ContainerStaticHandler.java

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package com.sun.grizzly.config;

import java.lang.reflect.Method;

import com.sun.grizzly.standalone.StaticHandler;
import com.sun.grizzly.util.http.mapper.MappingData;
import com.sun.grizzly.util.Interceptor;
import com.sun.grizzly.http.FileCache;
import com.sun.grizzly.http.SelectorThread;
import com.sun.grizzly.tcp.ActionCode;
import java.io.IOException;

import com.sun.grizzly.tcp.Request;
import java.io.File;

/**
 * Extends Grizzly StaticHandler.
 *
 * @author Shing Wai Chan
 * @author Jeanfrancois Arcand
 */
public class ContainerStaticHandler extends StaticHandler {

    private static Method getServletClassMethod = null;
    protected final static int MAPPING_DATA = 12;

    public ContainerStaticHandler() {
    }

    /**
     * Intercept the request and decide if we cache the static resource. If the
     * static resource is already cached, return it.
     */
    @Override
    public int handle(Request req, int handlerCode) throws IOException {
        if (fileCache == null || !fileCache.isEnabled()) {
            return Interceptor.CONTINUE;
        }

        MappingData mappingData = (MappingData) req.getNote(MAPPING_DATA);
        if (handlerCode == Interceptor.RESPONSE_PROCEEDED && mappingData != null) {
            boolean isWebContainer = mappingData.wrapper != null &&
                    mappingData.wrapper.getClass().getName().equals(
                    "org.apache.catalina.core.StandardWrapper");

            ContextRootInfo cri = null;
            if (mappingData.context != null && mappingData.context instanceof ContextRootInfo) {
                cri = (ContextRootInfo) mappingData.context;
            }

            if (isWebContainer) {
                try {
                    Object wrapper = mappingData.wrapper;
                    String servletClass =
                            (String) (getServletClassMethod(wrapper).invoke(wrapper));

                    if ("org.apache.catalina.servlets.DefaultServlet".equals(servletClass)) {
                        String docroot = System.getProperty("com.sun.aas.instanceRoot")
                                + File.separatorChar + "applications";
                        String uri = req.requestURI().toString();
                        fileCache.add(FileCache.DEFAULT_SERVLET_NAME,
                                      docroot,
                                      uri,
                                      req.serverName().toString(),
                                      req.getResponse().getMimeHeaders(),
                                      false);
                    } else {
                        return Interceptor.CONTINUE;
                    }
                } catch (Exception ex) {
                    IOException ioex = new IOException();
                    ioex.initCause(ex);
                    throw ioex;
                }
            } else if (cri != null && cri.getAdapter() instanceof FileCacheAware) {
                //Force caching for nucleus installation.

                req.action(ActionCode.ACTION_REQ_LOCALPORT_ATTRIBUTE, req);
                String docroot = SelectorThread.getSelector(req.getLocalAddress(), req.getLocalPort()).getWebAppRootPath();
                String uri = req.requestURI().toString();
                fileCache.add(FileCache.DEFAULT_SERVLET_NAME,
                              docroot,
                              uri,
                              req.serverName().toString(),
                              req.getResponse().getMimeHeaders(),
                              false);
            }
        }

        if (handlerCode == Interceptor.REQUEST_LINE_PARSED) {
            if (fileCache.sendCache(req)) {
                return Interceptor.BREAK;
            }
        }
        return Interceptor.CONTINUE;
    }

    private static synchronized Method getServletClassMethod(Object wrapper)
            throws NoSuchMethodException {

        if (getServletClassMethod == null) {
            Class clazz = wrapper.getClass();
            getServletClassMethod = clazz.getMethod("getServletClassName");
        }

        return getServletClassMethod;
    }
}