Examples of org.apache.jasper.servlet.JspServletWrapper

org.apache.jasper.servlet.JspServletWrapper
The JSP engine (a.k.a Jasper). The servlet container is responsible for providing a URLClassLoader for the web application context Jasper is being used in. Jasper will try get the Tomcat ServletContext attribute for its ServletContext class loader, if that fails, it uses the parent class loader. In either case, it must be a URLClassLoader. @author Anil K. Vijendran @author Harish Prabandham @author Remy Maucherat @author Kin-man Chung @author Glenn Nielsen @author Tim Fennell

     * registered with this class for JSP's.
     */
    private void checkCompile() {
        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) {
                    jsw.getServletContext().log("Background compile failed",
            t);
                }
            }
        }
    }

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                              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(),
                                                (JarFile) ctxt.getTagFileJars().get(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());
            }


            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(),
                                                (JarFile) ctxt.getTagFileJars().get(tagFilePath));
                    tagClazz = tempWrapper.loadTagFilePrototype();
                    tempVector.add(
                               tempWrapper.getJspEngineContext().getCompiler());
                } else {
                    tagClazz = wrapper.loadTagFile();
                }
            } finally {
                wrapper.decTripCount();

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     * registered with this class for JSP's.
     */
    private void checkCompile() {
        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) {
                    jsw.getServletContext().log("Background compile failed",
            t);
                }
            }
        }
    }

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     * registered with this class for JSP's.
     */
    private void checkCompile() {
        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) {
                    jsw.getServletContext().log("Background compile failed",
            t);
                }
            }
        }
    }

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    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(), (URL) ctxt.getTagFileJarUrls()
                        .get(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(),
                            (URL) ctxt.getTagFileJarUrls().get(tagFilePath));
                    tagClazz = tempWrapper.loadTagFilePrototype();
                    tempVector.add(tempWrapper.getJspEngineContext()
                            .getCompiler());
                } else {
                    tagClazz = wrapper.loadTagFile();
                }
            } finally {

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        if (log.isTraceEnabled()) {
            log.trace(Localizer.getMessage("jsp.message.jsp_added",
                                           jsw.getJspUri(), context.getContextPath()));
        }
        FastRemovalDequeue<JspServletWrapper>.Entry entry = jspQueue.push(jsw);
        JspServletWrapper replaced = entry.getReplaced();
        if (replaced != null) {
            if (log.isDebugEnabled()) {
                log.debug(Localizer.getMessage("jsp.message.jsp_removed_excess",
                                               replaced.getJspUri(), context.getContextPath()));
            }
            unloadJspServletWrapper(replaced);
            entry.clearReplaced();
        }
        return entry;

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     *
     * @param unloadHandle the unloadHandle for the jsp.
     * */
    public void makeYoungest(FastRemovalDequeue<JspServletWrapper>.Entry unloadHandle) {
        if (log.isTraceEnabled()) {
            JspServletWrapper jsw = unloadHandle.getContent();
            log.trace(Localizer.getMessage("jsp.message.jsp_queue_update",
                                           jsw.getJspUri(), context.getContextPath()));
        }
        jspQueue.moveFirst(unloadHandle);
    }

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            return;
        }
        
        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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        long now = System.currentTimeMillis();
        if (jspIdleTimeout > 0) {
            long unloadBefore = now - jspIdleTimeout;
            Object [] wrappers = jsps.values().toArray();
            for (int i = 0; i < wrappers.length; i++ ) {
                JspServletWrapper jsw = (JspServletWrapper)wrappers[i];
                synchronized(jsw) {
                    if (jsw.getLastUsageTime() < unloadBefore) {
                        if (log.isDebugEnabled()) {
                            log.debug(Localizer.getMessage("jsp.message.jsp_removed_idle",
                                                           jsw.getJspUri(), context.getContextPath(),
                                                           "" + (now-jsw.getLastUsageTime())));
                        }
                        if (jspQueue != null) {
                            jspQueue.remove(jsw.getUnloadHandle());
                        }
                        unloadJspServletWrapper(jsw);
                    }
                }
            }

View Full Code Here

     * registered with this class for JSP's.
     */
    private void checkCompile() {
        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) {
                    jsw.getServletContext().log("Background compile failed",
            t);
                }
            }
        }
    }

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