Coherence*Web：不同 Oracle WebLogic 集群中的应用程序共享一个 httpSession

package com.beax.cohweb;

import com.tangosol.coherence.servlet.HttpSessionCollection;
import com.tangosol.coherence.servlet.HttpSessionModel;
import com.tangosol.coherence.servlet.HttpSessionCollection.SessionDistributionController;

public class CustomSessionDistributionController implements
          SessionDistributionController {

     @Override
     public void init(HttpSessionCollection arg0) {
     }

     @Override
     public boolean isSessionAttributeDistributed(HttpSessionModel arg0, String arg1) {
          // Distribute attributes starting by shared_
          return arg1.startsWith("shared_");
     }

     @Override
     public boolean isSessionDistributed(HttpSessionModel arg0) {
          // All the sessions will be distributed
          return true;
     }
}

coherence.distributioncontroller.class=com.beax.cohweb.CustomSessionDistributionController

  <context-param>
    <param-name>coherence-sessioncollection-class</param-name>
    <param-value>com.tangosol.coherence.servlet.SplitHttpSessionCollection</param-value>
  </context-param>

Storage configuration for WebLogic nodes
tangosol.coherence.session.localstorage=false
tangosol.coherence.distributed.localstorage=false
Storage configuration for Coherence Processes
tangosol.coherence.session.localstorage=true
tangosol.coherence.distributed.localstorage=true

coherence.session.optimizeModifiedSessions=false

Change this piece of the xml:
    <!--
    The clustered cache used to store Session attributes.
    -->
    <cache-mapping>
      <cache-name>session-storage</cache-name>
      <scheme-name>session-near</scheme-name>
    </cache-mapping>

To this:
    <!--
    The clustered cache used to store Session attributes.
    -->
    <cache-mapping>
      <cache-name>session-storage</cache-name>
      <scheme-name>session-distributed</scheme-name>
    </cache-mapping>

<wls:session-descriptor>
  <wls:timeout-secs>3000</wls:timeout-secs>
  <wls:cookie-name>WLS1SID</wls:cookie-name>
  <wls:cookie-path>/</wls:cookie-path>
  <!-- wls:cookie-max-age-secs>60</wls:cookie-max-age-secs> -->
  <wls:persistent-store-type>MEMORY</wls:persistent-store-type>
</wls:session-descriptor>

CODE OF THE SERVLET FILTER

package com.beax.sample.cohweb;

import java.io.IOException;
import java.util.StringTokenizer;

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 javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Servlet Filter implementation class CookieFilter
 */
public class CookieFilter implements Filter {

   public CookieFilter() {
   }

   public void destroy() {
   }

   public void doFilter(ServletRequest request, ServletResponse response, 
   FilterChain chain) throws IOException, ServletException {

      // add cookies if needed
      cookieWork(request, response);

      // pass the request along the filter chain
      chain.doFilter(request, response);
   }

   public void init(FilterConfig fConfig) throws ServletException {
   }

   /*
    * Add cookies for any related environment
    */
   private void cookieWork(ServletRequest request, ServletResponse response) 
   throws ServletException, IOException {
    String localCookieName = System.getProperty("cookie.name");
    StringTokenizer cookieList = new StringTokenizer(System.getProperty("cookie.list"), ";");
    HttpServletRequest myReq = (HttpServletRequest) request;
    HttpServletResponse myResp = (HttpServletResponse) response;

    Cookie [] cookies = myReq.getCookies();

    HttpSession ses = myReq.getSession(true);
    String sessId = ses.getId();

    String cookie_sessId = null;

    while(cookieList.hasMoreElements()) {
         boolean createCookie = true;
         String nextCookie = (String)cookieList.nextElement();
         //  
         // Only create cookies that are not created automatically by WLS. 
         //  
         if (nextCookie.equals(localCookieName)) {
            createCookie= false;
         } else {
            if (cookies != null) {
               // 
               // Check existing cookies: 
               //  - If any cookie of the "cookie.list" does not exist or 
               //    if the sessId does not match, cookie must be created.
               // 
               for(int j=0; j<cookies.length; j++) {
                  Cookie cookie = cookies[j];
                  if (cookie.getName().equals(nextCookie)) {
                     int sep = cookie.getValue().indexOf("!");
                     if (sep > 0) {
                        cookie_sessId = cookie.getValue().substring(0, sep);
                        if (sessId.startsWith(cookie_sessId)) {
                           createCookie = false;
                           break;
                        }
                     }
                  }
               }
            } else {
               // 
               // Create cookie if it does not exist
               // 
               createCookie = true;
            }
         }
         if (createCookie) {
            Cookie cookie = new Cookie(nextCookie, sessId + "!"); 
            cookie.setPath("/");
            //cookie.setMaxAge(60);
            myResp.addCookie(cookie);
         }
      }
   }
}

REFERENCE TO THE SERVLET FILTER IN web.xml DESCRIPTOR
  <filter>
    <display-name>CookieFilter</display-name>
    <filter-name>CookieFilter</filter-name>
    <filter-class>sample.coherence.CookieFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>CookieFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

WebLogic Cluster 1 nodes
set JAVA_OPTIONS=%JAVA_OPTIONS% -Dcookie.name=WLS1SID
set JAVA_OPTIONS=%JAVA_OPTIONS% -Dcookie.list=WLS1SID;WLS2SID;WLSNSID

WebLogic Cluster 2 nodes
set JAVA_OPTIONS=%JAVA_OPTIONS% -Dcookie.name=WLS2SID
set JAVA_OPTIONS=%JAVA_OPTIONS% -Dcookie.list=WLS1SID;WLS2SID;WLS3NID

WebLogic Cluster N nodes
set JAVA_OPTIONS=%JAVA_OPTIONS% -Dcookie.name=WLSNSID
set JAVA_OPTIONS=%JAVA_OPTIONS% -Dcookie.list=WLS1SID;WLS2SID;WLSNSID

First request to an applicative resource served by the application which uses cookie WLS1SID

- Cookie autogenerated by WebLogic Server:

WLS1SID: bhYgZacv61QaJ6Gh2SV9MjtaTu3BdIoE1T98i2rNJB2y4XsypU3r!-202330354!1365442637731

- Cookies generated by the developed Servlet Filter:

WLS2SID: bhYgZacv61QaJ6Gh2SV9MjtaTu3BdIoE1T98i2rNJB2y4XsypU3r!-202330354!1365442637731
WLSNSID: bhYgZacv61QaJ6Gh2SV9MjtaTu3BdIoE1T98i2rNJB2y4XsypU3r!-202330354!1365442637731

First request to a resource served by the application which uses cookie WLSNSID

- Updated cookie by WebLogic Server:

WLSNSID: bhYgZacv61QaJ6Gh2SV9MjtaTu3BdIoE1T98i2rNJB2y4XsypU3r!934311264!1365442637731