March 2010
Intermediate to advanced
304 pages
8h 23m
English
Content preview from Google Wave: Up and RunningBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Context
The context attribute is an optional
attribute that can be included in event handlers to access various levels
of blips associated with the event blip itself. Think of
context as a blip-level configuration that allows you
to limit or expand the objects sent with the event.
To specify context, you add one or more context
attributes as parameters to the register_handler event. For example, the
following code will include sibling and parent blips (as well as the event
blip) when the ParticipantsAdded event is triggered:
myrobot.register_handler(events.ParticipantsAdded, context = event.Context.SIBLING + event.Context.PARENT)
Currently five case-insensitive context attributes are available:
PARENTSend the parent of the event blip out.
SIBLINGSSend the siblings (i.e., blips at the same level in the reply hierarchy as the event blip).
CHILDRENSend the children of the blip out.
SELFSend the blip itself.
SELFis always sent out. However, if nothing is specified in the context tag, the default ofPARENT+CHILDREN+SIBLINGS+SELFis sent out.SELFcan be used to send only the event blip.ALLDo a recursive complete scan, and send out all blips in the wavelet (but not the blips of any private replies—these reside in different wavelets).
You can use context to limit the amount of objects passed to your robot with an event, thereby reducing the load on your robot, or you can ask for all the blips if you want to get the full context of a wavelet.[41]
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.