ChannelFinder Client

Kunal Shroff

EPICS Spring Collaboration Meeting, October 2010

BNL

ChannelFinder:

A Directory Service Generic

• No dependency on installation and local conventions

Simple and Fast• Use standards wherever possible

Provides “query-by-functionality”

ChannelFinder

REST style web service• URI specifies the data element to operate on• HTTP method specifies the operation• Payload (XML, JSON) contains object representation

RDB• Contains directory data

Use LDAP to query user-group relations

ChannelFinderAPI

http://channelfinder.sourceforge.net/ Pure Java API library

• Query• Add/Remove channels, Properties, Tags• Set/Update channels, Properties, Tags

RESTful web service client - Jersey Test Driven Development

• Junit • corbertura

ChannelFinderAPI

Benchmark tests

2K channel Directory 5k Channel Directory (+ SSL)

Query 1 Channel 15 ms 93 ms

Query 10 Channel 16 ms 39 ms

Query 100 Channel 23 ms 39.5 ms

Query 500 Channel 31 ms 70 ms

Query 1000 Channel 47 ms 86.5 ms

Query 2000 Channel 94 ms 125 ms

Channels

ChannelFinder Viewer

CSS Display ChannelFinderViewer Searching

• Name, Property value, Tags• Regular Expressions using “*”, “?”

ChannelFinder Viewer

Acknowledgement

Ralph Lange (Directory Service) Gabriele Carcassi (App/Build Servers, IRMIS) Don Dohan (IRMIS)

Questions