[Google Wave APIs] Re: Wavelet.getRootBlip() -- Do I understand something wrong?
Oh I see...So robot doesn't get the whole wavelet with all of the blips, but
the blip of the related event and it's parent.
Ok, but if I would like to access to the rootblip, and I get its id with
wavelet.getRootBlipId(), how can I request its content
(getDoucment().getText())? (wavelet.getRootBlip().getDocument().getText()
also throws null exception in these cases, so I don't have any idea how to
achieve this)
Thanks for your guidance!
On Fri, Oct 23, 2009 at 2:56 AM, Austin Chau (Google employee)
api.aus...@google.com wrote:
Hi,
To get the root blip id in your scenario -
wave.appendBlip().getDocument().append(wavelet.getRootBlipId());
This would work because it does not require context of a grandparent
blip. The reason that you are getting exception is because the context
associated with an event callback only goes back its immediate parent. So
in your case if the triggering event is resulted from a grandchild blip away
from root, it will no longer has context to recreate the root blip when you
invoked wavelet.getRootBlip() - thus you will get a null reference.
Hope it helps,
Austin
2009/10/22 Bálint Kriván bal...@google.com
Reply to myself and others: I think this is related to
http://code.google.com/p/google-wave-resources/issues/detail?id=200 .
2009/10/22 Bálint Kriván bal...@krivan.info
Hi!
I have this little chunk of code:
public void debug(RobotMessageBundle bundle, String msg)
{
ListString list = new ArrayList();
list.add(myaddress in google wave);
Wavelet wave = bundle.createWavelet(list);
wave.appendBlip().getDocument().append(msg);
}
@Override
public void processEvents(RobotMessageBundle robotMessageBundle) {
Wavelet wavelet = robotMessageBundle.getWavelet();
for (Event event : robotMessageBundle.getEvents()) {
Blip currentBlip = event.getBlip();
switch (event.getType()) {
case BLIP_SUBMITTED:
debug(robotMessageBundle,
String.valueOf(wavelet.getRootBlip().getBlipId())); // line 46!
}
}
}
So when I add a blip to the wavelet where the robot is, it should open a
new wave with me and send the id of the root blip (The top blip in the
wavelet).
But if this blip isn't right after the root blip (so the very first Reply
button) then I've got a NullPointerException:
java.lang.NullPointerException
at com.google.wave.api.impl.BlipImpl.getBlipId(BlipImpl.java:56)
at robot.MainServlet.processEvents(MainServlet.java:46)
at
com.google.wave.api.AbstractRobotServlet.doPost(AbstractRobotServlet.java:89)
[...]
What is the recommended way to access the very first blip (which is I
guess the RootBlip)?
Thanks for your help!
--
Üdv,
Kriván Bálint
--
Üdv,
Kriván Bálint
--
Üdv,
Kriván Bálint
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Wave API group.
To post to this group, send email to google-wave-api@googlegroups.com
To unsubscribe from this group, send email to
google-wave-api+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/google-wave-api?hl=en
-~--~~~~--~~--~--~---
[Google Wave APIs] Re: Wavelet.getRootBlip() -- Do I understand something wrong?
Keeping track of the IDs for lookup? I have been searching for a
method in the API which takes a blip ID as an argument and returns the
blip matching that ID but have been unable to find one. Am I missing
something? Please tell me how this can be done if possible because my
development has been stalled as a result.
Smola
On Oct 23, 2:55 am, Austin Chau (Google employee)
api.aus...@google.com wrote:
So yes, when a blip is out of context you would have no way to retrieve its
document content from the event callback alone. What can you do now is
maintain the context on your own with a datastore backend. Essentially
keeping track of all wavelet and blip ids for lookup.
We know that this is not ideal and we are working on this as speak to remove
the limited context on callback. Stay tuned for updates.
Austin
2009/10/22 Bálint Kriván bal...@google.com
Oh I see...So robot doesn't get the whole wavelet with all of the blips,
but the blip of the related event and it's parent.
Ok, but if I would like to access to the rootblip, and I get its id with
wavelet.getRootBlipId(), how can I request its content
(getDoucment().getText())? (wavelet.getRootBlip().getDocument().getText()
also throws null exception in these cases, so I don't have any idea how to
achieve this)
Thanks for your guidance!
On Fri, Oct 23, 2009 at 2:56 AM, Austin Chau (Google employee)
api.aus...@google.com wrote:
Hi,
To get the root blip id in your scenario -
wave.appendBlip().getDocument().append(wavelet.getRootBlipId());
This would work because it does not require context of a grandparent
blip. The reason that you are getting exception is because the context
associated with an event callback only goes back its immediate parent. So
in your case if the triggering event is resulted from a grandchild blip
away
from root, it will no longer has context to recreate the root blip when you
invoked wavelet.getRootBlip() - thus you will get a null reference.
Hope it helps,
Austin
2009/10/22 Bálint Kriván bal...@google.com
Reply to myself and others: I think this is related to
http://code.google.com/p/google-wave-resources/issues/detail?id=200.
2009/10/22 Bálint Kriván bal...@krivan.info
Hi!
I have this little chunk of code:
public void debug(RobotMessageBundle bundle, String msg)
{
ListString list = new ArrayList();
list.add(myaddress in google wave);
Wavelet wave = bundle.createWavelet(list);
wave.appendBlip().getDocument().append(msg);
}
@Override
public void processEvents(RobotMessageBundle robotMessageBundle) {
Wavelet wavelet = robotMessageBundle.getWavelet();
for (Event event : robotMessageBundle.getEvents()) {
Blip currentBlip = event.getBlip();
switch (event.getType()) {
case BLIP_SUBMITTED:
debug(robotMessageBundle,
String.valueOf(wavelet.getRootBlip().getBlipId())); // line 46!
}
}
}
So when I add a blip to the wavelet where the robot is, it should open a
new wave with me and send the id of the root blip (The top blip in the
wavelet).
But if this blip isn't right after the root blip (so the very first
Reply button) then I've got a NullPointerException:
java.lang.NullPointerException
at com.google.wave.api.impl.BlipImpl.getBlipId(BlipImpl.java:56)
at robot.MainServlet.processEvents(MainServlet.java:46)
at
com.google.wave.api.AbstractRobotServlet.doPost(AbstractRobotServlet.java:8
9)
[...]
What is the recommended way to access the very first blip (which is I
guess the RootBlip)?
Thanks for your help!
--
Üdv,
Kriván Bálint
--
Üdv,
Kriván Bálint
--
Üdv,
Kriván Bálint
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Wave API group.
To post to this group, send email to google-wave-api@googlegroups.com
To unsubscribe from this group, send email to
google-wave-api+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/google-wave-api?hl=en
-~--~~~~--~~--~--~---
[Google Wave APIs] Re: Wavelet.getRootBlip() -- Do I understand something wrong?
Basically you need a permanent storage that you manage on your own (not
provided by the API) to maintain the context data for each blip. That's
what I meant by your own datastore to keep track of the blip ids and
associated data. Take a look at the sample robot Stocky which has a
persistence layer to remember blips data with JDO on AppeEngine -
http://google-wave-resources.googlecode.com/svn/trunk/samples/extensions/robots/java/stocky/src/robot/
http://google-wave-resources.googlecode.com/svn/trunk/samples/extensions/robots/java/stocky/src/robot/
Austin
On Fri, Oct 23, 2009 at 6:22 PM, Smola callmesm...@gmail.com wrote:
Keeping track of the IDs for lookup? I have been searching for a
method in the API which takes a blip ID as an argument and returns the
blip matching that ID but have been unable to find one. Am I missing
something? Please tell me how this can be done if possible because my
development has been stalled as a result.
Smola
On Oct 23, 2:55 am, Austin Chau (Google employee)
api.aus...@google.com wrote:
So yes, when a blip is out of context you would have no way to retrieve
its
document content from the event callback alone. What can you do now is
maintain the context on your own with a datastore backend. Essentially
keeping track of all wavelet and blip ids for lookup.
We know that this is not ideal and we are working on this as speak to
remove
the limited context on callback. Stay tuned for updates.
Austin
2009/10/22 Bálint Kriván bal...@google.com
Oh I see...So robot doesn't get the whole wavelet with all of the
blips,
but the blip of the related event and it's parent.
Ok, but if I would like to access to the rootblip, and I get its id
with
wavelet.getRootBlipId(), how can I request its content
(getDoucment().getText())?
(wavelet.getRootBlip().getDocument().getText()
also throws null exception in these cases, so I don't have any idea how
to
achieve this)
Thanks for your guidance!
On Fri, Oct 23, 2009 at 2:56 AM, Austin Chau (Google employee)
api.aus...@google.com wrote:
Hi,
To get the root blip id in your scenario -
wave.appendBlip().getDocument().append(wavelet.getRootBlipId());
This would work because it does not require context of a grandparent
blip. The reason that you are getting exception is because the
context
associated with an event callback only goes back its immediate parent.
So
in your case if the triggering event is resulted from a grandchild
blip away
from root, it will no longer has context to recreate the root blip
when you
invoked wavelet.getRootBlip() - thus you will get a null reference.
Hope it helps,
Austin
2009/10/22 Bálint Kriván bal...@google.com
Reply to myself and others: I think this is related to
http://code.google.com/p/google-wave-resources/issues/detail?id=200.
2009/10/22 Bálint Kriván bal...@krivan.info
Hi!
I have this little chunk of code:
public void debug(RobotMessageBundle bundle, String msg)
{
ListString list = new ArrayList();
list.add(myaddress in google wave);
Wavelet wave = bundle.createWavelet(list);
wave.appendBlip().getDocument().append(msg);
}
@Override
public void processEvents(RobotMessageBundle robotMessageBundle) {
Wavelet wavelet = robotMessageBundle.getWavelet();
for (Event event : robotMessageBundle.getEvents()) {
Blip currentBlip = event.getBlip();
switch (event.getType()) {
case BLIP_SUBMITTED:
debug(robotMessageBundle,
String.valueOf(wavelet.getRootBlip().getBlipId())); // line 46!
}
}
}
So when I add a blip to the wavelet where the robot is, it should
open a
new wave with me and send the id of the root blip (The top blip in
the
wavelet).
But if this blip isn't right after the root blip (so the very first
Reply button) then I've got a NullPointerException:
java.lang.NullPointerException
at com.google.wave.api.impl.BlipImpl.getBlipId(BlipImpl.java:56)
at robot.MainServlet.processEvents(MainServlet.java:46)
at
com.google.wave.api.AbstractRobotServlet.doPost(AbstractRobotServlet.java:8
9)
[...]
What is the recommended way to access the very first blip (which is
I
guess the RootBlip)?
Thanks for your help!
--
Üdv,
Kriván Bálint
--
Üdv,
Kriván Bálint
--
Üdv,
Kriván Bálint
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Wave API group.
To post to this group, send email to google-wave-api@googlegroups.com
To unsubscribe from this group, send email to
google-wave-api+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/google-wave-api?hl=en
-~--~~~~--~~--~--~---
[Google Wave APIs] Re: Wavelet.getRootBlip() -- Do I understand something wrong?
Reply to myself and others: I think this is related to
http://code.google.com/p/google-wave-resources/issues/detail?id=200 .
2009/10/22 Bálint Kriván bal...@krivan.info
Hi!
I have this little chunk of code:
public void debug(RobotMessageBundle bundle, String msg)
{
ListString list = new ArrayList();
list.add(myaddress in google wave);
Wavelet wave = bundle.createWavelet(list);
wave.appendBlip().getDocument().append(msg);
}
@Override
public void processEvents(RobotMessageBundle robotMessageBundle) {
Wavelet wavelet = robotMessageBundle.getWavelet();
for (Event event : robotMessageBundle.getEvents()) {
Blip currentBlip = event.getBlip();
switch (event.getType()) {
case BLIP_SUBMITTED:
debug(robotMessageBundle,
String.valueOf(wavelet.getRootBlip().getBlipId())); // line 46!
}
}
}
So when I add a blip to the wavelet where the robot is, it should open a
new wave with me and send the id of the root blip (The top blip in the
wavelet).
But if this blip isn't right after the root blip (so the very first Reply
button) then I've got a NullPointerException:
java.lang.NullPointerException
at com.google.wave.api.impl.BlipImpl.getBlipId(BlipImpl.java:56)
at robot.MainServlet.processEvents(MainServlet.java:46)
at
com.google.wave.api.AbstractRobotServlet.doPost(AbstractRobotServlet.java:89)
[...]
What is the recommended way to access the very first blip (which is I guess
the RootBlip)?
Thanks for your help!
--
Üdv,
Kriván Bálint
--
Üdv,
Kriván Bálint
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Google Wave API group.
To post to this group, send email to google-wave-api@googlegroups.com
To unsubscribe from this group, send email to
google-wave-api+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/google-wave-api?hl=en
-~--~~~~--~~--~--~---
