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Survival of the Fittest Jini Services, Part I
Ensure the Quality of Web Services in the Age of Calm Computing
by Frank Sommers
First Published in JavaWorld, April 2001

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Summary
In the future, the industry will be motivated to develop dependable methods of software-to-software interaction on the network, where unreliable components will be eliminated automatically, resulting in the survival of the fittest services. This article is the first in a four-part series on designing and deploying highly dependable Jini services.


Sal awakens: she smells coffee. A few minutes ago her alarm clock, alerted by her restless rolling before waking, had quietly asked, "Coffee?," and she had mumbled, "Yes." "Yes" and "no" are the only words it knows ...

At breakfast Sal reads the news. She still prefers the paper form, as do most people. She spots an interesting quote from a columnist in the business section. She wipes her pen over the newspaper's name, date, section, and page number and then circles the quote. The pen sends a message to the paper, which transmits the quote to her office.

Once Sal arrives at work, the foreview (in her car) helps her to quickly find a parking spot. As she walks into the building the machines in her office prepare to log her in, but don't complete the sequence until she actually enters her office. On her way, she stops by the offices of four or five colleagues to exchange greetings and news. The telltale by the door that Sal programmed her first day on the job is blinking: fresh coffee. She heads for the coffee machine.

Coming back to her office, Sal picks up a tab and "waves" it to her friend Joe in the design group, with whom she is sharing a virtual office for a few weeks. They have a joint assignment on her latest project. Virtual office sharing can take many forms -- in this case, the two have given each other access to their location detectors and to each other's screen contents and location ... A blank tab on Sal's desk beeps, and displays the word "Joe" on it. She picks it up and gestures with it towards her liveboard. Joe wants to discuss a document with her, and now it shows up on the wall as she hears Joe's voice ...

Read the whole "Survival of the Fittest Jini Services" series:

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