ESP Studio allows you to control a running project by enabling tracing, pausing, resuming, and stepping of data flow through Event Stream Processor streams. You can also create breakpoints and watch variables on a running application.
Breakpoints are locations in stream or window input or outputs that stop the flow of data in the Event Stream Processor model. A watch variable inspects the data.
| Button | Function |
|---|---|
| Trace On | Instructs Event Stream Processor to begin tracing (debugging). This parameter must be set to use the Event Stream Processor breakpoint APIs. |
| Trace Off | Stops tracing (debugging). |
| Step Platform | Steps the running Event Stream Processor. |
| Pause Platform | Pauses the running Event Stream Processor. |
| Enable All Breakpoints | Enables all breakpoints in the list. |
| Disable All Breakpoints | Disables all breakpoints in the list. |
| Insert Breakpoint | Inserts a breakpoint item into the watch table. |
| Insert Watch | Inserts a watch item into the watch table. |
| Print Breakpoint Data to Console | Prints the breakpoint and pause state data for the current Event Stream Processor to the console. |
The following breakpoint commands initiate long-running operations. Each of these can be cancelled before completion by clicking Cancel Current Step.
| Button | Function |
|---|---|
| Step Quiesce from Base | Automatically steps all the derived (non-base) streams until their input queues are empty. |
| Step Quiesce | Automatically steps the stream and all its direct and indirect descendants until all of them are quiesced. |
| Step Transaction | Automatically steps until the end of transaction. |
| Step Quiesce Downstream | Steps the descendants of the stream but not the stream itself. |