How to invoke Java methods from Flex application?

1. Add an mapping to the Java class to services-config.xml
2. Map your RemoteObject (provided with Flex SDK) on the client side to the destination configured in services-config.xml
3. Invoke the method in your Java class using the RemoteObject instance

What do you need to invoke a Java method from the client side application?

1. Flex Builder
2. Blaze DS

Isn’t that simple? Let’s get into details of implementing this.

Set up Blaze DS

Download and setup Blaze DS on your system fromhttp://labs.adobe.com/technologies/blazeds/

You will be downloading Blaze DS with integrated Tomcat server. You just have to start the server by executing startup.bat under tomcat/bin. Please note the port number in which the Tomcat server is running. The port number mentioned below might have to be replaced with yours, if required. Read more…

• Getting URL Parameters in Flex Actionscript
• Exception Handling with Flex
• Creating a simple image gallery with the Flex TileList control
• Add FlexComponents to your mailing lists!
• Great Ways to Learn ActionScript 3 in Flash
• How to Learn Flex

Get the full url with the host name and port in actionscript?

There are several methods to help with this:

getHostName()
getPort()
getProtocol() -such as http or https
getContext() -The path after the hostname but before the url parameters

• Exception Handling with Flex
• Creating a simple image gallery with the Flex TileList control
• learn Flex Application Frameworks
• Flex Tutorial
• Data Push from Servers to Client
• flex Handling Events
• Flex 2.0 Basics
• Add FlexComponents to your mailing lists!
• Great Ways to Learn ActionScript 3 in Flash
• How to Learn Flex

A common hurdle a developer may face is dealing with exceptions in BlazeDS. When an exception is thrown in Java, how do we handle this in flex? Here is a simple and flexible approach inspired by Scott Morgan.

1. Create a Java Class that extends RuntimeException.

package com.flexpasta.exception;
public class FlexException extends RuntimeException
{
public FlexException(String message)
{
super(message);
}
}

Read more…

• Creating a simple image gallery with the Flex TileList control
• Getting URL Parameters in Flex Actionscript
• learn Flex Application Frameworks
• Flex 2.0 Basics
• Data Push from Servers to Client
• flex Handling Events
• Learn Ruby on Rails with ‘Up and Running’
• Add FlexComponents to your mailing lists!
• Great Ways to Learn ActionScript 3 in Flash
• How to Learn Flex