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From Apache Wiki <>
Subject [Incubator Wiki] Update of "PolokaProposal" by SergeMankovski
Date Mon, 18 Aug 2008 16:58:33 GMT
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The following page has been changed by SergeMankovski:

- =POLOKA Project Proposal=
+ = POLOKA Project Proposal =
- ==Abstract==
+ == Abstract ==
  Poloka will be a standalone reference implementation of the WS-BaseNotification, WS-Topics
and the WS-BrokeredNotification standards. It is aiming to go beyond the WS-BrokeredNotification
specification and deliver a reliable and scalable network of WS-BrokeredNotification brokers.
All existing implementations of WS-BrokeredNotification focus on implementation of a message
broker.  Poloka will implement additional features that would allow for a federation of brokers.
It will extend WS-BrokeredNotification specification with the notion of a federated broker
network and allow for a reliable, a scalable and a highly available implementation of the
WS-BrokeredNotification standard.
- ==Proposal==
+ == Proposal ==
  Poloka will provide a reference implementation of WS-BaseNotification, WS-Topics and WS-BrokeredNotification
standards. The project will provide a clear separation of functionality required by the existing
standards from additional functionality provided as an enhancement and elaboration on the
@@ -17, +17 @@

   1.	will implement a network of brokers that will provide scalability, reliability and fault
   1.	feed implementation and design experiences into the OASIS standards process and might
lead to new revisions of the WS-Notification stack of standards
- ==Background==
+ == Background ==
  Poloka is a second generation of the research project going on for the last five years at
the University of Toronto’s Middleware Systems Research Group under the [
PADRES] project.  During these years the group developed a stable code base that will form
a base for the first release of Poloka. 
@@ -29, +29 @@

  A note about the project name; we are inspired by the impact WikiWiki made on the world
of web applications. We followed the naming exampled set by author of the Wiki and simply
translated word “Broker” using a Hawaiian dictionary. Poloka simply means “Broker”
- ==Rationale==
+ == Rationale ==
  Current adoption of the WS-Notification set of standard is impeded by absence of a standalone
reference implementation. For example WS-Notification implementation in Apache Muse is incomplete
and tightly coupled with programming model of WS-RF specification. It is also packaged within
WSDM implementation.  Poloka aims to provide a “clean” implementation not tied to other
standards as a part of WS-Commons. 
@@ -37, +37 @@

  The project will follow new standards and specifications that are coming up in the space
of web-services based messaging. 
- ==Initial Goals==
+ == Initial Goals ==
   1.	Initial release of the PADRES codebase to Apache Poloka
   1.	Implementation of the WS-Base Notification, WS-Topics and WS-Brokered Notification interfaces
   1.	Creation of a reference implementation of the standards with non-federated brokers
   1.	Implement Poloka federation based on the functions of the PADRES brokers 
- ==Current Status==
+ == Current Status ==
  The PADRES project has developed a stable code base and a number of systems are built using
this code base. These systems are deployed on PlanetLab and within the PADRES lab infrastructure
(cluster with 25+ machines). Future deployments on the Amazon Computing Cloud are under investigation.
This code will become a base for the initial release of Poloka. The team conducted a survey
of licensed code used within the existing code base.  The code base can be brought up in compliance
with Apache licensing policy without much effort.  One of the members of our team is already
working on the implementation of the WS-BaseNotification, WS-Topics and WS-BrokeredNotification
interfaces. Remaining team members are preparing for the code release.
  There is one patent application submitted to the US patent office that covers use of the
federated publish/subscribe infrastructure for Enterprise Job Scheduling. The team is currently
working with the respective IP owners on the patent to ensure compliance with the Apache licensing
- ==Meritocracy==
+ == Meritocracy ==
  The project was originally started in 2002 by Prof. Hans-Arno Jacobsen and Serge Mankovski
under sponsorship of CA Inc (formerly Computer Associates), Ontario Centers of Excellence
(formerly known as CITO) and the National Science and Engineering Research Council of Canada.
 Since then the project is growing and it became known and respected in the area of distributed
event processing and messaging middleware. 
- ==Community==
+ == Community ==
  Over the years a number of companies expressed interest in this work. At the moment project
research activities are conducted in collaboration with CA Inc (formerly Computer Associates),
IBM, Sun, and Bell Canada, and the Chinese Academy of Science. The project is managed and
organized within the Middleware Systems Research Group at the University of Toronto.
  The community is built around the papers and publications produced by the research community
and also by conferences and workshops where the project is presented. 
- ==Mentors==
+ == Mentors ==
   * Dr. Hans-Arno Jacobsen is the head of the Middleware Systems Research Group and he is
leading all current research activities.
@@ -73, +73 @@

   * Dr. Kirk Wilson is a member of the WS-BaseNotification,  WS-Topics and WS-BrokeredNotification
standards committee and mentoring the team on these technologies.
- ==Core Developers==
+ == Core Developers ==
   * Dr. Balasubramaneyam Maniymaran is developing mechanisms for Complex Event Processing
using the PADRES system
   * Vinod Muthusamy is developing publish/subscribe matching algorithms and routing protocls,

   * Alex Cheung is developing load balancing and scalability features of the broker federation.
   * Guoli Li is developing composite subscription matching, message routing and historic
data access
   * Reza Sherafat is developing reliability, scalability, fault tolerance and self-healing
features of the broker federation
-  * NaweedTajuddin is developing WS-BaseNotification, WS-Topics and WS-BrokeredNotification
+  * Naweed Tajuddin is developing WS-BaseNotification, WS-Topics and WS-BrokeredNotification
   * Dr. Songlin Hu is developing business process automation solutions using the PADRES system
- ==Alignments==
+ == Alignments ==
  Apache goals, mode of operation and development focus of the WS-Commons project provide
an attractive framework for the inevitable release of the existing code base to Open Source
communities. We are planning to use Apache Axis2 code as the base for our WS-enabled broker.
The existing team of core developers and project supporters include representatives of several
companies and Apache license is conducive to their future engagement in the project. There
is an existing contact and working relationships with the Apache Muse project as well.
- ==Known Risks==
+ == Known Risks ==
- ===Orphaned Projects===
+ === Orphaned Projects ===
  Initial contributors are from major software companies and from the university research
community. The development of the related code base has been steadily growing over the last
five years and there is no risk. There are a number of requests from various individuals for
the Open Source code developed by the project. We expect that these individuals will join
this project once it becomes publicly available. Current interest in the project gives us
confidence that the community will be able to broaden the committer base in the future. 
  Inexperience with Open Source
@@ -98, +98 @@

  The Middleware Systems Research Group has released other open source projects, such as the
AspectC project (about 3500 downloads to date over a period of 2 years and 8 releases.)
is released under GPL (it is based on GPLed components.)
- ===Homogeneous Developers===
+ === Homogeneous Developers ===
  Most of the current core developers do not work for a commercial entity. They are working
on the project because it is a subject of their research and will result in PhD and Master
Degrees at some point in the future. Other core developers are working for CA and IBM and
the Chinese Academy of Sciences.   
  The team is collecting a list of persons and institutions that expressed interest in open
source implantation of PADRES over the years. We expect that this list would give us a good
start in building the community during the incubation period. 
- ===Documentation===
+ === Documentation ===
  Available in form of publications here
- ===Initial Source===
+ === Initial Source ===
  Initial source is currently in the closed source state.
- ===Source and Intellectual Property Submission Plan===
+ === Source and Intellectual Property Submission Plan ===
  The project is currently conducted under terms of a collaboration agreement between the
University of Toronto, CA Canada Company, Sun Microsystems, and the Ontario Centers of Excellence,
and includes a clause to permit the release of the project IP into open source under the Eclipse
license.  However, under current considerations, we think that the Apache community is more
closely aligned with the needs and goals of the project. Since the Apache license offers very
similar IP terms, it would be acceptable to release the IP under the Apache license.  The
team will produce a Certificate of Originality in respect to all the code released to Apache.

- ===External Dependencies===
+ === External Dependencies ===
  Currently PADRES code relies on Jess expert system shell distributed under a commercial
license by Sandia National Labs. The team will remove this dependency before the initial release
into incubation  by implementing our own version of RETE matching engine.
@@ -133, +133 @@

  Dependency on Exolab, GNU, BSD and Sun licensed code is localized and non-essential.
- ===Cryptography===
+ === Cryptography ===
  Some of the aspects of secure message transport include message encryption
- ===Required Resources===
+ === Required Resources ===
   * Mailing Lists – there are two mailing lists
   * Subversion Directory – it exists, but it is not available outside of the Middleware
 Systems Research Group
   * Issue Tracking – it exists, but it is not available outside of the Middleware Research
Systems Group
   * Other Resources
- ==Initial Committers==
+ == Initial Committers ==
   * Arno Jacobsen
   * Serge Mankovski
@@ -156, +156 @@

   * Reza Sherafat 
- ==Affiliations==
+ == Affiliations ==
   * Hans-Arno Jacobsen – University of Toronto
   * Serge Mankovski – CA Labs
   * Kirk Wilson – CA Labs
@@ -172, +172 @@

- ==Sponsors==
+ == Sponsors ==
   * Champion TBD
   * Nominated Mentors TBD
   * Sponsoring Entity TBD

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