if skywalking supports analysis or statistics via a parameter in the http url as an endpoint.

[lijiawen]

Good Afternoon, I would like to ask if skywalking supports analysis or statistics via a parameter in the http url as an endpoint.

Our usage scenario is like this,
we only provide one url path to our users, all user requests are like this: https://ourdomain.com/gateway?params=values&method=aaa, the specific business forwarding rules depend on one of the method request parameters,
we want to monitor the average response time of different method, timeout and so on through skywalking, please ask if it can be achieved through agent.config configuration file (or can be modified through the source code to achieve similar functions), thanks.

[wu-sheng]

If you are using different Spring methods then yes. Otherwise, I think we don't have out-of-box option. But this is not hard to add.

[lijiawen]

i found this doc from google: https://blog.csdn.net/a17816876003/article/details/113702511 , maybe i can work in this way?

[wu-sheng]

Take a look at official documents, I don't comment on others' blogs, that is unfair.

[lijiawen]

OK, understand.

1. I would like to ask, where is the json configuration mentioned in the documentation placed, is it in a custom plugin? Do I need to understand the implementation principle of skywalking-java-agent first? I downloaded the corresponding source code skywalking-java-agent and saw that there are some scenarios files with {"logic-span":true} configuration, but these seem to be some test cases, and I didn't find out how to actually use this configuration through the source code, where should I put them? If this option needs to understand the source code implementation principle first, and at the same time need to implement custom inserts, I think the second option may be used.

2. Option 2, introduce maven dependency apm-toolkit-trace in the project, and then configure Skywalking's Trace annotation in the corresponding business method, so that you can do it without doing anything else, and at the same time you can check these endpoints in the UI of skywalking.

thanks.

[wu-sheng]

where is the json configuration mentioned in the documentation placed, is it in a custom plugin?

It is a tag, you could use it any way you like to add one. You don't need to know how other plugins work. You add a tag to your span or current span in the context with the proper name, then the backend will identify this automatically. Writing a new plugin is an option for sure, if you don't want to add any lib or API in your codes.

Option-2 works too.

[lijiawen]

Okay, I'll give it a try, thanks for clearing up the confusion.

[lijiawen]

[lijiawen]

@wu-sheng , sorry to interruption again, after adding Trace annotation, I can see the operationName set in Trace is OK, and there are 2 questions, 1. how to support querying custom endpoint(in example is place_orderSTANDARD) at the first red box in the above img, 2. how to set the type and component of custom trace, now the default is unknown,unknown. thanks.

[wu-sheng]

You already have an endpoint name for the search, so, I assume this would not work, unless you use another tag, and set it as a searchable tag(backend configuration).

The logic endpoint is for statistics, on the dashboard, not for trace queries.

Type and component are not available for logic endpoint, as it is not an RPC component at all.

[lijiawen]

Ok, got it, maybe I should implement a custom plugin.

[lijiawen]

[ERROR] /Users/tiger/Work/Project/Tiger/Github/skywalking-java/apm-protocol/apm-network/src/main/java/org/apache/skywalking/apm/network/trace/component/command/TraceIgnoreCommand.java:[21,51] 程序包org.apacskywalking.apm.network.common.v3不存在

@wu-sheng , There is a compile error when compiling skywalking-java-agent for 8.2.0 and 8.10.0-SNAPSHOT versions, how can I fix it?

[lujiajing1126]

Good advice, thanks. i follow this doc: https://github.com/apache/skywalking/blob/master/docs/en/guides/How-to-build.md download source code from release version 8.2.0 execute: ./mvnw clean package -Dmaven.test.skip

You just missed the step before ./mvnw clean package -Dmaven.test.skip. Please follow the guidance step by step.

[lijiawen]

@lujiajing1126 , ok, within the lastest version , it seems OK, but if i download history release version from official git repository(zip files format), there will be probliems. thanks any way.

[wu-sheng]

from official git repository(zip files format)

Never do this. We never recommend you to do so. We say git clone, that has a reason.

[wu-sheng]

If you want to download a source tar bar, download from our website. These two are all listed on the doc.

Remember, docs are there for a reason.

[wu-sheng]

maybe this is the reason, hope to update doc: If you download in zip ,all proto files do not exist ,you should download proto files again and put them into /apm-protocol/apm-network/src/main/proto

Update what? https://skywalking.apache.org/docs/main/v9.0.0/en/guides/how-to-build/ The doc never says so.

[lijiawen]

[lijiawen]

@lujiajing1126 , everything seems OK except this stage.

[lujiajing1126]

The problem here is exactly the same as the last one, submodules are not ready.
As @wu-sheng commented, you must not download a tarball from GitHub for legacy versions.

Please follow the How-To-Build document: use git clone and then git checkout the version you want.

[lijiawen]

@lujiajing1126 , but this version is download from latest github repository

[lijiawen]

@wu-sheng , @lujiajing1126 , Downloading historical versions has this requirement, and needs to match the version of skywalking deployed on our server to prevent compatibility issues.

[lijiawen]

where can i found v8.2.0 from apache, this is another question?

[lijiawen]

OK, i will try it, writing pulgin in lastest version agent, thanks so much.

[wu-sheng]

where can i found v8.2.0 from apache, this is another question?

All versions are available here https://archive.apache.org/dist/skywalking/. But no mirror for versions not listed. So, you need to download from ASF US server, but you should be good.

[lijiawen]

@wu-sheng , logic endpoint feature added from v8.9 , does it mean we should upgrade our OAP server version to v.8.9(now is v8.2), Otherwise it will not be compatible.

[wu-sheng]

I am not sure about 8.2, but it was not added in 8.9.

It is at least existing in 8.4.0. You should use the version switch and search feature of the doc. The docs are changed from version to version.
https://skywalking.apache.org/docs/main/v8.4.0/en/setup/service-agent/java-agent/readme/#the-logic-endpoint

[lijiawen]

I don't know what kind of display effect is on the UI of skywalking after adding logic-span, I don't know if there is a sample picture, if it meets our requirements, We will push forward the upgrade of our OAP server, thanks!

maybe like this ,will a new block be added to show the performance metrics of the logic-endpoint separately in dashboard?

[wu-sheng]

Logic endpoint would be shown as an endpoint on the top selector.

[lijiawen]

After I added the login-span tag, I can't seem to find the corresponding trace name in the UI, both dashboard and tracing.

[lijiawen]

[wu-sheng]

I think I made a very clear statement, the logic endpoint is for statistics, not for trace queries. Maybe you missed that reply.

[lijiawen]

@wu-sheng ，If we want to monitor some metrics of apache-httpclient connection pool, is it possible to do it by skywalking, does this have anything to do with Metrics Exporter?

[wu-sheng]

You need to write a plugin like other pool monitoring.