Examples with Servlet javax.servlet.Servlet used on opensource projects

Example 46 with Servlet

use of javax.servlet.Servlet in project tomcat by apache.

the class JspServletWrapper method getServlet.

public Servlet getServlet() throws ServletException {
    // new servlet object is read consistently)
    if (reload) {
        synchronized (this) {
            // of different pages, but not the same page.
            if (reload) {
                // This is to maintain the original protocol.
                destroy();
                final Servlet servlet;
                try {
                    InstanceManager instanceManager = InstanceManagerFactory.getInstanceManager(config);
                    servlet = (Servlet) instanceManager.newInstance(ctxt.getFQCN(), ctxt.getJspLoader());
                } catch (Exception e) {
                    Throwable t = ExceptionUtils.unwrapInvocationTargetException(e);
                    ExceptionUtils.handleThrowable(t);
                    throw new JasperException(t);
                }
                servlet.init(config);
                if (!firstTime) {
                    ctxt.getRuntimeContext().incrementJspReloadCount();
                }
                theServlet = servlet;
                reload = false;
            // Volatile 'reload' forces in order write of 'theServlet' and new servlet object
            }
        }
    }
    return theServlet;
}

Example 47 with Servlet

use of javax.servlet.Servlet in project tomcat by apache.

the class TesterServletContainerInitializer2 method onStartup.

@Override
public void onStartup(Set<Class<?>> c, ServletContext ctx) throws ServletException {
    Servlet s = new TesterServlet();
    ServletRegistration.Dynamic r = ctx.addServlet("TesterServlet2", s);
    r.addMapping("/TesterServlet2");
}

Example 48 with Servlet

use of javax.servlet.Servlet in project tomcat by apache.

the class StandardWrapperValve method invoke.

// --------------------------------------------------------- Public Methods
/**
     * Invoke the servlet we are managing, respecting the rules regarding
     * servlet lifecycle and SingleThreadModel support.
     *
     * @param request Request to be processed
     * @param response Response to be produced
     *
     * @exception IOException if an input/output error occurred
     * @exception ServletException if a servlet error occurred
     */
@Override
public final void invoke(Request request, Response response) throws IOException, ServletException {
    // Initialize local variables we may need
    boolean unavailable = false;
    Throwable throwable = null;
    // This should be a Request attribute...
    long t1 = System.currentTimeMillis();
    requestCount.incrementAndGet();
    StandardWrapper wrapper = (StandardWrapper) getContainer();
    Servlet servlet = null;
    Context context = (Context) wrapper.getParent();
    // Check for the application being marked unavailable
    if (!context.getState().isAvailable()) {
        response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE, sm.getString("standardContext.isUnavailable"));
        unavailable = true;
    }
    // Check for the servlet being marked unavailable
    if (!unavailable && wrapper.isUnavailable()) {
        container.getLogger().info(sm.getString("standardWrapper.isUnavailable", wrapper.getName()));
        long available = wrapper.getAvailable();
        if ((available > 0L) && (available < Long.MAX_VALUE)) {
            response.setDateHeader("Retry-After", available);
            response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE, sm.getString("standardWrapper.isUnavailable", wrapper.getName()));
        } else if (available == Long.MAX_VALUE) {
            response.sendError(HttpServletResponse.SC_NOT_FOUND, sm.getString("standardWrapper.notFound", wrapper.getName()));
        }
        unavailable = true;
    }
    // Allocate a servlet instance to process this request
    try {
        if (!unavailable) {
            servlet = wrapper.allocate();
        }
    } catch (UnavailableException e) {
        container.getLogger().error(sm.getString("standardWrapper.allocateException", wrapper.getName()), e);
        long available = wrapper.getAvailable();
        if ((available > 0L) && (available < Long.MAX_VALUE)) {
            response.setDateHeader("Retry-After", available);
            response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE, sm.getString("standardWrapper.isUnavailable", wrapper.getName()));
        } else if (available == Long.MAX_VALUE) {
            response.sendError(HttpServletResponse.SC_NOT_FOUND, sm.getString("standardWrapper.notFound", wrapper.getName()));
        }
    } catch (ServletException e) {
        container.getLogger().error(sm.getString("standardWrapper.allocateException", wrapper.getName()), StandardWrapper.getRootCause(e));
        throwable = e;
        exception(request, response, e);
    } catch (Throwable e) {
        ExceptionUtils.handleThrowable(e);
        container.getLogger().error(sm.getString("standardWrapper.allocateException", wrapper.getName()), e);
        throwable = e;
        exception(request, response, e);
        servlet = null;
    }
    MessageBytes requestPathMB = request.getRequestPathMB();
    DispatcherType dispatcherType = DispatcherType.REQUEST;
    if (request.getDispatcherType() == DispatcherType.ASYNC)
        dispatcherType = DispatcherType.ASYNC;
    request.setAttribute(Globals.DISPATCHER_TYPE_ATTR, dispatcherType);
    request.setAttribute(Globals.DISPATCHER_REQUEST_PATH_ATTR, requestPathMB);
    // Create the filter chain for this request
    ApplicationFilterChain filterChain = ApplicationFilterFactory.createFilterChain(request, wrapper, servlet);
    // NOTE: This also calls the servlet's service() method
    try {
        if ((servlet != null) && (filterChain != null)) {
            // Swallow output if needed
            if (context.getSwallowOutput()) {
                try {
                    SystemLogHandler.startCapture();
                    if (request.isAsyncDispatching()) {
                        request.getAsyncContextInternal().doInternalDispatch();
                    } else {
                        filterChain.doFilter(request.getRequest(), response.getResponse());
                    }
                } finally {
                    String log = SystemLogHandler.stopCapture();
                    if (log != null && log.length() > 0) {
                        context.getLogger().info(log);
                    }
                }
            } else {
                if (request.isAsyncDispatching()) {
                    request.getAsyncContextInternal().doInternalDispatch();
                } else {
                    filterChain.doFilter(request.getRequest(), response.getResponse());
                }
            }
        }
    } catch (ClientAbortException e) {
        throwable = e;
        exception(request, response, e);
    } catch (IOException e) {
        container.getLogger().error(sm.getString("standardWrapper.serviceException", wrapper.getName(), context.getName()), e);
        throwable = e;
        exception(request, response, e);
    } catch (UnavailableException e) {
        container.getLogger().error(sm.getString("standardWrapper.serviceException", wrapper.getName(), context.getName()), e);
        //            throwable = e;
        //            exception(request, response, e);
        wrapper.unavailable(e);
        long available = wrapper.getAvailable();
        if ((available > 0L) && (available < Long.MAX_VALUE)) {
            response.setDateHeader("Retry-After", available);
            response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE, sm.getString("standardWrapper.isUnavailable", wrapper.getName()));
        } else if (available == Long.MAX_VALUE) {
            response.sendError(HttpServletResponse.SC_NOT_FOUND, sm.getString("standardWrapper.notFound", wrapper.getName()));
        }
    // Do not save exception in 'throwable', because we
    // do not want to do exception(request, response, e) processing
    } catch (ServletException e) {
        Throwable rootCause = StandardWrapper.getRootCause(e);
        if (!(rootCause instanceof ClientAbortException)) {
            container.getLogger().error(sm.getString("standardWrapper.serviceExceptionRoot", wrapper.getName(), context.getName(), e.getMessage()), rootCause);
        }
        throwable = e;
        exception(request, response, e);
    } catch (Throwable e) {
        ExceptionUtils.handleThrowable(e);
        container.getLogger().error(sm.getString("standardWrapper.serviceException", wrapper.getName(), context.getName()), e);
        throwable = e;
        exception(request, response, e);
    }
    // Release the filter chain (if any) for this request
    if (filterChain != null) {
        filterChain.release();
    }
    // Deallocate the allocated servlet instance
    try {
        if (servlet != null) {
            wrapper.deallocate(servlet);
        }
    } catch (Throwable e) {
        ExceptionUtils.handleThrowable(e);
        container.getLogger().error(sm.getString("standardWrapper.deallocateException", wrapper.getName()), e);
        if (throwable == null) {
            throwable = e;
            exception(request, response, e);
        }
    }
    // unload it and release this instance
    try {
        if ((servlet != null) && (wrapper.getAvailable() == Long.MAX_VALUE)) {
            wrapper.unload();
        }
    } catch (Throwable e) {
        ExceptionUtils.handleThrowable(e);
        container.getLogger().error(sm.getString("standardWrapper.unloadException", wrapper.getName()), e);
        if (throwable == null) {
            throwable = e;
            exception(request, response, e);
        }
    }
    long t2 = System.currentTimeMillis();
    long time = t2 - t1;
    processingTime += time;
    if (time > maxTime)
        maxTime = time;
    if (time < minTime)
        minTime = time;
}

Example 49 with Servlet

use of javax.servlet.Servlet in project tomcat by apache.

the class TestAsyncContextImpl method testAsyncContextListenerClearing.

// https://bz.apache.org/bugzilla/show_bug.cgi?id=57326
@Test
public void testAsyncContextListenerClearing() throws Exception {
    resetTracker();
    // Setup Tomcat instance
    Tomcat tomcat = getTomcatInstance();
    // No file system docBase required
    Context ctx = tomcat.addContext("", null);
    Servlet stage1 = new DispatchingServletTracking("/stage2", true);
    Wrapper wrapper1 = Tomcat.addServlet(ctx, "stage1", stage1);
    wrapper1.setAsyncSupported(true);
    ctx.addServletMappingDecoded("/stage1", "stage1");
    Servlet stage2 = new DispatchingServletTracking("/stage3", false);
    Wrapper wrapper2 = Tomcat.addServlet(ctx, "stage2", stage2);
    wrapper2.setAsyncSupported(true);
    ctx.addServletMappingDecoded("/stage2", "stage2");
    Servlet stage3 = new NonAsyncServlet();
    Tomcat.addServlet(ctx, "stage3", stage3);
    ctx.addServletMappingDecoded("/stage3", "stage3");
    TesterAccessLogValve alv = new TesterAccessLogValve();
    ctx.getPipeline().addValve(alv);
    tomcat.start();
    getUrl("http://localhost:" + getPort() + "/stage1");
    assertEquals("doGet-startAsync-doGet-startAsync-onStartAsync-NonAsyncServletGet-onComplete-", getTrack());
    // Check the access log
    alv.validateAccessLog(1, 200, 0, REQUEST_TIME);
}

Example 50 with Servlet

use of javax.servlet.Servlet in project tomcat by apache.

the class TestAsyncContextImpl method doTestDispatchWithSpaces.

private void doTestDispatchWithSpaces(boolean async) throws Exception {
    Tomcat tomcat = getTomcatInstance();
    Context context = tomcat.addContext("", null);
    if (async) {
        Servlet s = new AsyncDispatchUrlWithSpacesServlet();
        Wrapper w = Tomcat.addServlet(context, "space", s);
        w.setAsyncSupported(true);
    } else {
        Tomcat.addServlet(context, "space", new ForwardDispatchUrlWithSpacesServlet());
    }
    context.addServletMappingDecoded("/space/*", "space");
    tomcat.start();
    ByteChunk responseBody = new ByteChunk();
    int rc = getUrl("http://localhost:" + getPort() + "/sp%61ce/foo%20bar", responseBody, null);
    Assert.assertEquals(200, rc);
}