struts2-rest plugin..making both struts actions + rest actions work together but. giving java.lang.reflect.InvocationTargetException - rest

Question

I am converting my existing struts 2 application to serve through some rest based services also.
I have used two plugins, struts2-rest plugin and struts-convention plugin,
Along with these I have also used asm.jar because above was giving a class not found exception which was there in asm jar.
I want to have both the functionalities as ..my normal struts action mappings should also work along with rest urls.
struts.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>
<!-- Overwrite Convention -->
<constant name="struts.convention.action.mapAllMatches" value="true"/>
<constant name="struts.convention.action.suffix" value="Controller"/>
<constant name="struts.convention.default.parent.package" value="rest-default"/>
<constant name="struts.mapper.class"value="org.apache.struts2.dispatcher.mapper.PrefixBasedActionMapper" />
<constant name="struts.mapper.prefixMapping" value="/rest:rest,:struts" />
<package name="userlogin" extends="struts-default" namespace="/">
<action>
......
</action>
</package>
<package name="secureAction" extends="struts-default,json-default"
namespace="/secure">
<interceptors>
...............
</interceptors>
<default-interceptor-ref name="secureStack" />
<global-results>
.............
</global-results>
<global-exception-mappings>
..............
</global-exception-mappings>
</package>
<include file=".....xml" />
</struts>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
.........
<display-name>strutsTest</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
....
</welcome-file-list>
<servlet>
<description></description>
<display-name>Logger</display-name>
<servlet-name>Logger</servlet-name>
<servlet-class>...........</servlet-class>
<init-param>
<param-name>log4j-properties-location</param-name>
<param-value>WEB-INF/log4j.properties</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Logger</servlet-name>
<url-pattern>/Logger</url-pattern>
</servlet-mapping>
I m not able to find any error..
what i see on screen when i run either struts action based mapping or rest url ..is :
Struts has detected an unhandled exception:
Messages:
com.thoughtworks.xstream.XStream
com/thoughtworks/xstream/XStream
java.lang.reflect.InvocationTargetException
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
java.lang.RuntimeException: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
java.lang.RuntimeException: java.lang.RuntimeException: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
File: org/apache/catalina/loader/WebappClassLoader.java
Line number: 1,516

Answer 1

ive solved the problem with customMapper..
this is my custom mapper class....
package org.apache.struts2.rest.example;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.dispatcher.mapper.ActionMapper;
import org.apache.struts2.dispatcher.mapper.ActionMapping;
import org.apache.struts2.dispatcher.mapper.DefaultActionMapper;
import com.opensymphony.xwork2.config.ConfigurationManager;
public class CustomActionMapper extends DefaultActionMapper {
public ActionMapping getMapping(HttpServletRequest request, ConfigurationManager configManager) {
return getActionMapper(request, configManager).getMapping(request, configManager);
}
private ActionMapper getActionMapper(HttpServletRequest request, ConfigurationManager configManager) {
ActionMapping actionMapping = new ActionMapping();
parseNameAndNamespace(request.getRequestURI(), actionMapping, configManager);
if (!(actionMapping.getNamespace()).contains("/rest")) {
return container.getInstance(ActionMapper.class, "struts");
}
else
{
return container.getInstance(ActionMapper.class, "rest");
}
}
...........................................
my struts.xml is as follows......
<?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>
<!-- Overwrite Convention -->
<bean type="org.apache.struts2.dispatcher.mapper.ActionMapper" name="myActionMapper" class="org.apache.struts2.rest.example.CustomActionMapper" />
<constant name="struts.mapper.class" value="myActionMapper" />
<constant name="struts.convention.action.suffix" value="Controller"/>
<constant name="struts.convention.action.mapAllMatches" value="true"/>
<constant name="struts.convention.default.parent.package" value="rest-default"/>
<constant name="struts.convention.package.locators" value="example"/>
<constant name="struts.action.extension" value="xhtml,,xml,json,action"/>
<!-- overwrite action complete -->
<!-- normal struts actions -->
<package name="userlogin" extends="struts-default" namespace="/">
<action name="*">
<result name="error">/view/error/error.jsp</result>
</action>
..................
</package>
<include file="..........xml" />
<include file=".............xml" />
<!-- normal stryts actions complete -->
</struts>
these are the libraries im using ..
- asm-3.1.jar
- asm-commons-3.1.jar
- commons-beanutils-1.7.0.jar
- commons-collections-3.1.jar
- commons-fileupload-1.2.2.jar
- commons-io-2.0.1.jar
- commons-lang-2.5.jar
- commons-logging-1.1.1.jar
- commons-logging-api-1.1.jar
- ezmorph-1.0.3.jar
- freemarker-2.3.16.jar
- javassist-3.11.0.GA.jar
- json-lib-2.1-jdk15.jar
- log4j-1.2.8.jar
- ognl-3.0.1.jar
- struts2-convention-plugin-2.2.3.jar
- struts2-core-2.2.3.jar
- struts2-json-plugin-2.2.3.jar
- struts2-rest-plugin-2.2.3.jar
- xpp3_min-1.1.3.4.O.jar
- xstream-1.2.2.jar
- xwork-core-2.2.3.jar
make sure you use compatible library versions....