RE: [Axis] Load Web Service on Startup

Bell, Douglas Thu, 27 Jul 2006 13:57:49 -0700

Hi Ronak,

I'm unaware of anyway to force initialization via configuration. I do it with a startup servlet that calls the services constructor using reflection based on parameters passed in as init-params.

If anyone knows a better way please share, this seems hacky to me.

- Doug

import java.util.List;
import java.util.Arrays;
import java.util.Iterator;

import java.lang.reflect.InvocationTargetException;

import java.io.IOException;

import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.apache.log4j.Logger;

/**
* Title: StartAxisEngine.java 
* Description: Configured to 'load-on-startup' in the axis server's web.xml,
* StartAxisEngine calls the constructor for the SOAP service
* to initialize the axis engine. An init-param 'serviceName' with
* a comma separated list of service names to start is required to
* be in the web.xml:
* <init-param>
* <param-name>serviceName</param-name>
* <param-value>your.package.name.YourSoapService, another.package.name.AnotherSoapService</param-value>
* </init-param>
* note: since this servlet is not meant to answer http requests
* only the Servlet interface is used (not HttpServlet) by design.
* 
*
* $Date: 2005/04/26 17:16:37 $
* $Author: dbell $
* $Revision: 1.6 $
*
*
*/
public class StartAxisEngine implements Servlet
{

/** ServletConfig servletConfig */
private ServletConfig servletConfig;

/** Logger log */
private static Logger log = Logger.getLogger(StartAxisEngine.class);

/**
* Default Constructor
*/
public StartAxisEngine()
{
 super();
}

/*
* (non-Javadoc)
* @see javax.servlet.Servlet#init(javax.servlet.ServletConfig)
*/
public void init(ServletConfig config)
throws ServletException
{
 //Set servletConfig
 this.servletConfig = config;

 //get the list of service to start for this webapp context
 List<String> list = Arrays.asList(config.getInitParameter("serviceName").split(","));

 //Iterate over the list of service using Reflection to instantiate each service
 for(Iterator<String> itr = list.iterator(); itr.hasNext();)
 {
 String c = itr.next().trim();

   try
   {
    if (c != null)
    {
     Object service = Class.forName(c).getConstructor(
       (Class[])null).newInstance((Object[])null);
    }
   }
   catch(ClassNotFoundException e)
   {
    log.error(e);
    continue;
   }
   catch(NoSuchMethodException e)
   {
    log.error(e);
    continue;
   }
   catch(InstantiationException e)
   {
    log.error(e);
    continue;
   }
   catch(IllegalAccessException e)
   {
    log.error(e);
    continue;
   }
   catch(InvocationTargetException e)
   {
    log.error(e);
    continue;
   }
  }
}

/*
* (non-Javadoc)
* @see javax.servlet.Servlet#getServletConfig()
*/
public ServletConfig getServletConfig()
{
  return this.servletConfig;
}

/*
* (non-Javadoc)
* @see javax.servlet.Servlet#service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
*/
public void service(ServletRequest arg0, ServletResponse arg1)
throws ServletException, IOException
{
}

/*
* (non-Javadoc)
* @see javax.servlet.Servlet#getServletInfo()
*/
public String getServletInfo()
{
  return this.servletConfig.getServletContext().getServletContextName();
}

/*
* (non-Javadoc)
* @see javax.servlet.Servlet#destroy()
*/
public void destroy()
{
}

From: Patel, Ronak (US SSA) [mailto:[EMAIL PROTECTED]
Sent: Thursday, July 27, 2006 11:56 AM
To: axis-user@ws.apache.org
Subject: RE: [Axis] Load Web Service on Startup

Hello All,

I am interested in finding out how I can force Apache Axis to load and run my Web Service (by calling it’s init() method) when the Web Server starts.

Is there a configuration parameter that I need to set somewhere?

I am interested in finding this out in both Axis2 and Axis1.x.

Any help would be greatly appreciated.

Ronak Patel

Software Engineer

BAE Systems CNIR

450 Pulaski Road

Greenlawn, NY 11740

(631) 262 - 8230

[EMAIL PROTECTED]

RE: [Axis] Load Web Service on Startup

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