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Struts 2.0.0

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Action 2.0.0 will be is the first release distribution of WebWork 2 as an Apache Struts product.

• If you are a Maven user, you might want to get started using the Maven Archetype.
• Another quick-start entry point is the blank application. Rename and deploy the WAR as a starting point for your own development.

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WebWork 2.2.2 Release Notes

WebWork 2.2.2 is a bugfix release, with minor improvements, mostly related to the view layer(s). Migration from 2.2.2 should be trivial, with one caveat for the param tag.
WebWork 2.2.2 is the final release under the Opensymphony umbrella. WebWork is now moving to the Apache group and will serve as basis for the new Struts Action 2.0 which is scheduled for August 2006.

Key Changes

Portlets

• Portlet tests added, logging and url fixed
• Added support for Velocity

Validation

• Improved Client Side Validation

UI and Views

• New and improved components: Submit now supporting image and html button flavours, Reset, RichTextEditor, url, Date, Token
• Various components now have tooltip support
• Freemarker and Velocity bugfixes
• Better integration with SiteMesh for Freemarker and JSTL
• Various bug fixes for the xhtml and ajax theme
• Added support for using Tiles
• Support for new Plaintext Result type

Tools

• Quickstart OSX problems fixed

Miscellaneous

• Updated and improved documentation, including new Getting Started pages and Portlet Tutorial
• Updated test coverage

Changelog

For a complete list of all the changes, please refer to the complete changelog

Known Issues

XSL Result is known to have issues with Java 5.0.

Known Issues

• For known issues, see Struts 2.0.1

Key Snippets

Maven Artifact ID

<dependency>
  <groupId>org.apache.struts</groupId>
    <artifactId>struts2-core</artifactId>
      <version>2.0.0</version>
</dependency>

Struts Configuration XML

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
  "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
  "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <include file="struts-default.xml"/>
    <package name="support" extends="struts-default">
        <action name="$name" class="$class">
            <result>$location</result>
        </action>
    </package>
</struts>

XWork Validation XML

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC 
   "-//OpenSymphony Group//XWork Validator 1.0.2//EN" 
   "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
<validators>
    <field name="$name">
        <field-validator type="$type">
            <message>$message</message>
        </field-validator>
    </field>
</validators>

New Features and Extensions

• Can we use Acegi Security with the framework extension is available.
• CheckBox Interceptor detects unchecked checkboxes and adds a parameter with a default value (usually 'false') .
• JavaServer Faces extension is available.
• A struts.xml file can be placed in a JAR and automatically plugged into an application, so that modules can be self-contained and automatically configured.
  • In the case of Freemarker and Velocity modules, the templates can also be loaded from the classpath, so the entire module can be plugged in as a single JAR.
• DebuggingInterceptor displays the value stack at runtime.

Key Changes

Depending on whether you are coming from a Struts 1 or a WebWork 2 background, your perspective on the key changes will differ.

From Struts 1

• See Comparing Struts 1 and 2
• More notes to come ...

From WebWork 2

• Struts 2 is dependant on XWork 2 (nightly build).
• Java 1.5 is required to build and deploy Struts 2.
  • For Java 1.4 deployments, RetroWeaver or RetroTranslater may be used to provide Java 1.4 support
  • A pre-packaged set of RetroTranslator JARs is being provided with the distribution.

For other changes from WebWork 2, see the "Members to rename", "New property settings", "New features or feature changes", and "Removed or deprecated".

Members to rename

The tag prefix conventions in the example applications have changed.

New property settings

New features and feature changes

• Various changes to ConfigurationManager
  • ConfigurationManager is no longer a static factory. It is now an instance created through Dispatcher. Custom configuration could be done through DispatcherListener.
  • Custom configuration to ConfigurationManager and Configuration cannot be done statically anymore, instead use Dispatcher's DispatcherListener to achieve the same effect.
• The prepare interceptor now uses reflection to call prepare_Method_ where method is the action method configured for the particular action in struts.xml.

  Code Block
  <action name="myAction" method="insert" ....> ..... </action> // with the above configuration, and PrepareInterceptor in play, // callsequence will be 1] prepareInsert() (If it exists) 2] prepare() (Unless Interceptor's alwaysInvokePrepare parameter is set to false) 3] insert()

• DefaultWorkflowInterceptor (named workflow in struts-default.xml) now uses reflection to call validateMethod on the action class that implements Validateable interface where method is the action method configured for the particular action in struts.xml.

  Code Block
  <action name="myAction" method="insert" ...> ... </action> // with the above configuration, and DefaultWorkflowInterceptor in play, // call sequence for action that implements Validateable interface will be 1] validateInsert() 2] validate() (unless Interceptor's alwaysInvokeValidate parameter is set to false) 3] insert()

• Datepicker tag is now using dojo's (limited in terms functionality and internationalization)
• Tiles integration extension is available.
• Wildcards can be specified in action mappings.
• MessageStoreInterceptor is introduced to allow field errors / action errors and messages to be store and retrieve through session, resulting them to be preservable across request.

Removed or deprecated

 <s:textarea theme="ajax" /> 

  <action name="..." method="submit">
    ...
  </action>

Detail

• Release Notes (to date)

Pending and open issues

Other resources

• Commit Logs (Struts 1 and Struts 2)
• Source Code Repository (includes change browsing)