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• How can I define an irregular area of the screen and find the closest point to the mouse in that area?

  - by JonathonG

  I'm looking for a method to define an area of the screen that the mouse cannot leave. I have been directed by rob mayoff, the answerer of this question, that I can use a Quartz Event Tap to detect mouse events. This puts me part of the way to the solution to THIS question. I need to define an irregular area of the screen, not just a rectangle, that the mouse cannot leave. I have been researching this and the only idea I can come up with is using a bitmap to define the irregular area, as it will be very oddly shaped. However, I am open to solutions other than using a bitmap. Since this must be done on a Mac, I've determined that I will have to use objective C / Cocoa . I need to know how to define the area and, equally importantly, how to find the closest point in the area to the mouse (so that I can move the mouse to it if the mouse tries to move outside of the area). This is similar to what the restricted area will look like: [edit:] Okay, I've come up with part of the answer to this. If I can do a basic (light-weight) point collision detection on the image mask, I can use a simple algorithm to detect the closest point to the mouse on the black area of the image. I could do this by calculating distance between a pre-defined point (P) inside the black area of the image and the target mouse position (T), taking the midpoint (M), then checking if the midpoint is inside or outside of the shape (black or white, respectively). If M is inside the shape, then move the P to M, otherwise move T to the M, continuously recalculate this until the distance between T and P is 1 pixel or less, then move the mouse to the final calculated position. All of that being said, I still need some way to test the position of the mouse against that same position on the bitmap (assume the bitmap is the same resolution as the monitor), and check if that point is black or white. All of this needs to be done in the background, without this application actually having focus, or the bitmap being visible... is this possible?

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• Custom Font. Keeping the font width same.

  - by user338322

  I am trying to draw a string using quartz 2d. What i am doing is, i am drawing each letter of the string individually, because each letter has special attributes associated with it, by taking each letter into a new string. The string gets printed, but the space between the letters is not uniform. It looks very ugly to read . I read someting about using custom fonts. But i have no Idea, if I can do it!! my code is here. (void) drawRect : (CGRect)rect{ NSString *string=@"My Name Is Adam"; float j=0; const char *charStr=[string cStringUsingEncoding: NSASCIIStringEncoding]; for(int i=0;i { NSString *str=[NSString stringWithFormat:@"%c",charStr[i]]; const char *s=[str cStringUsingEncoding:NSASCIIStringEncoding]; NSLog(@"%s",s); CGContextRef context=[self getMeContextRef]; CGContextSetTextMatrix (context,CGAffineTransformMakeScale(1.0, -1.0)) ; CGContextSelectFont(context, "Arial", 24, kCGEncodingMacRoman); //CGContextSetCharacterSpacing (context, 10); CGContextSetRGBFillColor (context, 0,0,200, 1); CGContextSetTextDrawingMode(context,kCGTextFill); CGContextShowTextAtPoint(context, 80+j,80,s,1); j=j+15; } } In the output 'My Name is Adam' gets printed but the space between the letters is not uniform.!! is there any way to make the space uniform!!!

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• Graph not following orientation

  - by user1214037

  so I am trying to draw some grid lines that in landscape go all the way down to the bottom, however when I switch to landscape the the graph doesn't follow and the grid lines go smaller. I have set the - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return YES; } However it still doesn't work, here is my code. Can anyone spot the problem? this is the custom view file, the view controller is the default apart from the code above that returns yes. .h file #import <UIKit/UIKit.h> #define kGraphHeight 300 #define kDefaultGraphWidth 900 #define kOffsetX 10 #define kStepX 50 #define kGraphBottom 300 #define kGraphTop 0 @interface GraphView : UIView @end And here is the implementation - (void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetLineWidth(context, 0.6); CGContextSetStrokeColorWithColor(context, [[UIColor lightGrayColor] CGColor]); // How many lines? int howMany = (kDefaultGraphWidth - kOffsetX) / kStepX; // Here the lines go for (int i = 0; i < howMany; i++) { CGContextMoveToPoint(context, kOffsetX + i * kStepX, kGraphTop); CGContextAddLineToPoint(context, kOffsetX + i * kStepX, kGraphBottom); } CGContextStrokePath(context); } Any help would be appreciated btw I am following this tutorial http://buildmobile.com/creating-a-graph-with-quartz-2d/#fbid=YDPLqDHZ_9X

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• ORA-03113 in code. In addition, TNS-12535 and ORA-03137 in alert file

  - by user1348107

  I've got an exception that contain ORA-03113: (SiPPSS.GetPrintWorkDirectDetail) - ERR:ORA-03113: end-of-file on communication channel Process ID: 7448 Session ID: 30 Serial number: 9802 ?????:12110937 ????:T855 Oracle.DataAccess.Client.OracleException ORA-03113: end-of-file on communication channel Process ID: 7448 Session ID: 30 Serial number: 9802 ?? Oracle.DataAccess.Client.OracleException.HandleErrorHelper(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, String procedure, Boolean bCheck) ?? Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, String procedure, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, Boolean bCheck) ?? Oracle.DataAccess.Client.OracleCommand.ExecuteReader(Boolean requery, Boolean fillRequest, CommandBehavior behavior) ?? Oracle.DataAccess.Client.OracleDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior) ?? System.Data.Common.DbDataAdapter.Fill(DataTable dataTable) ?? SiPPSS.VSireiMeisaiDsTableAdapters.V_SIREI_MEISAITableAdapter.FillByRunningNoAndProcNo(V_SIREI_MEISAIDataTable dataTable, String RUNNING_NO, String PROC_NO) ?? C:\SVM\trunk\SiPPSSServer\Server\Dao\View\VSireiMeisaiDs.Designer.vb:? 386 ?? SiPPSS.GetPrintWorkDirectDetail.Execute(BLogicParam param) ?? C:\SVM\trunk\SiPPSSServer\Server\BLogic\Screen\Printing\Rprt0701\GetPrintWorkDirectDetail.vb:? 105 In this case, the oracle alert log as beblow: Fatal NI connect error 12170. VERSION INFORMATION: TNS for 64-bit Windows: Version 11.2.0.1.0 - Production Oracle Bequeath NT Protocol Adapter for 64-bit Windows: Version 11.2.0.1.0 - Production Windows NT TCP/IP NT Protocol Adapter for 64-bit Windows: Version 11.2.0.1.0 - Production Time: 01-11?-2012 13:50:45 Tracing not turned on. Tns error struct: ns main err code: 12535 TNS-12535: TNS: ??????·???????? ns secondary err code: 12560 nt main err code: 505 TNS-00505: ??????????? nt secondary err code: 60 nt OS err code: 0 Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=10.41.102.53)(PORT=1794)) Thu Nov 01 13:54:17 2012 Thread 1 cannot allocate new log, sequence 1880 Private strand flush not complete Current log# 1 seq# 1879 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thread 1 advanced to log sequence 1880 (LGWR switch) Current log# 2 seq# 1880 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thu Nov 01 13:54:21 2012 Archived Log entry 1118 added for thread 1 sequence 1879 ID 0xe48db805 dest 1: Thu Nov 01 14:40:12 2012 Thread 1 cannot allocate new log, sequence 1881 Private strand flush not complete Current log# 2 seq# 1880 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thread 1 advanced to log sequence 1881 (LGWR switch) Current log# 3 seq# 1881 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Thu Nov 01 14:40:16 2012 Archived Log entry 1119 added for thread 1 sequence 1880 ID 0xe48db805 dest 1: Thu Nov 01 15:27:42 2012 Thread 1 cannot allocate new log, sequence 1882 Private strand flush not complete Current log# 3 seq# 1881 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Thread 1 advanced to log sequence 1882 (LGWR switch) Current log# 1 seq# 1882 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thu Nov 01 15:27:46 2012 Archived Log entry 1120 added for thread 1 sequence 1881 ID 0xe48db805 dest 1: Thu Nov 01 16:23:48 2012 Thread 1 cannot allocate new log, sequence 1883 Private strand flush not complete Current log# 1 seq# 1882 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thread 1 advanced to log sequence 1883 (LGWR switch) Current log# 2 seq# 1883 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thu Nov 01 16:23:52 2012 Archived Log entry 1121 added for thread 1 sequence 1882 ID 0xe48db805 dest 1: Thu Nov 01 17:05:50 2012 Thread 1 cannot allocate new log, sequence 1884 Private strand flush not complete Current log# 2 seq# 1883 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thread 1 advanced to log sequence 1884 (LGWR switch) Current log# 3 seq# 1884 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Thu Nov 01 17:05:55 2012 Archived Log entry 1122 added for thread 1 sequence 1883 ID 0xe48db805 dest 1: Thu Nov 01 17:26:52 2012 Fatal NI connect error 12170. VERSION INFORMATION: TNS for 64-bit Windows: Version 11.2.0.1.0 - Production Oracle Bequeath NT Protocol Adapter for 64-bit Windows: Version 11.2.0.1.0 - Production Windows NT TCP/IP NT Protocol Adapter for 64-bit Windows: Version 11.2.0.1.0 - Production Time: 01-11?-2012 17:26:52 Tracing not turned on. Tns error struct: ns main err code: 12535 TNS-12535: TNS: ??????·???????? ns secondary err code: 12560 nt main err code: 505 TNS-00505: ??????????? nt secondary err code: 60 nt OS err code: 0 Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=10.41.102.62)(PORT=1286)) Thu Nov 01 17:27:16 2012 Fatal NI connect error 12170. VERSION INFORMATION: TNS for 64-bit Windows: Version 11.2.0.1.0 - Production Oracle Bequeath NT Protocol Adapter for 64-bit Windows: Version 11.2.0.1.0 - Production Windows NT TCP/IP NT Protocol Adapter for 64-bit Windows: Version 11.2.0.1.0 - Production Time: 01-11?-2012 17:27:16 Tracing not turned on. Tns error struct: ns main err code: 12535 TNS-12535: TNS: ??????·???????? ns secondary err code: 12560 nt main err code: 505 TNS-00505: ??????????? nt secondary err code: 60 nt OS err code: 0 Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=10.41.102.62)(PORT=1285)) Thu Nov 01 18:08:39 2012 Thread 1 advanced to log sequence 1885 (LGWR switch) Current log# 1 seq# 1885 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thu Nov 01 18:08:40 2012 Archived Log entry 1123 added for thread 1 sequence 1884 ID 0xe48db805 dest 1: Thu Nov 01 19:33:21 2012 Thread 1 cannot allocate new log, sequence 1886 Private strand flush not complete Current log# 1 seq# 1885 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thread 1 advanced to log sequence 1886 (LGWR switch) Current log# 2 seq# 1886 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thu Nov 01 19:33:25 2012 Archived Log entry 1124 added for thread 1 sequence 1885 ID 0xe48db805 dest 1: Thu Nov 01 20:32:25 2012 Thread 1 cannot allocate new log, sequence 1887 Private strand flush not complete Current log# 2 seq# 1886 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thread 1 advanced to log sequence 1887 (LGWR switch) Current log# 3 seq# 1887 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Thu Nov 01 20:32:29 2012 Archived Log entry 1125 added for thread 1 sequence 1886 ID 0xe48db805 dest 1: Thu Nov 01 21:13:07 2012 Thread 1 advanced to log sequence 1888 (LGWR switch) Current log# 1 seq# 1888 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thu Nov 01 21:13:08 2012 Archived Log entry 1126 added for thread 1 sequence 1887 ID 0xe48db805 dest 1: Thu Nov 01 22:00:00 2012 Setting Resource Manager plan SCHEDULER[0x3006]:DEFAULT_MAINTENANCE_PLAN via scheduler window Setting Resource Manager plan DEFAULT_MAINTENANCE_PLAN via parameter Thu Nov 01 22:00:00 2012 Starting background process VKRM Thu Nov 01 22:00:00 2012 VKRM started with pid=32, OS id=4048 Thu Nov 01 22:00:59 2012 Thread 1 cannot allocate new log, sequence 1889 Private strand flush not complete Current log# 1 seq# 1888 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thread 1 advanced to log sequence 1889 (LGWR switch) Current log# 2 seq# 1889 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thu Nov 01 22:01:03 2012 Archived Log entry 1127 added for thread 1 sequence 1888 ID 0xe48db805 dest 1: Thu Nov 01 22:32:36 2012 Thread 1 advanced to log sequence 1890 (LGWR switch) Current log# 3 seq# 1890 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Thu Nov 01 22:32:37 2012 Archived Log entry 1128 added for thread 1 sequence 1889 ID 0xe48db805 dest 1: Thu Nov 01 22:33:18 2012 Errors in file d:\oracle\diag\rdbms\siporex\siporex\trace\siporex_ora_11884.trc (incident=101313): ORA-03137: TTC protocol internal error : [12333] [8] [49] [50] [] [] [] [] Incident details in: d:\oracle\diag\rdbms\siporex\siporex\incident\incdir_101313\siporex_ora_11884_i101313.trc Thu Nov 01 22:33:21 2012 Trace dumping is performing id=[cdmp_20121101223321] Thu Nov 01 22:40:43 2012 Thread 1 cannot allocate new log, sequence 1891 Private strand flush not complete Current log# 3 seq# 1890 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Thread 1 advanced to log sequence 1891 (LGWR switch) Current log# 1 seq# 1891 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thu Nov 01 22:40:47 2012 Archived Log entry 1129 added for thread 1 sequence 1890 ID 0xe48db805 dest 1: Thu Nov 01 23:47:30 2012 Thread 1 cannot allocate new log, sequence 1892 Private strand flush not complete Current log# 1 seq# 1891 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thread 1 advanced to log sequence 1892 (LGWR switch) Current log# 2 seq# 1892 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thu Nov 01 23:47:34 2012 Archived Log entry 1130 added for thread 1 sequence 1891 ID 0xe48db805 dest 1: Fri Nov 02 00:49:31 2012 Thread 1 cannot allocate new log, sequence 1893 Private strand flush not complete Current log# 2 seq# 1892 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thread 1 advanced to log sequence 1893 (LGWR switch) Current log# 3 seq# 1893 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Fri Nov 02 00:49:35 2012 Archived Log entry 1131 added for thread 1 sequence 1892 ID 0xe48db805 dest 1: Fri Nov 02 01:43:12 2012 Thread 1 cannot allocate new log, sequence 1894 Private strand flush not complete Current log# 3 seq# 1893 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Thread 1 advanced to log sequence 1894 (LGWR switch) Current log# 1 seq# 1894 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Fri Nov 02 01:43:17 2012 Archived Log entry 1132 added for thread 1 sequence 1893 ID 0xe48db805 dest 1: Fri Nov 02 01:52:51 2012 Errors in file d:\oracle\diag\rdbms\siporex\siporex\trace\siporex_ora_6124.trc (incident=101273): ORA-03137: TTC protocol internal error : [12333] [4] [80] [82] [] [] [] [] Incident details in: d:\oracle\diag\rdbms\siporex\siporex\incident\incdir_101273\siporex_ora_6124_i101273.trc Fri Nov 02 01:52:54 2012 Trace dumping is performing id=[cdmp_20121102015254] Fri Nov 02 02:00:00 2012 Clearing Resource Manager plan via parameter Fri Nov 02 02:43:37 2012 Thread 1 cannot allocate new log, sequence 1895 Private strand flush not complete Current log# 1 seq# 1894 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thread 1 advanced to log sequence 1895 (LGWR switch) Current log# 2 seq# 1895 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Fri Nov 02 02:43:41 2012 Archived Log entry 1133 added for thread 1 sequence 1894 ID 0xe48db805 dest 1: Fri Nov 02 04:46:18 2012 Thread 1 cannot allocate new log, sequence 1896 Private strand flush not complete Current log# 2 seq# 1895 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thread 1 advanced to log sequence 1896 (LGWR switch) Current log# 3 seq# 1896 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Fri Nov 02 04:46:22 2012 Archived Log entry 1134 added for thread 1 sequence 1895 ID 0xe48db805 dest 1: Fri Nov 02 04:51:41 2012 Errors in file d:\oracle\diag\rdbms\siporex\siporex\trace\siporex_ora_4048.trc (incident=101425): ORA-03137: TTC protocol internal error : [12333] [4] [67] [85] [] [] [] [] Incident details in: d:\oracle\diag\rdbms\siporex\siporex\incident\incdir_101425\siporex_ora_4048_i101425.trc Fri Nov 02 04:51:44 2012 Trace dumping is performing id=[cdmp_20121102045144] Fri Nov 02 05:54:44 2012 Thread 1 cannot allocate new log, sequence 1897 Private strand flush not complete Current log# 3 seq# 1896 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Thread 1 advanced to log sequence 1897 (LGWR switch) Current log# 1 seq# 1897 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Fri Nov 02 05:54:48 2012 Archived Log entry 1135 added for thread 1 sequence 1896 ID 0xe48db805 dest 1: Fri Nov 02 07:00:34 2012 Thread 1 cannot allocate new log, sequence 1898 Private strand flush not complete Current log# 1 seq# 1897 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thread 1 advanced to log sequence 1898 (LGWR switch) Current log# 2 seq# 1898 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Fri Nov 02 07:00:38 2012 Archived Log entry 1136 added for thread 1 sequence 1897 ID 0xe48db805 dest 1: Fri Nov 02 08:32:41 2012 Thread 1 cannot allocate new log, sequence 1899 Private strand flush not complete Current log# 2 seq# 1898 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thread 1 advanced to log sequence 1899 (LGWR switch) Current log# 3 seq# 1899 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Fri Nov 02 08:32:45 2012 Archived Log entry 1137 added for thread 1 sequence 1898 ID 0xe48db805 dest 1: Fri Nov 02 09:48:57 2012 Thread 1 advanced to log sequence 1900 (LGWR switch) Current log# 1 seq# 1900 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Fri Nov 02 09:48:58 2012 Archived Log entry 1138 added for thread 1 sequence 1899 ID 0xe48db805 dest 1: Fri Nov 02 10:18:15 2012 Thread 1 cannot allocate new log, sequence 1901 Private strand flush not complete Current log# 1 seq# 1900 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thread 1 advanced to log sequence 1901 (LGWR switch) Current log# 2 seq# 1901 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Fri Nov 02 10:18:19 2012 Archived Log entry 1139 added for thread 1 sequence 1900 ID 0xe48db805 dest 1: Fri Nov 02 10:22:58 2012 Thread 1 cannot allocate new log, sequence 1902 Private strand flush not complete Current log# 2 seq# 1901 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Thread 1 advanced to log sequence 1902 (LGWR switch) Current log# 3 seq# 1902 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Fri Nov 02 10:23:02 2012 Archived Log entry 1140 added for thread 1 sequence 1901 ID 0xe48db805 dest 1: Fri Nov 02 10:27:38 2012 Thread 1 cannot allocate new log, sequence 1903 Checkpoint not complete Current log# 3 seq# 1902 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Thread 1 cannot allocate new log, sequence 1903 Private strand flush not complete Current log# 3 seq# 1902 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO03.LOG Thread 1 advanced to log sequence 1903 (LGWR switch) Current log# 1 seq# 1903 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Fri Nov 02 10:27:45 2012 Archived Log entry 1141 added for thread 1 sequence 1902 ID 0xe48db805 dest 1: Fri Nov 02 10:32:27 2012 Thread 1 cannot allocate new log, sequence 1904 Checkpoint not complete Current log# 1 seq# 1903 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thread 1 cannot allocate new log, sequence 1904 Private strand flush not complete Current log# 1 seq# 1903 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO01.LOG Thread 1 advanced to log sequence 1904 (LGWR switch) Current log# 2 seq# 1904 mem# 0: D:\ORACLE\ORADATA\SIPOREX\REDO02.LOG Fri Nov 02 10:32:34 2012 Archived Log entry 1142 added for thread 1 sequence 1903 ID 0xe48db805 dest 1: Fri Nov 02 10:35:42 2012 Errors in file d:\oracle\diag\rdbms\siporex\siporex\trace\siporex_ora_15856.trc (incident=101353): ORA-03137: TTC protocol internal error : [12333] [8] [49] [50] [] [] [] [] Incident details in: d:\oracle\diag\rdbms\siporex\siporex\incident\incdir_101353\siporex_ora_15856_i101353.trc Fri Nov 02 10:35:44 2012 Trace dumping is performing id=[cdmp_20121102103544] I don't know main reason of this issue as well as how to fixing it. Please help me.

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• Can AutoIt scripts run as a scheduled task while not logged in?

  - by muddywater

  I am using Ruby/WATIR/AutoIt to automate a task via Task Scheduler which runs fine as long as I am logged in, but as soon as my account is locked (mandated 10 minute screen lock) or I logout the script stops functioning. When I log back in, it is sitting at the part where AutoIt is supposed to handle a file download dialogue by clicking save and then entering the filename and clicking to save again. The follwing is the code that works while I am logged in. Is AutoIt supposed to work when I am not logged in, and is there some other way to accomplish this? Thanks!! because search has not turned up anything (terms are too generic) prompt_message = "Do you want to save this file, or find a program online to open it?" window_title = "File Download" save_dialog = WIN32OLE.new("AutoItX3.Control") sleep 1 save_dialog_obtained = save_dialog.WinWaitActive(window_title,prompt_message, 25) save_dialog.ControlFocus(window_title, prompt_message, "&Save") sleep 1 save_dialog.Send("S") save_dialog.ControlClick(window_title, prompt_message, "&Save") save_dialog.WinSetTitle(window_title, prompt_message, "This is ForTesting" ) saveas_dialog_obtained = save_dialog.WinWait("Save As", "Save&in", 5) sleep 1 path = fileName puts " Edit the file path" save_dialog.ControlSend("Save As", "", "Edit1",path) sleep 4 puts " Save the file" save_dialog.ControlClick("Save As", "Save &in", "&Save") save_fileAlreadyExists = save_dialog.Send("Y")

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• FreeRTOS Sleep Mode hazards while using MSP430f5438

  - by michael

  Hi, I wrote an an idle hook shown here void vApplicationIdleHook( void ) { asm("nop"); P1OUT &= ~0x01;//go to sleep lights off! LPM3;// LPM Mode - remove to make debug a little easier... asm("nop"); } That should cause the LED to turn off, and MSP430 to go to sleep when there is nothing to do. I turn the LED on during some tasks. I also made sure to modify the sleep mode bit in the SR upon exit of any interrupt that could possibly wake the MCU (with the exception of the scheduler tick isr in portext.s43. The macro in iar is __bic_SR_register_on_exit(LPM3_bits); // Exit Interrupt as active CPU However, it seems as though putting the MCU to sleep causes some irregular behavior. The led stays on always, although when i scope it, it will turn off for a couple instructions cycles when ever i wake the mcu via one of the interrupts (UART), and then turn back on. If I comment out the LPM3 instruction, things go as planned. The led stays off for most of the time and only comes on when a task is running. I am using a MSP4f305438 Any ideas?

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• Cooperative/Non-preemptive threading avoiding threadlooks?

  - by Wayne

  Any creative ideas to avoid deadlocks on a yield or sleep with cooperative/non-preemptive multitasking without doing an O/S Thread.Sleep(10)? Typically the yield or sleep call will call back into the scheduler to run other tasks. But this can sometime produce deadlocks. Some background: This application has enormous need for speed and, so far, it's extremely fast as compared to other systems in the same industry. One of the speed techniques is cooperative/non-preemptive threading rather then the cost of a context switch from O/S threads. The high level design a priority manager which calls out to tasks depending on priority and processing time. Each task does one "iteration" of work and returns to wait its turn again in the priority queue. The tricky thing with non-preemptive threading is what to do when you want to a particular task to stop in the middle of work and wait for some other event from a different task before continuing. In this case, we have 3 tasks, A B and C where A is a controller that must synchronize the activity of B and C. First, A starts both B and C. Then B yields so C gets invoked. When C yields, A sees they are both inactive, decides it's time for B to run but not time for C yet. Well B is now stuck in a yield that has called C, so it can never run. Sincerely, Wayne

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• How to solve concurrency problems in ASP.NET Windows-Workflow and ActiveRecord/NHibernate?

  - by Famous Nerd

  I have found that ActiveRecord uses the Session-Scope object within the ASP.NET application and that if the web-site is read-write we can have a tug-o-war between the Workflow's own Data-Access SessionScope and that of the ASP.NET site. I would really like to have the WindowsWorkflow Runtime use the same object session as the web-site however, they have different lifetimes. Sometimes, a web-request may save a very simple piece of data which would execute quickly however, if the web-site kicks off a workflow process.. how can that workflow make data-modifications while still allowing the Appliaction_EndRequest to dispose the ASP.NET SessionScope ... it's like ownership of the SessionScope should be shared between the workflow runtime and the ASP.NET website. Manual Workflow Scheduler may be the Savior... if a workflow is synchronous and merely uses CallExternalMethod to interact with the Host then we could constrain all the data-access to the host.. then the sessionScope can exist once. This however, won't solve the problem of a delay activity... if this delay fires, we could need to update data... in this case we'd need an isolated Session Scope and concurrency may arise. This however, differs from SharePoint workflows where it seems that the SharePoint workflow can save data from the web and the workflow and that concurrency is handled through other means. Can anyone offer any suggestions on how to allow the workflow to manage data and play nice with ASP.NET web sites?

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• Log4Net GetLogger creates rolling files even for the unreferenced files

  - by ybastiand

  Hi, I have a C# solution that contains three executables. I have each of these three executables sharing the same log4net configuration file. At startup of each of the executable, they retrieve a logger (one logger per executable, as per configuration file further below). When one of the executable performs Log.GetLogger(), it creates all the rolling files instead of only the one rolling file that is referred to as appender-ref in the executable's logger configuration. For instance, when I startup my sending daemon executable, it performs Log.GetLogger("SendingDaemonLogger") which creates 3 files Log/RuleScheduler.txt, Log/NotificationGenerator.txt and Log/NotificationSender.txt instead of only the desired Log/NotificationSender.txt. Then when I startup another of the executables, for instance the rule scheduler daemon, this other process cannot write in Log/RuleScheduler.txt because it has been created and locked by the sending daemon process. I am guessing that there may be three different solutions to my problem: The GetLogger should only create the rolling file appenders that are referenced in the config I should have one config file per executable, this way each config file could list only one rolling file appender and starting each of the executable would not create the rolling files of the other daemons. I am however reluctant to do this because some of the configuration (SMTP appender, console appender) is shared between the daemons and I don't want to have duplicate copies to maintain. Unless there is a way to have a config file including another one? Maybe there is a way to configure the rolling file so that concurrent access across processes is allowed? This solution still isn't perfect in my opinion because any of the daemons should not be creating the rolling files of some other daemons. Thanks in advance for your help! I have difficulties for posting the config file properly here (this website interprets as HTML). Please go to the following link for seeing my log4net configuration file: log4Net configuration file

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• How to compile ocaml to native code

  - by Indra Ginanjar

  i'm really interested learning ocaml, it fast (they said it could be compiled to native code) and it's functional. So i tried to code something easy like enabling mysql event scheduler. #load "unix.cma";; #directory "+mysql";; #load "mysql.cma";; let db = Mysql.quick_connect ~user:"username" ~password:"userpassword" ~database:"databasename"();; let sql = Printf.sprintf "SET GLOBAL EVENT_SCHEDULER=1;" in (Mysql.exec db sql);; It work fine on ocaml interpreter, but when i was trying to compile it to native (i'm using ubuntu karmic), neither of these command worked ocamlopt -o mysqleventon mysqleventon.ml unix.cmxa mysql.cmxa ocamlopt -o mysqleventon mysqleventon.ml unix.cma mysql.cma i also tried ocamlc -c mysqleventon.ml unix.cma mysql.cma all of them resulting same message File "mysqleventon.ml", line 1, characters 0-1: Error: Syntax error Then i tried to remove the "# load", so the code goes like this let db = Mysql.quick_connect ~user:"username" ~password:"userpassword" ~database:"databasename"();; let sql = Printf.sprintf "SET GLOBAL EVENT_SCHEDULER=1;" in (Mysql.exec db sql);; The ocamlopt resulting message File "mysqleventon.ml", line 1, characters 9-28: Error: Unbound value Mysql.quick_connect I hope someone could tell me, where did i'm doing wrong.

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• java: can't use constructors in abstract class

  - by ufk

  Hi. I created the following abstract class for job scheduler in red5: package com.demogames.jobs; import com.demogames.demofacebook.MysqlDb; import org.red5.server.api.IClient; import org.red5.server.api.IConnection; import org.red5.server.api.IScope; import org.red5.server.api.scheduling.IScheduledJob; import org.red5.server.api.so.ISharedObject; import org.apache.log4j.Logger; import org.red5.server.api.Red5; /** * * @author ufk */ abstract public class DemoJob implements IScheduledJob { protected IConnection conn; protected IClient client; protected ISharedObject so; protected IScope scope; protected MysqlDb mysqldb; protected static org.apache.log4j.Logger log = Logger .getLogger(DemoJob.class); protected DemoJob (ISharedObject so, MysqlDb mysqldb){ this.conn=Red5.getConnectionLocal(); this.client = conn.getClient(); this.so=so; this.mysqldb=mysqldb; this.scope=conn.getScope(); } protected DemoJob(ISharedObject so) { this.conn=Red5.getConnectionLocal(); this.client=this.conn.getClient(); this.so=so; this.scope=conn.getScope(); } protected DemoJob() { this.conn=Red5.getConnectionLocal(); this.client=this.conn.getClient(); this.scope=conn.getScope(); } } Then i created a simple class that extends the previous one: public class StartChallengeJob extends DemoJob { public void execute(ISchedulingService service) { log.error("test"); } } The problem is that my main application can only see the constructor without any parameters. with means i can do new StartChallengeJob() why doesn't the main application sees all the constructors ? thanks!

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• How to increase the performance of a loop which runs for every 'n' minutes.

  - by GustlyWind

  Hi Giving small background to my requirement and what i had accomplished so far: There are 18 Scheduler tasks run at regular intervals (least being 30 mins) takes input of nearly 5000 eligible employees run into a static method for iteration and generates a mail content for that employee and mails. An average task takes about 9 min multiplied by 18 will be roughly 162 mins meanwhile there would be next tasks which will be in queue (I assume). So my plan is something like the below loop try { // Handle Arraylist of alerts eligible employees Iterator employee = empIDs.iterator(); while (employee.hasNext()) { ScheduledImplementation.getInstance().sendAlertInfoToEmpForGivenAlertType((Long)employee.next(), configType,schedType); } } catch (Exception vEx) { _log.error("Exception Caught During sending " + configType + " messages:" + configType, vEx); } Since I know how many employees would come to my method I will divide the while loop into two and perform simultaneous operations on two or three employees at a time. Is this possible. Or is there any other ways I can improve the performance. Some of the things I had implemented so far 1.Wherever possible made methods static and variables too Didn't bother to catch exceptions and send back because these are background tasks. (And I assume this improves performance) Get the DB values in one query instead of multiple hits. If am successful in optimizing the while loop I think i can save couple of mins. Thanks

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• Wait on multiple condition variables on Linux without unnecessary sleeps?

  - by Joseph Garvin

  I'm writing a latency sensitive app that in effect wants to wait on multiple condition variables at once. I've read before of several ways to get this functionality on Linux (apparently this is builtin on Windows), but none of them seem suitable for my app. The methods I know of are: Have one thread wait on each of the condition variables you want to wait on, which when woken will signal a single condition variable which you wait on instead. Cycling through multiple condition variables with a timed wait. Writing dummy bytes to files or pipes instead, and polling on those. #1 & #2 are unsuitable because they cause unnecessary sleeping. With #1, you have to wait for the dummy thread to wake up, then signal the real thread, then for the real thread to wake up, instead of the real thread just waking up to begin with -- the extra scheduler quantum spent on this actually matters for my app, and I'd prefer not to have to use a full fledged RTOS. #2 is even worse, you potentially spend N * timeout time asleep, or your timeout will be 0 in which case you never sleep (endlessly burning CPU and starving other threads is also bad). For #3, pipes are problematic because if the thread being 'signaled' is busy or even crashes (I'm in fact dealing with separate process rather than threads -- the mutexes and conditions would be stored in shared memory), then the writing thread will be stuck because the pipe's buffer will be full, as will any other clients. Files are problematic because you'd be growing it endlessly the longer the app ran. Is there a better way to do this? Curious for answers appropriate for Solaris as well.

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• Why does System.Net.Mail work in one part of my c#.net web app, but not in another?

  - by Marc

  I have a web application that is running on IIS within my company's domain, and is being accessed via intranet. I have this application sending out email based on some user actions. For example, its a scheduling application in part, so if a task is completed, an email is sent out notifying other users of that. The problem is, the email works flawlessly in some cases, and not at all in others. I have a login.aspx page which sends out report emails when the page is loaded (its loaded once a day via windows task scheduler) - this always seems to work perfectly. I have an update page which is supposed to send email when text is entered and the "Update" button is clicked - this operation will fail most of the time. Both of these tasks use the same static overloaded method I wrote to send email using System.Net.Mail. I have tried using gmail as my smtp server (instead of our internal one), and get the same results. I investigated whether having the local SMTP Service running makes any difference, and it doesn't seem to. Besides, since C# is server-side code, shouldn't it only matter whats running on the server, and not the client? Please help me figure out whats wrong! Where should I look? What can I try?

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• How do I make my program run with different privileges at Windows 7 startup?

  - by iira

  Hi, I am trying to add my program run in Windows 7 startup, but it doesn't work. My program has an embedded UAC manifest. My current way is by adding a string value at HKCU..\Run. I found a manual solution for Vista from http://social.technet.microsoft.com/Forums/en/w7itprosecurity/thread/81c3c1f2-0169-493a-8f87-d300ea708ecf Click Start, right click on Computer and choose “Manage”. Click “Task Scheduler” on the left panel. Click “Create Task” on the right panel. Type a name for the task. Check “Run with highest privileges”. Click Actions tab. Click “New…”. Browse to the program in the “Program/script” box. Click OK. On desktop, right click, choose New and click “Shortcut”. In the box type: schtasks.exe /run /tn TaskName where TaskName is the name of task you put in on the basics tab and click next. Type a name for the shortcut and click Finish. Additionally, you need to run the saved scheduled task shortcut to run the program instead of running the application shortcut to ignore the IAC prompt. When startup the system will run the program via the original shortcut. Therefore you need to change the location to run the saved task. Please: Open Regedit. Find the entry of the startup item in Registry. It will be stored in one of the following branches. HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run HKEY_USERS.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Run HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run Double-click on the correct key, change the path to the saved scheduled task you created. Is there any free code to add item with privileges option in scheduled task? I haven't found the free one in torry.net. Thanks a lot.

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• Windows Services in Win7?

  - by Brandi

  I am trying to make a service that spawns a desktop application, and then watches to make sure it restarts again if it is closed. . I would like it to basically spawn the process and then forget about it, allowing to act like a normal interactive application. (Apparently this is much easier to do in XP and before, but I need this for XP, Vista, and 7) My problem now is that either it shows up invisible if I use process.start() with desktop interactive checked, and if I directly spawn a form it asks "Do you REALLY want to do this?!" and then the whole screen goes blank EXCEPT for my program. I just want this to be an inoffensive background app. I have the app working well, I just need to figure out how to spawn it from a service without all the trouble. I am finding all of this stuff that says "Don't make services that have UI", but first off this was a requirement that was given to me. (Boss does not want it to be a scheduled task) Also, I noticed that the Task scheduler is itself a service, and it does not have any problem spawning user interactive applications. Why can't I do that too? What am I doing wrong?

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• Preventing a heavy process from sinking in the swap file

  - by eran

  Our service tends to fall asleep during the nights on our client's server, and then have a hard time waking up. What seems to happen is that the process heap, which is sometimes several hundreds of MB, is moved to the swap file. This happens at night, when our service is not used, and others are scheduled to run (DB backups, AV scans etc). When this happens, after a few hours of inactivity the first call to the service takes up to a few minutes (consequent calls take seconds). I'm quite certain it's an issue of virtual memory management, and I really hate the idea of forcing the OS to keep our service in the physical memory. I know doing that will hurt other processes on the server, and decrease the overall server throughput. Having that said, our clients just want our app to be responsive. They don't care if nightly jobs take longer. I vaguely remember there's a way to force Windows to keep pages on the physical memory, but I really hate that idea. I'm leaning more towards some internal or external watchdog that will initiate higher-level functionalities (there is already some internal scheduler that does very little, and makes no difference). If there were a 3rd party tool that provided that kind of service is would have been just as good. I'd love to hear any comments, recommendations and common solutions to this kind of problem. The service is written in VC2005 and runs on Windows servers.

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• different thread accessing MemoryStream

  - by Wayne

  There's a bit of code which writes data to a MemoryStream object directly into it's data buffer by calling GetBuffer(). It also uses and updates the Position and SetLength() properties appropriately. This code works purposes 99.9999% of the time. Literally. Only every so many 100,000's of iterations it will barf. The specific problem is that the memory.Position property suddenly returns zero instead of the appropriate value. However, code was added that checks for the 0 and throws an exception which include log of the MemoryStream properties like Position and Length in a separate method. Those return the correct value. Further addition shows that when this rare condition occurs, the memory.Position only has zero inside this particular method. Okay. Obviously, this must be a threading issue. But this code is well locked. However, the nature of this software is that it's organized by "tasks" with a scheduler and so any one of several actual O/S thread may run this code at any give time--but never more than one at a time. So it's my guess that ordinarily it so happens that the same thread keeps getting used for this method and then on a rare occasion a different thread get used. Then due to compiler optimizations, the different thread never gets the correct value. It gets a "stale" value. Ordinarily in a situation like this I would apply a "volatile" keyword to the variable in question. But that (those) variables are inside the MemoryStream object. Does anyone have any other idea? Or does this mean we have to implement our own MemoryStream object? (Just like we end up having to do with practically every collection in .NET?) It's a shame to have such an awesome platform as .NET and have virtually the entire system useless as-is for seriously parallelized applications. If I'm wrong or you have other ideas, please advise. Sincerely, Wayne

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• localhost yes but phpmyadmin blank

  - by Giskin Leow

  WAMP people having problem with both localhost and phpmyadmin loads blank which usually the port problem. Mine is only phpmyadmin blank. sqlbuddy and phpinfo no problem. tried uninstall reinstalled wamp. tried xampp, same problem, all works well, not phpmyadmin. mysql log: 120905 8:03:08 [Note] Plugin 'FEDERATED' is disabled. 120905 8:03:08 InnoDB: The InnoDB memory heap is disabled 120905 8:03:08 InnoDB: Mutexes and rw_locks use Windows interlocked functions 120905 8:03:08 InnoDB: Compressed tables use zlib 1.2.3 120905 8:03:09 InnoDB: Initializing buffer pool, size = 128.0M 120905 8:03:09 InnoDB: Completed initialization of buffer pool 120905 8:03:09 InnoDB: highest supported file format is Barracuda. 120905 8:03:09 InnoDB: Waiting for the background threads to start 120905 8:03:10 InnoDB: 1.1.8 started; log sequence number 1595675 120905 8:03:11 [Note] Server hostname (bind-address): '(null)'; port: 3306 120905 8:03:11 [Note] - '(null)' resolves to '::'; 120905 8:03:11 [Note] - '(null)' resolves to '0.0.0.0'; 120905 8:03:11 [Note] Server socket created on IP: '0.0.0.0'. 120905 8:03:13 [Note] Event Scheduler: Loaded 0 events 120905 8:03:13 [Note] wampmysqld: ready for connections. apache log [Wed Sep 05 08:03:09 2012] [notice] Apache/2.2.22 (Win32) PHP/5.4.3 configured -- resuming normal operations [Wed Sep 05 08:03:09 2012] [notice] Server built: May 13 2012 13:32:42 [Wed Sep 05 08:03:09 2012] [notice] Parent: Created child process 3812 [Wed Sep 05 08:03:09 2012] [notice] Child 3812: Child process is running [Wed Sep 05 08:03:09 2012] [notice] Child 3812: Acquired the start mutex. [Wed Sep 05 08:03:09 2012] [notice] Child 3812: Starting 64 worker threads. [Wed Sep 05 08:03:09 2012] [notice] Child 3812: Starting thread to listen on port 80. [Wed Sep 05 08:03:09 2012] [notice] Child 3812: Starting thread to listen on port 80. [Wed Sep 05 08:04:14 2012] [error] [client 127.0.0.1] File does not exist: C:/wamp/www/favicon.ico [Wed Sep 05 08:09:50 2012] [error] [client 127.0.0.1] File does not exist: C:/wamp/www/favicon.ico [Wed Sep 05 08:41:03 2012] [error] [client 127.0.0.1] File does not exist: C:/wamp/www/phpMyAdmin

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• Built in background-scheduling system in .NET?

  - by Lasse V. Karlsen

  I ask though I doubt there is any such system. Basically I need to schedule tasks to execute at some point in the future (usually no more than a few seconds or possibly minutes from now), and have some way of cancelling that request unless too late. Ie. code that would look like this: var x = Scheduler.Schedule(() => SomethingSomething(), TimeSpan.FromSeconds(5)); ... x.Dispose(); // cancels the request Is there any such system in .NET? Is there anything in TPL that can help me? I need to run such future-actions from various instances in a system here, and would rather avoid each such class instance to have its own thread and deal with this. Also note that I don't want this (or similar, for instance through Tasks): new Thread(new ThreadStart(() => { Thread.Sleep(5000); SomethingSomething(); })).Start(); There will potentially be a few such tasks to execute, they don't need to be executed in any particular order, except for close to their deadline, and it isn't vital that they have anything like a realtime performance concept. I just want to avoid spinning up a separate thread for each such action.

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• Kill process started with System.Diagnostic.Process.Start("FileName")

  - by PedroC88

  Hello; I am trying to create an app that will perform actions on specific times (much like the Windows Task Scheduler). I am currently using Process.Start() to lunch the file (or exe) required by the task. I am initiating a process by calling a file (an .mp3) and the process starts WMP (since it is the default application), so far so good. Now I wan't to kill that process. I know that it is normal behavior for the Process.Start(string, string) to return nothing (null in C#) in this case. So I am asking how can i close WMP when I called it through Process.Start(string, string)?? Edit: Please note that I am not opening WMP directly with Process.Start() and this is the line with which I run the process: VB: Me._procs.Add(Process.Start(Me._procInfo)) C#: this._procs.Add(Process.Start(this._procInfo)) _procInfo is a ProcessStartInfo instance. _procInfo.FileName is "C:\route\myFile.mp3". That is why WMP opens. In any case, all of the Start() methods, except for the instance-one which returns a boolean, return nothing (null in C#), because WMP is not the process that was directly created (please note that WMP is run and the song does play).

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• Parallelism in .NET – Part 19, TaskContinuationOptions

  - by Reed

  My introduction to Task continuations demonstrates continuations on the Task class.  In addition, I’ve shown how continuations allow handling of multiple tasks in a clean, concise manner.  Continuations can also be used to handle exceptional situations using a clean, simple syntax. In addition to standard Task continuations , the Task class provides some options for filtering continuations automatically.  This is handled via the TaskContinationOptions enumeration, which provides hints to the TaskScheduler that it should only continue based on the operation of the antecedent task. This is especially useful when dealing with exceptions.  For example, we can extend the sample from our earlier continuation discussion to include support for handling exceptions thrown by the Factorize method: // Get a copy of the UI-thread task scheduler up front to use later var uiScheduler = TaskScheduler.FromCurrentSynchronizationContext(); // Start our task var factorize = Task.Factory.StartNew( () => { int primeFactor1 = 0; int primeFactor2 = 0; bool result = Factorize(10298312, ref primeFactor1, ref primeFactor2); return new { Result = result, Factor1 = primeFactor1, Factor2 = primeFactor2 }; }); // When we succeed, report the results to the UI factorize.ContinueWith(task => textBox1.Text = string.Format("{0}/{1} [Succeeded {2}]", task.Result.Factor1, task.Result.Factor2, task.Result.Result), CancellationToken.None, TaskContinuationOptions.NotOnFaulted, uiScheduler); // When we have an exception, report it factorize.ContinueWith(task => textBox1.Text = string.Format("Error: {0}", task.Exception.Message), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, uiScheduler); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } The above code works by using a combination of features.  First, we schedule our task, the same way as in the previous example.  However, in this case, we use a different overload of Task.ContinueWith which allows us to specify both a specific TaskScheduler (in order to have your continuation run on the UI’s synchronization context) as well as a TaskContinuationOption.  In the first continuation, we tell the continuation that we only want it to run when there was not an exception by specifying TaskContinuationOptions.NotOnFaulted.  When our factorize task completes successfully, this continuation will automatically run on the UI thread, and provide the appropriate feedback. However, if the factorize task has an exception – for example, if the Factorize method throws an exception due to an improper input value, the second continuation will run.  This occurs due to the specification of TaskContinuationOptions.OnlyOnFaulted in the options.  In this case, we’ll report the error received to the user. We can use TaskContinuationOptions to filter our continuations by whether or not an exception occurred and whether or not a task was cancelled.  This allows us to handle many situations, and is especially useful when trying to maintain a valid application state without ever blocking the user interface.  The same concepts can be extended even further, and allow you to chain together many tasks based on the success of the previous ones.  Continuations can even be used to create a state machine with full error handling, all without blocking the user interface thread.

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• Framework 4 Features: Support for Timed Jobs

  - by Anthony Shorten

  One of the new features of the Oracle Utilities Application Framework V4 is the ability for the batch framework to support Timed Batch. Traditionally batch is associated with set processing in the background in a fixed time frame. For example, billing customers. Over the last few versions their has been functionality required by the products required a more monitoring style batch process. The monitor is a batch process that looks for specific business events based upon record status or other pieces of data. For example, the framework contains a fact monitor (F1-FCTRN) that can be configured to look for specific status's or other conditions. The batch process then uses the instructions on the object to determine what to do. To support monitor style processing, you need to run the process regularly a number of times a day (for example, every ten minutes). Traditional batch could support this but it was not as optimal as expected (if you are a site using the old Workflow subsystem, you understand what I mean). The Batch framework was extended to add additional facilities to support times (and continuous batch which is another new feature for another blog entry). The new facilities include: The batch control now defines the job as Timed or Not Timed. Non-Timed batch are traditional batch jobs. The timer interval (the interval between executions) can be specified The timer can be made active or inactive. Only active timers are executed. Setting the Timer Active to inactive will stop the job at the next time interval. Setting the Timer Active to Active will start the execution of the timed job. You can specify the credentials, language to view the messages and an email address to send the a summary of the execution to. The email address is optional and requires an email server to be specified in the relevant feature configuration. You can specify the thread limits and commit intervals to be sued for the multiple executions. Once a timer job is defined it will be executed automatically by the Business Application Server process if the DEFAULT threadpool is active. This threadpool can be started using the online batch daemon (for non-production) or externally using the threadpoolworker utility. At that time any batch process with the Timer Active set to Active and Batch Control Type of Timed will begin executing. As Timed jobs are executed automatically then they do not appear in any external schedule or are managed by an external scheduler (except via the DEFAULT threadpool itself of course). Now, if the job has no work to do as the timer interval is being reached then that instance of the job is stopped and the next instance started at the timer interval. If there is still work to complete when the interval interval is reached, the instance will continue processing till the work is complete, then the instance will be stopped and the next instance scheduled for the next timer interval. One of the key ways of optimizing this processing is to set the timer interval correctly for the expected workload. This is an interesting new feature of the batch framework and we anticipate it will come in handy for specific business situations with the monitor processes.

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• SQL SERVER – CXPACKET – Parallelism – Advanced Solution – Wait Type – Day 7 of 28

  - by pinaldave

  Earlier we discussed about the what is the common solution to solve the issue with CXPACKET wait time. Today I am going to talk about few of the other suggestions which can help to reduce the CXPACKET wait. If you are going to suggest that I should focus on MAXDOP and COST THRESHOLD – I totally agree. I have covered them in details in yesterday’s blog post. Today we are going to discuss few other way CXPACKET can be reduced. Potential Reasons: If data is heavily skewed, there are chances that query optimizer may estimate the correct amount of the data leading to assign fewer thread to query. This can easily lead to uneven workload on threads and may create CXPAKCET wait. While retrieving the data one of the thread face IO, Memory or CPU bottleneck and have to wait to get those resources to execute its tasks, may create CXPACKET wait as well. Data which is retrieved is on different speed IO Subsystem. (This is not common and hardly possible but there are chances). Higher fragmentations in some area of the table can lead less data per page. This may lead to CXPACKET wait. As I said the reasons here mentioned are not the major cause of the CXPACKET wait but any kind of scenario can create the probable wait time. Best Practices to Reduce CXPACKET wait: Refer earlier article regarding MAXDOP and Cost Threshold. De-fragmentation of Index can help as more data can be obtained per page. (Assuming close to 100 fill-factor) If data is on multiple files which are on multiple similar speed physical drive, the CXPACKET wait may reduce. Keep the statistics updated, as this will give better estimate to query optimizer when assigning threads and dividing the data among available threads. Updating statistics can significantly improve the strength of the query optimizer to render proper execution plan. This may overall affect the parallelism process in positive way. Bad Practice: In one of the recent consultancy project, when I was called in I noticed that one of the ‘experienced’ DBA noticed higher CXPACKET wait and to reduce them, he has increased the worker threads. The reality was increasing worker thread has lead to many other issues. With more number of the threads, more amount of memory was used leading memory pressure. As there were more threads CPU scheduler faced higher ‘Context Switching’ leading further degrading performance. When I explained all these to ‘experienced’ DBA he suggested that now we should reduce the number of threads. Not really! Lower number of the threads may create heavy stalling for parallel queries. I suggest NOT to touch the setting of number of the threads when dealing with CXPACKET wait. Read all the post in the Wait Types and Queue series. Note: The information presented here is from my experience and I no way claim it to be accurate. I suggest reading book on-line for further clarification. All the discussion of Wait Stats over here is generic and it varies by system to system. You are recommended to test this on development server before implementing to production server. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: DMV, Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, SQL Wait Stats, SQL Wait Types, T SQL, Technology

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• Install Oracle Configuration Manager's Standalone Collector

  - by Get Proactive Customer Adoption Team

  Untitled Document The Why and the How If you have heard of Oracle Configuration Manager (OCM), but haven’t installed it, I’m guessing this is for one of two reasons. Either you don’t know how it helps you or you don’t know how to install it. I’ll address both of those reasons today. First, let’s take a quick look at how My Oracle Support and the Oracle Configuration Manager work together to gain a good understanding of what their differences and roles are before we tackle the install.   Oracle Configuration Manger is the tool that actually performs the data collection task. You deploy this lightweight piece of software into your system to collect configuration information about the system and OCM uploads that data to Oracle’s customer configuration repository. Oracle Support Engineers then have the configuration data available when you file a service request. You can also view the data through My Oracle Support. The real value is that the data Oracle Configuration Manager collects can help you avoid problems and get your Service Requests solved more quickly. When you view the information in My Oracle Support’s user interface to OCM, it may help you avoid situations that create problems. The proactive tools included in Oracle Configuration Manager help you avoid issues before they occur. You also save time because you didn’t need to open a service request. For example, you can use this capability when you need to compare your system configuration at two points in time, or monitor the system health. If you make the configuration data available to Oracle Support Engineers, when you need to open a Service Request the data helps them diagnose and resolve your critical system issues more quickly, which means you get answers more quickly too. Quick Installation Process Overview Before we dive into the step-by-step details, let me provide a quick overview. For some of you, this will be all you need. Log in to My Oracle Support and download the data collector from Collector tab. If you don’t see the Collector tab, click the More tab gain access. On the Collector tab, you will find a drop-down list showing which platforms are available. You can also see more ways to the Collector can help you if you click through the carousel of benefits. After you download the software for your platform, use FTP to move that file (.zip) from your PC to the server that hosts the Oracle software. Once you have that file on the server, locate the $ORACLE_HOME directory, and unzip the file within that directory. You can then use the command line tool to start the installation process. The installation process requires the My Oracle Support credential (Support Identifier, username, and password) Proxy specification (Host IP Address, Port number, username and password) Installation Step-by-Step Download the collector zip file from My Oracle Support and place it into your $Oracle_Home Unzip the zip file you downloaded from My Oracle Support – this will create a directory named CCR with several subdirectories Using the command line go to “$ORACLE_HOME/CCR/bin” and run the following command “setupCCR” Provide your My Oracle Support credential: login, password, and Support Identifier The installer will start deploying the collector application You have installed the Collector Post Installation Now that you have installed successfully, the scheduler is ready to collect configuration information for the software available in your Oracle Home. By default, the first collection will take place the day after the installation. If you want to run an instrumentation script to start the configuration collection of your Oracle Database server, E-Business Suite, or Enterprise Manager, you will find more details on that in the Installation and Administration Guide for My Oracle Support Configuration Manager. Related documents available on My Oracle Support Oracle Configuration Manager Installation and Administration Guide [ID 728989.5] Oracle Configuration Manager Prerequisites [ID 728473.5] Oracle Configuration Manager Network Connectivity Test [ID 728970.5] Oracle Configuration Manager Collection Overview [ID 728985.5] Oracle Configuration Manager Security Overview [ID 728982.5] Oracle Software Configuration Manager: Disconnected Mode Collection [ID 453412.1]

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