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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Getting started with BlazeDS
This breaks the lazy loading semantics, rendering the idea of proxies useless. Matching endpoints and channels are paired, and that’s when a Flex client and BlazeDS server talk to each other. Extending the scope of these frameworks to include interactions with Flex clients allows seamless persistence management. BlazeDS based message services leverage two types of built-in adapters, namely: Channels and endpoints connect blzaeds Flex client to a BlazeDS server.
Run and test the application. Java objects returned by server-side methods are deserialized into either dynamic or typed ActionScript objects. 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.
Create the value object In the application so far, the list of products returned by the getProducts method is deserialized into dynamic objects. Guidde order to zip the data transferred from vuide server to the client, a filter can be created to manipulate and compress the outgoing response. Concurrent contracts Cross-domain utility layer Functional decomposition Rules centralization State repository Caching If the accessed data is not changing during the course of its reuse it always makes sense to cache it.
Program that intercepts all communication between a Flash Player and a Java server. BlazeDS can logically support both messaging domains.
Inspired by Actual Events: Bare Bones BlazeDS HTTPService Example
There are several ways you can set up Eclipse to work on the Java classes of a Web application. BlazeDS is a set of data services that significantly simplify the development of data-driven Rich Internet Applications, and dramatically improve the performance of their data access operations.
You can skip this step if Eclipse and the Flex Builder 3 plug-in are already installed on your system. When resources are pooled, they are shared over multiple clients.
Only a couple of quick examples are shown to give you a flavor the typical configuration elements.
They are the primary components that enable communication between these two entities. When a message is published to a destination you subscribed to, the message event is triggered on the Consumer.
Adapters are also configured blaazeds services-config. When an incoming or outgoing message hits the filter, serialization and deserialization occur. Define the ProductDAO class as follows: The other three are as follows:. The blazzeds sections include a few more in context configuration illustrations. This Refcard provides a quick overview of BlazeDS. BlazeDS has a set of endpoints where a Flex application channel sends requests up to BlazeDS that resides within a Servlet container or an application server.
Java web application that leverages the Java Servlets specification.
Getting started with BlazeDS | Adobe Developer Connection
A polling channel can be configured with a polling interval, or it can be set up to wait for data at the server-side if data is not immediately available this approach is generally referred to as long polling. Among others, the BlazeDS proxy capabilities have three important use cases including: In your real-life development or production environment, you would typically integrate BlazeDS in your own web application on your own application server. Update products Modify the tutorial-product.
Near real-time message passing between a Flex application and a Java server. Using BlazeDS’s demoting you are enabled with automatic translation between the Java and ActionScript3 AS3 bpazeds types, marshaling, un-marshalling, serialization and deserialization across the endpoints and channels.
Getting Started with BlazeDS
The method can return a value of a primitive data type, an object, a collection of objects, an object graph, and more. AMF3 facilitates a very efficient way of binary transmission of data between the server and the client. During serialization, the serializer eagerly fetches all the JPA and Hibernate persistent objects and sends them across the wire.
Ensure Use default location is selected. Data Format Optimization AMF3 facilitates a very efficient way of binary transmission of data between the server and the client. The client sends a recurring request to the server boazeds a predefined frequency. Product” ] annotation to map the ActionScript version of the Product class Product. When you do not specify channels at the destination level, the destination uses the default channels giude at the top of the messaging-config.
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. Its inclusion into future versions of BlazeDS is anticipated.
Create a Java project You will need a Java project to work on the server side of the applications built in this tutorial.
The reason for this special need arises because of the way BlazeDS serializes data across the wire.
To make the application blaezds robust and better partitioned, modify the code as follows:. Off the shelf, the Flex framework includes three methods of pull-based communication and data interchange with external data sources:. Explaining every bit of the configuration is beyond the scope of this Refcard and is therefore not included.