Re: basemap loaded + displayed

[Michael Craig <mic@graphics.csail.mit.edu>]

doesn't java let you override the default serialize() method?

On Wed, 21 Jan 2004, Patrick Nichols wrote:

> All --
>
> Hit some serious issues today actually displaying the entire basemap +
> route maps, mostly derived from Java serialization issues. I've attached
> an image of the basemap loaded and displayed in a java applet after being
> recursively obtained over RMI - basic b&w for now, will look pretty soon
> (I promise). This at least shows you what the contours look like.
>
> Java RMI note: it turns out that when Java serializes objects, every
> non-transient field of the serialized object is *also* serialized. If a
> Space is serialized, and it has a set of Portals ... which each have a
> pair of Spaces ... which each have a set of Portals ... well, serializing
> a single object requires that the entire graph state be serialized, which
> is bad. This didn't show up for a single loaded building, or even a large
> number of unconnected buildings (remember - the entire connected graph
> only gets serialized, not the entire thing). Java has a hard cap of 15MB
> of serializable state over RMI, causing horrible EOF errors if you try to
> send a huge object over RMI.
>
> Lesson learned: use the transient keyword early and often when writing
> Java RMI code.
>
> --
> * * *
>
> Patrick James Nichols II
> Graduate Student, MIT Computer Graphics Group
> http://graphics.csail.mit.edu/~pnichols
>