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Lift Framework example source code file (ServletFilterProvider.scala)

This example Lift Framework source code file (ServletFilterProvider.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lift Framework tags/keywords

filter, filterchain, filterconfig, http, httpcontext, httpcontext, httprequestservlet, httpresponseservlet, httpservletrequest, httpservletresponse, request, response, servlet, servletfilterprovider, servletrequest, servletrequest, servletresponse, transientrequestvarhandler

The Lift Framework ServletFilterProvider.scala source code

/*
 * Copyright 2009-2011 WorldWide Conferencing, LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.liftweb 
package http 
package provider 
package servlet 

import javax.servlet._
import javax.servlet.http._

import net.liftweb.common._
import net.liftweb.util._
import net.liftweb.http._
import Helpers._


trait ServletFilterProvider extends Filter with HTTPProvider {
  var ctx: HTTPContext = _

  //We need to capture the ServletContext on init
  def init(config: FilterConfig) {
    ctx = new HTTPServletContext(config.getServletContext)

    LiftRules.setContext(ctx)

    bootLift(Box.legacyNullTest(config.getInitParameter("bootloader")))

  }

  //And throw it away on destruction
  def destroy {
    ctx = null
    terminate
  }

  def context: HTTPContext = ctx

  /**
   * Executes the Lift filter component.
   */
  def doFilter(req: ServletRequest, res: ServletResponse, chain: FilterChain) = {
    if (LiftRules.ending) chain.doFilter(req, res)
    else {
      LiftRules.reqCnt.incrementAndGet()
      try {
        TransientRequestVarHandler(Empty,
                                   RequestVarHandler(Empty,
                                                     (req, res) match {
              case (httpReq: HttpServletRequest, httpRes: HttpServletResponse) =>
                val httpRequest = new HTTPRequestServlet(httpReq, this)
                val httpResponse = new HTTPResponseServlet(httpRes)

                service(httpRequest, httpResponse) {
                  chain.doFilter(req, res)
                }
              case _ => chain.doFilter(req, res)
            }))
      } finally {LiftRules.reqCnt.decrementAndGet()}
    }
  }
}

Other Lift Framework examples (source code examples)

Here is a short list of links related to this Lift Framework ServletFilterProvider.scala source code file:

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