/** Compile (if needed) and load a tag file */
public Class<?> loadTagFile() throws JasperException {
try {
if (ctxt.isRemoved()) {
throw new FileNotFoundException(jspUri);
}
if (options.getDevelopment() || firstTime) {
synchronized (this) {
firstTime = false;
ctxt.compile();
}
} else {
if (compileException != null) {
throw compileException;
}
}
if (reload) {
tagHandlerClass = ctxt.load();
reload = false;
}
} catch (FileNotFoundException ex) {
throw new JasperException(ex);
}
return tagHandlerClass;
}
/**
* Create a JspRuntimeContext for a web application context.
*
* <p>Loads in any previously generated dependencies from file.
*
* @param context ServletContext for web application
*/
public JspRuntimeContext(ServletContext context, Options options) {
this.context = context;
this.options = options;
// Get the parent class loader
parentClassLoader = (URLClassLoader) Thread.currentThread().getContextClassLoader();
if (parentClassLoader == null) {
parentClassLoader = (URLClassLoader) this.getClass().getClassLoader();
}
if (log.isDebugEnabled()) {
if (parentClassLoader != null) {
log.debug(
Localizer.getMessage(
"jsp.message.parent_class_loader_is", parentClassLoader.toString()));
} else {
log.debug(Localizer.getMessage("jsp.message.parent_class_loader_is", "<none>"));
}
}
initClassPath();
if (context instanceof org.apache.jasper.servlet.JspCServletContext) {
return;
}
if (Constants.IS_SECURITY_ENABLED) {
initSecurity();
}
// If this web application context is running from a
// directory, start the background compilation thread
String appBase = context.getRealPath("/");
if (!options.getDevelopment() && appBase != null && options.getCheckInterval() > 0) {
lastCheck = System.currentTimeMillis();
}
}
public void service(HttpServletRequest request, HttpServletResponse response, boolean precompile)
throws ServletException, IOException, FileNotFoundException {
Servlet servlet;
try {
if (ctxt.isRemoved()) {
throw new FileNotFoundException(jspUri);
}
if ((available > 0L) && (available < Long.MAX_VALUE)) {
if (available > System.currentTimeMillis()) {
response.setDateHeader("Retry-After", available);
response.sendError(
HttpServletResponse.SC_SERVICE_UNAVAILABLE,
Localizer.getMessage("jsp.error.unavailable"));
return;
}
// Wait period has expired. Reset.
available = 0;
}
/*
* (1) Compile
*/
if (options.getDevelopment() || firstTime) {
synchronized (this) {
firstTime = false;
// The following sets reload to true, if necessary
ctxt.compile();
}
} else {
if (compileException != null) {
// Throw cached compilation exception
throw compileException;
}
}
/*
* (2) (Re)load servlet class file
*/
servlet = getServlet();
// If a page is to be precompiled only, return.
if (precompile) {
return;
}
} catch (ServletException ex) {
if (options.getDevelopment()) {
throw handleJspException(ex);
}
throw ex;
} catch (FileNotFoundException fnfe) {
// File has been removed. Let caller handle this.
throw fnfe;
} catch (IOException ex) {
if (options.getDevelopment()) {
throw handleJspException(ex);
}
throw ex;
} catch (IllegalStateException ex) {
if (options.getDevelopment()) {
throw handleJspException(ex);
}
throw ex;
} catch (Exception ex) {
if (options.getDevelopment()) {
throw handleJspException(ex);
}
throw new JasperException(ex);
}
try {
/*
* (3) Handle limitation of number of loaded Jsps
*/
if (unloadAllowed) {
synchronized (this) {
if (unloadByCount) {
if (unloadHandle == null) {
unloadHandle = ctxt.getRuntimeContext().push(this);
} else if (lastUsageTime < ctxt.getRuntimeContext().getLastJspQueueUpdate()) {
ctxt.getRuntimeContext().makeYoungest(unloadHandle);
lastUsageTime = System.currentTimeMillis();
}
} else {
if (lastUsageTime < ctxt.getRuntimeContext().getLastJspQueueUpdate()) {
lastUsageTime = System.currentTimeMillis();
}
}
}
}
/*
* (4) Service request
*/
if (servlet instanceof SingleThreadModel) {
// sync on the wrapper so that the freshness
// of the page is determined right before servicing
synchronized (this) {
servlet.service(request, response);
}
} else {
servlet.service(request, response);
}
} catch (UnavailableException ex) {
String includeRequestUri =
(String) request.getAttribute(RequestDispatcher.INCLUDE_REQUEST_URI);
if (includeRequestUri != null) {
// This file was included. Throw an exception as
// a response.sendError() will be ignored by the
// servlet engine.
throw ex;
}
int unavailableSeconds = ex.getUnavailableSeconds();
if (unavailableSeconds <= 0) {
unavailableSeconds = 60; // Arbitrary default
}
available = System.currentTimeMillis() + (unavailableSeconds * 1000L);
response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE, ex.getMessage());
} catch (ServletException ex) {
if (options.getDevelopment()) {
throw handleJspException(ex);
}
throw ex;
} catch (IOException ex) {
if (options.getDevelopment()) {
throw handleJspException(ex);
}
throw ex;
} catch (IllegalStateException ex) {
if (options.getDevelopment()) {
throw handleJspException(ex);
}
throw ex;
} catch (Exception ex) {
if (options.getDevelopment()) {
throw handleJspException(ex);
}
throw new JasperException(ex);
}
}
public void service(HttpServletRequest request, HttpServletResponse response, boolean precompile)
throws ServletException, IOException, FileNotFoundException {
try {
if (ctxt.isRemoved()) {
throw new FileNotFoundException(jspUri);
}
if ((available > 0L) && (available < Long.MAX_VALUE)) {
response.setDateHeader("Retry-After", available);
response.sendError(
HttpServletResponse.SC_SERVICE_UNAVAILABLE,
Localizer.getMessage("jsp.error.unavailable"));
}
if (options.getDevelopment() || firstTime) {
synchronized (this) {
ctxt.compile();
}
}
if (reload) {
getServlet();
}
// If a page is to only to be precompiled return.
if (precompile) {
return;
}
if (theServlet instanceof SingleThreadModel) {
// sync on the wrapper so that the freshness
// of the page is determined right before servicing
synchronized (this) {
theServlet.service(request, response);
}
} else {
theServlet.service(request, response);
}
} catch (UnavailableException ex) {
String includeRequestUri = (String) request.getAttribute("javax.servlet.include.request_uri");
if (includeRequestUri != null) {
// This file was included. Throw an exception as
// a response.sendError() will be ignored by the
// servlet engine.
throw ex;
} else {
int unavailableSeconds = ex.getUnavailableSeconds();
if (unavailableSeconds <= 0) {
unavailableSeconds = 60; // Arbitrary default
}
available = System.currentTimeMillis() + (unavailableSeconds * 1000L);
response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE, ex.getMessage());
}
} catch (FileNotFoundException ex) {
String includeRequestUri = (String) request.getAttribute("javax.servlet.include.request_uri");
if (includeRequestUri != null) {
// This file was included. Throw an exception as
// a response.sendError() will be ignored by the
// servlet engine.
throw new ServletException(ex);
} else {
try {
response.sendError(HttpServletResponse.SC_NOT_FOUND, ex.getMessage());
} catch (IllegalStateException ise) {
log.error(Localizer.getMessage("jsp.error.file.not.found", ex.getMessage()), ex);
}
}
} catch (ServletException ex) {
throw ex;
} catch (IOException ex) {
throw ex;
} catch (IllegalStateException ex) {
throw ex;
} catch (Exception ex) {
throw new JasperException(ex);
}
}