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package com.sun.enterprise.web;
import java.io.IOException;
import java.text.MessageFormat;
import java.util.logging.Logger;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.Request;
import org.apache.catalina.Response;
import org.apache.catalina.Valve;
import org.apache.catalina.Wrapper;
import com.sun.logging.LogDomains;
/**
* Implementation of StandardContextValve which is added as the base valve
* to a web module's ad-hoc pipeline.
*
* A web module's ad-hoc pipeline is invoked for any of the web module's
* ad-hoc paths.
*
* The AdHocContextValve is responsible for invoking the ad-hoc servlet
* associated with the ad-hoc path.
*
* @author Jan Luehe
*/
public class AdHocContextValve implements Valve {
private static final Logger LOGGER =
LogDomains.getLogger(LogDomains.WEB_LOGGER);
private static final String VALVE_INFO =
"com.sun.enterprise.web.AdHocContextValve";
// The web module with which this valve is associated
private WebModule context;
/**
* Constructor.
*/
public AdHocContextValve(WebModule context) {
this.context = context;
}
/**
* Returns descriptive information about this valve.
*/
public String getInfo() {
return VALVE_INFO;
}
/**
* Processes the given request by passing it to the ad-hoc servlet
* associated with the request path (which has been determined, by the
* associated web module, to be an ad-hoc path).
*
* @param request The request to process
* @param response The response to return
*/
public int invoke(Request request, Response response)
throws IOException, ServletException {
HttpServletRequest hreq = (HttpServletRequest) request.getRequest();
HttpServletResponse hres = (HttpServletResponse) response.getResponse();
String adHocServletName =
context.getAdHocServletName(hreq.getServletPath());
Wrapper adHocWrapper = (Wrapper) context.findChild(adHocServletName);
if (adHocWrapper != null) {
Servlet adHocServlet = null;
try {
adHocServlet = adHocWrapper.allocate();
adHocServlet.service(hreq, hres);
} catch (Throwable t) {
hres.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
String msg = LOGGER.getResourceBundle().getString(
"webmodule.adHocContextValve.adHocServletServiceError");
msg = MessageFormat.format(
msg,
new Object[] { hreq.getServletPath() });
response.setDetailMessage(msg);
return END_PIPELINE;
} finally {
if (adHocServlet != null) {
adHocWrapper.deallocate(adHocServlet);
}
}
} else {
hres.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
String msg = LOGGER.getResourceBundle().getString(
"webmodule.adHocContextValve.noAdHocServlet");
msg = MessageFormat.format(
msg,
new Object[] { hreq.getServletPath() });
response.setDetailMessage(msg);
return END_PIPELINE;
}
return END_PIPELINE;
}
public void postInvoke(Request request, Response response)
throws IOException, ServletException {
// Do nothing
}
}