I want to save all chat messages in BigBlueButton to database on external server.
I saw that BigBlueButton don't have API for it.
Could I get messages using some method on external server or I must change BBB methods?
Thank you
Late answer but this is how you to do it.
There are multiple ways to this.
Depending on which version you are using.
I am going to assume you are using the latest 0.9 one.
On you external server, you have an application listen to the redis messages sent by the BBB server, and store them to the database.
You would need, of course, to listen to the correct channel.
Look up redis, to see how you can achieve that.
An other way would be to go to the following service ChatService.java, and search for the following function sendPublicMessage.
Inside of it, all the variables and data would have already been extracted. So you can connect to your database from there and add the entry.
There are others ways to this. I personally recommend that you hook your external server to listen to redis, cause it seems to be the simplest and least invasive way to the functionality of BigBlueButton.
BBB do not have API to fetch the chat data, however we can parse and pass the chat message to other server/API.
BBB stores chat data in events.xml file something like this
<event timestamp="1321843915276" module="CHAT" eventname="PublicChatEvent">
<locale>en</locale>
<message></message></message>
<color>0</color>
<sender>c</sender>
</event>
you can write small script to read events.xml after meeting completion and push chat data for respective meeting to your dB or exposed service using curl.
hope this helps.
Related
My Goal:
Then database table was externally changed, I want to send WebSocket notification to clients.
Question:
Is there a "native" Sails.js way to track changes in database table populated via Model?
I only dabble in sails but I'm not aware of a way. You might make a "model-listener" service that utilizes your adapter of choice's socket/channel capabilities. You'll have to start the listeners at some point via a hook or in the bootstrap file.
The problem you're going to run into is determining if the event(create, update, drop/delete) was external or sails. I'm more familiar with PGSQL and know you can provide an application name to your connection and could include it in your publish message so your listener/subscribe handler can ignore non-sails related events.
PGSQL trigger/notify/listen
Event Triggers
Notify
Listen
MongoDB
Capped Collections
Tailable Cursors
Of course waterline supports more adapters than the two I've listed here but I tried to pick the two I assume are the most popular. I know this might be the answer you had hoped for but it might give you some ideas to try.
Sorry, I'm a new poster so I'll try to provide some links in comments if it will stackoverflow will allow me.
I am working on the jabber chatting Applications with the use of XMPP server .
I want to make 2 user friend so I have to add roster with the use of mysql query.
I have make entry in two tables.(1) ofRoster (2)ofRosterGroups.
I make entry in both the table but its not working.
Is there anything where I am missing.
I can do this with the admin panel but i don't want to do that.
I think you are using openfire (those tables in SQL look like the openfire setup). If so, the table you have to edit is "ofGroupUser". To add a user to a group you need to do a sql insert into that table where the group name is the group you want to add the user to, the username is the user you are adding to the group and administrator is the flag of that user's authority (just use 0). An example insert would look like this:
INSERT INTO ofGroupUser VALUES("group name", "user", administrator);
However, as mentioned in the above post this is not a good method for doing this as it will not immediately affect the server. You must restart the server for these changes to take place because openfire (or whatever server you are using) probably only reads the database on start up. Once it caches everything, it will edit the database according to requests (like adding users or groups through the admin console), but will not read from it and your additions will not be seen until a server restart occurs.
Basically, doing manual sql inserts will produce the desired results, and, if you are just testing some functionality, will work just fine as long as you restart the server. If you are using openfire and need to do group administrative work in some way besides the web ui, I would look into using a different server. As far as I know, openfire isn't real great with administration outside of it's web ui. Here is a list of many open source xmpp servers. I'd recommend ejabberd (as mentioned above post) it has a very nice control tool called ejabberdctl with an available expansion module called mod_ctlextra (here is the man page for it which lists commands) that will allow you to do what I assume you are wanting. Then you don't have to worry about sql and restarting, just use their tool which is how it should be.
Also, on a side note, ejabberd is extremely efficient due to the nature of the language used to write it: Erlang. Great stuff.
Hope that helps!
Presumably you are using the odbc modules with ejabberd. The sql schema though defines two tables rostergroups and rosterusers, not the ones you mention in the question. In any case you should not update the tables directly, ejabberd keeps internal state and does not get notified of your changes.
The way to go is by actually having the users send the mutual subscriptions and accept them as per the rfc. Roster Item Exchange might also be useful.
In our iPhone app , we offer email templates populated with DB. also user can create their own templates.
Say for example , i have my own templates created over 500 entries to use
here i need to know the possibility on the below things since my client asks me.
If i want to to send my templates stored into my DB to myfriend who uses the same application.( So my friend does not have to create the templets on his own , he can use mine)
Can that user be able to load those template details ( DB information ) into his app? (like posting the db contents to server and the same content can be loaded into his app using link)
I think it cant be done but i would like to know opinions and views to convey this to my superior.
Thanks a lot
This could help: How do I associate file types with an iPhone application?
Okay, well.. It's possible to do what you are trying to do.
You would need to
Serialize the data that's stored in the DB
Figure out a way to send this data to the server/as an attachment in an email over to your friend.
So from that point of view,
Doing the first is pretty simple. If its all just string content, you can serialize it into an XML/JSON. There are a lot of ways out there that converts objects into strings or bytes to send them over the network anywhere you please.
The second needs support from the server. You would need a server that can identify the applications from one another. ie. yours from that of your friend's. It should then be made to handle the serialized content you are planning to send over and then figure out a way to send it to the friend. maybe a push notification? You could possibly look at Urban Airship or some such offering for doing this incase you dont have an existing server.
Or, you can cut yourself all the work and see if your workflow can fit into this
http://www.raywenderlich.com/1980/how-to-import-and-export-app-data-via-email-in-your-ios-app
I have a question regarding this topic.Like for Client Server Applications
1) is it necessary to load database directly into the Application.
Suppose if I have a DB in the back end and My application has to connect to that DB and display the results on the View for this do I need to Add DB into the Application directly.
2) can we access any DB or a File on the Remote server and show the required results.( with out adding that particular DB or A File into the application directly). How can we do this.
I saw a similar question in stackoverflow one answer was to use a PList, I am new to this.I am browsing the net but not able to get clear results. I lost many of my interviews because of this question.
Thanks,
1) is it necessary to load database
directly into the Application.
Suppose if I have a DB in the back end
and My application has to connect to
that DB and display the results on the
View for this do I need to Add DB into
the Application directly.
I'm not sure I understand this question. No, you don't need to load a database directly into a client in a client-server architecture. Normally, when I think of a design where a server has a database, I imagine there's some kind of way for the client to query the server for information. Perhaps it's making HTTP requests, which the server parses into a query, runs the query, and then returns the results (perhaps in XML form?).
2) can we access any DB or a File on
the Remote server and show the
required results.( with out adding
that particular DB or A File into the
application directly). How can we do
this.
Are you asking if it's possible, in general, to access a server database from a client? Yes, of course. (See above, re: HTTP Requests).
Any arbitrary file? That depends on how the server is set up. Again, HTTP is one protocol works that way; if you send an HTTP query like "GET someimage.png HTTP/1.0", the server could just be grabbing the whole file someimage.png and sending it back in the response. (Technically, it's not necessarily snarfing a whole file -- it could be creating that PNG dynamically since there's nothing in the HTTP protocol that says it must be sending an existing file -- but that's outside the scope of your question.)
I lost many of my interviews because
of this question.
Not to sound too snarky, but interviews are often won and lost not because you don't know the answer, but when you can't communicate effectively. You haven't phrased your question(s) here particularly well.
We are trying to implement a notification module. It allows website internal users to send message to each other. A key feature is that it allows business users to send bulk messages to the users. We are talking about millions of users here.
Currently it is planned to be a publish/subscribe model. Once login, system shall retrieve the relevant messages for the user from a database table. The logic gets more and more complicated when each users are allow to delete and reply to the message he/she received.
Pubsubhub seems to be more server to server. XMPP seems to be too complicated for this scenario.
Anything I miss out? Can I make it simpler? Any existing library to build on? I'm open to any suggestions.
It sounds like a database is actually all you need here. You didn't mention any need for real-time notification. If this is a web application and the user is logging in, a simple relationship between users and messages may be all you need to provide the ability to send any message to one (or millions) of users. Your relationship table can include flags for read and deleted.
One option would be to use something like Joomla.
http://www.joomla.org/
Its open source, and they've solved all the problems you are trying to solve. Alternatively if you have to build it, what language are we talking about here?
Are you seriously saying you have millions of 'internal' employees? Sounds like you might need an email server!
Seriously though, please tell us more..