BlazeDS 3 Installation Guide. Contents. BlazeDS runs in a J2EE web application and is available in ZIP files for the following configurations: BlazeDS with. 07/06 – Published the new version of guide. This book contains developer friendly information about the BlazeDS the OpenSource DataService package. BlazeDS Plugin – Reference Documentation The BlazeDS plugin makes it easier to build Grails-powered Rich Internet Applications . Manual configuration .
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Polling is very resource and network intensive. Management of the communication channels between Flex and Java.
Boazeds distribution Distributing work optimally between a client and its server is an important guidd when architecting RIA. Create the remoting destination A Remoting destination exposes a Java class that your Flex b,azeds can invoke remotely. It has first-class support for publish-subscribe messaging domain. BlazeDS instances can be clustered and the following techniques can be applied to make applications scale better: Setting up your BlazeDS environment.
BlazeDS based message services leverage two types of built-in adapters, namely: The three alternative serverside message services in Spring BlazeDS are:. Only a couple of quick examples are shown to give you a flavor the typical configuration elements. Management of connection types between Flex and Java. Create a Java project You will need a Java project to work on the server side of the applications built in this tutorial. The ProductDAO class provides the data access logic to retrieve and update products Products are transferred between the client and the server using Product objects value objects.
To subscribe to a destination, you use the subscribe method of the Ugide class.
Building a remoting application. Channels and endpoints connect a Flex client to a BlazeDS server. In addition, BlazeDS enables the creation of a new breed of real-time data push and collaborative applications. RemoteObject calls are asynchronous. The method can return a value of a primitive data type, an object, a collection of objects, an object graph, and more.
The dsadapters project http: For beginners, it’s convenient, appropriate and guiide to get the latest release version of the binary turnkey distribution. Data Format Optimization AMF3 facilitates a very efficient way of binary transmission of data between the server and the client.
Because you will work on both the client side and the server side of the applications built in this tutorial, you need to use Flex Builder plug-in configuration and install Flex Builder 3 on top of Eclipse. If the accessed data is not changing blazwds the course of its reuse it always makes sense to cache it.
Getting Started with BlazeDS
Each endpoint defines a type and format of communication. Simply put, at the heart of BlazeDS is a Servlet that bootstraps the infrastructure that intercepts all calls between a Flex client and the BlazeDS instance. You can include the same robustness in BlazeDS as well. Translation of AS3 objects sent by a Flex application to guiee Java objects for passing them in as method call arguments.
Learn about Adobe’s tool for coupling together Flash platform-based interfaces with robust Java enterprise servers.
In the newly created tutorial-chat project, open the main. One is needed for the streamed response from guode server to the client that the channel hangs on to. Adapters make it possible to hook-up specific server side entities.
For example a service class configured as a Spring Bean as follows: The BlazeDS turnkey server is a ready-to-use version of Tomcat currently version 6. To work with typed objects in this application, first create the ActionScript version of the Product class created in step 1: Building a messaging application.
Inspired by Actual Events: Bare Bones BlazeDS HTTPService Example
Define the ProductDAO class as follows: In a Spring BlazeDS server, three types of message service components can interact with the Flex message service. Therefore, message producers connected to a blazfds server instance can send messages to message consumers connected to a different server within the same cluster.
Besides, remoting the Spring messaging and security benefits also get extended to Flex applications. Resource Pooling Many of these external systems and libraries, such as messaging infrastructure, database connections and stateless business services, lend themselves to pooling.
Getting started with BlazeDS
A channel can be configured as follows: To start the sample database: HTTP request-response Web services Remote procedure calls involving objects A possible demoting configuration could be as follows: There are several ways you can set up Eclipse to work on the Java classes of a Web application.
Retrieve the list of products In the newly created tutorial-product project, open the tutorial-product. In the blazeds-server project, open messaging-config. Messaging systems involve two typical messaging domains: For high frequency updates this configuration has the overhead of a poll roundtrip for every pushed message and therefore messages can be queued between polls.