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package com.sun.grizzly.http.servlet;
import java.io.IOException;
import java.util.ArrayList;
import java.util.EventListener;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.locks.ReentrantLock;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.Servlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletRequestEvent;
import javax.servlet.ServletRequestListener;
import javax.servlet.ServletResponse;
import com.sun.grizzly.tcp.Constants;
import com.sun.grizzly.tcp.Request;
import com.sun.grizzly.tcp.Response;
import com.sun.grizzly.tcp.http11.GrizzlyAdapter;
import com.sun.grizzly.tcp.http11.GrizzlyRequest;
import com.sun.grizzly.tcp.http11.GrizzlyResponse;
import com.sun.grizzly.util.ClassLoaderUtil;
import com.sun.grizzly.util.Grizzly;
import com.sun.grizzly.util.IntrospectionUtils;
import com.sun.grizzly.util.LoggerUtils;
import com.sun.grizzly.util.LogMessages;
import com.sun.grizzly.util.buf.MessageBytes;
import com.sun.grizzly.util.http.Cookie;
import com.sun.grizzly.util.http.HttpRequestURIDecoder;
/**
* Adapter class that can initiate a {@link javax.servlet.FilterChain} and execute its
* {@link Filter} and its {@link Servlet}
*
* Configuring a {@link com.sun.grizzly.http.embed.GrizzlyWebServer} or
* {@link com.sun.grizzly.http.SelectorThread} to use this
* {@link GrizzlyAdapter} implementation add the ability of servicing {@link Servlet}
* as well as static resources.
*
* This class can be used to programatically configure a Servlet, Filters, listeners,
* init parameters, context-param, etc. a application usually defined using the web.xml.
* See {@link #addInitParameter(String, String)} {@link #addContextParameter(String, String)}
* {@link #setProperty(String, Object)}, {@link #addServletListener(String)}, etc.
*
* As an example:
*
* <pre><code>
* GrizzlyWebServer ws = new GrizzlyWebServer("/var/www");
try{
ServletAdapter sa = new ServletAdapter();
sa.setRootFolder("/Path/To/Exploded/War/File");
sa.setServlet(new MyServlet());
// Set the Servlet's Name
// Any ServletConfig.getXXX method can be configured using this call.
// The same apply for ServletContext.getXXX.
sa.setProperty("display-name","myServlet");
sa.addListener("foo.bar.myHttpSessionListener");
sa.addListener(MyOtherHttpSessionListener.class);
sa.addServletContextListener(new FooServletContextListener());
sa.addServletContextAttributeListener(new BarServletCtxAttListener());
sa.addContextParameter("databaseURI","jdbc://");
sa.addInitParameter("password","hello");
sa.setServletPath("/MyServletPath");
sa.setContextPath("/myApp");
ws.addGrizzlyAdapter(sa);
ws.start();
} catch (IOException ex){
// Something when wrong.
}
* </code></pre>
*
* @author Jeanfrancois Arcand
*/
public class ServletAdapter extends GrizzlyAdapter {
private static final Logger LOGGER = LoggerUtils.getLogger();
public static final int REQUEST_RESPONSE_NOTES = 29;
public static final int SERVLETCONFIG_NOTES = 30;
public static final String LOAD_ON_STARTUP="load-on-startup";
protected volatile Servlet servletInstance = null;
private transient List<String> listeners = new ArrayList<String>();
private String servletPath = "";
private String contextPath = "";
// Instanciate the Servlet when the start method is invoked.
private boolean loadOnStartup = false;
/**
* The context parameters.
*/
private Map<String,String> contextParameters = new HashMap<String, String>();
/**
* The servlet initialization parameters
*/
private Map<String,String> servletInitParameters = new HashMap<String, String>();
/**
* Is the Servlet initialized.
*/
private volatile boolean filterChainConfigured = false;
private ReentrantLock filterChainReady = new ReentrantLock();
/**
* The {@link ServletContextImpl}
*/
private final ServletContextImpl servletCtx;
/**
* The {@link ServletConfigImpl}
*/
private ServletConfigImpl servletConfig;
/**
* Holder for our configured properties.
*/
protected HashMap<String,Object> properties = new HashMap<String,Object>();
/**
* Initialize the {@link ServletContext}
*/
protected boolean initialize = true;
protected ClassLoader classLoader;
private final static Object[] lock = new Object[0];
/**
* Filters.
*/
private FilterConfigImpl[] filters = new FilterConfigImpl[8];
public static final int INCREMENT = 8;
/**
* The int which gives the current number of filters.
*/
private int n = 0;
public ServletAdapter() {
this(".");
}
/**
* Create a ServletAdapter which support the specific Servlet
*
* @param servlet Instance to be used by this adapter.
*/
public ServletAdapter(Servlet servlet){
this(".");
this.servletInstance = servlet;
}
/**
* Create a new instance which will look for static pages located
* under <tt>publicDirectory</tt> folder.
* @param publicDirectory the folder where the static resource are located.
*/
public ServletAdapter(String publicDirectory) {
this(publicDirectory, new ServletContextImpl(),
new HashMap<String,String>(), new HashMap<String,String>(),
new ArrayList<String>() );
}
/**
* Convenience constructor.
*
* @param publicDirectory The folder where the static resource are located.
* @param servletCtx {@link ServletContextImpl} to be used by new instance.
* @param contextParameters Context parameters.
* @param servletInitParameters servlet initialization parameres.
* @param listeners Listeners.
*/
protected ServletAdapter(String publicDirectory, ServletContextImpl servletCtx,
Map<String,String> contextParameters, Map<String,String> servletInitParameters,
List<String> listeners){
this(publicDirectory, servletCtx, contextParameters, servletInitParameters, listeners, true);
}
/**
* Convenience constructor.
*
* @param publicDirectory The folder where the static resource are located.
* @param servletCtx {@link ServletContextImpl} to be used by new instance.
* @param contextParameters Context parameters.
* @param servletInitParameters servlet initialization parameres.
* @param listeners Listeners.
* @param initialize false only when the {@link #newServletAdapter()} is invoked.
*/
protected ServletAdapter(String publicDirectory, ServletContextImpl servletCtx,
Map<String,String> contextParameters, Map<String,String> servletInitParameters,
List<String> listeners, boolean initialize){
super(publicDirectory);
this.servletCtx = servletCtx;
servletConfig = new ServletConfigImpl(servletCtx, servletInitParameters);
this.contextParameters = contextParameters;
this.servletInitParameters = servletInitParameters;
this.listeners = listeners;
this.initialize = initialize;
}
/**
* Convenience constructor.
*
* @param publicDirectory The folder where the static resource are located.
* @param servletCtx {@link ServletContextImpl} to be used by new instance.
* @param contextParameters Context parameters.
* @param servletInitParameters servlet initialization parameres.
* @param initialize false only when the {@link #newServletAdapter()} is invoked.
*/
protected ServletAdapter(String publicDirectory, ServletContextImpl servletCtx,
Map<String,String> contextParameters, Map<String,String> servletInitParameters,
boolean initialize){
super(publicDirectory);
this.servletCtx = servletCtx;
servletConfig = new ServletConfigImpl(servletCtx, servletInitParameters);
this.contextParameters = contextParameters;
this.servletInitParameters = servletInitParameters;
this.initialize = initialize;
}
public ServletAdapter(Servlet servlet, ServletContextImpl servletContext) {
super(".");
servletInstance = servlet;
servletCtx = servletContext;
}
/**
* {@inheritDoc}
*/
@Override
public void start(){
try{
if (initialize) {
initWebDir();
configureClassLoader(fileFolders.peek().getCanonicalPath());
}
if( classLoader != null ) {
ClassLoader prevClassLoader = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader( classLoader );
try {
configureServletEnv();
setResourcesContextPath( contextPath );
if( loadOnStartup ) {
loadServlet();
}
} finally {
Thread.currentThread().setContextClassLoader( prevClassLoader );
}
} else {
configureServletEnv();
setResourcesContextPath( contextPath );
if( loadOnStartup ) {
loadServlet();
}
}
} catch (Throwable t){
logger.log(Level.SEVERE,"start",t);
}
}
/**
* Create a {@link java.net.URLClassLoader} which has the capability of
* loading classes jar under an exploded war application.
*
* @param applicationPath Application class path.
* @throws java.io.IOException I/O error.
*/
protected void configureClassLoader(String applicationPath) throws IOException{
if( classLoader == null )
classLoader = ClassLoaderUtil.createURLClassLoader(applicationPath);
}
/**
* {@inheritDoc}
*/
@Override
public void service(GrizzlyRequest request, GrizzlyResponse response) {
if( classLoader != null ) {
ClassLoader prevClassLoader = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader( classLoader );
try {
doService( request, response );
} finally {
Thread.currentThread().setContextClassLoader( prevClassLoader );
}
} else {
doService( request, response );
}
}
public void doService(GrizzlyRequest request, GrizzlyResponse response) {
try {
Request req = request.getRequest();
Response res = response.getResponse();
String uri = request.getRequestURI();
// The request is not for us.
if (!uri.startsWith(contextPath)){
customizeErrorPage(response,"Resource Not Found", 404);
return;
}
HttpServletRequestImpl httpRequest = (HttpServletRequestImpl)
req.getNote(REQUEST_RESPONSE_NOTES);
HttpServletResponseImpl httpResponse = (HttpServletResponseImpl)
res.getNote(REQUEST_RESPONSE_NOTES);
if (httpRequest == null) {
httpRequest = new HttpServletRequestImpl(request);
httpResponse = new HttpServletResponseImpl(response);
req.setNote(REQUEST_RESPONSE_NOTES, httpRequest);
res.setNote(REQUEST_RESPONSE_NOTES, httpResponse);
} else {
httpRequest.update();
httpResponse.update();
}
Cookie[] cookies = request.getCookies();
if (cookies != null) for (Cookie c : cookies) {
if (Constants.SESSION_COOKIE_NAME.equals(c.getName())) {
request.setRequestedSessionId(c.getValue());
request.setRequestedSessionCookie(true);
break;
}
}
loadServlet();
httpRequest.setContextImpl(servletCtx);
httpRequest.setServletPath(servletPath);
httpRequest.initSession();
//TODO: Make this configurable.
httpResponse.addHeader("server", "grizzly/" + Grizzly.getDotedVersion());
FilterChainImpl filterChain = new FilterChainImpl(servletInstance, servletConfig);
filterChain.invokeFilterChain(httpRequest, httpResponse);
} catch (Throwable ex) {
logger.log(Level.SEVERE, "service exception:", ex);
customizeErrorPage(response,"Internal Error", 500);
}
}
/**
* Customize the error page returned to the client.
* @param response the {@link GrizzlyResponse}
* @param message the Http error message
* @param errorCode the error code.
*/
public void customizeErrorPage(GrizzlyResponse response,String message, int errorCode){
response.setStatus(errorCode, message);
response.setContentType("text/html");
try{
response.getWriter().write("<html><body><h1>" + message
+ "</h1></body></html>");
response.getWriter().flush();
} catch (IOException ex){
// We are in a very bad shape. Ignore.
}
}
/**
* Load a {@link Servlet} instance.
*
* @throws javax.servlet.ServletException If failed to
* {@link Servlet#init(javax.servlet.ServletConfig)}.
*/
protected void loadServlet() throws ServletException{
try{
filterChainReady.lock();
if (filterChainConfigured){
return;
}
if (servletInstance == null){
String servletClassName = System.getProperty("com.sun.grizzly.servletClass");
if (servletClassName != null) {
servletInstance = (Servlet)ClassLoaderUtil.load(servletClassName);
}
if (servletInstance != null) {
logger.info("Loading Servlet: " + servletInstance.getClass().getName());
}
}
if (servletInstance != null){
servletInstance.init(servletConfig);
}
for (FilterConfigImpl f: filters){
if (f != null) {
f.getFilter().init(f);
}
}
filterChainConfigured = true;
} finally {
filterChainReady.unlock();
}
}
/**
* Configure the {@link com.sun.grizzly.http.servlet.ServletContextImpl}
* and {@link com.sun.grizzly.http.servlet.ServletConfigImpl}
*
* @throws javax.servlet.ServletException Error while configuring
* {@link Servlet}.
*/
protected void configureServletEnv() throws ServletException{
MessageBytes c = MessageBytes.newInstance();
if (!contextPath.equals("")){
char[] ch = contextPath.toCharArray();
c.setChars(ch, 0, ch.length);
HttpRequestURIDecoder.normalize(c);
contextPath = c.getCharChunk().toString();
}
if (contextPath.equals("/")){
contextPath = "";
}
if (initialize) {
servletCtx.setInitParameter(contextParameters);
servletCtx.setContextPath(contextPath);
servletCtx.setBasePath(getRootFolders().peek());
configureProperties(servletCtx);
servletCtx.initListeners(listeners);
}
servletConfig.setInitParameters(servletInitParameters);
configureProperties(servletConfig);
}
/**
* {@inheritDoc}
*/
@Override
public void afterService(GrizzlyRequest request, GrizzlyResponse response)
throws Exception {
HttpServletRequestImpl httpRequest = (HttpServletRequestImpl)
request.getRequest().getNote(REQUEST_RESPONSE_NOTES);
HttpServletResponseImpl httpResponse = (HttpServletResponseImpl)
response.getResponse().getNote(REQUEST_RESPONSE_NOTES);
if (httpRequest != null) {
httpRequest.recycle();
httpResponse.recycle();
}
}
/**
* Add a new servlet initialization parameter for this servlet.
*
* @param name Name of this initialization parameter to add
* @param value Value of this initialization parameter to add
*/
public void addInitParameter(String name, String value){
servletInitParameters.put(name, value);
}
/**
* Remove a servlet initialization parameter for this servlet.
*
* @param name Name of this initialization parameter to remove
*/
public void removeInitParameter(String name){
servletInitParameters.remove(name);
}
/**
* get a servlet initialization parameter for this servlet.
*
* @param name Name of this initialization parameter to retreive
*/
public String getInitParameter(String name){
return servletInitParameters.get(name);
}
/**
* if the servlet initialization parameter in present for this servlet.
*
* @param name Name of this initialization parameter
*/
public boolean containsInitParameter(String name){
return servletInitParameters.containsKey(name);
}
/**
* Add a new servlet context parameter for this servlet.
*
* @param name Name of this initialization parameter to add
* @param value Value of this initialization parameter to add
*/
public void addContextParameter(String name, String value){
contextParameters.put(name, value);
}
/**
* Add a {@link Filter} to the
* {@link com.sun.grizzly.http.servlet.ServletAdapter.FilterChainImpl}
*
* @param filter an instance of Filter
* @param filterName the Filter's name
* @param initParameters the Filter init parameters.
*/
public void addFilter(Filter filter, String filterName, Map initParameters){
FilterConfigImpl filterConfig = new FilterConfigImpl(servletCtx);
filterConfig.setFilter(filter);
filterConfig.setFilterName(filterName);
filterConfig.setInitParameters(initParameters);
addFilter(filterConfig);
}
/**
* Return the {@link Servlet} instance used by this {@link ServletAdapter}
* @return {@link Servlet} isntance.
*/
public Servlet getServletInstance() {
return servletInstance;
}
/**
* Set the {@link Servlet} instance used by this {@link ServletAdapter}
* @param servletInstance an instance of Servlet.
*/
public void setServletInstance(Servlet servletInstance) {
this.servletInstance = servletInstance;
}
/**
*
* Returns the part of this request's URL that calls
* the servlet. This path starts with a "/" character
* and includes either the servlet name or a path to
* the servlet, but does not include any extra path
* information or a query string. Same as the value of
* the CGI variable SCRIPT_NAME.
*
* <p>This method will return an empty string ("") if the
* servlet used to process this request was matched using
* the "/*" pattern.
*
* @return a <code>String</code> containing
* the name or path of the servlet being
* called, as specified in the request URL,
* decoded, or an empty string if the servlet
* used to process the request is matched
* using the "/*" pattern.
*
*/
public String getServletPath() {
return servletPath;
}
/**
* Programmatically set the servlet path of the Servlet.
*
* @param servletPath Path of {@link Servlet}.
*/
public void setServletPath(String servletPath) {
this.servletPath = servletPath;
if (!servletPath.equals("") && !servletPath.startsWith("/")){
servletPath = "/" + servletPath;
}
}
/**
*
* Returns the portion of the request URI that indicates the context
* of the request. The context path always comes first in a request
* URI. The path starts with a "/" character but does not end with a "/"
* character. For servlets in the default (root) context, this method
* returns "". The container does not decode this string.
*
* <p>It is possible that a servlet container may match a context by
* more than one context path. In such cases this method will return the
* actual context path used by the request and it may differ from the
* path returned by the
* {@link javax.servlet.ServletContext#getContextPath()} method.
* The context path returned by
* {@link javax.servlet.ServletContext#getContextPath()}
* should be considered as the prime or preferred context path of the
* application.
*
* @return a <code>String</code> specifying the
* portion of the request URI that indicates the context
* of the request
*
* @see javax.servlet.ServletContext#getContextPath()
*/
public String getContextPath() {
return contextPath;
}
/**
* Programmatically set the context path of the Servlet.
*
* @param contextPath Context path.
*/
public void setContextPath(String contextPath) {
this.contextPath = contextPath;
}
/**
* Add Servlet listeners that implement {@link EventListener}
*
* @param listenerName name of a Servlet listener
*/
public void addServletListener(String listenerName){
if (listenerName == null) return;
listeners.add(listenerName);
}
/**
* Remove Servlet listeners that implement {@link EventListener}
*
* @param listenerName name of a Servlet listener to remove
*/
public boolean removeServletListener(String listenerName) {
return listenerName != null && listeners.remove(listenerName);
}
/**
* Use reflection to configure Object setter.
*
* @param object Populate this object with available properties.
*/
private void configureProperties(Object object){
for (String s : properties.keySet()) {
String value = properties.get(s).toString();
IntrospectionUtils.setProperty(object, s, value);
}
}
/**
* Return a configured property. Property apply to
* {@link com.sun.grizzly.http.servlet.ServletContextImpl}
* and {@link com.sun.grizzly.http.servlet.ServletConfigImpl}
*
* @param name Name of property to get.
* @return Value of property.
*/
public Object getProperty(String name) {
return properties.get(name);
}
/**
* Set a configured property. Property apply to
* {@link com.sun.grizzly.http.servlet.ServletContextImpl}
* and {@link com.sun.grizzly.http.servlet.ServletConfigImpl}.
* Use this method to map what's you usually
* have in a web.xml like display-name, context-param, etc.
* @param name Name of the property to set
* @param value of the property.
*/
public void setProperty(String name, Object value) {
/**
* Servlet 2.4 specs
*
* If the value is a negative integer,
* or the element is not present, the container is free to load the
* servlet whenever it chooses. If the value is a positive integer
* or 0, the container must load and initialize the servlet as the
* application is deployed.
*/
if (name.equalsIgnoreCase(LOAD_ON_STARTUP) && value != null){
if(value instanceof Boolean && ((Boolean)value) == true){
loadOnStartup = true;
} else {
try {
if((new Integer(value.toString())) >= 0){
loadOnStartup = true;
}
} catch(Exception e){
}
}
}
// Get rid of "-";
int pos = name.indexOf("-");
if (pos > 0){
String pre = name.substring(0,pos);
String post = name.substring(pos+1, pos+2).toUpperCase() + name.substring(pos+2);
name = pre + post;
}
properties.put(name, value);
}
/**
* Remove a configured property. Property apply to
* {@link com.sun.grizzly.http.servlet.ServletContextImpl}
* and {@link com.sun.grizzly.http.servlet.ServletConfigImpl}
*
* @param name Property name to remove.
*/
public void removeProperty(String name) {
properties.remove(name);
}
/**
*
* @return is the servlet will be loaded at startup
*/
public boolean isLoadOnStartup(){
return loadOnStartup;
}
/**
* Destroy this Servlet and its associated
* {@link javax.servlet.ServletContextListener}
*/
@Override
public void destroy(){
if( classLoader != null ) {
ClassLoader prevClassLoader = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader( classLoader );
try {
super.destroy();
servletCtx.destroyListeners();
for (FilterConfigImpl filter : filters) {
if (filter != null)
filter.recycle();
}
if (servletInstance != null) {
servletInstance.destroy();
servletInstance = null;
}
filters = null;
} finally {
Thread.currentThread().setContextClassLoader( prevClassLoader );
}
} else {
super.destroy();
servletCtx.destroyListeners();
}
}
/**
* Create a new {@link ServletAdapter} instance that will share the same
* {@link com.sun.grizzly.http.servlet.ServletContextImpl} and Servlet's
* listener but with an empty map of init-parameters.
*
* @param servlet - The Servlet associated with the {@link ServletAdapter}
* @return a new {@link ServletAdapter}
*/
public ServletAdapter newServletAdapter(Servlet servlet){
ServletAdapter sa = new ServletAdapter(".",servletCtx, contextParameters,
new HashMap<String,String>(), listeners,
false);
if( classLoader != null )
sa.setClassLoader( classLoader );
sa.setServletInstance(servlet);
sa.setServletPath(servletPath);
return sa;
}
protected ServletContextImpl getServletCtx() {
return servletCtx;
}
protected List<String> getListeners() {
return listeners;
}
protected Map<String, String> getContextParameters() {
return contextParameters;
}
public ClassLoader getClassLoader() {
return classLoader;
}
public void setClassLoader( ClassLoader classLoader ) {
this.classLoader = classLoader;
}
/**
* Add a filter to the set of filters that will be executed in this chain.
*
* @param filterConfig The FilterConfig for the servlet to be executed
*/
protected void addFilter(FilterConfigImpl filterConfig) {
synchronized (lock) {
if (n == filters.length) {
FilterConfigImpl[] newFilters =
new FilterConfigImpl[n + INCREMENT];
System.arraycopy(filters, 0, newFilters, 0, n);
filters = newFilters;
}
filters[n++] = filterConfig;
}
}
// ---------------------------------------------------------- Nested Classes
/**
* Implementation of <code>javax.servlet.FilterChain</code> used to manage
* the execution of a set of filters for a particular request. When the
* set of defined filters has all been executed, the next call to
* <code>doFilter()</code> will execute the servlet's <code>service()</code>
* method itself.
*
* @author Craig R. McClanahan
*/
private final class FilterChainImpl implements FilterChain {
/**
* The servlet instance to be executed by this chain.
*/
private final Servlet servlet;
private final ServletConfigImpl configImpl;
/**
* The int which is used to maintain the current position
* in the filter chain.
*/
private int pos = 0;
public FilterChainImpl(final Servlet servlet,
final ServletConfigImpl configImpl) {
this.servlet = servlet;
this.configImpl = configImpl;
}
// ---------------------------------------------------- FilterChain Methods
protected void invokeFilterChain(ServletRequest request, ServletResponse response)
throws IOException, ServletException {
ServletRequestEvent event =
new ServletRequestEvent(configImpl.getServletContext(), request);
try {
for (EventListener l : ((ServletContextImpl) configImpl.getServletContext()).getListeners()) {
try {
if (l instanceof ServletRequestListener) {
((ServletRequestListener) l).requestInitialized(event);
}
} catch (Throwable t) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
LogMessages.WARNING_GRIZZLY_HTTP_SERVLET_CONTAINER_OBJECT_INITIALIZED_ERROR("requestInitialized", "ServletRequestListener", l.getClass().getName()),
t);
}
}
}
pos = 0;
doFilter(request, response);
} finally {
for (EventListener l : ((ServletContextImpl) configImpl.getServletContext()).getListeners()) {
try {
if (l instanceof ServletRequestListener) {
((ServletRequestListener) l).requestDestroyed(event);
}
} catch (Throwable t) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
LogMessages.WARNING_GRIZZLY_HTTP_SERVLET_CONTAINER_OBJECT_DESTROYED_ERROR("requestDestroyed", "ServletRequestListener", l.getClass().getName()),
t);
}
}
}
}
}
/**
* Invoke the next filter in this chain, passing the specified request
* and response. If there are no more filters in this chain, invoke
* the <code>service()</code> method of the servlet itself.
*
* @param request The servlet request we are processing
* @param response The servlet response we are creating
*
* @exception java.io.IOException if an input/output error occurs
* @exception javax.servlet.ServletException if a servlet exception occurs
*/
public void doFilter(ServletRequest request, ServletResponse response)
throws IOException, ServletException {
// Call the next filter if there is one
if (pos < n) {
FilterConfigImpl filterConfig;
synchronized (lock){
filterConfig = filters[pos++];
}
try {
Filter filter = filterConfig.getFilter();
filter.doFilter(request, response, this);
} catch (IOException e) {
throw e;
} catch (ServletException e) {
throw e;
} catch (RuntimeException e) {
throw e;
} catch (Throwable e) {
throw new ServletException("Throwable", e);
}
return;
}
try {
if (servlet != null) {
servlet.service(request, response);
}
} catch (IOException e) {
throw e;
} catch (ServletException e) {
throw e;
} catch (RuntimeException e) {
throw e;
} catch (Throwable e) {
throw new ServletException("Throwable", e);
}
}
// -------------------------------------------------------- Package Methods
protected FilterConfigImpl getFilter(int i) {
return filters[i];
}
protected Servlet getServlet() {
return servlet;
}
protected ServletConfigImpl getServletConfig() {
return configImpl;
}
}
}