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Game Development / Networking & Multiplayer / NIO write taking up all the process resources

on: 2006-05-14 09:24:13

How should the writing to a non-blocking nio channel be handled?

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if (key.isAcceptable()) {
~ codes ~
client.register(selector, SelectionKey.OP_READ |  SelectionKey.OP_WRITE);
}  else if (key.isConnectable()) {
~ codes ~
client.register(selector, SelectionKey.OP_READ |  SelectionKey.OP_WRITE);
} else if (key.isReadable()) {
~ codes ~
} else if (key.isWritable()) {
~ codes ~
<== writes data to the channel here ==>
}

Apperently if I use that the select will keep returning, therefore eating up the resources.
According to this page http://www-128.ibm.com/developerworks/java/library/j-perf03174.html,

Quote

if the socket is registered with the Selector in WRITE mode, then the Selector.select() call will always return immediately, because it has at least one socket which is ready to be written to.

Now my problem, since calling register() function in a thread other than the one that calls select() will cause blocking problem. How would I write data to the channel if I can't register the channel to write state?

2	Java Game APIs & Engines / Java 2D / Re: Drawing outside of the viewable area..	on: 2006-02-07 23:05:19
Hum.. Thanks for the tip but that's not exactly what I want. Because all the stuff in the drawing would have different coordinations and I only want to display a perticular view. Also there are many objects so I don't want to translate all their coordinates first before drawing it.

3	Java Game APIs & Engines / Java 2D / Drawing outside of the viewable area..	on: 2006-02-07 22:29:43
Hi I'm trying to draw something out of viewing area, but somehow things outside of Canvas bound will not be drawed. Is there anyway I can still draw those? I need to copy the image there and be able to move it around... Any ideas? Ex: Graphics2D g = (Graphics2D) strategy.getDrawGraphics(); g.setColor(Color.BLACK); g.fillRect(-800, -600, 800, 600); --- other drawings g.copyArea(-800, -600, 800, 600, 800, 600);

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