Speaker
T. Johnson
(SLAC)
Description
The FreeHEP Java library contains a complete implementation
of Root IO for Java. The library uses the "Streamer Info" embedded in files created
by Root 3.x to dynamically create high performance Java proxies for Root objects,
making it possible to read any Root file, including files with user defined
objects. In this presentation we will discuss the status of this code, explain its
implementation and demonstrate performance using benchmark comparisons to standard
Root IO. We will also describe recently added support for reading files remotely
using rootd and xrootd protocols.
We will also show some uses of this library, including using JAS3 to analyze Root
data, using the WIRED event display to visualize data from Root files and using
rootd and Java servlet technology to make live plots web accessible - with examples
from GLAST and BaBar. We will also explain how you can trivially make your own root
data web-accessible using the AIDA Tag Library and Jakarta Tomcat.
