Download Implementing a trace component for Carbide development

17
binary file. The DataReader reads the binary file and pushes traces to the
Engine one by one. The Engine will then iterate the trace through the list of
DataProcessors. Here the order of DataProcessors is Decoder, TriggerProcessor,
FilterProcessor, Logger, LineCountProcessor, VariableTracingProcessor,
ColorProcessor and finally the TraceViewerView. The order can be easily
modified just by inserting the DataProcessors in a different order. Also, the
same DataProcessor can be inserted multiple times. For example Filter might be
used before Decoder to filter traces still in binary format and then again after
Decoder to filter using decoded trace. Note that not all DataProcessors are
visible in Figure 3 and some of the names are abbreviated. All DataProcessors
can be found in subsection 5.2.2 on page 20.
Figure 3. Data flow diagram of TraceViewer
5.2. Class design
5.2.1. TraceViewer Engine
The TraceViewer Engine package contains the central logic of TraceViewer. The
Engine receives the traces from the trace source, writes them to a file, reads the
same file, processes traces and finally shows them in the view. Figure 4
introduces the main classes of the TraceViewer Engine. Figure 4 is divided into
two parts, the Core part and the OST part. The Core part implements common
functionality for the application containing mostly interfaces that have to be