Examples of com.volantis.xml.pipeline.sax.XMLPipeline

com.volantis.xml.pipeline.sax.XMLPipeline
An XMLPipeline consists of a set of XMLProcesses connected together in sequence.
Warning: This is a facade provided for use by user code, not for implementation. User implementations of this interface are highly likely to be incompatible with future releases of the product at both binary and source levels.

Use

An {@link XMLPipeline} is simply a useful way of organising a sequence of{@link XMLProcess}es. There is no guarantee that any two processes will actually be in the same pipeline and so processes must not rely on this. e.g. They should not use the XMLPipeline as a property key in the {@link XMLPipelineContext}.

Although it is possible neither an {@link XMLPipeline} (or{@link XMLProcess}) must be connected directly to an applications SAX event handlers, e.g. {@link org.xml.sax.ContentHandler}. The applications SAX event handlers must only be connected to either an {@link XMLPipelineReader} or an {@link XMLPipelineFilter}

Adding Process

Adding a process to the pipeline involves the following steps irrespective of the location in the pipeline the process is being added.
- Invoke the {@link XMLProcess#setPipeline} method to indicate thatthe process is owned by this pipeline.
- Add the process to the appropriate part of the pipeline.
- Start the process by calling {@link XMLProcess#startProcess}.
Removing Process

Removing a process from the pipeline involves the following steps irrespective of the location in the pipeline that the process is being added.
- Stop the process by calling {@link XMLProcess#stopProcess}.
- Remove the process from the pipeline.
- Invoke the {@link XMLProcess#setPipeline} method to indicate thatthe process is no longer owned by the pipeline.
After removal the caller should almost certainly invoke the {@link XMLProcess#release} method to release any resources associatedwith the process.
@volantis-api-include-in PublicAPI @volantis-api-include-in ProfessionalServicesAPI @volantis-api-include-in InternalAPI

            // the context - this allows relative references in any
            // returned markup to be resolved.
            pipelineContext.pushBaseURI(remappedURL);


                // Create a pipeline 
                XMLPipeline pipeline = pipelineFactory.createPipeline
                    (pipelineContext);
            XMLFilter filter = pipelineFactory.createPipelineFilter(
                    pipeline, true);


            // Create a serializer that will output to the response.
            ServletOutputStream outputStream = httpResponse.getOutputStream();
            XMLSerializer serializer = getSerializer(outputStream);
            filter.setContentHandler(serializer.asContentHandler());


            // Create and initialise the request process.
            HTTPRequestOperationProcess requestOperation =
                    new HTTPRequestOperationProcess();
            requestOperation.setFollowRedirects(
                    Boolean.toString(webdConfig.getFollowRedirects()));
            requestOperation.setUrlString(remappedURL);
            requestOperation.setRequestType(HTTPRequestType.GET);
            // todo this is wrong as the request operation timeout is in
            // todo seconds but the configuration is in milliseconds.
            Period timeout = Period.treatNonPositiveAsIndefinitely(
                    webdConfig.getTimeoutInMillis());
            requestOperation.setTimeout(timeout);


            // This is necessary in order for the request process to be
            // able to pick up the headers, parameters, cookies etc.
            WebDriverAccessor webdAccessor = createWebDriverAccessor(
                    createWebDriverRequest(httpRequest,
                                           marinerRequestContext,
                                           remoteProjectName,
                                           urlRemapper),
                    new WebDriverResponseImpl());
            pipelineContext.setProperty(WebDriverAccessor.class,
                    webdAccessor , false);


            ProxySessionIdOperationProcess proxySessionOperationProcess =
                    new ProxySessionIdOperationProcess();


            XMLProcess urlRewriterProcess =
                    createURLRewriterProcess(httpRequest.getContextPath(),
                                             urlRemapper);


            // Add them to the pipeline, which will start the processes.
            if (transformURL != null) {
                AttributesImpl atts = new AttributesImpl();
                atts.addAttribute("", "href", "href", "string", transformURL);


                pipeline.getPipelineProcess().startElement(Namespace.PIPELINE.getURI(),
                                                       "transform",
                                                       "transform",
                                                       atts);
            }
            pipeline.addHeadProcess(urlRewriterProcess);
            pipeline.addHeadProcess(proxySessionOperationProcess);
            pipeline.addHeadProcess(requestOperation);


            // Removing them from the pipeline will stop the processes.
            pipeline.removeHeadProcess();
            pipeline.removeHeadProcess();
            pipeline.removeHeadProcess();
            if (transformURL != null) {
                pipeline.getPipelineProcess().endElement(Namespace.PIPELINE.getURI(),
                                                       "transform",
                                                       "transform");
            }


            // FLush and close the stream.

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                MarlinSAXHelper.getContentHandler(requestContext);


        XMLPipelineFactory factory = getPipelineFactory(requestContext);


        // Create a pipeline for the pipeline filter.
        XMLPipeline pipeline = createPipeline(requestContext);


        // get the ContextUpdatingProcess, this will make sure that the
        // name spaces are pushed onto the namespace tracker during
        // the replay.
        XMLProcess contextUpdatingProcess = factory.createContextUpdatingProcess();


        pipeline.addHeadProcess(contextUpdatingProcess);


        XMLPipelineFilter mcsFilter = factory.createPipelineFilter(pipeline);


        mcsFilter.setContentHandler(mcsContentHandler);


        // Replay the SAX events into the pipeline.
        PipelinePlayer player = recording.createPlayer();
        player.play(pipeline.getPipelineProcess());
    }

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        EnvironmentContext environmentContext =
                ContextInternals.getEnvironmentContext(requestContext);


        environmentContext.initalisePipelineContextEnvironment(pipelineContext);


      XMLPipeline pipeline = factory.createDynamicPipeline(pipelineContext);
      // create the pipeline fiter
      XMLPipelineFilter pipelineFilter = null;
        try {
            pipelineFilter =
            factory.createPipelineFilter(pipeline);

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                    URIDriverFactory.getDefaultInstance();
            uriDriverFactory.getRuleConfigurator().configure(dynamic);


            XMLPipelineContext context = factory.createPipelineContext(
                    configuration, (EnvironmentInteraction) null);
            XMLPipeline pipeline = factory.createDynamicPipeline(context);
            return factory.createPipelineFilter(pipeline);
        }

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Examples of com.volantis.xml.pipeline.sax.XMLPipeline

Use

Adding Process

Removing Process

Related Classes of com.volantis.xml.pipeline.sax.XMLPipeline