The client does not have to wait for a response from the server before continuing, as is the case for the traditional synchronous approach.

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The ability to manage state is important because it provides a way to
synchronize the properties of a UI component between the server and
client.

In the example of the component in the Sun Java Studio Creator IDE, the
bean calls the dictionary web service. The Visual Web Pack is ideal for
people who use the NetBeans IDE to develop and consume web services and
enterprise beans in web applications.

To use the component in a web page, you open the page in Sun Java Studio
Creator's Visual Designer.
The worker superclass will invoke the process  method on the EDT, so the
application can safely update UI components from that  method. Or, if an
Ajax-enabled component is available in an IDE, you can drag and drop the
component from the IDE's palette onto the page. It uses that information
to set its own  progress property. For More Information   Download the
Image Search demo source code.

It performs the primary task of the thread, and it  must provide the
thread's results in its return value.
By indicating the Icon type in the class  definition, you are telling
the compiler that both the  doInBackground and get methods will return 
an Icon object.
This class is similar to ImageRetriever because it updates a  progress
bar and provides image data. Interestingly, the process  method will
execute from the EDT. This method returns a list of cities that begin
with the characters that the user enters.

The Flickr web services require an API key to use, so you  should apply
for and use your own API key if you plan to create your  own application
that uses the services.
For example, a demonstration of the autocompletion component in the Java
Blueprints Solutions Catalog shows it in use with a name and address
form. It performs the primary task of the thread, and it  must provide
the thread's results in its return value. These components run on a
server and are rendered to the page.
The  ImageSearcher subclass has several  isCancelled calls sprinkled
throughout the code.

For  example, as the ImageSearcher subclass retrieves  a list of
thumbnail images from a Flickr web service, it could display the 
individual thumbnail images as they become available.

For a description of Project Dynamic Faces, see the article "New
Technologies for Ajax and Web Application Development: Project Dynamic
Faces". The class also implements the  java.

You don't have to wait until the thread completes before getting
intermediate results.
The server processes the data and returns a response, typically in XML
format, although other formats can be used.
For  example, as the ImageSearcher subclass retrieves  a list of
thumbnail images from a Flickr web service, it could display the 
individual thumbnail images as they become available. The  result is
that the process method runs on the EDT.
It allows developers to take advantage of the same powerful graphical
user interface development capabilities that are in the Sun Java Studio
Creator IDE while only using one IDE: NetBeans.

The custom component encapsulates the code required for those actions.
Otherwise, users will sense a pause between their input and the UI
response. Implementing a More Complete ImageSearcher   A SwingWorker
subclass can generate both final and intermediate  results.
Create your own Flickr web service client using  Flickr APIs and keys.
Both classes perform tasks in the background and track progress by 
notifying event listeners.
Providing the model  allows the worker to directly update  the list
contents. You don't have to know much  more about either creating or
using a simple worker thread. Your  SwingWorker subclass should
implement the process  method to process the intermediate results if it
also publishes  them. Notice that the retrieveImage method adds a
property  change listener to the ImageRetriever instance before 
executing the thread. This method loops  through a list of image data
and retrieves those thumbnail  images. It also  provides progress
information to a listener that updates a progress  bar in the MainFrame
class. Consequently, the  listener constructor requires that you provide
the specific  component to update.

Forging Ahead With SwingWorker Fundamentals   This section provides a
quick tour of SwingWorker functionality.
If an Ajax-enabled component is available through an IDE, you can
incorporate it into a page by dragging it from the IDE's palette and
dropping it on the page. The class type parameters say  that the
ImageSearcher's doInBackground and  get methods will return a list of 
ImageInfo objects when the thread finishes. A dictionary web service
that comes with the Sun Java Studio Creator IDE supplies the suggested
words.
The application has two progress  bars, one that tracks the search for
and retrieval of the thumbnail  image and another that tracks the
download of a larger image. Consequently, the  listener constructor
requires that you provide the specific  component to update. For
example, a demonstration of the autocompletion component in the Java
Blueprints Solutions Catalog shows it in use with a name and address
form. However, a worker  thread can produce and publish intermediate
chunks of data too.

Despite these tasks, your UI can remain snappy and responsive to the
user.
For  simplicity, this demo always asks for the first page of matching 
results.

In the preceding example code, the  ImageRetriever class calls its
setProgress  method as it receives update information from the  ImageIO
API.
Notice that the retrieveImage method adds a property  change listener to
the ImageRetriever instance before  executing the thread.

Alternatively, you might need to edit the code in the component, as
appropriate. This method returns a list of cities that begin with the
characters that the user enters.

Ajax impacts other roles too.
In this example, The completionMethod attribute references methods in a
managed bean, ApplicationBean, that is bound to the custom component.

The MainFrame class contains a  progress bar that tracks the status of
the image download. A SwingWorker instance has two important properties:
state and progress. Your thread can periodically check for the request 
and stop its work.
Including the Autocompletion Component in a Page   You can use an
Ajax-enabled custom component just as you would any other JavaServer
Faces custom component.

-

From:	Bill C. Elder <fiu@i ...........>	Received:	Jun 29, 2007
To	artoolkit-list@h ..................
Subject:	The client does not have to wait for a response from the server before continuing, as is the case for the traditional synchronous approach.
Everyone Is Watching SREA! UP Again! Score One Inc. (SREA) $0.41 UP 2.5% SREA continues its steady climb for the second week. UP nearly 400% in the last two weeks, Stock reporting sites across the board are issuing stock watch notices. Read the news, look at the numbers, and get on SREA Friday! The ability to manage state is important because it provides a way to synchronize the properties of a UI component between the server and client. In the example of the component in the Sun Java Studio Creator IDE, the bean calls the dictionary web service. The Visual Web Pack is ideal for people who use the NetBeans IDE to develop and consume web services and enterprise beans in web applications. To use the component in a web page, you open the page in Sun Java Studio Creator's Visual Designer. The worker superclass will invoke the process method on the EDT, so the application can safely update UI components from that method. Or, if an Ajax-enabled component is available in an IDE, you can drag and drop the component from the IDE's palette onto the page. It uses that information to set its own progress property. For More Information Download the Image Search demo source code. It performs the primary task of the thread, and it must provide the thread's results in its return value. By indicating the Icon type in the class definition, you are telling the compiler that both the doInBackground and get methods will return an Icon object. This class is similar to ImageRetriever because it updates a progress bar and provides image data. Interestingly, the process method will execute from the EDT. This method returns a list of cities that begin with the characters that the user enters. The Flickr web services require an API key to use, so you should apply for and use your own API key if you plan to create your own application that uses the services. For example, a demonstration of the autocompletion component in the Java Blueprints Solutions Catalog shows it in use with a name and address form. It performs the primary task of the thread, and it must provide the thread's results in its return value. These components run on a server and are rendered to the page. The ImageSearcher subclass has several isCancelled calls sprinkled throughout the code. For example, as the ImageSearcher subclass retrieves a list of thumbnail images from a Flickr web service, it could display the individual thumbnail images as they become available. For a description of Project Dynamic Faces, see the article "New Technologies for Ajax and Web Application Development: Project Dynamic Faces". The class also implements the java. You don't have to wait until the thread completes before getting intermediate results. The server processes the data and returns a response, typically in XML format, although other formats can be used. For example, as the ImageSearcher subclass retrieves a list of thumbnail images from a Flickr web service, it could display the individual thumbnail images as they become available. The result is that the process method runs on the EDT. It allows developers to take advantage of the same powerful graphical user interface development capabilities that are in the Sun Java Studio Creator IDE while only using one IDE: NetBeans. The custom component encapsulates the code required for those actions. Otherwise, users will sense a pause between their input and the UI response. Implementing a More Complete ImageSearcher A SwingWorker subclass can generate both final and intermediate results. Create your own Flickr web service client using Flickr APIs and keys. Both classes perform tasks in the background and track progress by notifying event listeners. Providing the model allows the worker to directly update the list contents. You don't have to know much more about either creating or using a simple worker thread. Your SwingWorker subclass should implement the process method to process the intermediate results if it also publishes them. Notice that the retrieveImage method adds a property change listener to the ImageRetriever instance before executing the thread. This method loops through a list of image data and retrieves those thumbnail images. It also provides progress information to a listener that updates a progress bar in the MainFrame class. Consequently, the listener constructor requires that you provide the specific component to update. Forging Ahead With SwingWorker Fundamentals This section provides a quick tour of SwingWorker functionality. If an Ajax-enabled component is available through an IDE, you can incorporate it into a page by dragging it from the IDE's palette and dropping it on the page. The class type parameters say that the ImageSearcher's doInBackground and get methods will return a list of ImageInfo objects when the thread finishes. A dictionary web service that comes with the Sun Java Studio Creator IDE supplies the suggested words. The application has two progress bars, one that tracks the search for and retrieval of the thumbnail image and another that tracks the download of a larger image. Consequently, the listener constructor requires that you provide the specific component to update. For example, a demonstration of the autocompletion component in the Java Blueprints Solutions Catalog shows it in use with a name and address form. However, a worker thread can produce and publish intermediate chunks of data too. Despite these tasks, your UI can remain snappy and responsive to the user. For simplicity, this demo always asks for the first page of matching results. In the preceding example code, the ImageRetriever class calls its setProgress method as it receives update information from the ImageIO API. Notice that the retrieveImage method adds a property change listener to the ImageRetriever instance before executing the thread. Alternatively, you might need to edit the code in the component, as appropriate. This method returns a list of cities that begin with the characters that the user enters. Ajax impacts other roles too. In this example, The completionMethod attribute references methods in a managed bean, ApplicationBean, that is bound to the custom component. The MainFrame class contains a progress bar that tracks the status of the image download. A SwingWorker instance has two important properties: state and progress. Your thread can periodically check for the request and stop its work. Including the Autocompletion Component in a Page You can use an Ajax-enabled custom component just as you would any other JavaServer Faces custom component. -