[Mod-pubsub-developer] New cvs check-ins: topics-listing app, Apache logfile sensor, throughput perf test tool, bridge.py

[Adam R. <Ad...@Kn...>]

Four new cvs check-ins:

1. kn_apps/topics

   A browser JavaScript app that lists the topics on a PubSub server.
   I updated the kn_apps/index.html to include this new utility.

   See also the command-line utility kn_tools/list_subtopics.plx.

2. kn_sense/apache_logfile.sh

   Fred's Apache logfile sensor, written in the Bourne shell.
   This sensor monitors an Apache log file (common or combined) and
   generates events as log entries are written to it.

   Note that this sensor requires the libkn PubSub C Library
   available in the c_pubsub/libkn directory.

   Also note that since I haven't been able to figure out how to
   get this c_pubsub/libkn library to compile on Linux, I still
   have not gotten this sensor working yet, either.

   But I assure you, it's very fine code.  *wink*

3. kn_tools/perftest_throughput.java

   Adam's command-line utility that does not require any PubSub
   client library to run.  All it needs is a Java runtime.

   Spawns x threads, each of which publish y events,
   and tells you the total elapsed time in ms.

   Slowly but surely we're putting together a useful set of tools.

4. python_pubsub/bridge.py

   Andrew's bridge demonstration.

   We've often needed the capability to "bridge" between pubsub
   servers.  That is, to have two pubsub servers reflect the same
   topics and events on those topics.  Often, we want this to be the
   case for only a subset of the topic space of these two pubsub
   servers.  Often, we want to do transformation on the way.

   You could do this using routes between the pubsub servers -- use
   do_max_age with an inter-pubsub-server route.  Alternatively,
   bridge.py subscribes to various pubsub servers (as configured in
   the variables at the top) and attempts to synchronize topic
   hierarchies and events.

   FIXME: This should be generalized to bridge between URLs -- that
   is, it should work intra-pubsub-server as well as
   inter-pubsub-server.  For example, so that you can mimic the
   subtopic space of /what/nasdaq onto /what/realtime/app.


Also, I just got a bunch of updates to the PubSub C++ Library
for Windows/ActiveX/.NET connectivity.  I need to do some diffs,
After which I'll check them into the cxx_pubsub/ directory.

Enjoy,
  Adam