Class BaseCallHandler

etc/future/scanner/BaseCallHandler.java:65–616

A Marshaller that output plain Javascript. This marshaller can be tweaked to output Javascript in an HTML context. This class works in concert with CallScriptConduit, they should be considered closely related and it is important to understand what one does while editing the other. TODO: Double check

 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public abstract class BaseCallHandler extends BaseDwrpHandler
{
    /* (non-Javadoc)
     * @see org.directwebremoting.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    public void handle(HttpServletRequest request, HttpServletResponse response) throws IOException
    {
        try
        {
            RealWebContext webContext = (RealWebContext) WebContextFactory.get();
            CallBatch batch = new CallBatch(request);

            // Security checks first, once we've parsed the input
            checkGetAllowed(batch);
            checkNotCsrfAttack(request, batch);

            // Save the batch so marshallException can get at a batch id
            request.setAttribute(ATTRIBUTE_BATCH, batch);

            String normalizedPage = pageNormalizer.normalizePage(batch.getPage());
            webContext.checkPageInformation(normalizedPage, batch.getScriptSessionId(), batch.getWindowName());

            // Various bits of the CallBatch need to be stashed away places
            storeParsedRequest(request, webContext, batch);

            Calls calls = marshallInbound(batch);

            Replies replies = remoter.execute(calls);
            marshallOutbound(replies, response);
        }
        catch (Exception ex)
        {
            marshallException(request, response, ex);
        }
    }

    /**
     * Convert batch into calls.
     * @param batch The data we've parsed from the request
     * @return The function calls to make
     */
    @SuppressWarnings({"ThrowableInstanceNeverThrown"})
    public Calls marshallInbound(CallBatch batch)
    {
        Calls calls = batch.getCalls();

        // Debug the environment
        if (log.isDebugEnabled() && calls.getCallCount() > 0)
        {
            // We can just use 0 because they are all shared
            InboundContext inctx = batch.getInboundContexts().get(0);
            StringBuffer buffer = new StringBuffer();

            for (Iterator<String> it = inctx.getInboundVariableNames(); it.hasNext();)
            {
                String key = it.next();
                InboundVariable value = inctx.getInboundVariable(key);
                if (key.startsWith(ProtocolConstants.INBOUND_CALLNUM_PREFIX) &&