Should PreparedStatement close before continue next PreparedStatement ?
Hi guys,
For instance, I need to use PreparedStatement for several insert and update like below:
Connection conn; // got the connection
PreparedStatement pstmt = conn.prepareStatement("insert ......");
pstmt.addBatch();
pstmt.executeBatch();
*// should I do a pstmt.close() here ?????????*
pstmt = conn.prepareStatement("update......");
pstmt.addBatch();
pstmt.executeBatch();
Thanks & Regards,
Mark
kmthien wrote:
Yes, I am using apache DBCP and using the example code here :
http://www.freshblurbs.com/jakarta-commons-dbcp-tutorial#comment-544
However, In my class, I need to connect to 2 database, 1 is local and another 1 is remote.Location doesn't matter.
I don't know how to create and initialize 2 connection pooling as when I initialize 2 connection pooling, it jus treated it as 1 only.This is of course completely different from your first question. Did you google?
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I'm using the same PreparedStatement object for many querys on a method, I think this is ok, isn't it? So... Do I need to call the PreparedStatement.close() method between every query? Can I call the close method many times without calling the executeQuery() method?
Thanks
Eduardo CastorDo not close the PreparedStatement until your program ends (or until you do not need it any more). You can use it repeatedly without closing it.
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PreparedStatement.close() hangs, blocking finalization
We encountered an incident on a production system with a class that would call PreparedStatement.close() on finalize(), and there was an instance where the jvm finalizer thread stalled on this the PreparedStatement.close() call, blocking garbage collection.
The last sql statement run with the preparedstatement was most probably a select statement (we cannot determine for sure), and the OCI driver was used.
While I realize it's not recommended to close PreparedStatements on finalize(), can I ask for some possible reasons why the close() call would stall? Would it be a database issue or a java issue?Can you do the close() in a PhantomReference? That might be a good alternative to using finalize(). These refs are rather obscure and most Java authors parrot the usual line about post-mortem cleanup, but if you dig deep enough you can find a few examples of its use (I think that there is Apache group source with an example).
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Should I close Parallels before installing Mountain Lion?
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Revision: 9407
Author: [email protected]
Date: 2009-08-19 15:11:34 -0700 (Wed, 19 Aug 2009)
Log Message:
Reordering the if-statement in isMeasureFixed() exposed that hostFormat can be null when measure() is called if styles changed and measure is done before the next commitProperties. This states test exposed this.
We should rethink if we want to clear hostFormat rather than have a hostFormatChanged flag. If there is no hostFormat at measure then it has to be fixed because there is no line break format to check for auto-size.
QE notes:
Doc notes:
Bugs: SDK-22779
Reviewer: Gordon
Tests run: checkintests
Is noteworthy for integration: no
Ticket Links:
http://bugs.adobe.com/jira/browse/SDK-22779
Modified Paths:
flex/sdk/trunk/frameworks/projects/spark/src/spark/primitives/RichEditableText.asOh my god, it is too long! You definitely check out types, casting and especially ODP.Net (it does everything for you)... etc. They can help you to simplify your code. I do not have enough time to copy paste it to Studio and understand and solve your issue, so I got title of your message as your main question.
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Hi all,
Basic, but quite infuriating problem. Because Illustrator doesn't allow palette type windows, nothing can happen whilst the dialog is open. So, I've been using scripts I wrote over six months ago now for producing sets of scale elevations of my designs with filled out title-blocks etc.. Which have literally saved me a good half-hour per drawing set I need to produce.
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Dialog closes - dlg.close()
My Scaling operation occurs
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then undoes the action - app.undo()
and reopens the dialog - dlg.show()
Every one of these events is tried and tested.. But they occur out of order when I run the script because each action runs at a different rate. setTimeout also doesn't work in Adobe's javascript (at least not in Illustrator), so I can't individually delay items.
So I've been testing bits in isolation to troubleshoot.. And I'm most concerned that the dialog close before any actions run - as this seems to cause the hold-up. A friend who is far more adept than I tells me it's because the dialog takes ownership, and as such the script dies if the dialog closes. If this is the case, is there a way I can create a false parent or prevent the dialog from doing this?
Try this code to see what I mean - clicking test should close the dialog, pause for three seconds and display its message.
If you comment out the while and if statements and their respective closing braces, you'll see that the dialog holds before closing. That code is there to ensure it closes before doing anything.
You should run this from Extendscript so you can halt it - else it will loop indefinitely. Note that Extendscript does behave differently; Illustrator halts when you click test, Extendscript appears to close the dialog but does nothing thereafter, however it still loops.
var test;
// Pause Function
function pause(msec)
var done = null;
var date = new Date();
var curDate = null;
do curDate = new Date();
while(curDate-date < msec);
var done = 1;
return done;
dlg = new Window('dialog', 'Parameter Entry', [0,0,480,384]);
dlg.center();
dlg.testField = dlg.add('panel', [20,65,460,105], 'Scale Factor');
dlg.testField.titleEt = dlg.testField.add('button', [385,5,420,25], 'Test', {name: 'testButton'});
dlg.add('button', [315,337,385,360], 'OK', {name: 'ok'});
dlg.add('button', [395,337,465,360], 'Cancel', {name: 'cancel'});
function testButtonOnClick()
dlg.closeresult = dlg.close(1);
while (dlg.closeresult < 1) {
if (dlg.closeresult == 1) {
pause(3000);
alert('If you can make this display - email me!');
// TEST SEQUENCE (CLOSE DIALOG, SCALE IMAGE, 3SEC PAUSE, UNDO, REOPEN DIALOG)
dlg.testField.testButton.onClick = testButtonOnClick;
dlg.result = dlg.show();
if (dlg.result == 1) { // OK
// MAIN PROGRAM CODEErm, well, I'd say that your nested loop will have 100 iterations. I assume you are missing a break statement somewhere but as I don't know your application...
One other observation - surely the if statement (in the else if) is not required? Either something is equals or it is not?
Whoops - sorry - 81 iterations as pointed out below!
Edited by: Tom.Sanders on 12-Apr-2008 19:37 -
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** Is it possible to skip messages with error in BPM and continue next msg
Hi Friends,
I am doing File to File BPM scenario. My Source XML is like as below.
<?xml version="1.0" encoding="UTF-8"?>
<ns0:Employee xmlns:ns0="http://www.test.com/XITEST/FileToFile/BPM">
<Details>
<EmpCode>10010</EmpCode>
<EmpName>Jeg</EmpName>
<***>M</***>
<BasicPay>5000</BasicPay>
</Details>
<Details>
<EmpCode>10011</EmpCode>
<EmpName>Praksh</EmpName>
<***>M</***>
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<Details>
<EmpCode>10012</EmpCode>
<EmpName>Nithya</EmpName>
<***>F</***>
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<Details>
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<EmpName>Sunil</EmpName>
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</Details>
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</Details>
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</Details>
</ns0:Employee>
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b) Block Step (Mode : For Each) to process one by one message
c) in the Container Step, thru XPath expression we created one variable and assign '***' to that variable
d) In the Switch step we check whether variable is 'F' (Female). If it is there we insert control step to throw exception. (But, exception Branch is not added to catch the exception. The reason is that to restart the BPM)
e) If the *** is 'M' we insert Send Step to send the employee to the output file.
Note that if we insert exception handler branch, the BPM will tell this is completed. So, we are not able to restart those records (*** = 'F') after correct ***. Once the BPM is completed, that work item will not come in tcode 'Continue Process Following Error' option in tcode SXMB_MONI_BPE
Requirement is whenever the BPM encounters *** = 'F', it should throw an error and the same time BPM should not stop and continue with the next records.
Friends, we tried all the ways thru 'Queue Assignment' property of the BPM and made settings thru tcode SWF_INB_CONF. But, we are not able to achive this requirmenent.
'Restart possibilitye of the BPM for the error record and the same time should process the remaining correct records'.
Any idea friends, to solve this issue.
Kindly Reply,
Jeg P.Use one more Receiver Abstract interface for this and do the message and interface mapping .
Collecting :
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Else you send that message to the target(else branch)
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HELLO, MY PRIMARY QUESTION: Apparently compacting is part of deletion. But should one Compact before Deleting TB email or Vice Versa OR does it matter which comes first?
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Why should we close a connection
Hi,
Connection conn = DriverManager.getConnection (databaseUrl, userName, userPassword);
Why should we close a connection
conn.close();
Even when i give no "close command", it works !
Thank You
Edited by: ashipj on ?? ????????, ???? ?:?? ???????My code frequently fetches data from database, so i created a class like this
public class ConnectToDatabase
/* public ConnectToDatabase()
Connection conn;
public ResultSet selectS(String userQuery) throws Exception
String userName = "root";
String userPassword = "gal";
String databaseUrl = "jdbc:mysql://localhost:3306/test";
Class.forName ("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection (databaseUrl, userName, userPassword);
String query = userQuery;
Statement S=conn.createStatement();
ResultSet RS=S.executeQuery(query);
//conn.close;
return RS;
//conn.close;
/* public void closeConnection()
conn.close;
}and from the main code i make call as given below (it works fine)
ConnectToDatabase CTD=new ConnectToDatabase();
ResultSet result=CTD.selectS(String userQuery);
//CTD.closeConnection();Now my problem is
1) If try to give "conn.close()" before "return RS;" It will show error (RS cannot be fetched after closing connectio)
2) If write conn.close after return it wont be executed (ofcourse - unreachable statement)
3) If use "CTD.closeConnection();" it gives errror saying that "cannot find conn(in closeConnection()) " i dont know why constructor is noy loaded. -
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