HttpInvoker without web container?

[mark_in_gr]

I just got it working today in fact. Here is my jetty xml context/web app context portions:

<bean id="contexts"
                              class="org.mortbay.jetty.handler.ContextHandlerCollection">
                            <property name="handlers">
                                <list>
                                    <bean class="org.mortbay.jetty.webapp.WebAppContext">
                                        <property name="contextPath"value="/"/>                                        
                                            <property name="war" value="/webapps/app.war"/>
                                    </bean>

I am having another problem now related to Serialization using HttpInvoker. I have an object which itself contains a set of other objects. These other objects have primitives, along w/other objects, as attributes. When attempt to serialize the entire class, I get "StreamCorruptedException Invalid Type Code:40" errors. The class in question has two primitive attributes, one an array of doubles, the other an array of ints. If I make both of these attributes transient, it works w/o the expection.

I was under the impression that primitives were automatically serialized, so I am not sure why this is occurring. Any ideas?

[mark_in_gr]

OK, heres the working example I promised........ I would zip it up an attach it, but my computer isn't playing ball. The project in this example is called timeService.

Sooooo

tomcat
    webapps
        timeService
            applicationContext.xml
            invoker-servlet.xml
            web.xml

            classes
                com/test/TimeService.class
                com/test/TimeServiceImpl.class
            lib
                spring.jar
                commons-logging-1.0.4.jar

The client will also require commons-codec.jar and commons-httpclient.jar on the classpath as well as the server prereqs.

Client

TimeServiceClient

package com.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TimeServiceClient
{
	public static void main ( String [] args )
	{
		ApplicationContext context = new ClassPathXmlApplicationContext ( "client-applicationContext.xml" );
		TimeService timeService = ( TimeService ) context.getBean ( "timeService" );
		System.out.println ( timeService.getDate () );
		sleepPlease ();
		System.out.println ( timeService.getDate () );
	}
	
	private static void sleepPlease ()
	{
		try
		{
			Thread.sleep ( 5000 );
		}
		catch ( InterruptedException e )
		{
			// ignore
		}
	}
}

client-applicationContext.xml

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

<beans xmlns="http://www.springframework.org/schema/beans"
	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
     
    <bean id="httpInvokerRequestExecutor" class="org.springframework.remoting.httpinvoker.CommonsHttpInvokerRequestExecutor"/>

    <bean id="timeService" class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
		<property name="serviceUrl" value="http://localhost:8080/timeService/invoker/timeService"/>
		<property name="serviceInterface" value="com.test.TimeService"/>
        <property name="httpInvokerRequestExecutor">
            <ref bean="httpInvokerRequestExecutor"/>
        </property>
    </bean>
    
</beans>

Server

TimeService

package com.test;

import java.util.Date;

public interface TimeService
{
	Date getDate ();
}

TimeServiceImpl

package com.test;

import java.util.Date;

public class TimeServiceImpl implements TimeService
{
	public Date getDate ()
	{
		return new Date ();
	}
}

applicationContext.xml

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

<beans xmlns="http://www.springframework.org/schema/beans"
	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
       
       <bean id="timeService" class="com.test.TimeServiceImpl"/>
       
</beans>

invoker-servlet.xml

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

<beans xmlns="http://www.springframework.org/schema/beans"
	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
       
	<bean name="/timeService" class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter">
        <property name="service">
            <ref bean="timeService"/>
        </property>
        <property name="serviceInterface">
            <value>com.test.TimeService</value>
        </property>
    </bean>
    
</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC
	"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
	"http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>
	<display-name>Time Service</display-name>
	<description>Time Service</description>

	<listener>
		<listener-class>
			org.springframework.web.context.ContextLoaderListener
		</listener-class>
	</listener>

	<servlet>
		<servlet-name>invoker</servlet-name>
		<servlet-class>
			org.springframework.web.servlet.DispatcherServlet
		</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
		<servlet-name>invoker</servlet-name>
		<url-pattern>/invoker/*</url-pattern>
	</servlet-mapping>

</web-app>

Ok, here is my latest dilemna . . .

How to get your own class/interface objects to be used as arguments to the method exposed by HttpInvokerProxyFactoryBean.

It seems that if I pass a java.lang.Object to a method, it works. However, if I pass one of my own interfaces, I get a java.lang.reflect.InvocationTargetException.

Please see this post for more information:
http://forum.springframework.org/showthread.php?t=34218

This is a tough one. I have been stumped all day on it, and can't find ANYTHING close on the forums. The only thing I have seem is certain posts stating that HttpInvoker uses pass by value rather then pass by reference. Would this be a problem?

[mark_in_gr]

I just got it working today in fact. Here is my jetty xml context/web app context portions:

<bean id="contexts"
                              class="org.mortbay.jetty.handler.ContextHandlerCollection">
                            <property name="handlers">
                                <list>
                                    <bean class="org.mortbay.jetty.webapp.WebAppContext">
                                        <property name="contextPath"value="/"/>                                        
                                            <property name="war" value="/webapps/app.war"/>
                                    </bean>

I am having another problem now related to Serialization using HttpInvoker. I have an object which itself contains a set of other objects. These other objects have primitives, along w/other objects, as attributes. When attempt to serialize the entire class, I get "StreamCorruptedException Invalid Type Code:40" errors. The class in question has two primitive attributes, one an array of doubles, the other an array of ints. If I make both of these attributes transient, it works w/o the expection.

I was under the impression that primitives were automatically serialized, so I am not sure why this is occurring. Any ideas?

This error seems to be fixed in the latest 2.0.3 build(I got the one from 1/29/07)