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Browser widget problem [message #1032312]

Tue, 02 April 2013 17:17

Eclipse User

Hello
I have permanently problem with browser widget after operation setText.
I create one copy widget and after refresh only.
Dmitry

java.io.FileNotFoundException: .......\rwt-resources\org.eclipse.swt.browser\text612072251.html (The requested operation cannot be performed on a file with a user-mapped section open)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)

Re: Browser widget problem [message #1032619 is a reply to message #1032312]

Wed, 03 April 2013 04:04

Eclipse User

Hi.

Can you provide an example EntryPoint to reproduce the issue?

Greetings,
Tim

--
Tim Buschtöns

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
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Re: Browser widget problem [message #1035315 is a reply to message #1032619]

Sat, 06 April 2013 13:43

Eclipse User

Composite grpBrowser = new Composite(grpMain, SWT.BORDER);
GridData data = new GridData(GridData.FILL_HORIZONTAL | GridData.FILL_VERTICAL);
data.heightHint = 250;
grpBrowser.setLayoutData(data);

browser = new Browser(grpBrowser, SWT.BORDER);
browser.setText("Emty");

and when I select item from my table I use

String html = rs.getTObject(0).get("BIGREPORT");
browser.setText(html);

swt application with same code is working correctly

Re: Browser widget problem [message #1035327 is a reply to message #1035315]

Sat, 06 April 2013 14:03

Eclipse User

And
How can I clear rwt-resources\org.eclipse.swt.browser\?

Re: Browser widget problem [message #1036487 is a reply to message #1035315]

Mon, 08 April 2013 08:46

Eclipse User

> and when I select item from my table I use
> String html = rs.getTObject(0).get("BIGREPORT");
> browser.setText(html);
>

So what value is "html"?

--
Tim Buschtöns

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/

Re: Browser widget problem [message #1036828 is a reply to message #1036487]

Mon, 08 April 2013 17:49

Eclipse User

html is just html-report from db.

On 08.04.2013 16:46, Tim Buschtöns wrote:
>
>> and when I select item from my table I use
>> String html = rs.getTObject(0).get("BIGREPORT");
>> browser.setText(html);
>>
>
> So what value is "html"?
>

Re: Browser widget problem [message #1037163 is a reply to message #1036828]

Tue, 09 April 2013 04:28

Eclipse User

Dmitry,

the snippet below works for me. Maybe the problem is only reproducible
on a Windows filesystem? If you can reproduce the problem with a snippet
like this, then please open a bug.

Regards, Ralf

public class BrowserSnippet extends AbstractEntryPoint {

@Override
public void createContents( Composite parent ) {
parent.setLayout( new GridLayout() );
final Browser browser = new Browser( parent, SWT.BORDER );
browser.setText( "Empty" );
browser.setLayoutData( new GridData( SWT.FILL, SWT.FILL, true, true
) );
Button button = new Button( parent, SWT.PUSH );
button.setText( "change content" );
button.addListener( SWT.Selection, new Listener() {
@Override
public void handleEvent( Event event ) {
browser.setText( "Some other text " + UUID.randomUUID() );
}
} );
}

}

--
Ralf Sternberg

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/

Re: Browser widget problem [message #1037175 is a reply to message #1036828]

Tue, 09 April 2013 04:40

Eclipse User

Sorry, but this is not enough information to reproduce the issue. I need
a complete EntryPoint, or better yet a complete Project that I can run
and reproduce the issue with. I used the few lines you gave me to create
an entry point (see below), but as expected this very simple application
behaves exactly that way it should. If the app crashes when you set the
"html" String, it is important to know exactly what state the
application is in at that moment and what the value of "html" is. I also
need to know which RAP version and which browser you are using.

public class BrowserCrash extends AbstractEntryPoint {

@Override
protected void createContents( Composite parent ) {
Composite grpBrowser = new Composite(parent, SWT.BORDER);
GridData data = new GridData(GridData.FILL_HORIZONTAL |
GridData.FILL_VERTICAL);
data.heightHint = 250;
grpBrowser.setLayoutData(data);
grpBrowser.setLayout( new FillLayout() );

Browser browser = new Browser(grpBrowser, SWT.BORDER);
browser.setText("Emty");
browser.setText( "A report??" );
}

}

Am 08.04.2013 23:49, schrieb Dmitry:
> html is just html-report from db.
>
> On 08.04.2013 16:46, Tim Buschtöns wrote:
>>
>>> and when I select item from my table I use
>>> String html = rs.getTObject(0).get("BIGREPORT");
>>> browser.setText(html);
>>>
>>
>> So what value is "html"?
>>
>

--
Tim Buschtöns

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/

Re: Browser widget problem [message #1041982 is a reply to message #1037175]

Mon, 15 April 2013 17:14

Eclipse User

This is simple code with browser's problem.

First code works correctly.

run new ViewAlerts().show(parentGrp) again and upssss "The requested operation cannot be performed on a file with a user-mapped section open"

public class ViewAlerts {


	public ViewAlerts() {
	}

	protected Composite viewHistory(final Composite parentTab) {

	    Composite grpBrowser = new Composite(parentTab, SWT.BORDER);
	    GridData data = new GridData(GridData.FILL_HORIZONTAL | GridData.FILL_VERTICAL);
	    data.heightHint = 250;
	    grpBrowser.setLayoutData(data);
	    grpBrowser.setLayout( new FillLayout() );

	    Browser browser = new Browser(grpBrowser, SWT.BORDER);
	    browser.setText("Emty");
	    browser.setText( "A report??" ); 
	    return grpBrowser;
	}

	public void show(Composite parent) {
		TabFolder tabFolder = new TabFolder(parent, SWT.NONE);

		TabItem tabHistory = new TabItem(tabFolder, SWT.NONE);
		tabHistory.setText("History of alerts");
		tabHistory.setControl(viewHistory(tabFolder));
	}

}

Re: Browser widget problem [message #1042287 is a reply to message #1041982]

Tue, 16 April 2013 04:16

Eclipse User

Hi Dmitry,
the posted code works for me with RAP from master (2.1M1). Which RAP
version are you using? What is your OS, JDK (x64?)? Does it happen when
you start the application from IDE (Jetty) or you are deploying it to an
external servlet container as Tomcat?
Best,
Ivan

On 4/16/2013 12:14 AM, Dmitry Dukhov wrote:
> This is simple code with browser's problem.
>
> First code works correctly.
>
> run new ViewAlerts().show(parentGrp) again and upssss "The requested
> operation cannot be performed on a file with a user-mapped section open"
>
>
>
> public class ViewAlerts {
>
>
> public ViewAlerts() {
> }
>
> protected Composite viewHistory(final Composite parentTab) {
>
> Composite grpBrowser = new Composite(parentTab, SWT.BORDER);
> GridData data = new GridData(GridData.FILL_HORIZONTAL |
> GridData.FILL_VERTICAL);
> data.heightHint = 250;
> grpBrowser.setLayoutData(data);
> grpBrowser.setLayout( new FillLayout() );
>
> Browser browser = new Browser(grpBrowser, SWT.BORDER);
> browser.setText("Emty");
> browser.setText( "A report??" ); return grpBrowser;
> }
>
> public void show(Composite parent) {
> TabFolder tabFolder = new TabFolder(parent, SWT.NONE);
>
> TabItem tabHistory = new TabItem(tabFolder, SWT.NONE);
> tabHistory.setText("History of alerts");
> tabHistory.setControl(viewHistory(tabFolder));
> }
>
> }
>

--
Ivan Furnadjiev

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/

Re: Browser widget problem [message #1042758 is a reply to message #1042287]

Tue, 16 April 2013 16:58

Eclipse User

- use 2.1m1
- 32-bit Java.
- embedded Jetty

Re: Browser widget problem [message #1042996 is a reply to message #1042758]

Wed, 17 April 2013 02:12

Eclipse User

Dmitry,
this is really an interesting problem. As no one from as can reproduce
it by the snippets posted by you, could you create a complete simple
project ready for import and start that demonstrate the issue.
Thanks,
Ivan

On 4/16/2013 11:58 PM, Dmitry Dukhov wrote:
>
> - use 2.1m1
> - 32-bit Java.
> - embedded Jetty
>
>
>

--
Ivan Furnadjiev

Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/

Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/

Re: Browser widget problem [message #1393134 is a reply to message #1042996]

Thu, 03 July 2014 05:37

Eclipse User

Also it is a very old thread, i want to mention my solution:
I could reproduce the error with embedded jetty on windows.
Following reason:
Jetty buffers static content for webapps such as html files, css files, images etc and uses memory mapped files to do this if the NIO connectors are being used. The problem is that on Windows, memory mapping a file causes the file to be locked, so that the file cannot be updated or replaced. This means that effectively you have to stop Jetty in order to update a file
Solution:

webAppContext.setInitParameter(org.eclipse.jetty.servlet.Default.useFileMappedBuffer", "false");

and everything works fine.

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