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The Lounge What is on Your Mind? PubNub Live Chat Beta Testing Post 303034840 by Neo on Wednesday 8th of May 2019 12:51:00 AM
Old 05-08-2019
Update:

UserCP Screeching Frog 0.7603

Still working on tweaking the list of users in live chat.
  • Added new code in update() hook for testing.

Code:
updated() {
    this.updateCount++;        // initially set to zero in data()
    if (this.updateCount % 5 === true || this.updateCount == 2) {
      this.getHereNow();
    }
    //console.log("update count", this.updateCount);
  },

It is interesting to console.log() the updateCount var.

For this page, after the initial page mount, updateCount == 2, so I set the logic to call this.getHereNow(); (again) testing, as it was also called when the page was first mounted (so this is a test, not final answer).

Then I noticed if we receive a new pubnub message the count is incremented by around 5. So for fun, I set this.updateCount % 5 == true but this is really just overkill, because I also call the same method when a message is received. so if I go with this kind of approach, using the view update() lifecycle hook, then I can get rid of the calls to the same method in other parts of the code and control the logic from update().

The problem I am trying to solve is that sometimes when a user enters live chat (that also includes "self"), their occupancy and name (uuid) does not appear correctly above the message window. As soon as a message is processed, all is updated because I call getHereNow() when a message is received.

Of course, if I setpubnub.subscribe() presence TRUE, this problem can be easily solved, but then the API pings the pubnub network every second or so, flooding the network with presence pings from the browser. This is not scaleable.

Hence, the best way forward, in my view, is for PubNub to include a new configuration timer in the pubnub.subscribe() so we can control the frequency of the pubnub presence pings (polling) in the browser.

Or maybe I am just missing some more obvious way in the PubNub SDK to do this more correctly?!
 

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kproplog(1M)						  System Administration Commands					      kproplog(1M)

NAME
kproplog - display the contents of the Kerberos principal update log SYNOPSIS
/usr/sbin/kproplog [-h | -e num] DESCRIPTION
The kproplog displays the contents of the Kerberos principal update log to standard output. This command can be used to keep track of the incremental updates to the principal database, which is enabled by default. The /var/krb5/principal.ulog file contains the update log main- tained by the kadmind(1M) process on the master KDC server and the kpropd(1M) process on the slave KDC servers. When updates occur, they are logged to this file. Subsequently any KDC slave configured for incremental updates will request the current data from the master KDC and update their principal.ulog file with any updates returned. The kproplog command can only be run on a KDC server by someone with privileges comparable to the superuser. It will display update entries for that server only. If no options are specified, the summary of the update log is displayed. If invoked on the master, all of the update entries are also dis- played. When invoked on a slave KDC server, only a summary of the updates are displayed, which includes the serial number of the last update received and the associated time stamp of the last update. OPTIONS
The following options are supported: -h Display a summary of the update log. This information includes the database version number, state of the database, the number of updates in the log, the time stamp of the first and last update, and the version number of the first and last update entry. -e num Display the last num update entries in the log. This is useful when debugging synchronization between KDC servers. -v Display individual attributes per update. An example of the output generated for one entry: Update Entry Update serial # : 4 Update operation : Add Update principal : test@EXAMPLE.COM Update size : 424 Update committed : True Update time stamp : Fri Feb 20 23:37:42 2004 Attributes changed : 6 Principal Key data Password last changed Modifying principal Modification time TL data FILES
/var/krb5/principal.ulog The update log file for incremental propagation. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWkdcu | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
kpasswd(1), gkadmin(1M), kadmin(1M), kadmind(1M), kdb5_util(1M), kprop(1M), kpropd(1M), kadm5.acl(4), kdc.conf(4), attributes(5), SEAM(5) SunOS 5.10 29 Mar 2004 kproplog(1M)
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