R Services Internal Communication Mechanisms

Niels Berglund continues his R Services internals series:

When browsing for the symbols, you can use this command: x /1 *!TCP*. By using the option /1 you’ll only see the names, and no addresses. On my machine that gives me quite a lot, but there are two entries that catch my eye: sqllang!Tcp::AcceptConnection and sqllang!Tcp::Close. So let us set breakpoints at those two symbols, and see what happens when we execute our code.

The result when executing the code is that we initially break at sqllang!Tcp::AcceptConnection. Followed somewhat later by breaking at sqllang!Tcp::Close. Cool, this seems to work – let us set some more breakpoints and try to figure out the flow of events.

The first half recapitulates his previous findings, and then he incorporates new information in the second half.

Related Posts

Interactive ggplot Plots with plotly

Laura Ellis takes us through ggplotly: As someone very interested in storytelling, ggplot2 is easily my data visualization tool of choice. It is like the Swiss army knife for data visualization. One of my favorite features is the ability to pack a graph chock-full of dimensions. This ability is incredibly handy during the data exploration […]

Read More

Goodbye, gather and spread; Hello pivot_long and pivot_wide

John Mount covers a change in tidyr which mimics Mount and Nina Zumel’s pivot_to_rowrecs and unpivot_to_blocks functions in the cdata package: If you want to work in the above way we suggest giving our cdatapackage a try. We named the functions pivot_to_rowrecs and unpivot_to_blocks. The idea was: by emphasizing the record structure one might eventually internalize what the transforms […]

Read More

Categories

August 2017
MTWTFSS
« Jul Sep »
 123456
78910111213
14151617181920
21222324252627
28293031