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

Example 46 with UnavailableException

use of javax.servlet.UnavailableException in project tomcat70 by apache.

the class StandardWrapperValve method event.

/**
 * Process a Comet event. The main differences here are to not use sendError
 * (the response is committed), to avoid creating a new filter chain
 * (which would work but be pointless), and a few very minor tweaks.
 *
 * @param request The servlet request to be processed
 * @param response The servlet response to be created
 *
 * @exception IOException if an input/output error occurs, or is thrown
 *  by a subsequently invoked Valve, Filter, or Servlet
 * @exception ServletException if a servlet error occurs, or is thrown
 *  by a subsequently invoked Valve, Filter, or Servlet
 */
@Override
public void event(Request request, Response response, CometEvent event) throws IOException, ServletException {
    // Initialize local variables we may need
    Throwable throwable = null;
    // This should be a Request attribute...
    long t1 = System.currentTimeMillis();
    // FIXME: Add a flag to count the total amount of events processed ? requestCount++;
    StandardWrapper wrapper = (StandardWrapper) getContainer();
    if (wrapper == null) {
        // Context has been shutdown. Nothing to do here.
        return;
    }
    Servlet servlet = null;
    Context context = (Context) wrapper.getParent();
    // Check for the application being marked unavailable
    boolean unavailable = !context.getState().isAvailable() || wrapper.isUnavailable();
    // Allocate a servlet instance to process this request
    try {
        if (!unavailable) {
            servlet = wrapper.allocate();
        }
    } catch (UnavailableException e) {
    // The response is already committed, so it's not possible to do anything
    } 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();
    request.setAttribute(Globals.DISPATCHER_TYPE_ATTR, DispatcherType.REQUEST);
    request.setAttribute(Globals.DISPATCHER_REQUEST_PATH_ATTR, requestPathMB);
    // Get the current (unchanged) filter chain for this request
    ApplicationFilterChain filterChain = (ApplicationFilterChain) request.getFilterChain();
    // NOTE: This also calls the servlet's event() method
    try {
        if ((servlet != null) && (filterChain != null)) {
            // Swallow output if needed
            if (context.getSwallowOutput()) {
                try {
                    SystemLogHandler.startCapture();
                    filterChain.doFilterEvent(request.getEvent());
                } finally {
                    String log = SystemLogHandler.stopCapture();
                    if (log != null && log.length() > 0) {
                        context.getLogger().info(log);
                    }
                }
            } else {
                filterChain.doFilterEvent(request.getEvent());
            }
        }
    } 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);
    // 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.reuse();
    }
    // 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 47 with UnavailableException

use of javax.servlet.UnavailableException in project tomcat70 by apache.

the class DefaultServlet method init.

/**
 * Initialize this servlet.
 */
@Override
public void init() throws ServletException {
    if (getServletConfig().getInitParameter("debug") != null)
        debug = Integer.parseInt(getServletConfig().getInitParameter("debug"));
    if (getServletConfig().getInitParameter("input") != null)
        input = Integer.parseInt(getServletConfig().getInitParameter("input"));
    if (getServletConfig().getInitParameter("output") != null)
        output = Integer.parseInt(getServletConfig().getInitParameter("output"));
    listings = Boolean.parseBoolean(getServletConfig().getInitParameter("listings"));
    if (getServletConfig().getInitParameter("readonly") != null)
        readOnly = Boolean.parseBoolean(getServletConfig().getInitParameter("readonly"));
    if (getServletConfig().getInitParameter("sendfileSize") != null)
        sendfileSize = Integer.parseInt(getServletConfig().getInitParameter("sendfileSize")) * 1024;
    fileEncoding = getServletConfig().getInitParameter("fileEncoding");
    globalXsltFile = getServletConfig().getInitParameter("globalXsltFile");
    contextXsltFile = getServletConfig().getInitParameter("contextXsltFile");
    localXsltFile = getServletConfig().getInitParameter("localXsltFile");
    readmeFile = getServletConfig().getInitParameter("readmeFile");
    if (getServletConfig().getInitParameter("useAcceptRanges") != null)
        useAcceptRanges = Boolean.parseBoolean(getServletConfig().getInitParameter("useAcceptRanges"));
    // Sanity check on the specified buffer sizes
    if (input < 256)
        input = 256;
    if (output < 256)
        output = 256;
    if (debug > 0) {
        log("DefaultServlet.init:  input buffer size=" + input + ", output buffer size=" + output);
    }
    // Load the proxy dir context.
    resources = (ProxyDirContext) getServletContext().getAttribute(Globals.RESOURCES_ATTR);
    if (resources == null) {
        try {
            resources = (ProxyDirContext) new InitialContext().lookup(RESOURCES_JNDI_NAME);
        } catch (NamingException e) {
            // Failed
            throw new ServletException("No resources", e);
        }
    }
    if (resources == null) {
        throw new UnavailableException("No resources");
    }
    if (getServletConfig().getInitParameter("showServerInfo") != null) {
        showServerInfo = Boolean.parseBoolean(getServletConfig().getInitParameter("showServerInfo"));
    }
}

Example 48 with UnavailableException

use of javax.servlet.UnavailableException in project tomee by apache.

the class DefaultServlet method init.

/**
 * Initialize this servlet.
 */
@Override
public void init() throws ServletException {
    if (getServletConfig().getInitParameter("debug") != null) {
        debug = Integer.parseInt(getServletConfig().getInitParameter("debug"));
    }
    if (getServletConfig().getInitParameter("input") != null) {
        input = Integer.parseInt(getServletConfig().getInitParameter("input"));
    }
    if (getServletConfig().getInitParameter("output") != null) {
        output = Integer.parseInt(getServletConfig().getInitParameter("output"));
    }
    listings = Boolean.parseBoolean(getServletConfig().getInitParameter("listings"));
    if (getServletConfig().getInitParameter("readonly") != null) {
        readOnly = Boolean.parseBoolean(getServletConfig().getInitParameter("readonly"));
    }
    compressionFormats = parseCompressionFormats(getServletConfig().getInitParameter("precompressed"), getServletConfig().getInitParameter("gzip"));
    if (getServletConfig().getInitParameter("sendfileSize") != null) {
        sendfileSize = Integer.parseInt(getServletConfig().getInitParameter("sendfileSize")) * 1024;
    }
    fileEncoding = getServletConfig().getInitParameter("fileEncoding");
    if (fileEncoding == null) {
        fileEncodingCharset = Charset.defaultCharset();
        fileEncoding = fileEncodingCharset.name();
    } else {
        try {
            fileEncodingCharset = B2CConverter.getCharset(fileEncoding);
        } catch (UnsupportedEncodingException e) {
            throw new ServletException(e);
        }
    }
    final String useBomIfPresentConfig = getServletConfig().getInitParameter("useBomIfPresent");
    if (useBomIfPresentConfig != null) {
        if (!Arrays.asList("true", "false", "pass-through").contains(useBomIfPresentConfig)) {
            if (debug > 0) {
                log("DefaultServlet.init:  unsupported value " + useBomIfPresentConfig + " for useBomIfPresent." + " One of 'true', 'false', 'pass-through' is expected. Using 'true' by default.");
            }
        }
        useBomIfPresent = useBomIfPresentConfig;
    }
    globalXsltFile = getServletConfig().getInitParameter("globalXsltFile");
    contextXsltFile = getServletConfig().getInitParameter("contextXsltFile");
    localXsltFile = getServletConfig().getInitParameter("localXsltFile");
    readmeFile = getServletConfig().getInitParameter("readmeFile");
    if (getServletConfig().getInitParameter("useAcceptRanges") != null) {
        useAcceptRanges = Boolean.parseBoolean(getServletConfig().getInitParameter("useAcceptRanges"));
    }
    // Sanity check on the specified buffer sizes
    if (input < 256) {
        input = 256;
    }
    if (output < 256) {
        output = 256;
    }
    if (debug > 0) {
        log("DefaultServlet.init:  input buffer size=" + input + ", output buffer size=" + output);
    }
    // Load the web resources
    resources = (WebResourceRoot) getServletContext().getAttribute(Globals.RESOURCES_ATTR);
    if (resources == null) {
        throw new UnavailableException(sm.getString("defaultServlet.noResources"));
    }
    if (getServletConfig().getInitParameter("showServerInfo") != null) {
        showServerInfo = Boolean.parseBoolean(getServletConfig().getInitParameter("showServerInfo"));
    }
    if (getServletConfig().getInitParameter("sortListings") != null) {
        sortListings = Boolean.parseBoolean(getServletConfig().getInitParameter("sortListings"));
        if (sortListings) {
            boolean sortDirectoriesFirst;
            if (getServletConfig().getInitParameter("sortDirectoriesFirst") != null) {
                sortDirectoriesFirst = Boolean.parseBoolean(getServletConfig().getInitParameter("sortDirectoriesFirst"));
            } else {
                sortDirectoriesFirst = false;
            }
            sortManager = new SortManager(sortDirectoriesFirst);
        }
    }
    if (getServletConfig().getInitParameter("allowPartialPut") != null) {
        allowPartialPut = Boolean.parseBoolean(getServletConfig().getInitParameter("allowPartialPut"));
    }
}

Example 49 with UnavailableException

use of javax.servlet.UnavailableException in project zm-mailbox by Zimbra.

the class SoapServlet method init.

@Override
public void init() throws ServletException {
    LogFactory.init();
    String name = getServletName();
    ZimbraLog.soap.info("Servlet " + name + " starting up");
    super.init();
    mEngine = new SoapEngine();
    int i = 0;
    String cname;
    while ((cname = getInitParameter(PARAM_ENGINE_HANDLER + i)) != null) {
        loadHandler(cname);
        i++;
    }
    // See if any extra services were previously added by extensions
    synchronized (sExtraServices) {
        List<DocumentService> services = LoadingCacheUtil.get(sExtraServices, getServletName());
        for (DocumentService service : services) {
            addService(service);
            i++;
        }
    }
    mEngine.getDocumentDispatcher().clearSoapWhiteList();
    if (i == 0)
        throw new ServletException("Must specify at least one handler " + PARAM_ENGINE_HANDLER + i);
    try {
        Zimbra.startup();
    } catch (OutOfMemoryError e) {
        Zimbra.halt("out of memory", e);
    } catch (Throwable t) {
        ZimbraLog.soap.fatal("Unable to start servlet", t);
        throw new UnavailableException(t.getMessage());
    }
}

Example 50 with UnavailableException

use of javax.servlet.UnavailableException in project jetty.project by eclipse.

the class Dump method init.

/* ------------------------------------------------------------ */
@Override
public void init(ServletConfig config) throws ServletException {
    super.init(config);
    if (config.getInitParameter("unavailable") != null && !fixed) {
        fixed = true;
        throw new UnavailableException("Unavailable test", Integer.parseInt(config.getInitParameter("unavailable")));
    }
    _timer = new Timer(true);
}