下面列出了javax.servlet.ServletContext#getNamedDispatcher ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
public PortletRequestDispatcher getNamedDispatcher(ServletContext servletContext, PortletApplicationDefinition app,
String name)
{
if (LOG.isDebugEnabled())
{
LOG.debug("Named PortletRequestDispatcher requested for name: "+name+" at context: "+app.getContextPath());
}
RequestDispatcher dispatcher = servletContext.getNamedDispatcher(name);
if (dispatcher != null)
{
return new PortletRequestDispatcherImpl(dispatcher, name, true);
}
if (LOG.isInfoEnabled())
{
LOG.info("No matching request dispatcher found for name: "+ name);
}
return null;
}
protected void redirect(HttpServletRequest request, HttpServletResponse response, String pathInfo) throws ServletException {
String theServletPath = dispatcherServletPath == null ? "/" : dispatcherServletPath;
ServletContext sc = super.getServletContext();
RequestDispatcher rd = dispatcherServletName != null ? sc.getNamedDispatcher(dispatcherServletName) : sc.getRequestDispatcher(theServletPath + pathInfo);
if (rd == null) {
throw new ServletException("No RequestDispatcher can be created for path " + pathInfo);
}
try {
HttpServletRequestFilter servletRequest = new HttpServletRequestFilter(request, pathInfo, theServletPath);
rd.forward(servletRequest, response);
} catch (Throwable ex) {
throw new ServletException("RequestDispatcher for path " + pathInfo + " has failed");
}
}
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response)
throws Exception {
ServletContext servletContext = getServletContext();
Assert.state(servletContext != null, "No ServletContext");
RequestDispatcher rd = servletContext.getNamedDispatcher(this.servletName);
if (rd == null) {
throw new ServletException("No servlet with name '" + this.servletName + "' defined in web.xml");
}
// If already included, include again, else forward.
if (useInclude(request, response)) {
rd.include(request, response);
if (logger.isTraceEnabled()) {
logger.trace("Included servlet [" + this.servletName +
"] in ServletForwardingController '" + this.beanName + "'");
}
}
else {
rd.forward(request, response);
if (logger.isTraceEnabled()) {
logger.trace("Forwarded to servlet [" + this.servletName +
"] in ServletForwardingController '" + this.beanName + "'");
}
}
return null;
}
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response)
throws Exception {
ServletContext servletContext = getServletContext();
Assert.state(servletContext != null, "No ServletContext");
RequestDispatcher rd = servletContext.getNamedDispatcher(this.servletName);
if (rd == null) {
throw new ServletException("No servlet with name '" + this.servletName + "' defined in web.xml");
}
// If already included, include again, else forward.
if (useInclude(request, response)) {
rd.include(request, response);
if (logger.isTraceEnabled()) {
logger.trace("Included servlet [" + this.servletName +
"] in ServletForwardingController '" + this.beanName + "'");
}
}
else {
rd.forward(request, response);
if (logger.isTraceEnabled()) {
logger.trace("Forwarded to servlet [" + this.servletName +
"] in ServletForwardingController '" + this.beanName + "'");
}
}
return null;
}
public SimpleUrlHandler(ServletContext servletContext) {
defaultServlet = servletContext.getNamedDispatcher(TOMCAT_DEFAULT_SERVLET);
if (null == defaultServlet) {
throw new RuntimeException("没有默认的Servlet");
}
log.info("The default servlet for serving static resource is [{}]", TOMCAT_DEFAULT_SERVLET);
}
@Override
public void handleSubmission(ServletContext context, MCRServletJob job, MCREditorSession session,
String servletNameOrPath)
throws Exception {
session.getSubmission().setSubmittedValues(job.getRequest().getParameterMap());
Document result = session.getEditedXML();
if (session.getValidator().isValid()) {
result = MCRChangeTracker.removeChangeTracking(result);
result = session.getXMLCleaner().clean(result);
result = session.getPostProcessor().process(result);
RequestDispatcher dispatcher = context.getNamedDispatcher(servletNameOrPath);
if (dispatcher == null) {
dispatcher = context.getRequestDispatcher(servletNameOrPath);
}
job.getRequest().setAttribute("MCRXEditorSubmission", result);
session.setBreakpoint("After handling target servlet " + servletNameOrPath);
dispatcher.forward(job.getRequest(), job.getResponse());
} else {
session.setBreakpoint("After validation failed, target servlet " + servletNameOrPath);
job.getResponse().sendRedirect(job.getResponse().encodeRedirectURL(session.getRedirectURL(null)));
}
}
protected RequestDispatcher getRequestDispatcher(ServletContext sc, Class<?> clazz, String path) {
RequestDispatcher rd = dispatcherName != null ? sc.getNamedDispatcher(dispatcherName)
: sc.getRequestDispatcher(path);
if (rd == null) {
String message =
new org.apache.cxf.common.i18n.Message("RESOURCE_PATH_NOT_FOUND",
BUNDLE, path).toString();
LOG.severe(message);
throw ExceptionUtils.toInternalServerErrorException(null, null);
}
return rd;
}
protected void redirect(HttpServletRequest request, HttpServletResponse response, String pathInfo)
throws ServletException {
boolean customServletPath = dispatcherServletPath != null;
String theServletPath = customServletPath ? dispatcherServletPath : "/";
ServletContext sc = super.getServletContext();
RequestDispatcher rd = dispatcherServletName != null
? sc.getNamedDispatcher(dispatcherServletName)
: sc.getRequestDispatcher((theServletPath + pathInfo).replace("//", "/"));
if (rd == null) {
String errorMessage = "No RequestDispatcher can be created for path " + pathInfo;
if (dispatcherServletName != null) {
errorMessage += ", dispatcher name: " + dispatcherServletName;
}
throw new ServletException(errorMessage);
}
try {
for (Map.Entry<String, String> entry : redirectAttributes.entrySet()) {
request.setAttribute(entry.getKey(), entry.getValue());
}
HttpServletRequest servletRequest =
new HttpServletRequestRedirectFilter(request, pathInfo, theServletPath, customServletPath);
if (PropertyUtils.isTrue(getServletConfig().getInitParameter(REDIRECT_WITH_INCLUDE_PARAMETER))) {
rd.include(servletRequest, response);
} else {
rd.forward(servletRequest, response);
}
} catch (Throwable ex) {
throw new ServletException("RequestDispatcher for path " + pathInfo + " has failed", ex);
}
}
public JspHandler(ServletContext servletContext) {
jspServlet = servletContext.getNamedDispatcher(JSP_SERVLET);
if (null == jspServlet) {
throw new RuntimeException("没有jsp Servlet");
}
}
/**
* @inheritDoc
*/
public void register(Tool tool, ServletContext context)
{
ActiveTool at = null;
// make it an active tool
if (tool instanceof MyActiveTool)
{
at = (MyActiveTool) tool;
}
else if (tool instanceof ActiveTool)
{
at = (ActiveTool) tool;
}
else
{
at = new MyActiveTool(tool);
}
// TODO: elevate setServletContext to ActiveTool interface to avoid instance testing
if (at instanceof MyActiveTool) {
((MyActiveTool) at).setServletContext(context);
}
// KNL-409 - JSR-168 Portlets do not dispatch the same as normal
// Sakai tools - so the warning below is not necessary for JSR-168
// tools
String portletContext = null;
Properties toolProps = at.getFinalConfig();
if (toolProps != null) {
portletContext = toolProps
.getProperty(TOOL_PORTLET_CONTEXT_PATH);
}
if (portletContext == null )
{
// try getting the RequestDispatcher, just to test - but DON'T SAVE IT!
// Tomcat's RequestDispatcher is NOT thread safe and must be gotten from the context
// every time its needed!
RequestDispatcher dispatcher = context.getNamedDispatcher(at.getId());
if (dispatcher == null)
{
log.warn("missing dispatcher for tool: " + at.getId());
}
}
m_tools.put(at.getId(), at);
}
/**
* @inheritDoc
*/
public void register(Tool tool, ServletContext context)
{
ActiveTool at = null;
// make it an active tool
if (tool instanceof MyActiveTool)
{
at = (MyActiveTool) tool;
}
else if (tool instanceof ActiveTool)
{
at = (ActiveTool) tool;
}
else
{
at = new MyActiveTool(tool);
}
// TODO: elevate setServletContext to ActiveTool interface to avoid instance testing
if (at instanceof MyActiveTool) {
((MyActiveTool) at).setServletContext(context);
}
// KNL-409 - JSR-168 Portlets do not dispatch the same as normal
// Sakai tools - so the warning below is not necessary for JSR-168
// tools
String portletContext = null;
Properties toolProps = at.getFinalConfig();
if (toolProps != null) {
portletContext = toolProps
.getProperty(TOOL_PORTLET_CONTEXT_PATH);
}
if (portletContext == null )
{
// try getting the RequestDispatcher, just to test - but DON'T SAVE IT!
// Tomcat's RequestDispatcher is NOT thread safe and must be gotten from the context
// every time its needed!
RequestDispatcher dispatcher = context.getNamedDispatcher(at.getId());
if (dispatcher == null)
{
log.warn("missing dispatcher for tool: " + at.getId());
}
}
m_tools.put(at.getId(), at);
}