messaging - Can I use MQTT for my use case? -

-

so, have bunch of mobile devices (millions) , have backend system. needs/use case are:- 1. collect data devices , send backend. 2. send push messages backend system individual or groups of devices.

so, given scenario, make sense use mqtt communication between backend , devices? 1 of confusions, have in use case #1, devices publishers , system in backend subscribers, whereas use case #2, devices subscribers push messages , backend system publisher. possible? or thinking wrong way?

having worked on number of examples (e.g. mobile telemetry system push notification) fit usage pattern can mqtt can fit perfectly. mqtt client can act both publisher , consumer, there no distinction.

you need design topic structure suit data sending in either direction, should not difficult.


Comments

Post a Comment

Popular posts from this blog

Detect support for Shoutcast ICY MP3 without navigator.userAgent in Firefox? -

-
the current version of mozilla firefox 23.0.1, version not support play mp3 shoutcast streams tcp port different 80 (most common 8000 shoutcast 1.9.8). i use flash when mp3 support not available in html5 audio, way detect is: try{ var = document.createelement('audio'); r = !!(a.canplaytype && !!a.canplaytype("audio/mpeg; codecs=mp3").replace(/^no$/,'')) }catch(e){ r = false; } the support mp3 shoutcast streams in firefox added in version 24 . a.canplaytype("audio/mpeg; codecs=mp3") = in chrome , firefox, chrome support, firefox not support, due current code detect not work firefox. the current version of jquery support ie 6 1.10.2, version not has .browser i think "stylized" way testing features , not querying browsers / versions, notwithstanding here see hard not violate "principle". what "stylized" way of detect mp3 icy support without navigator.useragent in firefox? ther...
Read more

web - SVG not rendering properly in Firefox -

-
i have problem svg renderring in firefox. whilst works in safari, chrome or in ie, doesn't work in firefox. inspecting element seems layers there, background visible if it's z-index higher z-index of others. rendered in firefox: svg logo in firefox link original source file: svg file thanks help. ps: used sketch 3 export svg. if helps somehow. you're experiencing bug 995813 . i fixed bug time ago change still making way through release process example display correctly firefox 31 onwards released on 22 july 2014. in meantime if move fill="white" <mask> element child <use> element work around firefox bug.
Read more

java - JavaFX 2 slider labelFormatter not being used -

-
i have following code not label slider "foo50", etc... 1 expect setlabelformatter call, instead seems have no effect (the slider labelled 50, 100, etc , println's dont run). there missing? not implemented in default 2.2 skin? using oracle java 7 package javafxbugtest; import javafx.application.application; import javafx.scene.*; import javafx.scene.control.*; import javafx.stage.*; import javafx.util.stringconverter; public class javafxbugtest extends application { @override public void start(final stage primarystage) { slider cp = new slider(); cp.setlabelformatter(new stringconverter<double>() { @override public string tostring(double t) { system.out.println("nope?"); return "foo" + t.tostring(); } @override public double fromstring(string string) { system.out.println("he...
Read more