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9.6 Tracing JavaScript
9.6.1 Server-Side JavaScript Tracing
The SAP HANA XS server-side JavaScript API provides tracing functions that enable your application to write
predefined messages in the form of application-specific trace output in the xsengine trace files (xsengine*.trc)
according to the trace level you specify, for example, “info”(information) or “error”.
If you use the server-side JavaScript API to enable your application to write trace output, you can choose from the
following trace levels:
● debug
● info
● warning
● error
● fatal
For example, to enable debug-level tracing for your JavaScript application:
$.trace.debug("request path: " + $.request.path);
Note: You can view the xsengine*.trace files in the Diagnosis Files tab page in the Administration
perspective of the SAP HANA studio.
9.6.2 Tracing Server-Side JavaScript Applications
The server-side JavaScript API for SAP HANA XS enables you to activate the writing of trace messages into an
application-specific trace file; the following trace levels are available: debug, error, fatal, info, and warning.
By default, applications write messages of severity level error to the xsengine*.trc trace files; you can increase
the trace level manually, for example, to fatal. In SAP HANA XS, the following steps are required to enable trace
output for your server-side JavaScript application:
1. Open the SAP HANA studio.
2. In the Navigator view, double-click the SAP HANA instance to open the Administration view for the repository
where your server-side JavaScript source files are located.
3. Choose the Trace Configuration view.
4. In the Global Database Trace screen area, choose Edit Configuration.
The Edit Configuration icon is only visible if you have the required privileges on the selected SAP HANA
system.
5. Select the Show All Components checkbox.
6. Enter the partial or full name of your application into the search box.
7. Expand the GLOBAL node, if necessary, to view registered traces for the application name returned by the
search operation.
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SAP HANA Developer Guide
Writing Server-Side JavaScript Applications