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Transaction use in Graphiti [message #1153109]

Thu, 24 October 2013 07:37

Eclipse User

Hello everyboy,

I started using the property sheets everything looked fine. I created the fields and I could show the values of the clicked business object.

The thing is that I want to modify the business object using the property sheet. So i added a listener to one field:

nameText.addModifyListener(new ModifyListener(){

    @Override
        public void modifyText(ModifyEvent e) {
            Text text = (Text) e.widget;
            bo.setName(text.getText());				
        }
			
    });

It crashes because I need to use a transaction (cannot modify the business object there). The thing is that I do not know which kind of transaction I do need.

Any help will be so "thanked" =)

Best regards,

Víctor.

Re: Transaction use in Graphiti [message #1153121 is a reply to message #1153109]

Thu, 24 October 2013 07:50

Eclipse User

Hi Victor,

I had a similar problem several days ago, and I found a solution at this link. Hope this helps you.

Kind regards,
Vladimir

Re: Transaction use in Graphiti [message #1153280 is a reply to message #1153121]

Thu, 24 October 2013 10:00

Eclipse User

You can get :

TransactionalEditingDomain editingDomain = getDiagramContainer().getDiagramBehavior().getEditingDomain();

and you can edit your bo inside :

editingDomain.getCommandStack().execute(
    new RecordingCommand(editingDomain, label) {
        protected void doExecute() {
            // here
        }
});

Marek

Re: Transaction use in Graphiti [message #1159217 is a reply to message #1153280]

Mon, 28 October 2013 07:25

Eclipse User

Thank you two. Finally I did what Marek said and it worked. But there is one problem with it. This is what I have in my Section class:

//OBJECT NAME
		nameText = factory.createText(composite, "");
		data = new FormData();
		data.left = new FormAttachment(0, 100);
		data.right = new FormAttachment(100, 0);
		data.top = new FormAttachment(0, VSPACE);
		nameText.setLayoutData(data);
		nameText.addModifyListener(new ModifyListener(){

			@Override
			public void modifyText(ModifyEvent event) {
				
				e = event;
				
				TransactionalEditingDomain editingDomain = getDiagramContainer().getDiagramBehavior().getEditingDomain();
				
				editingDomain.getCommandStack().execute(
					new RecordingCommand(editingDomain, "") {
						protected void doExecute() {
					    	Text text = (Text) e.widget;
					        if(bo!=null){
								bo.setName(text.getText());

								org.eclipse.graphiti.mm.algorithms.Text t = (org.eclipse.graphiti.mm.algorithms.Text) cs
										.getGraphicsAlgorithm();
								t.setValue(bo.getName());
					        }
					        	
					    }
				});
		        			
			}
			
		});

When the pictogram object is already created everything is ok. But when I create the object for the first time, as it is selected when you create it, this code is executed and this time it crashes (when bo.setName(text.getText()); is executed).

It tells me to use it inside a write transaction (BUT THIS IS WHAT I AM DOING! =) )

Any idea? thanks again,

Víctor.

Re: Transaction use in Graphiti [message #1160803 is a reply to message #1159217]

Tue, 29 October 2013 07:06

Eclipse User

Victor,

not sure, could it be that the write transaction for the creation is still
open? In that case another write transaction would not be allowed.

Michael

Re: Transaction use in Graphiti [message #1161034 is a reply to message #1160803]

Tue, 29 October 2013 10:33

Eclipse User

Victor,

If this happens only on fresh created element, there's a chance you're creating it in a different EditionDomain. A quick test would be to reorder the code. Try this:

	org.eclipse.graphiti.mm.algorithms.Text t = (org.eclipse.graphiti.mm.algorithms.Text) cs.getGraphicsAlgorithm();
	t.setValue(text.getText());
	bo.setName(text.getText());

.

If it fails in the bo.setName, but not in the t.setValue, bo is inside a different EditingDomain. If that's the case, review how do you read or update the object to make sure you use the same Editing Domain

Re: Transaction use in Graphiti [message #1216486 is a reply to message #1161034]

Thu, 28 November 2013 08:54

Eclipse User

In my project I rather avoid setting initial values in property sheets. For me this task fits much more to CreateFeature.

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