Re: T4 - access hivemind registry from another servlet

[Jili Lv]

1. Add a filter class :

package com.example;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.apache.hivemind.Registry;

public class HivemindRegistryPublishFilter implements Filter {

        private FilterConfig config;
        
        static public Registry  getRegistry() {
                return _localRegistry.get();
        }
        
        public void init(FilterConfig config) throws ServletException {
                this.config = config;
        }

        public void destroy() {
        }
        
        public void doFilter(ServletRequest request, ServletResponse
response, FilterChain chain)
                throws IOException, ServletException {
                try
                {
                        // tapestry 4.1.2 servlet name is xxx.
                        
_localRegistry.set((Registry)config.getServletContext().getAttribute("org.apache.tapestry.Registry:"
+ "xxx"));
                        chain.doFilter(request, response);
                } finally {
                        _localRegistry.set(null);
                }
        }
        
        static protected ThreadLocal<Registry>  _localRegistry = new
ThreadLocal<Registry>();
}

2. configure web.xml

        <filter>
                <filter-name>registryFilter</filter-name>
                
<filter-class>com.example.HivemindRegistryPublishFilter</filter-class>
        </filter>
        <filter-mapping>
                <filter-name>registryFilter</filter-name>
                <url-pattern>/*</url-pattern>
        </filter-mapping>

3. now get Registry use com.example.HivemindRegistryPublishFilter.getRegistry()

this is base on the hivetranse source code
http://hivetranse.sourceforge.net/

2007/11/15, Paul Stanton <[EMAIL PROTECTED]>:
> Ok, so the tapestry servlet initializes and stores the hivemind registry
> for use within tapestry. My hivemind services and tapestry components
> and pages can find each other via injection or context method calls.
> That's fine, but now I've got separate servlet in which I need to have
> access to my hivemind services. What's the best way to do this?
>
> Thanks, Paul.
>
>
>
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