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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Adapters are also configured in services-config.
The other three are as follows:. The configuration file services-config.
BlazeDS is capable of serializing and transforming Java-based objects to their AS3 counterparts so that may make you wonder why wiring up JPA and Hibernate entities and their collections needs any special handling. Similarly, in the next step, the instance of the ActionScript Product class passed as an argument to the update method of the RemoteObject is deserialized into an instance of the Java version of the Product class at the server-side.
BlazeDS – Wikipedia
It attempts to illustrate some of the most important features of the software and therefore blazesd as a starting point for developers who are interested in the subject. Add a destination called tutorial-chat defined as follows: Therefore both its behavioral and structural aspects are tersely listed in this section.
During serialization, the serializer eagerly fetches all the JPA and Hibernate persistent objects and sends them across the wire. You can download Eclipse at: Add event handlers to improve the application RemoteObject calls are asynchronous.
To subscribe to a destination, you use the ugide method of the Consumer class. When an incoming or outgoing message hits the filter, serialization and deserialization occur. In this tutorial, to avoid dependencies on a specific plug-in, we use a simple Java project.
Non-blocking channels allow for greater number of connections to be served provided they are not all active at the same time always. Create the remoting destination A Remoting destination exposes huide Java class that your Flex application can invoke remotely.
Getting started with BlazeDS | Adobe Developer Connection
Only a couple of quick examples are bkazeds to give you a flavor the typical configuration elements. Select J2EE as the application server type. Define the ProductDAO class as follows: Retrieve the list of products In the newly created tutorial-product project, open the tutorial-product.
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. BlazeDS has a set of guied where a Flex application channel sends requests up to BlazeDS that resides within a Servlet container or an application server.
Number; public var qty: Each endpoint defines a type and format of communication. Being open source, BlazeDS is freely available and can be downloaded from http: Ensure Use default location is selected. Explaining every bit of the configuration is beyond the scope blaezds this Refcard and is therefore not included.
Clustering Clustered instances of BlazeDS share data and messages across instances. The ActionScriptAdapter helps route messages between Flex clients via the server.
The top level and the first of these four is services-config. Analogously, the Flex client defines a set of channels that vary depending on the type and format of communication. With the help of this project it becomes easy to configure Spring Beans as server side remoting counterparts of Flex clients. 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.
Learn about Adobe’s tool for coupling together Flash platform-based interfaces with robust Java enterprise servers. The reason for this special need arises because of the way BlazeDS serializes data across blszeds wire. Notice that there blazedss no need to explicitly define a channel for the tutorial-chat destination. When you do not specify channels at the destination level, the destination uses the default channels defined at the top of the messaging-config.
Prior to the existence of this project developers relied on custom factories to integrate Spring and BlazeDS.
Caching is a timetested way of increasing performance by avoiding data fetches across the network and using pre-fetched local data instead.
Translation of AS3 objects sent by a Flex application to corresponding Java objects for passing them in as method call arguments. It’s not scalable though, as it blocks connections. The three alternative serverside message services in Spring BlazeDS are: BlazeDS has acces to all resource pooling strategies that any Java EE web application running in an application server has.
Workload distribution Distributing work optimally between a client and its server is an important challenge when architecting RIA. If the accessed data is not changing guixe the course of its reuse it always makes sense to cache it.
Near real-time message passing between a Flex application and a Java server. The client sends a recurring request to the server at a predefined frequency.
RemoteObject calls are asynchronous. In addition, one of the binary versions comes in the form of bblazeds turnkey distribution that includes a configured copy of the Apache Tomcat Servlet container within the bundle. A key guude of a destination is gyide channel used to exchange data between the client and the server. To make the application more robust and better partitioned, modify the code as follows:.
Getting started with BlazeDS
When a message is published to a destination you subscribed to, blaezds message event is triggered on the Consumer. BlazeDS does not include Java NIO implementations for its communication channels but it’s not very difficult to include one. PDF for easy Reference. Can easily be used as a remoting destination simply by specifying a configuration as follows:. Concurrent contracts Cross-domain utility layer Functional decomposition Rules centralization State repository Caching If the b,azeds data is not changing during the course of its reuse it always makes sense to cache it.