Flex http service result binary trading
Data access in Flex compared to other technologies. Client-side processing and server-side processing. Events, service calls, and data binding.
Using Flash Builder to access data services. Flash Builder workflow for accessing services. Extending services supported by Flash Builder. Providing access to services. The way flex http service result binary trading Flex works with data sources and data is different from applications that use HTML for their user interface. The application user interface is compiled into a binary SWF file that is sent to the client. When the application makes a request to a data service, the SWF file is not recompiled and no page refresh is required.
The remote service returns only data. Flex binds the returned data to user interface components in the client application. For example, in Flex, when a user clicks a Button control in an application, client-side code calls a web service.
The result data from the web service is returned into the binary SWF file without a page refresh. Thus, the result data is available to use as dynamic flex http service result binary trading in the application. When a user requests the JSP, the web service request is made on the server instead of on the client. The result is used to generate content in the HTML page. The application server regenerates the entire HTML page before sending it back to the user's web browser.
Another difference between Flex and other web application technologies is that you never communicate directly with a data source in Flex. You use a data access component to connect to a remote service and to interact with the server-side data source.
To get similar functionality in Flex, use an HTTPService, a web service, or a RemoteObject component to call a server-side object that returns results from a data source. Flex is an event driven technology. A user action or a program event can trigger access to a service. For example, a user clicking a button is a user action event that can be used to trigger a service call. An example of a program event is when the application completes the creation of a user interface component such as a DataGrid.
The creationComplete event for the DataGrid can be used to call a remote service to populate the DataGrid. Service calls in Flex are asynchronous. The client application does not have to wait for returned data. Asynchronous service calls are useful when retrieving or updating large sets of data. The client application is not blocked waiting for the data to be retrieved or updated. Data returned from a service call is stored in a CallResponder that you associate with the service call.
User interface components then use data binding to retrieve the returned data from the CallResponder. Data binding in Flex allows you to dynamically update a user interface component with a data source. For example, a Flex component can associate its text attribute with the lastResult attribute of a CallResponder. When the data in the CallResponder changes, the Flex component automatically updates.
Flex also implements two-way data binding. With two-way data binding, when data changes in either the Flex component or the data source, the corresponding data source or Flex component automatically updates. Two-way data binding is useful when updating remote data from user inputs to a Form component or a Flex data component. In Flex Builder 3, you implement remote procedure calls to data services using Flex data access flex http service result binary trading.
However, Flash Builder simplifies this process. Use the following workflow when using Flash Builder to create an application that accesses data services. Depending on your circumstances, you start by connecting to a data service or by building the user interface. Connect to remote service. If you start by connecting to the remote service, you then build the user interface. If you start by building the user interface, you then connect to the remote service. Flash Builder tools allow you to implement the paging of returned data and coordinate the flex http service result binary trading of sets of data.
For applications that updates several records, you can implement data management features. Data Management features include:. Code generation that automatically updates user interface components as records are added, deleted, or changed. When the application is complete, run the application to view it in operation. Use the Flash Builder Network Monitor to view data passed flex http service result binary trading the application and the service.
The Network Monitor is useful for diagnosing errors and analyzing performance. Flash Builder also provides robust debugging and profiling environments.
Flash Builder wizards and tools support access to the following type of service implementations:. If you need tooling support for additional types of services, such as Ruby on Rails, you can extend the Flash Builder implementation.
See Flash Builder Extensibility Reference. Data access flex http service result binary trading let a client application call operations and services across a network. Data access components use remote procedure calls to interact with server environments. Data access components are designed for client applications in which a call and response model is a good choice for accessing external data.
These components let the client make asynchronous requests to remote services that process the requests, and then return data to your application.
A data access component calls a remote service. It then stores response data from the service in an ActionScript object or any other format the service returns. Use data access components in the client application to work with three types of services:. The service wrapper encapsulates the functionality of the data access component, shielding you from much of the lower-level flex http service result binary trading.
This allows you to concentrate on flex http service result binary trading services and building client applications to access the services. For more flex http service result binary trading on using Flash Builder to access data services, see Building data-centric applications with Flash Builder.
By default, Adobe Flash Player blocks access to any host that is not exactly equal to the one used to load an application. If you do not use a server side application, such as LiveCycle Data Services or BlazeDS, to proxy requests, an HTTP service or web service must either be on the server hosting your application, or the remote server that hosts the HTTP or web service must define a crossdomain. Another common name for this type of service is a REST-style web service.
Optionally, you can pass arguments to the specified URI. Web service methods are commonly called operations. Web services provide a standards-compliant way for software modules that are running on various platforms to interact with each other.
For more information about web services, see the web services section of the World Wide Web Consortium website at www. WSDL is a standard format for describing the messages that a web service understands, the format of its responses to flex http service result binary trading messages, the protocols that the web service supports, and where to send messages.
Flex supports WSDL 1. Flex supports both RPC-encoded and document-literal web services. SOAP provides the definition of the XML-based format that you can use for exchanging structured and typed information between a web service flex http service result binary trading, such as an application built with Flex, and a web service.
You can use a WebService component to connect to a SOAP-compliant web service when web services are an established standard in your environment. WebService components are also useful for objects that are within an enterprise environment, but not necessarily available on the source path of the web application.
Flash Builder provides workflows that allow you to interactively connect to web services. For more information, see Accessing web services. Remote object services let you access business logic directly in its native format rather than flex http service result binary trading it as XML, as you do with REST-style services or web services.
This saves you the time required to expose existing logic as XML. Another benefit of remote object services is the speed of communication across the wire. Data exchanges still happen over HTTP or https, flex http service result binary trading the data itself is serialized into flex http service result binary trading binary representation.
Using RemoteObject components results in less data going across the wire, reduced client-side memory usage, and reduced processing time.
The client application accesses a Java object, ColdFusion component which is a Java object internallyor PHP class directly by remote invocation of a method on a designated object.
The object on the server uses its own native data types as arguments, queries a database with those arguments, and returns values in its native data types. When server-side typing is not available, Flash Builder has tools to implement client-side typing. Use the Flash Builder to configure and define types for data returned from the service. Client-side typing allows the client application to query a database and retrieve properly typed data.
Client-side typing is required for any service that does not define the type of data returned by the service. Flash Builder provides workflows that allow you to interactively connect to remote object services. For more information, see Connecting to data services. Building data-centric applications with Flash Builder.
Using cross-domain policy files. View Help PDF 1. Accessing data services overview. Data access flex http service result binary trading Flex compared to other technologies Client-side processing and server-side processing Data source access Events, service calls, and data binding Using Flash Builder to access data services Flash Builder workflow for accessing services Extending services supported by Flash Builder Data access components Providing access to services HTTPService components WebService components RemoteObject components.