CODEWITHSUNDEEP
javaeclipsercpe4
unclejohn00
unclejohn00

Reputation: 149

ECLIPSE E4 - Save Workspace status

Hey guys I'd like to deal with persisted data in order to save my Application Status before quitting. Well in order to give it a try I created a dirtyable object in an MPART then added a saving handler linked to a menu entry.

Here it's: MPART: 

txtInput.addModifyListener(new ModifyListener() {
                @Override
                public void modifyText(ModifyEvent e) {
                    dirty.setDirty(true);
                }
            });

Handler:

@Execute
public void execute(EPartService partService) {
    partService.saveAll(false);
}

At the end I also removed the -clearpersistedstate argument from the running configuration but every time I launch my app, it doesn't save changes inside the MPART but only changes at perspective level E.g: If an MPART has been closed in the following execution it will be kept closed.

Any hints?

Upvotes: 1

Views: 803

Answers (2)

greg-449
greg-449

Reputation: 111142

EPartService.saveAll just calls any method annotated with @Persist in the parts. This will be done automatically when the workspace is shutdown anyway.

Note: The part must be marked as dirty for the @Persist method to be called.

So to save any details in your part you need a method:

@Persist
void save()
{
  ... save your data somewhere
}

when your part is created again you have to load your data from your saved data.

One place to save data is the MPart persisted state - access this with:

Map<String, String> persistedState = part.getPersistedState();

You can save string values in this map.

So:

@Persist
void save(MPart part)
{
   Map<String, String> persistedState = part.getPersistedState();

   persistedState.put("key for my value", "my value");
}

and retrieve it with:

@PostConstruct
void createPart(MPart part)
{
   Map<String, String> persistedState = part.getPersistedState();

   String myValue = persistedState.get("key for my value");
}

Upvotes: 1

unclejohn00
unclejohn00

Reputation: 149

Greg, well I have understood how to use the Map type but I didn't catch how my Map variable becomes "persistent". My implementation as follows: 

persistedState = part.getPersistedState();
        System.out.println(persistedState.get("1"));

...

@Persist
    public void save() {
        dirty.setDirty(false);
persistedState.put("1", "test1");
}

Obviously doesn't work when I exit the app, I stil miss the last piece of the puzzle. Has it something to do with Preference Store/ writing a file with my stuff in it?

Upvotes: 0

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