Ajax

This behavior is suitable for applications that use Ajax to connect to a data feed or to save the user's input.

I've shown just a few of the different types of interface elements that you can build with Ajax, PHP, and the Prototype. js library.

Ajax development is an exciting opportunity for you to create new and innovative approaches for delivering content to your users.

Fundamental to almost all applications that call themselves Ajax based is the creation of a component known as the XMLHttpRequest object.

Of course these tasks were always possible with HTML forms, but Ajax makes it easy to send data asynchronously in the background.

A generous helping of Ajax makes it easy to arrange or rearrange the portlets onto the page as you think is best.

Do you remember your first Web application with Ajax support and how much effort it required to implement?

Ajax, while powerful, has not been as quickly adopted among the enterprise development community largely due to its unstructured nature.

Unless you know all three of these methods (and their relative strengths and weaknesses), you won't get the full picture.

I had to pick it up quickly because I realized that I was ill - prepared to work on a real-world AJAX application without it .

The key to the solution of this problem is left up to Ajax development tools -- the next problem area.

A Web site that relies on Ajax techniques will have to put in extra care to ensure that it still shows up in search queries.

Even then, it was readily apparent that JSF made adopting Ajax more difficult than it had to be.

Gmail also showed how much you could do with web-based software, if you took advantage of what later came to be called "Ajax. "

Particularly if you are creating Flash applications yourself (I said the same thing about Jobby with their use of Ajax back in March).

Stay tuned for the next part of this series where you'll learn how to call remote JavaScript functions with Ajax.

Finally, I threw in a little Ajax on the front-end, for a smoother end-user experience.

In addition, other parameters are available with which you can set the timeout of an Ajax request or the "Last Modified" state of a page.

Fortunately, Ajax turns out to be one of many things made easier by only having to worry about standards-based browsers.

RAP is a AJAX framework with a server-side focus and a strong tie into OSGi, Equinox and the Eclipse Platform.

Doing so isn't terribly difficult, but it does require two additional technologies: some server-side processing and a bit of Ajax.

'Hoffenheim will only be an option if Ryan isn't allowed to go on loan to Ajax or they do not want him, ' he said.

For instance, Ajax is often used in response to user input to modify parts of a page with new data fetched from the server.

Services that are expected to run for a long time can be problematic to call using Ajax, but there can be valid cases for using them.

Ajax have spoken this week about their desire to extend the hitman's contract, but rumours linking him with a summer departure persist.

My spell at Ajax may be close to an end but I have to say I have had some wonderful years here.

Introducing Ajax -- just like any other technology or pattern -- into a Java EE application has its advantages and disadvantages.

The term Comet has been used to describe push technologies applied to Ajax web applications.

Google Maps was one of the first Ajax applications that captured the imagination of developers and users alike.

DWR makes it easy to enable Ajax on the back-end of an application.

Gmail wasn't the first Ajax website, but it was one of the first to prove it could work on a mass scale.

Both the server and the client must be prepared to get Ajax requests and responses out of order, and some of them might even be missed.

The investment climate for technology startups seems to have become friendly again, and one of the magic keywords these days is Ajax.

Is all you need, but you ll soon learn about dealing with XML through Ajax applications as well.

Ajax won 4-0, however Babel wasn't on the scoresheet yet and that was to be his last contribution for the remainder of that season.

Another scenario where Ajax is particularly useful is in grouping large sets of data into pages, usually referred to as pagination.

With Ajax, you can avoid page reloads while waiting for the next piece of content to be presented in the Web services portal.

While it is possible to use cookies or Ajax calls to a servlet to check and store state information, avoid a dependency on the page's state.

JSON4J can be used to convert an XML reply from a Web service into a JSON structure for easy use in an Ajax application.

If you're considering AJAX, take a look at Figure 1 , which illustrates the architectural implications of such a move.

You'll also see why XML is not always the way to go: transferring plain text can be an expedient choice for simple Ajax requests.

This same behavior would have to be coded explicitly in the script-based framework that partners with the browser in an AJAX application.

Wenger's youngsters were subjected to a brutal kicking from Ajax during Saturday's warm-up in the Amsterdam Arena.

Migrate to frameworks that support Ajax: Newer frameworks are beginning to support the asynchronous communication model.

In the lower world Ajax chose to be a lion, guided clearly by the bitter recollection of his former life.

The Web is an unreliable world, and contingency planning should be part of any Ajax application.

Make it easy to create responsive user interfaces through effective use of Ajax techniques.

AJAX cascading menu, very easy to use, realize asynchronous submission!

I had to get used to that because in Ajax we were staying for one or two hours longer on the pitch by ourselves.

In the AJAX example below we will demonstrate how a web page can communicate with a web server online as a user enters data into a web form.

Next, take a look at the JavaScript code that responds to the Ajax invocation and displays the inventory, shown in Listing 4.

Implementing an Ajax UI in place of a regular forms-based one may dramatically increase the number of requests made to the server.

The long wait for an entire page to refresh from a Web server isn't necessary in an AJAX-based application.

Such start- ups have been helped by Ajax "frameworks" - ready-to-run Web 2. 0 packages.

Ajax is a means of providing Web application users with a rich experience by changing the display without refreshing the page.

Keep the shopping cart visible: Your new Ajax interface shows users their shopping carts only at the beginning and end of the process.

You can use the simple techniques discussed here in a real application if you want to be able to change the Ajax code easily.

As a rule of thumb, I recommend partial rendering as the best approach for building a rock-solid first AJAX version of a site.

As a result, your Ajax code (and specifically, the XMLHttpRequest object) can only make requests to the same domain on which it's running.

If you're ready to jump onto the Ajax development wagon, the following roadmap gives you a list of steps to get you started.

You were introduced to a non-trivial bank scenario that spans across all three tiers of an Ajax application.

Meebo is a fantastic example of a hosted chat application with a simple but elegant interface that works over Ajax.

As the moderator of the Ajax forum on developerWorks (see Resources), the issue of polling and real time comes up at least once each month.

These sidebars contain indexes to standards defining the individual Ajax technologies and allow you to use them as a reference guide.

With code setup like this, you'll need to call this method before you do any Ajax work.

When used in Ajax applications they involve additional HTTP requests and slow down the loading of your application.

Meanwhile, the system uses AJAX technology to draw the basic attributes of good graphics, incoming server, saved to the graphics database.

If you know the information is updated every few minutes, try to time the Ajax requests to the same frequency.

One of the features was an nice Ajax based slider that allowed the users to filter out content based on some ranking algorithm.

Every user action that normally would generate an HTTP request takes the form of a JavaScript call to the Ajax engine instead.

In order to make the system easy to use and improve its efficiency, the thesis also makes a discussion on usage of AJAX technology.

You might have noticed that the tooltips and modal dialogs aren't really traditional Ajax calls.

A real, production-quality site would have to anticipate and recover from failed Ajax calls due to server errors or network latency.

The fact that Flex supports binary data transfer probably puts it far ahead of Ajax in terms of data transfer rates and compactness.

Providing such static screens was the primary objective of Ajax technology and you can accomplish this with JSON as well.

Ajax has also been around for a while, but it's only recently that more Web sites are being developed using Ajax practices.

Introducing Ajax into a Java EE Web application has implications for separation of concerns (and therefore separation of developer roles).

Sending every mouse movement might not be a very efficient use of the system, but it demonstrates the interactivity of Ajax.

When publishing applications on the Internet, be careful about moving too much of your business logic into Ajax and away from the server.

In most cases it could still be generated by the back end, but it would be embedded directly in the page rather than loaded via Ajax.

To create your Ajax tabs, however, those links need to be transformed into a format that jQuery UI Tabs can understand.

When Rico makes an Ajax request to the backend it might send up to four parameters as a query string in the URL.

Asynchronous JavaScript XML (Ajax) has had a profound impact on the way information can be delivered to a client's browsing session.

If your Web page was served from a. com, then you can only make Ajax (or more precisely, XMLHttpRequest) calls to a. com.

Development teams can take advantage of a wide range of performance-enhancing tools available for Ajax applications.

An Ajax solution may not increase the bandwidth demands, but it will stress the Domino server in terms of number of transactions.

Figure 1 shows the Ajax-based form ready to be submitted.

Doing this causes an instance of the Ajax engine to be automatically created and made accessible via an object named ajaxEngine.

But by loading complete documents, you're able to use the same URL for both the Ajax and non-Ajax version of each page.

Ajax, however, is just a fancy acronym for the combination of JavaScript and XML.

It has loaded the dojo AJAX framework from the server while simultaneously making a call to a resource on the server to fetch news articles.

This article also prepares you for a future tutorial, in which we will detail the creation of an Ajax portlet application.

jQuery UI Tabs turns ul elements into a tabbed interface and turns chunks of inline or Ajax markup into the content for those tabs.

A more obvious example might be the Luigi Bormoli website, which uses AJAX to produce an elegant presentation of glassware.

Committed to Ajax for another two years, Klaas-Jan Huntelaar has admitted a decision on his future is not really his to make.

Task 7: Integrate all the artifacts, deploy, and run the Ajax solution created for the bank scenario.

This function is reading the text response to the AJAX request into a variable and adding the text into our login page by changing the DOM.

With all the work you've done to add Ajax to the application, it might seem like Ajax is the solution to all of your problems.

As the browser is becoming more and morepowerful, it is now easy to use Ajax or offline storage to solve thestate problems client-side.

Compared with traditional Web applications, Ajax-based applications make it possible to provide much more responsiveness and interactivity.

You can set up Ajax Chat as a stand-alone version on your server or use one of the forum integration versions.

When online, the application will be able to display a "recipe of the day, " provided via a web service delivering content via Ajax.

Ajax lets you update just a fragment of your Web page.

It does appear, however, that Stam will have played his last match for the club, with a switch to Ajax already confirmed for this summer.

Let's take a look at each of these steps in creating an Ajax-based autosuggest field.

The Rails Ajax experience is broad and deep -- much deeper than I can cover in a single article or even a series.

For the sake of this example, the Transfer Funds button, shown in red, invokes an Ajax call.

On the whole, the code-generation approach trades off too much flexibility and convenience to be useful for the typical Ajax application.

Ajax is not a technology by itself, but rather a combination of a few key ideas.

AJAX is based on existing standards. These standards have been used by most developers for several years.

RESTful Web services provide Ajax with a very simple API to deal with the interactions with resources on the server.

You could also integrate a custom theme extension that would display a common Please Wait message for any Ajax-enabled portlet on the page.

It turns out that the AJAX Control Toolkit project began accepting patches via a " Patch Utility" back in April with little fan-fair.

Ajax is one of the key to reduce unnecessary traffic since you load only required contents without reloading the full page.

Innovations like these will allow Geronimo to be much more scalable in a future world as Ajax becomes even more prevalent.

You can remove it at this point, or you can leave it in place for possible future Ajax calls.

Yes, it would appear that AJAX can do it all and that no desktop visual effect or gesture is safe from being outsourced to the Web.

Ajax would provide a way out for server-side processes but is of no use on the client.

Ajax and Auxerre advanced through the preliminaries making a great impression, they are opponents to be feared.

It provides an example of how REST Web services, Ajax, and Spring Web Flow work together to produce a desktop-like rich Web interface.

Note that you can hide the use of a proxy server in the implementation of the Ajax library used by the Web application developer.

At this point you can either log in with the username of cloudscape and password of ajax, or create a new user.

Plenty of Ajax applications work well without any XML code at all: They merely pass HTML or even plain text back and forth.

Don't worry about the hard stuff for now; get your head around the basics, and you'll soon build up a whole arsenal of Ajax tools.

Enterprise Ajax for Java is a commercial product, but open source projects can still take advantage of it.

Keep in mind that each time you add Ajax to a site, you're also responsible for fixing any problems it causes for your users.

AJAX is based on open standards. These standards have been used by most developers for several years.

You've seen how GWT can be used for creating UI elements and using Ajax to retrieve and save data to back-end services.

Ajax is one of the latest bleeding-edge technologies Web developers use to enable rich client presentation.

Ajax represented the next generation of Web development and lent itself to the creation of innovative browser-based user interfaces.

In the AJAX Proxy Configuration Editor, you specify paths that map to a URL on a remote domain, as shown in Figure 14.

Once again, you can see that the Rails insulates developers from the differences between applications that use Ajax and those that don't.

The server-side only requires a few Java annotations to turn any service into an Ajax service.

Various AJAX toolkits rely on this, yet it has not been standardised.

None of the Ajax content gets loaded until the user clicks the corresponding tab, which saves bandwidth.

Is one of the companies on the leading edge of user interface design; you can learn a ton about Ajax by perusing their pages.

Of course, there's more to Ajax optimization than I can include in this tutorial.

The rest of the code is similar to what I had in the Ajax test page in Listing 2.

This article walks through the construction of an Ajax-based RSS reader using both XMLHTTP and tags as the transport mechanisms.

For instance, they need to be able to decide whether a certain feature needs AJAX or a conventional page refresh.

Perhaps the most common Ajax task is to request updated HTML from the server and update a portion of the page with it.

The template will render a page using several tables and fetch text to be rendered in a table cell from a separate file by AJAX.

It lets you declaratively expose server-side code as an Ajax endpoint, generating all the plumbing for you auto-magically.

As part of the next-generation version of SWT, RAP plans to provide a fully AJAX-based implementation of SWT.

The only request on Start is entering a nickname with immediate (Ajax) check is the nickname is not occupied.

After that, I add a tag called counter, which holds the result of the return from the Ajax request.

The next three examples are all ways to deal with tables using Ajax techniques (or something that looks like Ajax).

Your web app can be AJAX, Flash, or applet with any back end, provided only it is launched in a web page with a URL.

Some Web sites are built completely with JavaScript code and Ajax -- a practice I recommend that you avoid if at all possible.

In all of these cases, Ajax and a Web 2. 0 approach make it possible to send and receive data without updating an entire HTML page.

You realize that this is a non-negotiable point from the marketing department, so you also continue with the Ajax implementation.

This is a DWR annotation that lets DWR know this class can be automatically marshaled and sent across the wire as part of an Ajax response.

To see more examples of Wicket AJAX support please refer to time zone panels in Global Project.

Later, in " Many-to-many relationships with a dollop of Ajax, " you used GORM to model increasingly sophisticated class relationships.

Next, it clears any existing error message and, based on the result of the Ajax post, displays or does not display an error message.

The aim of this tutorial is to provide a sample package to form the basis for your Ajax implementations.

AJAX for network bandwidth ceased to be a problem, website speed no longer be a problem.

The Ajax community is fast moving, and there's a great deal of valuable information out there.

Going forward, look to leverage frameworks with out-of-the-box Ajax support to reduce the complexity of the integration.

Asynchronous requests for data from the client (one of the neat things about Ajax) to the server require the HTTP protocol.

Ajax requests are inherently asynchronous, so this check safeguards against server responses that arrive out of sequence.

It does not cover Ajax specifically, but teaches important lessons about how important good design is for a Web site.

It's now quite common to see existing services provide SOAP, Ajax, and REST interfaces.

Ajax was a man of giant stature, daring but slow.

It's not going to be an ordinary text field, though, since it will have your Ajax-ish autosuggest feature.

jQuery UI Tabs, a jQuery plug-in, allows you to wrap inline or Ajax content in a tabbed interface.

When a user logged in, and then serve up either an Ajax version of the application or a regular forms-based version as appropriate.

Before Ajax, the common technique was to have both tabs on the page, then hide or show them on demand.

If this attribute set to "true" , no one of the components outside of region will be included to AJAX response.

The IO module specified can be used to rewrite any URL to reroute the Ajax requests through the build-in Home page AJAX proxy.

Ajax is best used for making small changes and updates to a page.

A JavaScript function that uses Ajax accesses a URL and is capable of doing something with the response.

Most JavaScript frameworks have some form of Ajax object with a request method that accepts a series of options as an argument.

This page has an example of exactly what I am looking for on the front end. . . it appears this one uses AJAX.

We also need to configure the DWR client side engine to use active Reverse Ajax, so we need to call dwr. engine. setActiveReverseAjax(true).

Within the faces JavaScript object there must be another JavaScript associative array under they key Ajax.

All that remains is some normal Ajax interaction.

Ajax is also the driving force behind many mashups, which integrate content from multiple sources into a single Web application.

This one has the advantage of being able to display any arbitrary HTML code, fetched using Ajax, from the server.

Developers can choose to either alleviate the strain on the system resources needed to complete the calculation or fix the application.

Developers can choose to either alleviate the strain on the system resources needed to complete the calculation or fix the application.

Lynx can be a great tool for making sure that important search terms aren't hidden away behind Ajax widgets.

You can combine those players with the code above to make a complete end-to-end video-sharing solution with an Ajax front end.

Ajaxian: Keep up with developments in Ajax and the front-end widgets that use it with this great resource.

And Ajax's best-of-both-worlds approach leverages client-side and server-side code to present an almost seamless UI to the Web user.

One of the most compelling reasons to use a JavaScript framework is for standardized cross-browser Ajax requests.

Finally, you need to remember that DWR Ajax calls are asynchronous and should not be expected to return in the order they were dispatched.

Now it's extremely simple, and has led to my applications taking full advantage of everything that Ajax can offer.

AJAX can be used for interactive communication with database.

The transport protocol is Ajax, but you do not need to worry about the details of how the packets are transferred.

Part 1 of this series gets you started on the road to building those amazing Ajax applications of your own.

Although dressed like a pure AJAX remote call, an AJAX postback looks like a regular postback request to the ASP. NET runtime components.

Despoof is another security tool you can use in detecting spoofed packets used to carry your Ajax applications across networks.

Wicket framework comes with a set of reusable AJAX behaviors and components.

All Ajax applications use an approach that looks something like this sequence.

At the top of the file, I include the prototype. js JavaScript file, which will do all the Ajax work for me.

The real test of a good Ajax developer is how they handle the pieces of the application and its user interface.

You can still configure a panel to refresh when a state-changed event occurs on the server during an AJAX postback.

Because you're going to update the outputText with Ajax, you need to put it inside of a panel component.

I never spent a lot of time practising to head the ball at the Ajax Academy.

Server-side code will detect whether the user is logged in, and then render the appropriate partial with Ajax.

This kind of asynchronous flow is one of the most common pitfalls of Ajax programming.

Microsoft is saying all the right things about RSS, Ajax, social networking, Internet as platform, software as a service, etc.

Reverse AJAX: Service Streaming, as applied to AJAX, is known as Reverse AJAX or COMET .

It is important to note here that this Ajax implementation uses a POST, as opposed to a GET, to process the request.

The first step in developing the Ajax slide show is to put together the REST data service.

Bergkamp, now a coach at Ajax, reckons Van Persie would be better utilised in a deeper, more creative role.

A much more common scenario requires you to handle both general requests and Ajax requests.

You might be surprised to know that many of these patterns were thought of before anybody had ever uttered the term Ajax.

With Ajax firmly established as a widespread Web application-development technique, several common Ajax usage patterns have emerged.

When the Start Cloudscape Ajax Demo button is pressed, a request is made to the Web server to return the next page, firstpage. html.

In fact, you'll be hard-pressed to do much in the Ajax and JavaScript worlds without using the DOM to at least some degree.

An Ajax application uses HTML to build Web forms, while DHTML is used to mark up the HTML so your forms can be updated dynamically.

In this article, I focus on Nagios, an open source host, service, and network monitoring program for your Ajax applications.

So while Ajax can't give you cool effects on a page, it does provide the means for a Web application to mimic a desktop application.

The Ajax faithful responded in kind with a rendition of 'You'll Never Walk Alone'.

The DOM Inspector and JavaScript Debugger extension take a lot of the pain out of Ajax development.

And I want to say something else: Van Basten still has two years on his Ajax contract but I know he wants to coach in Italy.

Using Ajax, you can load the results for the next page asynchronously, and update the page accordingly.

Thanks to built-in Wicket AJAX engine we did not have to write a single block of JavaScript code or manually link a JavaScript library.

To work around this limitation and have rich reflection over JavaScript classes, ASP. NET AJAX requires the names of types to be registered.

Using Ajax, the same process requires less time on the front end.

Ajax enables you to build Web applications that are highly dynamic, scalable, and user-friendly.

The hallmark of an Ajax application is a rich, interactive environment more often associated with traditional UI applications.

In addition, the signature of the function that must be invoked on the server side is provided as an HTTP header named Ajax-Call.

That's one of the hallmarks of most Ajax apps -- the visible content changing without reloading pages.

The response of an AJAX postback is a text stream that can be seen as a table of records with Size, Type, ID, and Content columns.

As you select the Refresh option in the previous step, you must indicate the specific parameters that will be sent in the Ajax request.

The processing life cycle of an Ajax request that auto-saves form data must be stopped after the Validation phase.

The ScriptManager control checks an HTTP header in the request to determine whether the request is an AJAX postback.

The System Info portlet has a cool new server memory usage graph that updates in real time using Asynchronous JavaScript XML (Ajax).

As described, Ajax is a technique to retrieve server-side content without requiring the entire Web page to be refreshed.

You are going to use GWT to make an Ajax request to a remote service, so your trigger is calling JavaScript instead.

Ajax accomplishes this by building an extra layer of processing between the Web page and the server over the HTTP protocol.

The ideal would be an ajax or similar news feed that updated every minute or so without requiring any user input.

If he got 35 goals at Ajax, surely he has a chance of scoring some goals here as well.

The simple nature of the RESTful Web services makes accessing them from a Web client technology such as Ajax much simpler.

ASP. NET AJAX also does some type checking in debug mode where it makes sense to help developers catch bugs earlier.

Rather than having a user click additional links or load additional pages, I'm going to use a little Ajax to smooth the path.

If you are new to Ajax, it is a Web development technique used for creating interactive Web applications.

If the header marking the Ajax requests is not present, the user must have clicked the Submit button of the Web form.

Active traffic monitoring is one tool to measure performance of the network traffic of Ajax applications continuously.

As usual, Ajax do not disclose financial details of the agreement.

This helps reduce the Ajax traffic and speed up a bit the server's response.

XForms can accomplish the same thing and be used to put the "A" and "X" in Ajax.

The process of adding Ajax to a page used to be excruciating.

First, Ajax applications are almost always written for a specific server-side script, servlet, or application.

The HTML can be retrieved by Ajax calls from a Web page to a REST service that exposes this component.

In a future related tutorial, we will show you how to put all the pieces together to produce an Ajax-enabled database administration tool.

A table- or field-name change would break an embedded SQL statement, and a URL change would break an embedded Ajax call.