albert's blog

You use the Java EE 6 Web Profile, and don´t need to pack your application into an EAR file.
You code your domain model using a xml-less ORM fram framework (JPA). JPA actually makes sense and does what its supposed todo without fuss.
You let your JPA implementation generate your database schema for you, which it does with surprising efficiency.
You use modern, component-based view frameworks (like Facelets or Wicket) , and get by writing little or no XML for defining navigation (remember struts-config.xml?)
You use annotations everywhere (your JPA entities, your Session Beans, your Servlets) and even start to forget XML syntax
You don´t bother writing deployment descriptors for all your session beans. You just add one annotation to any POJO and it automatically gains EJB powers.
You only write Remote Interfaces when you actually needs a component to be remotely accessible.
You have no idea what CORBA is.
You have a vague idea of what JNDI is, but you use dependency injection everywhere to get what you need.
You develop using a lightweight application server (glassfish 3) that redeploys your application in seconds every time you make a change. Most of the time you don't even notice it.

http://weblogs.java.net/blog/jjviana/archive/2010/02/26/java-enterprise-development-2010-style

2010/02/28

Utilize Flex And Java Servlet To Implement File Upload

Check out this SlideShare Presentation:

Utilize Flex And Java Servlet To Implement File Upload

View more presentations from Guo Albert.

2010/02/19

Apply AutoComplete component in Flex

Go to here to download AutoComplete Component: http://hillelcoren.com/flex-autocomplete/

Here has its demo: http://web.me.com/hillelcoren/Site/Demo.html

After you download its zip file, extract it and you can find out AdvancedAutoComplete-1.0.swc in bin directory.

Add SWC file into Flex Build Path

Create a value object, which called "People".

This value object contains three attributes, including name, gender and mail.

package vo

{

public class People

{

public function People(iName:String, iGender:String, iMail:String)

{

name = iName;

gender = iGender;

mail = iMail;

}

public var name:String;

public var gender:String;

public var mail:String;

}

Create a new MXML Application file, which called "AutocompleteTest".

Click "Finish"

Add a new namespace for this AutoComplete Component

<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"

xmlns:components="com.hillelcoren.components.*"

layout="absolute" >

</mx:Application>

Declare an ArrayCollection variable for AutoComplete component as its data provider.

And add value object, People, into this ArrayCollection as page load.

Use AutoComplete tag to realize auto complete function.

<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"

xmlns:components="com.hillelcoren.components.*"

layout="absolute" initialize="init()">

<mx:Script>

<![CDATA[

import vo.People;

import mx.collections.ArrayCollection;

//declare an ArrayCollection as AutoComplete component's data provider

[Bindable]

private var peopleList:ArrayCollection = new ArrayCollection();

//set data into people list as page load

private function init():void{

peopleList.addItem(new People("Albert", "Male", "albert@gmail.com"));

peopleList.addItem(new People("Mandy", "Female", "mandy@gmail.com"));

peopleList.addItem(new People("Verio", "Male", "verio@gmail.com"));

peopleList.addItem(new People("Richard", "Male", "richard@gmail.com"));

peopleList.addItem(new People("Andrew", "Male", "andrew@gmail.com"));

}

]]>

</mx:Script>

<mx:HBox>

<mx:Label text="Name" />

<components:AutoComplete id="autoComplete" labelField="name" dataProvider="{peopleList}" />

</mx:HBox>

</mx:Application>

Demo

As I type in "A", it will show some options for me to select.

As I select "Albert", then it will show my selection in the text field.

2010/02/05

Building The SpringGraph Flex Component

Check out this SlideShare Presentation:

Building The SpringGraph Flex Component

View more presentations from Guo Albert.

2010/02/02

Integrate Flex With Spring Framework

Check out this SlideShare Presentation:

Integrate Flex With Spring Framework

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2010/02/01

Access Net Web Services From Java

Check out this SlideShare Presentation:

Access Net Web Services From Java

View more presentations from Guo Albert.

2010/01/29

Access .Net Web Services via Java Web Services Client

Scenario

Implementation Steps

Create a simple web service via Visual Studio 2008

1. Choose ASP.Net Web Srvice Application

2. Write a HelloWorld method which accept one String paramter, and will return "Hello~"+name.

As you run this asmx file, you will see this page:

If I filled in Albert and submit. I will get "Hello~Albert" in the next page.

You can use this link (http://localhost:3936/Service1.asmx?wsdl) to get its WSDL page.

Build Java client via Eclipse

1. Create a Dynamic Web Project

2. Given a project name and set target runtime. Click Next.

3. Click Next

4. Click Finish. Then you had finished the Dynamic Web Project creation.

5. Create a Web Service Client.

6. Fill in WSDL url link and click Next.

7. Click Finish.

8. Then Eclipse will create these Java classes automatically. (Except TestClient.java)

9. Create a standalone Java

10. Make good use of the proxy class which generate by eclipse automatically.

Run this Java class we mentioned above, you can see "helloMsg=Hello~Albert Guo" in your Eclipse console

2010/01/21

Flex Plug-in for Eclipse

Please go to here to download installation file: http://www.adobe.com/cfusion/entitlement/index.cfm?e=flex3email

you can see this download page:

Click the installation file, and you will see this welcome page

click Next

Select "I agree...." and click next

Click next

Choose your eclipse path

Click Next

Click Install

Click Done to finish your installation

Then open your eclipse, and you will see the Flex Builder option in your wizard. Click Next

Call this project as "FlexTest", and click next.

Click next.

After FlexTest project had been created, you will see this project in your workspace.

In the FlexTest.mxml, we wrote a simple function to show "Hello Flex" message as user click the button.

DONE....

2010/01/20

How many jar files you need to integrate Flex with Spring Framework + Hibernate?

Here is the list:

backport-util-concurrent.jar
cfgatewayadapter.jar
cglib-nodep.jar
cglib.jar
commons-codec-1.3.jar
commons-collections.jar
commons-dbcp-1.2.2.jar
commons-httpclient-3.0.1.jar
commons-logging.jar
commons-pool-1.5.4.jar
concurrent.jar
dom4j.jar
flex-messaging-common.jar
flex-messaging-core.jar
flex-messaging-opt.jar
flex-messaging-proxy.jar
flex-messaging-remoting.jar
hibernate3.jar
jackson-core-lgpl-1.1.0.jar
jackson-mapper-lgpl-1.1.0.jar
jta.jar
log4j.jar
org.springframework.flex-1.0.1.RELEASE.jar
slf4j-api.jar
slf4j-log4j12.jar
spring-beans.jar
spring-web.jar
spring-webmvc.jar
spring.jar
xalan.jar

Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/flex]

Problem

As I integrated flex with spring framework, I got this error message when I start apache tomcat:

1:  2010/1/20 下午 04:25:59 org.apache.catalina.core.ApplicationContext log  
2:  資訊: Initializing Spring FrameworkServlet 'spring-flex'  
3:  2010/1/20 下午 04:26:00 org.apache.catalina.core.ApplicationContext log  
4:  嚴重的: StandardWrapper.Throwable  
5:  org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/flex]  
6:  Offending resource: ServletContext resource [/WEB-INF/flex-servlet-context.xml]  
7:   at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68)  
8:   at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85)

Solution

This error resulted from I forgot to copy flex-spring integration jar file into WebContent/WEB-INF/lib, you can go to here to download this jar file: http://www.springsource.org/spring-flex

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