Visitor Trace

Some traces and logs may have Periodic Message Blocks (Volume 7, page 300) with very similar message structure and content (mostly Message Invariants, Volume 6, page 251). The only significant difference between them is some unique data. We call such pattern Visitor Trace by analogy with Visitor design pattern27 where tracing code “visits” each object data or data part to log its content or status.

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27 http://en.wikipedia.org/wiki/Visitor_pattern

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