The OSGi platform defines a LogService which allows messages to be logged to a central collector. In the E4 platform, an instance of LogService is available as part of the platform, routing error messages through to the console.
Open the
Helloclass and add aprivatefieldLogService logService.Add an
@Injectannotation to theLogServicefield.In the
createmethod, add a call to the log service.The
Helloclass will look like:import javax.inject.Inject; import org.osgi.service.log.LogService; public class Hello { @Inject private LogService logService; @PostConstruct public void create(Composite parent) { label = new Label(parent, SWT.NONE); label.setText("Hello"); logService.log(LogService.LOG_ERROR, "Hello"); } ... }Run the application, and a log message will be printed out to the console of the host Eclipse:
!ENTRY org.eclipse.e4.ui.workbench 4 0 2016-06-02 13:36:42.381 !MESSAGE Hello