How can I set a global variable?

Because Helma processes requests in threads with possibly multiple JavaScript interpreters, you never should set a global variable simply by stating e.g. "pi = 3.141", because it would be only by chance that Helma returns the correct value for the variable pi in a later request.

If you need a global variable across several requests, you should either add an appropriate property to the application object or to the user's session data cache:

app.data.pi = 3.141;
session.data.myGlobalVar = "Hello, World!";

Anyway, if you need the variable even after Helma was restarted, there is no way around storing it persistently in the database or eventually putting it into the app.properties file.

Page last modified on 2003-05-13 14:31 by hns