Yes thats it - perhaps the word stream is not the most appropriate.
If i read a book which is say horror - in your app that can auto subscribe me
to
books that are of the horror type. which again is just following a book type.
But the streams and subscribers principle works for lots of solutions. email or
chat, and activity logs. comments. just use your imagination.
Assuming that perhaps your plan is the have activities and share them with
followers - which might just be what books they are reading all you do is send
a
message to a stream.
"hello world" to " user/martin/stream/public_activities - if public facing
users
are subscribed they will get the message. Or "Hello World" mail/martin/inbox".
Of course in a real world mail system you would put a copy in the senders sent
and a copy in the recipients inbox - but thats easy.
[mail/steven/sent,mail/martin/inbox]
# just a simple message class with subscribers - this can be far more
imaginative
class message(db.Model):
sender = db.StringProperty()
body = db.TextProperty()
class message_index(db.Model):
receivers = db.StringListProperty() #streams
def put(stream): #puts a stream list in a message receivers list
#should start a worker to append the past list
return
def move(from_stream,to_stream): #replaces a stream with a new stream
inbox----.spam
#should start a worker
return
def delete_stream(stream): #removes a stream - this is useful for
unsubscribe
#should start a worker
return
As simple as this approach is it just about covers - activity walls,
email,comments and so on - one concept is lets say I want to flash messages to
my users "your are now following martin". I just have my Ajax or static page
"listen" to 'user/martin/flash' and send info messages to 'user/martin/flash'
so
when someone unsubscribes, a message is flashed to inform them the request was
completed. Of course you would need to add some security measures to the
stream
class and a mechanism to remove messages - i.e spam folders would clear say
every 7 days, flashed messages once read clear instantly, in-box messages may
live forever. Of if you want to save memory and have millions of users have a
"mail/martin/saved" stream and then add a save message button to emails (all
that does is use the message.move(...) method and then set in-box to keep
messages for say 90 days and the save box to be 'permanent' As you can see the
stream method now has some very useful functionality from just a small amount
of
api.
Well that's how i am thinking, maybe this can work for you.
Regards
Martin Webb
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________________________________
From: stefoid <stevenmath...@yahoo.com>
To: Google App Engine <google-appengine@googlegroups.com>
Sent: Thu, 8 July, 2010 7:07:19
Subject: [google-appengine] Re: list-property, many to many, 5000
indexes...HELP!
oh, wait. If I replace your word 'stream' with 'follower' like a
twitter follower, then I think it immediately makes a lot more sense.
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