Setup IntelliJ for development of DSP-API
TODO add "Setup VS Code for development of DSP-API"
Create an IntelliJ Project for DSP-API
TODO
Setup IntelliJ Code Formatter
Use Scalafmt in IntelliJ IDEA to format Scala code.
In IntelliJ editor setting (Preferences -> Editor -> Code Style -> Scala), choose Scalafmt as formatter and check the box for
Reformat on file save as shown below:
Use IntelliJ IDEA's Run/Debugger Configuration with Knora
TODO
Profile Knora Using VisualVM in IntelliJ
First, download and install VisualVM.
Then, in IntelliJ, under Preferences -> Plugins, search for the VisualVM Launcher, click on "Search in repositories", install the plugin, and restart IntelliJ. IntelliJ's toolbar should now contain a button with a green triangle on an orange circle, with the tooltip "Run with VisualVM":
You can use this button to run the class org.knora.webapi.app.Main and
profile it in VisualVM. The first time you do this, IntelliJ will ask
you for the path to the VisualVM executable. On macOS this is
/Applications/VisualVM.app/Contents/MacOS/visualvm.
When VisualVM starts, it will open a window like this:
To use the profiler, click on the "Sampler" tab, then on the "CPU" button:
Now run some DSP-API operations that you're interested in profiling, preferably several times to allow the sampler to collect enough data. Then click on the "Snapshot" button:
In the snapshot, you'll see a list of threads that were profiled:
You can then browse the call tree for each thread, looking for Knora method calls, to see the total time spent in each method:
