Welcome!

Java IoT Authors: APM Blog, Stackify Blog, Liz McMillan, Elizabeth White, Yeshim Deniz

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
"Akvelon is a software development company and we also provide consultancy services to folks who are looking to scale or accelerate their engineering roadmaps," explained Jeremiah Mothersell, Marketing Manager at Akvelon, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
In his session at 21st Cloud Expo, Carl J. Levine, Senior Technical Evangelist for NS1, will objectively discuss how DNS is used to solve Digital Transformation challenges in large SaaS applications, CDNs, AdTech platforms, and other demanding use cases. Carl J. Levine is the Senior Technical Evangelist for NS1. A veteran of the Internet Infrastructure space, he has over a decade of experience with startups, networking protocols and Internet infrastructure, combined with the unique ability to it...
"Space Monkey by Vivent Smart Home is a product that is a distributed cloud-based edge storage network. Vivent Smart Home, our parent company, is a smart home provider that places a lot of hard drives across homes in North America," explained JT Olds, Director of Engineering, and Brandon Crowfeather, Product Manager, at Vivint Smart Home, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
"IBM is really all in on blockchain. We take a look at sort of the history of blockchain ledger technologies. It started out with bitcoin, Ethereum, and IBM evaluated these particular blockchain technologies and found they were anonymous and permissionless and that many companies were looking for permissioned blockchain," stated René Bostic, Technical VP of the IBM Cloud Unit in North America, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventi...
Gemini is Yahoo’s native and search advertising platform. To ensure the quality of a complex distributed system that spans multiple products and components and across various desktop websites and mobile app and web experiences – both Yahoo owned and operated and third-party syndication (supply), with complex interaction with more than a billion users and numerous advertisers globally (demand) – it becomes imperative to automate a set of end-to-end tests 24x7 to detect bugs and regression. In th...
Large industrial manufacturing organizations are adopting the agile principles of cloud software companies. The industrial manufacturing development process has not scaled over time. Now that design CAD teams are geographically distributed, centralizing their work is key. With large multi-gigabyte projects, outdated tools have stifled industrial team agility, time-to-market milestones, and impacted P&L stakeholders.
"Cloud Academy is an enterprise training platform for the cloud, specifically public clouds. We offer guided learning experiences on AWS, Azure, Google Cloud and all the surrounding methodologies and technologies that you need to know and your teams need to know in order to leverage the full benefits of the cloud," explained Alex Brower, VP of Marketing at Cloud Academy, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clar...
Widespread fragmentation is stalling the growth of the IIoT and making it difficult for partners to work together. The number of software platforms, apps, hardware and connectivity standards is creating paralysis among businesses that are afraid of being locked into a solution. EdgeX Foundry is unifying the community around a common IoT edge framework and an ecosystem of interoperable components.
"MobiDev is a software development company and we do complex, custom software development for everybody from entrepreneurs to large enterprises," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Coca-Cola’s Google powered digital signage system lays the groundwork for a more valuable connection between Coke and its customers. Digital signs pair software with high-resolution displays so that a message can be changed instantly based on what the operator wants to communicate or sell. In their Day 3 Keynote at 21st Cloud Expo, Greg Chambers, Global Group Director, Digital Innovation, Coca-Cola, and Vidya Nagarajan, a Senior Product Manager at Google, discussed how from store operations and ...
"There's plenty of bandwidth out there but it's never in the right place. So what Cedexis does is uses data to work out the best pathways to get data from the origin to the person who wants to get it," explained Simon Jones, Evangelist and Head of Marketing at Cedexis, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
SYS-CON Events announced today that Telecom Reseller has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. Telecom Reseller reports on Unified Communications, UCaaS, BPaaS for enterprise and SMBs. They report extensively on both customer premises based solutions such as IP-PBX as well as cloud based and hosted platforms.
It is of utmost importance for the future success of WebRTC to ensure that interoperability is operational between web browsers and any WebRTC-compliant client. To be guaranteed as operational and effective, interoperability must be tested extensively by establishing WebRTC data and media connections between different web browsers running on different devices and operating systems. In his session at WebRTC Summit at @ThingsExpo, Dr. Alex Gouaillard, CEO and Founder of CoSMo Software, presented ...
WebRTC is great technology to build your own communication tools. It will be even more exciting experience it with advanced devices, such as a 360 Camera, 360 microphone, and a depth sensor camera. In his session at @ThingsExpo, Masashi Ganeko, a manager at INFOCOM Corporation, introduced two experimental projects from his team and what they learned from them. "Shotoku Tamago" uses the robot audition software HARK to track speakers in 360 video of a remote party. "Virtual Teleport" uses a multip...
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, whic...
SYS-CON Events announced today that Evatronix 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. Evatronix SA offers comprehensive solutions in the design and implementation of electronic systems, in CAD / CAM deployment, and also is a designer and manufacturer of advanced 3D scanners for professional applications.
Leading companies, from the Global Fortune 500 to the smallest companies, are adopting hybrid cloud as the path to business advantage. Hybrid cloud depends on cloud services and on-premises infrastructure working in unison. Successful implementations require new levels of data mobility, enabled by an automated and seamless flow across on-premises and cloud resources. In his general session at 21st Cloud Expo, Greg Tevis, an IBM Storage Software Technical Strategist and Customer Solution Architec...
To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. In his session at @BigDataExpo, Jack Norris, Senior Vice President, Data and Applications at MapR Technologies, reviewed best practices to ...
An increasing number of companies are creating products that combine data with analytical capabilities. Running interactive queries on Big Data requires complex architectures to store and query data effectively, typically involving data streams, an choosing efficient file format/database and multiple independent systems that are tied together through custom-engineered pipelines. In his session at @BigDataExpo at @ThingsExpo, Tomer Levi, a senior software engineer at Intel’s Advanced Analytics gr...