Add virtual MQ showcase

[pg-yang]

172.31.0.2:61616 is activemq server

[kezhenxu94]

Hi @pg-yang , can you also share the related traces? And please also update the topology in the doc.

The resource cost looks reasonable to me, it adds <= 0.1C/256M.

[pg-yang]

The traces of MQ are truncated

And I only checked docker deployment as i don't have enough resource to run k8s on my PC .

[wu-sheng]

It seems the producer/consumer continues, is there an async from HTTP request to sending a message?

[pg-yang]

I try to create a controller to send MQ message , but it was truncated too . it seems the reason of gateway plugin .

[wu-sheng]

Oh, Gateway is not a good place to do that. Spring Gateway has a lot of async. I am not sure whether you triggered something. It is better to put this logic in a simple SpringMVC Controller.

[pg-yang]

Yes , I have to create a new service with MQ producer or consumer

[wu-sheng]

Isn't an existing Java application? Besides the gateway? If there is one, we could build a producer and consumer for the same service.

[pg-yang]

Only songs is java application except gateway . If build producer and consumer to songs , the topology would be loop :

%% please read this doc in our official website, otherwise the graph is not correctly rendered.
graph LR;
songs --> acvivemq

acvivemq --> songs 

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[wu-sheng]

I think it is fine to find a loop with mutiple endpoints. After all, we are just showing the capability

[pg-yang]

The doc

%% please read this doc in our official website, otherwise the graph is not correctly rendered.
graph LR;
  loadgen[load generator] --> ui("UI (React)") --> Traffic1("HTTP Request for backend serv") -->  apisix("APISIX as UI container")
 --> app("app server (NodeJS)") --> gateway("gateway (Spring)");
  ui("UI (React)") --> Traffic2("HTTP Request for UI codes") --> apisix("APISIX with  UI container")
  gateway --> songs("songs (Spring)") & rcmd("recommendations (Python)");
  songs --> activeMQ
  activeMQ --> songs
  rcmd --> songs;
  songs --> db("database (H2)");

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[wu-sheng]

@kezhenxu94 PTAL. BTW, could you revert the last change on the demo installer? As apache/skywalking#9954 had been merged, we should test whether it is fixed.