Examples of org.apache.cocoon.pipeline.Pipeline

org.apache.cocoon.pipeline.Pipeline
A pipeline expects one or more {@link PipelineComponent}s that passed by using {@link #addComponent(PipelineComponent)}. Then these components get linked with each other in the order they were added. The {@link #setup(OutputStream,Map)} method, calls the setup method on allpipeline components and assembles the pipeline. Finally the {@link #execute()} method produces the result and writes it to the{@link OutputStream} which has been passed to the{@link #setup(OutputStream,Map)} method.

A pipeline works based on two fundamental concepts:
- The first component of a pipeline is of type {@link Starter}. The last component is of type {@link Finisher}.
- In order to link components with each other, the first has to be a {@link Producer}, the latter {@link Consumer}.
When the pipeline links the components, it merely checks whether the above mentioned interfaces are present. So the pipeline does not know about the specific capabilities or the compatibility of the components. It is the responsibility of the {@link Producer} to decide whether a specific{@link Consumer} can be linked to it or not (that is, whether it can produceoutput in the desired format of the {@link Consumer} or not). It is alsoconceivable that a {@link Producer} is capable of accepting different typesof {@link Consumer}s and adjust the output format according to the actual {@link Consumer}.

        configuration.put("id", id);


        ProfilingGenerator profilingGenerator = new ProfilingGenerator();
        profilingGenerator.setProfilingDataHolder(holder);


        Pipeline pipeline = new NonCachingPipeline();
        profilingGenerator.setConfiguration(configuration);


        pipeline.addComponent(profilingGenerator);
        pipeline.addComponent(new XMLSerializer());


        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        pipeline.setup(baos, configuration);
        pipeline.execute();


        String s = baos.toString();


        assertTrue(s.contains("<cocoon-profiling id=\"42\">"));
        assertTrue(s.contains("<component"));

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        configuration.put("id", id);


        ProfilingGenerator profilingGenerator = new ProfilingGenerator();
        profilingGenerator.setProfilingDataHolder(holder);


        Pipeline pipeline = new NonCachingPipeline();
        profilingGenerator.setConfiguration(configuration);


        pipeline.addComponent(profilingGenerator);
        pipeline.addComponent(new XMLSerializer());


        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        pipeline.setup(baos, configuration);
        pipeline.execute();


        String s = baos.toString();


        assertTrue(s.contains("<cocoon-profiling id=\"42\">"));
        assertTrue(s.contains("<component"));

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    @Around("execution(* org.apache.cocoon.pipeline.Pipeline.execute(..))")
    public Object interceptInvoke(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        Object result = proceedingJoinPoint.proceed();


        Pipeline pipeline = (Pipeline) proceedingJoinPoint.getTarget();
        long lastModified = pipeline.getLastModified();
        THREAD_LOCAL.set(lastModified);


        return result;
    }

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        if (pipelineClass == null) {
            throw new IllegalArgumentException("Pipeline type '" + type + "' is not supported.");
        }


        try {
            Pipeline pipeline = pipelineClass.newInstance();
            return pipeline;
        } catch (Exception e) {
            throw new IllegalArgumentException("A pipeline of type '" + type + "' could not be created.", e);
        }
    }

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     * 
     * @throws Exception
     */
    public static void transform(String xmlString, Map<String, Object> xsltParameters, Properties outputProperties,
            OutputStream outputStream, URL... xsltUrls) throws Exception {
        Pipeline pipeline = new NonCachingPipeline();


        pipeline.addComponent(new StringGenerator(xmlString));
        for (URL xsltUrl : xsltUrls) {
            pipeline.addComponent(new XSLTTransformer(xsltUrl, xsltParameters));
        }
        pipeline.addComponent(new XMLSerializer(outputProperties));


        pipeline.setup(outputStream, null);
        pipeline.execute();
    }

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    @Around("execution(* org.apache.cocoon.pipeline.Pipeline.execute(..))")
    public Object interceptInvoke(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        Object result = proceedingJoinPoint.proceed();


        Pipeline pipeline = (Pipeline) proceedingJoinPoint.getTarget();
        String newValue = pipeline.getContentType();
        if (newValue != null) {
            THREAD_LOCAL.set(newValue);
        }


        return result;

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