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From Peter Firmstone <j...@zeus.net.au>
Subject Re: JSC - Seven
Date Sun, 12 Apr 2009 22:13:31 GMT
Dennis Reedy wrote:
> I'm not sure how one relates to the other?
Make things easier for new users to get started with River? As an 
optional addition / extension to River.

Mark Brouwer, the project lead, participates in River.

Just a thought, here's some background:

Seven is an implementation of the Jini Service Container Spec.

This blog has an example:


you'll need to add the following to your hosts table to follow the link 
to download seven:

# Internet host table
# www.cheiron.org scm.cheiron.org issue.cheiron.org

from the Cheiron website:


Seven is the 'reference' implementation of the Jini™ Service Container 
Specification <http://www.cheiron.org/jsc/index.html> that eases the 
development and deployment of Jini™ services and provides features such as:

    * manage service registration with various lookup services;
    * support for distributed events, leasing and participation in the
      two-phase commit protocol, these can be persisted for 'persistent'
      services allowing for crash recovery;
    * administration interfaces for life-cycle and join management to a
    * simple persistence API that can be used e.g. to capture
      transactional state;
    * finding and tracking other services in the djinn;
    * resource management such as allocating threads and leased resources;
    * resource efficiency by employing various tactics to reduce the
      number of threads used by many of the Jini implementation classes;
    * service configuration, like the RMI runtime, (distributed)
      security, logging and configuration of objects used by the service
    * controlling codebase annotation and serving download jar files, as
      well as versioning of services and downloadable code;
    * standardized packaging format (Service Archive) for Jini services,
      see JSC Service Repository
    * installation and upgrade of a service and container, services can
      be upgraded without bringing the container down and changes to
      mobile code will propagate through the network;
    * complete security support for SSL and Kerberos, also for the
      discovery protocols;
    * role based access control for remote method invocations and for
      authorization decisions within your JSC Service code;
    * all aspects of security are dynamically (re)configurable so your
      environment can adapt to new trust relationships;
    * container can be configured through a Jini administration
      interface even the security aspects and service configuration
      data, this enables you create very dedicated provisioning
      solutions on top of Seven;
    * persistency is implemented based on top of a reliable high
      performance transactional storage engine for which data is
      checksummed and provides crash recovery with zero maintenance,
      tuning for various QoS aspects is possible.

The Seven Suite <http://www.cheiron.org/seven/index.html#seven_suite> is 
Seven together with additional tools, examples, manuals, source code and 
should provide you an out-of-the-box experience with Jini™.

The JSC Platform that is part of Seven that incorporates many Jini 
Community Standards is mainly based upon code implemented by the Jini™ 
team at Sun Microsystems (Jini™ Technology Starter Kit) and for which 
the continued development takes place at the Apache River 
<http://incubator.apache.org/river/> project.

> On Apr 12, 2009, at 811AM, Peter Firmstone wrote:
>> Due to there being no DNS for the Cherion project, would it make 
>> sense to include Seven into River after AR2 as an optional component?
>> Cheers,
>> Peter.

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