ChannelFinderDirectory Service for EPICS Channels

Kunal Shroff – BNLRalph Lange – HZB / BESSY II

EPICS Collaboration Meeting, San Francisco, 05 Oct 2013

CS

-Stu

dio

IOC

CA client (JCA/CAJ)

IOC … IOC

pvA client

IOC …

v3 v4

directoryService

AccelUtils

Command/response

v4

Masar

Web based REST services

...

Olog

ChannelFinder API

API

…

API

API

pvmanager core

pva …caData Sources

Processing

Visualization

vTypesData Definition

BOY

cf

Aggregation

General purpose clients

Specialized clients

Log Viewer

Channel Viewer

DataBrowser

…

…

formula

graphene

…

Registry

Bindings

pvm services

masar

CS-Studio core

Core Java Client

Databases Command-line

NEW! NEW!

Pub

lish/s

ub

scri

be

Motivation

• Problem: A flat name space restricts seriously–Clients need to know all channels beforehand

–Applications need full configuration

• Solution: A generic directory service–“Query-by-functionality”

–Simple directory data structure:Channels have properties (key-value) and tags

–No dependence on installation and local conventions

Architecture

REST

ChannelFinder

MySQL

Glassfish

HTMLjson/XML

war

Easy Installation

• Download and install Glassfish • Download and install MySQL• Download ChannelFinder –Run channelfinder-base.sql script to create

database

–Drop the channelfinder.war into autodeploy folder of Glassfish

–Create JDBC connection pool resource

ChannelFinder at BNL

IOCs

Glassfish

ChannelFinderweb service

/cf-update

Web proxy

CS-StudioScripts to- populate properties

- create lattice

channelfinder.nsls2.bnl.gov

NFSupdate daemon

dependency

data flow

Java lib Python lib

High Level Physics Usage

● Physics group adds properties and tags● Directory servicehelps manage thousands of channels and create lattice structures

● Search instead of configurationkeeps HLA scripts simple with low maintenance effort

ChannelViewer

Channel Line Plot

Service Button

Auto-Complete

A Brief History2011/9

Java lib 2.1

2012/1Service 1.1

2010/11Service 1.0Java lib 1.0

SourceForgeContinuous Integration

2011 2012

2012/3Python lib

1.1

2011/6CS-Studio Application

Channel Viewer2012/3

ChannelFinder Applications Widgets

for BOY

Questions?

Thank you.