Sonar User Guide
How it works
Above we see the marker page after clicking on Send Marker; the details of the marker are logged on the page. The marker is easy to spot in a network trace.
Of course, the GET request may be rejected with an error code but that doesn't matter because we have the marker we need. Note how the Info field shows:
- The text that was appended to the marker url; slow_outlook
- The username value; matthew
- Details of the marker number; m=1
- A Universal Unique Identifier (UUID); a599d22a-8733-4cf9-9511-738a18dbdd57
Clicking the Send Marker again send another marker:
We can see that the new marker appears in the log. A quick look at the trace and we see the matching entry:
Note that the identifier data is the same as the earlier marker but this one shows as m=2, matching the marker in the Sonar log.
What if we want to send a marker targeting a server that is not running a web service? We'll see later that Sonar can send markers targeting any service.