Java Development

[ogiprayogo]

Hi all,

Apologize for such a newbie question. I am reading the "PersistentStorage" tutorial and everyhing is clear to me except one thing.

private static long key = 0xdec6a67096f833cL;
	
static {
	_objStore = PersistentStore.getPersistentObject(key);
	synchronized(_objStore){
		if (_objStore.getContents() == null ){
			_objStore.setContents(new Vector());
			_objStore.commit();
		}
	}
	_data = (Vector) _objStore.getContents();
}

Where do you get/obtain key? Is is something that you must generate beforehand? If it is, how to generate? There is absolutely no info on this key on the tutorial.. it's just there...

[Ted_Hopp · Accepted solution]

Pick a string that's likely to be unique (say, the fully qualified name of your application's main class). Type it into a comment (to keep Eclipse from complaining):

// com.example.blackberry.MyApp

Then highlight the string, right click, and select "Convert String to Long" from the menu. Now you'll have a key. You might want to write a second line of comments to document where it came from.

I forgot where I learned this, but it was from the RIM documents somewhere. I agree that it isn't documented where you're likely to be reading when you need it (like the API docs for PersistentStore).

[ogiprayogo]

Wheew! Thank you. Exactly what I need.

I am sure a lot of other people were looking for this as well..