It seems that jdb cannot accept commands from command line, so we must use expect. I created the following expect script dumpthreads You can use it like: dumpthreads java_process_pid #!/usr/bin/expect set pid [lindex $argv 0]; spawn jdb -connect sun.jvm.hotspot.jdi.SAPIDAttachingConnector:pid=$pid; expect “>”; send “threads\n”; expect “>”; send “quit\n”;
How to convince the SmartGWT ListGrid to automatically fetch from the server only the data it displays
Since I was looking all over the net how to do this and I only found pieces of information, here is an example: [java] public class OperationsGrid extends ListGrid{ OperationsGrid(){ super(); TreeGridField accNoField = new TreeGridField(“accountNo”, 150); TreeGridField commentField = new TreeGridField(“comment”, 150); setFields(accNoField,commentField); setHeight100(); setWidth100(); setAutoFetchData(true); setAlternateRecordStyles(true); setDataSource(OperationsDS.getInstance()); setShowFilterEditor(true); } } [/java] [java] public…
MySQL Java SQLException error codes enum
Because I had this problem and I could not find a list of MySQL error codes on the Internet, I’ve decided to implement my own MySQL error codes enum. It is based on MySQL 5.1.35 sources, include/mysqld_ername.h file. Now I can do something like this: [java] catch (SQLException e) { if(e.getErrorCode() == MySQLExceptionCode.ER_DUP_ENTRY.getErrorCode()){ r =…