Jc Web20 Open Source Why Floss2007

Notas del editor

• #28: AJAX term is new, but the technology is not that new.
• #31: Now that we have discussed what AJAX is and what some higher-level issues are, let's put all the pieces together and show an AJAX- enabled J2EE application. Let's consider an example. A web application contains a static HTML page, or an HTML page generated in JSP technology contains an HTML form that requires server-side logic to validate form data without refreshing the page. A server-side web component (servlet) named ValidateServlet will provide the validation logic. Figure 1 describes the details of the AJAX interaction that will provide the validation logic.
• #32: Some uses for AJAX interactions are the following: * Real-Time Form Data Validation: Form data such as user IDs, serial numbers, postal codes, or even special coupon codes that require server-side validation can be validated in a form before the user submits a form. * Autocompletion: A specific portion of form data such as an email address, name, or city name may be autocompleted as the user types. * Master Details Operations: Based on a client event, an HTML page can fetch more detailed information on data such as a product listing that enables the client to view the individual product information without refreshing the page. * Sophisticated User Interface Controls: Controls such as tree controls, menus, and progress bars may be provided that do not require page refreshes. * Refreshing Data on the Page: HTML pages may poll data from a server for up-to-date data such as scores, stock quotes, weather, or application-specific data. * Server-side Notifications: An HTML page may simulate a server-side push by polling the server for event notifications that may notify the client with a message, refresh page data, or redirect the client to another page.
• #33: Some uses for AJAX interactions are the following: * Real-Time Form Data Validation: Form data such as user IDs, serial numbers, postal codes, or even special coupon codes that require server-side validation can be validated in a form before the user submits a form. * Autocompletion: A specific portion of form data such as an email address, name, or city name may be autocompleted as the user types. * Master Details Operations: Based on a client event, an HTML page can fetch more detailed information on data such as a product listing that enables the client to view the individual product information without refreshing the page. * Sophisticated User Interface Controls: Controls such as tree controls, menus, and progress bars may be provided that do not require page refreshes. * Refreshing Data on the Page: HTML pages may poll data from a server for up-to-date data such as scores, stock quotes, weather, or application-specific data. * Server-side Notifications: An HTML page may simulate a server-side push by polling the server for event notifications that may notify the client with a message, refresh page data, or redirect the client to another page.
• #47: Too much stuff here... Need to thin it out or consolidate...
• #48: You still have all those APIs, you still have that nice fast threaded JVM, but you can work in whatever language you want to. So the first thing we have to do is to stop mixing up the Java Language and the Java Platform, and make it clear to the world that other languages—in particular dynamic languages—work fine on the platform, and that there’s nothing wrong with using them.