not in my code.
Here is part of my code
Font printFont = new Font("Lucida Console", 10);
//static string filename;
StreamReader reader = new StreamReader(Filename);
public void Print()
{
try
{
PrintDocument pd = new PrintDocument();
pd.DefaultPageSettings.PaperSize = new System.Drawing.Printing.PaperSize("myPaper", 826, 1169);
pd.DefaultPageSettings.Margins = new Margins(0, 0, 0, 0);
//pd.DefaultPageSettings.PrinterSettings.IsPlotter = true;
pd.DefaultPageSettings.PrinterResolution.Kind = PrinterResolutionKind.Custom;
pd.PrintPage += new PrintPageEventHandler(this.PrintTextFileHandler);
pd.Print();
if (reader != null)
reader.Close();
Console.WriteLine("Printout Complete");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
private void PrintTextFileHandler(object sender, PrintPageEventArgs pe)
{
StringFormat sf = new StringFormat();
Graphics g = pe.Graphics;
float linesPerPage = 0;
float yPos = 0;
int count = 0;
float leftMargin = 40;//pe.MarginBounds.Left;
float topMargin = pe.MarginBounds.Top;
string line = null;
linesPerPage = 500;// pe.MarginBounds.Height / printFont.GetHeight(g);
while (count <= linesPerPage &&((line = reader.ReadLine()) != null))
{
yPos = topMargin + (count * printFont.GetHeight(g));
g.DrawString(line, printFont, Brushes.Black, leftMargin, yPos);
count++;
}
if (line != null)
{
pe.HasMorePages = true;
}
else
{
pe.HasMorePages = false;
}
Could your printing.papersize be wrong? I notice it's 1169, doesn't standard paper stop at 1100?
I am developing an audio strreaming application and i am using Streamingplayer
now i want information about the currently playing song how can i obtain that?
It is not available as part of the url as it is shown in streamplayer api.
Does anybody has made such thing ealiar then please reply.
How can i update that when a song changes?
You can refer the link: http://www.smackfu.com/stuff/programming/shoutcast.html
and can use below code
void getMetaData(){
Thread metaDataThread = new Thread(new Runnable(){
public void run(){
try {
metaDataCheckBit = false;
StreamConnection streamConnection=null;
HttpConnection httpConnection = null;
InputStream inputStream =null;
streamConnection=(StreamConnection)Connector.open(newUrl);
httpConnection=(HttpConnection)streamConnection;
httpConnection.setRequestProperty("Icy-metadata", "1");
int httpStatus=httpConnection.getResponseCode();
if(httpStatus==HttpConnection.HTTP_OK){
String mint = httpConnection.getHeaderField("icy-metaint");
inputStream = streamConnection.openInputStream();
int length= Integer.parseInt(mint);
int b = 0;
int count =0;
while(count++ < length){
b = inputStream.read();
}
int metalength = ((int)b)*16;
if(metalength <= 0)return;
byte buf[] = new byte[metalength];
inputStream.read(buf,0,buf.length);
String metaData = new String(buf);
int streamTilleIndex = metaData.indexOf("StreamTitle");
// if(streamTilleIndex <= 0)return;
String streamTille = metaData.substring(streamTilleIndex);
int eqindex = streamTille.indexOf('=');
// if(eqindex <= 0){return;}
int colindex = streamTille.indexOf(';');
// if(colindex <= 0)return;
String metaDatam = streamTille.substring(eqindex, colindex);
int lengthOfMaetaDataM = metaDatam.length();
// if(lengthOfMaetaDataM <= 0){return;}
metaDataParsed =metaDatam.substring(2, lengthOfMaetaDataM-2);
if(metaDataParsed!="")
metaDataCheckBit = true;
}
}
catch (Exception e){
System.out.println(e);
}
}
});
metaDataThread.start();
}
How can we populate a Listfield in blackberry with results from a Autocomplete field using Blackberry API(JDE 5)
This is the code to get Contacts, returns a vector containing string array..
contact[0] is name, contact[1] is email and contact[2] is contact number..
read elements from vector and set autocompleteField:Example: http://docs.blackberry.com/en/developers/deliverables/18125/Autocomplete_text_field_1200231_11.jsp
private Vector getContacts() {
Vector result = new Vector();
try {
BlackBerryContactList contactList = (BlackBerryContactList) PIM.getInstance().openPIMList(PIM.CONTACT_LIST, PIM.READ_ONLY);
Enumeration enumx = contactList.items();
while (enumx.hasMoreElements()) {
BlackBerryContact c = (BlackBerryContact) enumx.nextElement();
String[] contact = new String[3];
if (contactList.isSupportedField(BlackBerryContact.NAME)) {
String[] name = c.getStringArray(BlackBerryContact.NAME, 0);
String firstName = name[Contact.NAME_GIVEN];
String lastName = name[Contact.NAME_FAMILY];
System.out.println("this is contact..........." + firstName);
contact[0] = firstName + " " + lastName;
}
if (contactList.isSupportedField(BlackBerryContact.EMAIL)) {
StringBuffer emails = new StringBuffer();
int emailCount = c.countValues(BlackBerryContact.EMAIL);
for (int i = 0; i < emailCount; i++) {
String email = c.getString(BlackBerryContact.EMAIL, i);
if (email != null) {
emails.append(email.trim());
emails.append("; ");
}
}
contact[1] = emails.toString();
}
if ((contactList.isSupportedField(BlackBerryContact.TEL)) && (c.countValues(BlackBerryContact.TEL) > 0)) {
int numValues = 0;
try {
numValues = c.countValues(BlackBerryContact.TEL);
} catch (Exception localException) {
}
String mobileNumber = "";
String homeNumber = "";
String workNumber = "";
for (int i = 0; i < numValues; ++i) {
if (c.getAttributes(BlackBerryContact.TEL, i) == BlackBerryContact.ATTR_WORK)
workNumber = c.getString(BlackBerryContact.TEL, i);
else if (c.getAttributes(BlackBerryContact.TEL, i) == BlackBerryContact.ATTR_HOME)
homeNumber = c.getString(BlackBerryContact.TEL, i);
else if (c.getAttributes(BlackBerryContact.TEL, i) == BlackBerryContact.ATTR_MOBILE)
mobileNumber = c.getString(BlackBerryContact.TEL, i);
}
if (!mobileNumber.equalsIgnoreCase(""))
contact[2] = mobileNumber.toString();
else if (!homeNumber.equalsIgnoreCase(""))
contact[2] = homeNumber.toString();
else if (!workNumber.equalsIgnoreCase(""))
contact[2] = workNumber.toString();
}
result.addElement(contact);
}
} catch (PIMException ex) {
ex.printStackTrace();
}
return result;
}
There's a sample app provided with the developer tools that demonstrates the use of this field. From your developer tools directory go to samples/com/rim/samples/device/ui/autocompletefielddemo and you'll see the AutoCompleteFieldDemo.java app.