Environmental Molecular Sciences Laboratory Collaborative Research Environment Application Programming Interface Deborah A. Payne 5/5/98 Environmental Molecular Sciences Laboratory Computing & Information Sciences Pacific Northwest National Laboratory

Environmental Molecular Sciences Laboratory Overview Background Approach Java conversion rules Hello World Example

Environmental Molecular Sciences Laboratory Projects Collaboration Management (ANL, PNNL): Real-Time Session Management from both a session based metaphor and a space based metaphor. Electronic Notebooks (LBNL, ORNL, PNNL): We’re developing an Electronic Notebook system to provide a shareable, multimedia version of the traditional paper scientific notebook. Collaboratory Interoperability Framework (ANL, LBNL, PNNL, SNL): Technologies to allow scientific instruments, notebooks, and real-time collaboration tools to work together. Structural Biology LDRD Researchers collaborating electronically to perform NMR experiments. DOE2000 EMSL Operations Use of the Collaboratory tool suite as a portion of the EMSL Research Facility.

Environmental Molecular Sciences Laboratory EMSL Collaborative Research Environment CORE2000 real-time electronic Java multi-platform (Unix, PC, Mac) extends NCSA’s Habanero extensible (NOTE: I am covering the API for the CORE2000 version C2K2.0 due for release on 6/5/98. This does not match the current version available on our download site. If you are ready to add your own application via this API come see me for a pre-release version.)

Environmental Molecular Sciences Laboratory Collaborative Engine communication security floor control record and playback session information Suite of Tools audio/video conferencing (vic, vat, CUSeeMe) whiteboard shared screen viewers (TeleViewer) Chat Voting Tool Extensible remote operation of an instrument data analysis tool CORE2000 Provides:

Environmental Molecular Sciences Laboratory Two Types of Tools 3rd Party –startup –shutdown Java Hablet –converted from Java Applet or Application –integral part of system

Environmental Molecular Sciences Laboratory Example of a Collaborative Application

Environmental Molecular Sciences Laboratory CORE2000 Client 3 CORE2000 Client 2 CORE2000 Client 1 EMSL Collaborative Environment Client 1 Hablet A Client 3 Hablet A Client 2 Hablet A CORE2000 Server Hablet A ArbitratorHablet B Arbitrator Client 1 Hablet B Client 3 Hablet B Client 2 Hablet B

Environmental Molecular Sciences Laboratory Conversion Rules: Imports: –import ncsa.habanero.*; –import ncsa.habanero.streams.*; –import java.io.IOException; Applet vs. Application –applets extend Hablet –applications implement ncsa.habanero.Wrapped, and java.io.Externalizable

Environmental Molecular Sciences Laboratory Conversion Rules: Transfer the State –At Tool Startup for Clients already in a session –Clients Joining Late »Hablet methods: protected void writeHablet (MarshallOutputStream out) throws IOException protected void readHablet (MarshallInputStream in) throws IOException »Wrapped, Externalizable methods: public void writeExternal (java.io.ObjectOutput out) throws IOException public void readExternal (java.io.ObjectInput in) throws IOException Setup –startInFrame(MirrorFrame m) is the method called from the CORE2000 environment at startup. Override this method and include any startup code. –If hablet call init() and start() –Set default windows parameters

Environmental Molecular Sciences Laboratory Conversion Rules: Event Handling –for java.awt.Event handling: »static public void addSharedEventType(Class eventType, Mirrorable m) »static public void addSharedEventType(Class eventType, int id, Mirrorable m) where id is a java.awt.Event ID »example: addSharedEventType(Class.forName(“java.awt.event.MouseEvent”),MOUSE_DOWN,this); »Put this call in your startInFrame method –for User Defined Events: »Habanero.sendEvent(myEvent) where myEvent is a user defined event class that extends ncsa.habanero.ComponentAction »receiving class must have a processEvent(AWTEvent evt) method to catch the event

Environmental Molecular Sciences Laboratory Conversion Rules: Install Hablet into CORE2000 Environment –GIF 32 x 32 pixels in rsc/env/co_images of CORE2000 installation –create directory under apps with the same name as the package name for the hablet –place all hablet files in this directory –create a new file in habanero.rsc/toolsDir that tells CORE200 the name, picture, classname, version, and options help URL of the new tool Arbitrators –Central Arbitrator - passes everything it receives (default arbitrator) –Limit Arbitrator - provides locking tool.name=Hello tool.picture=hello.gif tool.classname=helloworld.Hello tool.version=1.0 tool.help=

Environmental Molecular Sciences Laboratory Hello.java Standalone Application

Environmental Molecular Sciences Laboratory CORE2000 Hello.java Hablet

Environmental Molecular Sciences Laboratory See Java Hello.java standalone code and Hello.java hablet.

Environmental Molecular Sciences Laboratory Current Team Members EMSL Collaboratory Details Deborah A. Payne Shelly Harris Shawn Merriman James D. Myers Elena Mendoza Ken Yates Kelly A. Keating Ray A. Bair Brett Didier Tom Valdez Web Address

Environmental Molecular Sciences Laboratory Acknowledgments U.S. Department of Energy –Mathematical, Information and Computational Sciences Division of the Office of Energy Research –Office of Biological & Environmental Research of the Office of Energy Research –Pacific Northwest National Laboratory (PNNL) Laboratory Directed Research and Development (LDRD) Pacific Northwest National Laboratory is a multiprogram national laboratory operated by Battelle Memorial Institute for the U.S. Department of Energy under Contract DE-AC06- 76RLO 1830.