Welcome!

Java IoT Authors: Liz McMillan, Elizabeth White, Pat Romanski, Yeshim Deniz, Frank Lupo

Related Topics: Java IoT, Microservices Expo

Java IoT: Article

"Jini, Vidi, Vici" in 2004/5, Sun Hopes

Sun believes Jini's time is arriving, spokesperson says.

As announced here by Sun's Onno Kluyt last week, March 23-25 sees the latest meeting of the community that has grown around Jini - the Java-based network technology that enables adaptive network-centric services based on shared memory (JavaSpaces) and code portability.

For more information and for registering, interested developers can visit here. The event is being held in Boston, MA.

Jennifer Kotzen, senior product marketing manager for Jini at Sun, has been talking about the technology - which Sun hasn't yet used in any products, although it does use it in the development of products for dynamic connectivity services.

"Sun believes Jini's time is arriving, thanks to the advent of concepts such as grid, utility, and on-demand computing and with service-oriented architectures," Kotzen said.

"Sun responds to market demands, and what we have seen is that the need that Jini technology fulfills has not been pressing until recently," she added. "The changing marketplace is expected to result in a corresponding increase in use of Jini technologies by Sun and its competitors." The concepts behind Jini involve distributing compute cycles and services around a network on an as-needed basis, without particular regard to the origin of the cycles. Scott McNealy in his 2004 technology predictions didn't mention Jini, but has recently said:

        "There's a huge community built around [Jini]. It's getting embedded here, there, and everywhere."

Below is an extract from the "Jini and JavaSpaces" section of Karl McCabe's recent JDJ article, "Java and the Future of Ad Hoc Networking":

Jini, officially launched in mid-2000, is a technology that may be used to federate groups of users and resources required by those users. It aims to allow a network to be more flexible and more easily administered, with resources being easily located by humans and computational clients. Jini provides framework components for managing federated services, such as a lookup service for locating services, a leasing capability for controlling use of services and security, and transaction capabilities for coherent interservice interactions.

Jini operates at a level of abstraction that makes it attractive to application developers who need to solve an application problem, rather than worry about underlying networking issues. It provides a paradigm that may be useful to Bluetooth applications, since it allows services to be loosely coupled, that is, Jini nodes and services may appear and disappear from a network as a natural consequence of its operation. This loose coupling of entities is an important quality in a mobile ad hoc network.

JavaSpaces is a Jini service. It provides the abstraction of a JavaSpace into which components known as "entries" can be put. An application may "find" these entries, it can "read" (passive) or "take" (destructive) entries, and it may write entries to a space. The JavaSpaces architecture includes a notification mechanism that notifies an application when an entry is written that matches some criteria. This form of abstraction is particularly useful for passing information from stage to stage in a workflow model, or for applications where redemption of some token is important - for example, redeeming a voucher with a service provider. Interestingly, JavaSpaces also provides a useful abstraction for layering over actual physical spaces. In a Bluetooth access point scenario, this may be useful as an application model for mapping zones or spaces in which access points are installed, and for specifying which services are available in which zones.

Both Jini and JavaSpaces are good examples of creative and elegant designs for Java software frameworks that are intended to provide rich abstractions to application programmers. They have characteristics that make them well suited to ad hoc networking applications - particularly the inherently loose coupling of objects. They're not without their drawbacks, though, as I'll examine shortly.

More Stories By Java News Desk

JDJ News Desk monitors the world of Java to present IT professionals with updates on technology advances, business trends, new products and standards in the Java and i-technology space.

Comments (6) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
Cam 03/16/04 11:42:36 AM EST

If copying and emulation is the best form of flattery then apparently Jini and the concepts enumerated rock! Note the recent ''draft'' specs floated by Microsoft (et al) lately. Things like the WS eventing or the WS Dynamic discovery spec. "http://www.sys-con.com/webservices/article.cfm?id=758"
Jini is a technology that was a good idea then and is a good idea now. Success in the ''market'' is only partially driven by the quality of the technology, and is often an indication of the quality of ''marketing'', not of how good the the techology is. Jini still provides the best and most flexible solution to distributed computing problems. The concept of discovery, code movement and dynamic class loading across a network connection is a huge advantage and yet programmers seem to think that Web Services, SOAP, and WSDL are the answer to all their problems?
Now that Microsoft and .Net have copied Java with their CLR and have tried to emulate RMI with SOAP, Jini with UPnP, Remote Event with WS events, dynamic discovery with WS discovery, do you really think they have a ''better'' product? If you do, I''ve got some knives I''d like to sell you... they slice they dice they chop and all for the low low price ................
And if you think they are ''adequate'' for you, well... have an adequate life.

Trak 03/16/04 08:35:55 AM EST

isn''t the problem that Jini is ahead pf its time still? We don''t have an immediate need for our refrigerator to talk to our printer to talk to our garage door opener. Sure it''s cool to plug a network cable into the back up a printer and have everybody suddenly be able to print to it... but do we need that level of convenience? Nope. It''s simple to set up network printers on your typical windows or mac network. Microsoft''s "plug and play" is plenty adequate for the current consumer needs.

SkysTheLimit 03/16/04 08:33:50 AM EST

Jini could be a great feature. It would allow you to walk onto a campus (educational, corporate, whatever) and get access to all of the devices publically availiable. It would allow IS folks to just pop devices down wherever they''re needed and do a minimum of configuration. Moving to a new building? With Jini-enabled printers, desktops, laptops, scanners, door-locks, phones, etc. it could be done overnight.
With Bluetooth and wireless-LANS finally becoming a reality all of Jini''s features become that much more attractive and pressing. Even the US DOD drools over this kind of ability (set up a battlefield HQ in a few minutes) though their process is so glacial and baroque that nothing is likely to result from their support that would apply to the rest of us

maggard 03/16/04 08:32:50 AM EST

Jini has the classic chicken-and-egg problem: until somebody uses it nobody wants it.

XmanRocks 03/16/04 08:32:00 AM EST

Yup, hehe: Jini was the right technology introduced by the wrong vendor, at the wrong time, in the wrong way, and targeted at the wrong market

xman 03/16/04 08:31:25 AM EST

Jini is basically a mechanism for supporting dynamic, ad-hoc network applications.

The sad reality is Jini is actually an excellent technology for enterprise solutions (particularly Web solutions). Imagine the benefits of having enterprise services which can be discovered and used automatically. This means that when a system gets loaded, you just deploy a new Jini-tized component, and the without any configuration changes, the software starts spreading the load over to that component.

Unfortunately, Sun didn''t tout this aspect of Jini. Indeed, 90% of the people who know what Jini is think it''s a technology for connecting network devices. That''s a very limited and unproven market. I suspect Sun doesn''t want to let J2EE''s image become confused by allowing Jini to move in to that space.

@ThingsExpo Stories
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, will lead you through the exciting evolution of the cloud. He'll look at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering ...
SYS-CON Events announced today that N3N will exhibit at SYS-CON's @ThingsExpo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. N3N’s solutions increase the effectiveness of operations and control centers, increase the value of IoT investments, and facilitate real-time operational decision making. N3N enables operations teams with a four dimensional digital “big board” that consolidates real-time live video feeds alongside IoT sensor data a...
In a recent survey, Sumo Logic surveyed 1,500 customers who employ cloud services such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP). According to the survey, a quarter of the respondents have already deployed Docker containers and nearly as many (23 percent) are employing the AWS Lambda serverless computing framework. It’s clear: serverless is here to stay. The adoption does come with some needed changes, within both application development and operations. Tha...
SYS-CON Events announced today that Avere Systems, a leading provider of enterprise storage for the hybrid cloud, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Avere delivers a more modern architectural approach to storage that doesn't require the overprovisioning of storage capacity to achieve performance, overspending on expensive storage media for inactive data or the overbui...
With major technology companies and startups seriously embracing Cloud strategies, now is the perfect time to attend 21st Cloud Expo October 31 - November 2, 2017, at the Santa Clara Convention Center, CA, and June 12-14, 2018, at the Javits Center in New York City, NY, and learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.
SYS-CON Events announced today that mruby Forum will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. mruby is the lightweight implementation of the Ruby language. We introduce mruby and the mruby IoT framework that enhances development productivity. For more information, visit http://forum.mruby.org/.
Digital transformation is changing the face of business. The IDC predicts that enterprises will commit to a massive new scale of digital transformation, to stake out leadership positions in the "digital transformation economy." Accordingly, attendees at the upcoming Cloud Expo | @ThingsExpo at the Santa Clara Convention Center in Santa Clara, CA, Oct 31-Nov 2, will find fresh new content in a new track called Enterprise Cloud & Digital Transformation.
Amazon is pursuing new markets and disrupting industries at an incredible pace. Almost every industry seems to be in its crosshairs. Companies and industries that once thought they were safe are now worried about being “Amazoned.”. The new watch word should be “Be afraid. Be very afraid.” In his session 21st Cloud Expo, Chris Kocher, a co-founder of Grey Heron, will address questions such as: What new areas is Amazon disrupting? How are they doing this? Where are they likely to go? What are th...
Most technology leaders, contemporary and from the hardware era, are reshaping their businesses to do software. They hope to capture value from emerging technologies such as IoT, SDN, and AI. Ultimately, irrespective of the vertical, it is about deriving value from independent software applications participating in an ecosystem as one comprehensive solution. In his session at @ThingsExpo, Kausik Sridhar, founder and CTO of Pulzze Systems, will discuss how given the magnitude of today's applicati...
SYS-CON Events announced today that NetApp has been named “Bronze Sponsor” of SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. NetApp is the data authority for hybrid cloud. NetApp provides a full range of hybrid cloud data services that simplify management of applications and data across cloud and on-premises environments to accelerate digital transformation. Together with their partners, NetApp emp...
Smart cities have the potential to change our lives at so many levels for citizens: less pollution, reduced parking obstacles, better health, education and more energy savings. Real-time data streaming and the Internet of Things (IoT) possess the power to turn this vision into a reality. However, most organizations today are building their data infrastructure to focus solely on addressing immediate business needs vs. a platform capable of quickly adapting emerging technologies to address future ...
SYS-CON Events announced today that SkyScale will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. SkyScale is a world-class provider of cloud-based, ultra-fast multi-GPU hardware platforms for lease to customers desiring the fastest performance available as a service anywhere in the world. SkyScale builds, configures, and manages dedicated systems strategically located in maximum-security...
Join IBM November 1 at 21st Cloud Expo at the Santa Clara Convention Center in Santa Clara, CA, and learn how IBM Watson can bring cognitive services and AI to intelligent, unmanned systems. Cognitive analysis impacts today’s systems with unparalleled ability that were previously available only to manned, back-end operations. Thanks to cloud processing, IBM Watson can bring cognitive services and AI to intelligent, unmanned systems. Imagine a robot vacuum that becomes your personal assistant th...
SYS-CON Events announced today that Avere Systems, a leading provider of hybrid cloud enablement solutions, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Avere Systems was created by file systems experts determined to reinvent storage by changing the way enterprises thought about and bought storage resources. With decades of experience behind the company’s founders, Avere got its ...
SYS-CON Events announced today that Taica will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. ANSeeN are the measurement electronics maker for X-ray and Gamma-ray and Neutron measurement equipment such as spectrometers, pulse shape analyzer, and CdTe-FPD. For more information, visit http://anseen.com/.
High-velocity engineering teams are applying not only continuous delivery processes, but also lessons in experimentation from established leaders like Amazon, Netflix, and Facebook. These companies have made experimentation a foundation for their release processes, allowing them to try out major feature releases and redesigns within smaller groups before making them broadly available. In his session at 21st Cloud Expo, Brian Lucas, Senior Staff Engineer at Optimizely, will discuss how by using...
In this strange new world where more and more power is drawn from business technology, companies are effectively straddling two paths on the road to innovation and transformation into digital enterprises. The first path is the heritage trail – with “legacy” technology forming the background. Here, extant technologies are transformed by core IT teams to provide more API-driven approaches. Legacy systems can restrict companies that are transitioning into digital enterprises. To truly become a lead...
SYS-CON Events announced today that Yuasa System will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Yuasa System is introducing a multi-purpose endurance testing system for flexible displays, OLED devices, flexible substrates, flat cables, and films in smartphones, wearables, automobiles, and healthcare.
SYS-CON Events announced today that CAST Software will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. CAST was founded more than 25 years ago to make the invisible visible. Built around the idea that even the best analytics on the market still leave blind spots for technical teams looking to deliver better software and prevent outages, CAST provides the software intelligence that matter ...
SYS-CON Events announced today that Daiya Industry will exhibit at the Japanese Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Ruby Development Inc. builds new services in short period of time and provides a continuous support of those services based on Ruby on Rails. For more information, please visit https://github.com/RubyDevInc.