Examples of org.apache.jasper.JspCompilationContext

org.apache.jasper.JspCompilationContext
A place holder for various things that are used through out the JSP engine. This is a per-request/per-context data structure. Some of the instance variables are set at different points. Most of the path-related stuff is here - mangling names, versions, dirs, loading resources and dealing with uris. @author Anil K. Vijendran @author Harish Prabandham @author Pierre Delisle @author Costin Manolache @author Kin-man Chung

        ServletConfig servletConfig = (ServletConfig) context.findChild("jsp");
        if (servletConfig != null) {
            ServletContext sctx = context.getServletContext();
            Options opt = new EmbeddedServletOptions(servletConfig, sctx);
            JspRuntimeContext jrctx = new JspRuntimeContext(sctx, opt);
            JspCompilationContext jcctx = createJspCompilationContext(jspName, false, opt, sctx, jrctx, null);
            servletName = jcctx.getServletJavaFileName();
        } else {
            logger.error("Context " + context.getName() + " does not have \"jsp\" servlet");
        }
        return servletName;
    }

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                        //
                        URLClassLoader classLoader = new URLClassLoader(new URL[]{}, context.getLoader().getClassLoader());
                        for (Iterator it = names.iterator(); it.hasNext();) {
                            String name = (String) it.next();
                            long time = System.currentTimeMillis();
                            JspCompilationContext jcctx = createJspCompilationContext(name, false, opt, sctx, jrctx, classLoader);
                            ClassLoader prevCl = ClassUtils.overrideThreadContextClassLoader(classLoader);
                            try {
                                Item item = (Item) summary.getItems().get(name);
                                if (item != null) {
                                    try {
                                        org.apache.jasper.compiler.Compiler c = jcctx.createCompiler();
                                        c.compile();
                                        item.setState(Item.STATE_READY);
                                        item.setException(null);
                                        logger.info("Compiled " + name + ": OK");
                                    } catch (Exception e) {

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                } catch (JasperException e) {
                    logger.info("isJspPage() thrown an error for "+name, e);
                }


                if (isJsp) {
                    JspCompilationContext jcctx = createJspCompilationContext(name, false, opt, sctx, jrctx, classLoader);
                    ClassLoader prevCl = ClassUtils.overrideThreadContextClassLoader(classLoader);
                    try {
                        Item item = (Item) summary.getItems().get(name);


                        if (item == null) {
                            item = new Item();
                            item.setName(name);
                        }


                        item.setLevel(level);
                        item.setCompileTime(-1);
                        try {
                            ResourceAttributes jspAttributes = (ResourceAttributes) ctx.getResources().getAttributes(name);
                            item.setSize(jspAttributes.getContentLength());
                            item.setLastModified(jspAttributes.getLastModified());
                        } catch (NamingException e) {
                            logger.error("Cannot lookup attributes for " + name);
                        }




                        long time = System.currentTimeMillis();
                        try {
                            org.apache.jasper.compiler.Compiler c = jcctx.createCompiler();
                            if (compile) {
                                c.compile();
                                item.setState(Item.STATE_READY);
                                item.setException(null);
                            } else {

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            logger.debug("getResourcePaths() is null for " + jspName + ". Empty dir? Or Tomcat bug?");
        }
    }


    protected JspCompilationContext createJspCompilationContext(String name, boolean isErrPage, Options opt, ServletContext sctx, JspRuntimeContext jrctx, ClassLoader cl) {
        JspCompilationContext jcctx = new JspCompilationContext(name, false, opt, sctx, null, jrctx);
        if (cl != null && cl instanceof URLClassLoader) {
            jcctx.setClassLoader((URLClassLoader) cl);
        }
        return jcctx;
    }

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        return null;
    }


    @Override
    protected JspCompilationContext createJspCompilationContext(String name, boolean isErrPage, Options opt, ServletContext sctx, JspRuntimeContext jrctx, ClassLoader cl) {
        JspCompilationContext jcctx = new JspCompilationContext(name, false, opt, sctx, null, jrctx);
        if (cl != null) {
            jcctx.setClassLoader(cl);
        }
        return jcctx;
    }

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        }


        Object [] wrappers = jsps.values().toArray();
        for (int i = 0; i < wrappers.length; i++ ) {
            JspServletWrapper jsw = (JspServletWrapper)wrappers[i];
            JspCompilationContext ctxt = jsw.getJspEngineContext();
            // JspServletWrapper also synchronizes on this when
            // it detects it has to do a reload
            synchronized(jsw) {
                try {
                    ctxt.compile();
                } catch (FileNotFoundException ex) {
                    ctxt.incrementRemoved();
                } catch (Throwable t) {
                    ExceptionUtils.handleThrowable(t);
                    jsw.getServletContext().log("Background compile failed",
                                                t);
                }

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     * Compiles and loads a tagfile.
     */
    private Class loadTagFile(Compiler compiler, String tagFilePath,
            TagInfo tagInfo, PageInfo parentPageInfo) throws JasperException {


        JspCompilationContext ctxt = compiler.getCompilationContext();
        JspRuntimeContext rctxt = ctxt.getRuntimeContext();
        JspServletWrapper wrapper = (JspServletWrapper) rctxt
                .getWrapper(tagFilePath);


        synchronized (rctxt) {
            if (wrapper == null) {
                wrapper = new JspServletWrapper(ctxt.getServletContext(), ctxt
                        .getOptions(), tagFilePath, tagInfo, ctxt
                        .getRuntimeContext(), ctxt.getTagFileJarUrl(tagFilePath));
                rctxt.addWrapper(tagFilePath, wrapper);


                // Use same classloader and classpath for compiling tag files
                wrapper.getJspEngineContext().setClassLoader(
                        (URLClassLoader) ctxt.getClassLoader());
                wrapper.getJspEngineContext().setClassPath(ctxt.getClassPath());
            } else {
                // Make sure that JspCompilationContext gets the latest TagInfo
                // for the tag file. TagInfo instance was created the last
                // time the tag file was scanned for directives, and the tag
                // file may have been modified since then.
                wrapper.getJspEngineContext().setTagInfo(tagInfo);
            }


            Class tagClazz;
            int tripCount = wrapper.incTripCount();
            try {
                if (tripCount > 0) {
                    // When tripCount is greater than zero, a circular
                    // dependency exists. The circularily dependant tag
                    // file is compiled in prototype mode, to avoid infinite
                    // recursion.


                    JspServletWrapper tempWrapper = new JspServletWrapper(ctxt
                            .getServletContext(), ctxt.getOptions(),
                            tagFilePath, tagInfo, ctxt.getRuntimeContext(),
                            ctxt.getTagFileJarUrl(tagFilePath));
                    tagClazz = tempWrapper.loadTagFilePrototype();
                    tempVector.add(tempWrapper.getJspEngineContext()
                            .getCompiler());
                } else {
                    tagClazz = wrapper.loadTagFile();

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  this.isTagFile = false;
        this.config = config;
        this.options = options;
        this.jspUri = jspUri;
        ctxt = new JspCompilationContext(jspUri, isErrorPage, options,
           config.getServletContext(),
           this, rctxt);
    }

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  this.isTagFile = true;
        this.config = null;  // not used
        this.options = options;
  this.jspUri = tagFilePath;
  this.tripCount = 0;
        ctxt = new JspCompilationContext(jspUri, tagInfo, options,
           servletContext, this, rctxt,
           tagFileJarUrl);
    }

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            tagFileJarPath = "";
        } else {
            tagFileJarPath = tagFileJarUrl.toString();
        }


        JspCompilationContext ctxt = compiler.getCompilationContext();
        JspRuntimeContext rctxt = ctxt.getRuntimeContext();
        String wrapperUri = tagFileJarPath + tagFilePath;
        JspServletWrapper wrapper = rctxt.getWrapper(wrapperUri);


        synchronized (rctxt) {
            if (wrapper == null) {
                wrapper = new JspServletWrapper(ctxt.getServletContext(), ctxt
                        .getOptions(), tagFilePath, tagInfo, ctxt
                        .getRuntimeContext(), tagFileJarUrl);
                rctxt.addWrapper(wrapperUri, wrapper);


                // Use same classloader and classpath for compiling tag files
                wrapper.getJspEngineContext().setClassLoader(
                        (URLClassLoader) ctxt.getClassLoader());
                wrapper.getJspEngineContext().setClassPath(ctxt.getClassPath());
            } else {
                // Make sure that JspCompilationContext gets the latest TagInfo
                // for the tag file. TagInfo instance was created the last
                // time the tag file was scanned for directives, and the tag
                // file may have been modified since then.
                wrapper.getJspEngineContext().setTagInfo(tagInfo);
            }


            Class tagClazz;
            int tripCount = wrapper.incTripCount();
            try {
                if (tripCount > 0) {
                    // When tripCount is greater than zero, a circular
                    // dependency exists. The circularily dependant tag
                    // file is compiled in prototype mode, to avoid infinite
                    // recursion.


                    JspServletWrapper tempWrapper = new JspServletWrapper(ctxt
                            .getServletContext(), ctxt.getOptions(),
                            tagFilePath, tagInfo, ctxt.getRuntimeContext(),
                            ctxt.getTagFileJarUrl(tagFilePath));
                    // Use same classloader and classpath for compiling tag files
                    tempWrapper.getJspEngineContext().setClassLoader(
                            (URLClassLoader) ctxt.getClassLoader());
                    tempWrapper.getJspEngineContext().setClassPath(ctxt.getClassPath());
                    tagClazz = tempWrapper.loadTagFilePrototype();
                    tempVector.add(tempWrapper.getJspEngineContext()
                            .getCompiler());
                } else {
                    tagClazz = wrapper.loadTagFile();

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