目前在做JBoss下布署String2.5 & Struts2集成的工程，在工程中用Spring2.5 的component scan, Struts2 的convention 和 rest plugins。在JBoss下部署都有問題：

Spring 2.5 component scan所有annotation標注的component都無法找到。原因是JBoss用了VFS，所以在Spring中找不到。
解 決方法：使用jboss的 spring-int-vfs 中提供的 org.jboss.spring.vfs.context.VFSClassPathXmlApplicationContext。這個包可以在 http://sourceforge.net/projects/jboss/files/JBoss-Spring%20Integration/
下載到，在頁面中部，可以找到JBoss-Spring Integration。下面是我的一段代碼：

??????????????? ApplicationContext appContext = null;
??????? switch(serverType) {

??????? case tomcat:

??????????? appContext = new ClassPathXmlApplicationContext(configFiles);

??????????? break;

??????? case jboss:

??????????? appContext = new VFSClassPathXmlApplicationContext(configFiles);

??????????? break;

??????? }





Struts2 convention, 原因也是JBoss用了VFS，于是URL的protocol都變成了vfsfile, vfszip等等。查看xword的源碼，在類com.opensymphony.xwork2.util.finder.ClassFinder的 122行左右，里面是寫死的，"jar".equals(location.getProtocol(),? "file".equals(location.getProtocol()。
解決方法：由于不能影響到非jboss server，如tomcat，所以不好改寫ClassFinder。采用改寫struts2 convention插件的方案，替換org.apache.struts2.convention.ActionConfigBuilder如下：

File: src/plugins/convention/src/main/resources/struts-plugin.xml

<bean type="org.apache.struts2.convention.ActionConfigBuilder" class="com.playphone.struts.convention.MyActionConfigBuilder"/>


MyActionConfigBuilder類的內容如下，這里只是簡單的解析WEB-INF/classes下的類，因為我沒用到jar包需要被認為action的情況，所以簡化。



package com.playphone.struts.convention;



import java.net.MalformedURLException;

import java.net.URL;

import java.util.ArrayList;

import java.util.HashSet;

import java.util.List;

import java.util.Set;



import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.struts2.convention.ActionNameBuilder;

import org.apache.struts2.convention.InterceptorMapBuilder;

import org.apache.struts2.convention.PackageBasedActionConfigBuilder;

import org.apache.struts2.convention.ResultMapBuilder;

import org.apache.struts2.convention.StringTools;



import com.opensymphony.xwork2.ObjectFactory;

import com.opensymphony.xwork2.config.Configuration;

import com.opensymphony.xwork2.inject.Inject;

import com.opensymphony.xwork2.util.finder.ClassFinder;

import com.opensymphony.xwork2.util.finder.Test;



import com.playphone.spring.EnvVariable;

import com.playphone.spring.ServerType;



/**

* Solve the problem that could not found action under JBoss.

*

* @author <a href="mailto:sunyi4j@gmail.com">Roy</a> on Jul 6, 2009

*/

public class MyActionConfigBuilder extends PackageBasedActionConfigBuilder {

private static Log log = LogFactory.getLog(MyActionConfigBuilder.class);



private static final String BASE_FILE = "appContext.xml";



??? private String[] actionPackages;

??? private String[] packageLocators;



/**

???? * Constructs actions based on a list of packages.

???? *

???? * @param configuration???????? The XWork configuration that the new package configs and action configs

???? *????????????????????????????? are added to.

???? * @param actionNameBuilder???? The action name builder used to convert action class names to action

???? *????????????????????????????? names.

???? * @param resultMapBuilder????? The result map builder used to create ResultConfig mappings for each

???? *????????????????????????????? action.

???? * @param interceptorMapBuilder The interceptor map builder used to create InterceptorConfig mappings for each

???? *????????????????????????????? action.

???? * @param objectFactory???????? The ObjectFactory used to create the actions and such.

???? * @param redirectToSlash?????? A boolean parameter that controls whether or not this will create an

???? *????????????????????????????? action for indexes. If this is set to true, index actions are not created because

???? *????????????????????????????? the unknown handler will redirect from /foo to /foo/. The only action that is created

???? *????????????????????????????? is to the empty action in the namespace (e.g. the namespace /foo and the action "").

???? * @param defaultParentPackage? The default parent package for all the configuration.

???? */

??? @Inject

??? public MyActionConfigBuilder(

??????????? Configuration configuration,

??????????? ActionNameBuilder actionNameBuilder,

??????????? ResultMapBuilder resultMapBuilder,

??????????? InterceptorMapBuilder interceptorMapBuilder,

??????????? ObjectFactory objectFactory,

??????????????????????????????????? @Inject("struts.convention.redirect.to.slash") String redirectToSlash,

??????????????????????????????????? @Inject("struts.convention.default.parent.package") String defaultParentPackage) {

???? super(

?????? configuration,

?????? actionNameBuilder,

?????? resultMapBuilder,

?????? interceptorMapBuilder,

?????? objectFactory,

?????? redirectToSlash,

?????? defaultParentPackage);

??? }

???

??? /**

???? * @param actionPackages (Optional) An optional list of action packages that this should create

???? *?????????????????????? configuration for.

???? */

??? @Inject(value = "struts.convention.action.packages", required = false)

??? public void setActionPackages(String actionPackages) {

???? super.setActionPackages(actionPackages);

??????? if (!StringTools.isTrimmedEmpty(actionPackages)) {

??????????? this.actionPackages = actionPackages.split("//s*[,]//s*");

??????? }

??? }



??? /**

???? * @param packageLocators (Optional) A list of names used to find action packages.

???? */

??? @Inject(value = "struts.convention.package.locators", required = false)

??? public void setPackageLocators(String packageLocators) {

???? super.setPackageLocators(packageLocators);

??????? this.packageLocators = packageLocators.split("//s*[,]//s*");

??? }



??? @Override

@SuppressWarnings("unchecked")

protected Set<Class> findActions() {

? if(EnvVariable.getServerType() == ServerType.tomcat) {

?? return super.findActions();

? } else {

?? Set<Class> classes = new HashSet<Class>();

?? try {

??? ClassFinder finder = new ClassFinder(getClassLoaderForFinder(), buildUrls(), true);



??? // named packages

??? if (actionPackages != null) {

???? for (String packageName : actionPackages) {

????? Test<ClassFinder.ClassInfo> test = getPackageFinderTest(packageName);

????? classes.addAll(finder.findClasses(test));

???? }

??? }



??? // package locators

??? if (packageLocators != null) {

???? for (String packageLocator : packageLocators) {

????? Test<ClassFinder.ClassInfo> test = getPackageLocatorTest(packageLocator);

????? classes.addAll(finder.findClasses(test));

???? }

??? }

?? } catch (Exception ex) {

??? if (log.isErrorEnabled()) {

???? log.error("Unable to scan named packages", ex);

??? }

?? }



?? return classes;

? }

}



??? private List<URL> buildUrls() throws MalformedURLException {

? List<URL> urls = new ArrayList<URL>();



? URL classesUrl = getClassLoader().getResource(BASE_FILE);

? if(classesUrl == null) {

?? throw new IllegalStateException("File appContext.xml was not found. The folder WEB-INF/classes discovery base on file classes/appContext.xml.");

? }



? String baseFilePath = classesUrl.getFile();

? URL url = new URL("file", "", baseFilePath.substring(0, baseFilePath.indexOf(BASE_FILE)));

? if (log.isInfoEnabled()) {

?? log.info("Struts2 ActionConfigBuilder, classes directory: " + url.getFile());

? }

?

? urls.add(url);

? return urls;

}

???

??? private ClassLoader getClassLoader() {

???? return Thread.currentThread().getContextClassLoader();

??? }

???

}







為了調試方便，可以打開org.apache.struts2.convention log level為debug，然后你就可以清晰地看到哪些action被認出來了。

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