Examples of org.apache.axis2.dataretrieval.AxisDataLocator

org.apache.axis2.deployment.DeploymentException

AxisDataLocator interface defines getData API for retrieving data particularly metadata like WSDL, Policy, Schema. Web Service engines that have different methods in storing metadata or different types of data to retrieve may code their version of Data Locator(s)by implementing the AxisDataLocator interface. Axis 2 support Data Locator plugin by configuring in Axis2.xml or services.xml.

    public Data[] getData(DataRetrievalRequest request,
                          MessageContext msgContext) throws AxisFault {


        Data[] data = null;
        String dialect = request.getDialect();
        AxisDataLocator dataLocator = null;
        int nextDataLocatorIndex = 0;
        int totalLocators = availableDataLocatorTypes.length;
        for (int i = 0; i < totalLocators; i++) {
            dataLocator = getDataLocator(availableDataLocatorTypes[i], dialect);
            if (dataLocator != null) {
                nextDataLocatorIndex = i + 1;
                break;
            }
        }


        data = dataLocator.getData(request, msgContext);
        // Null means Data Locator not understood request. Automatically find
        // Data Locator in the hierarchy to process the request.
        if (data == null) {
            if (nextDataLocatorIndex < totalLocators) {
                data = bubbleupDataLocators(nextDataLocatorIndex, request,

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    private Data[] bubbleupDataLocators(int nextIndex,
                                        DataRetrievalRequest request, MessageContext msgContext)
            throws AxisFault {
        Data[] data = null;
        if (nextIndex < availableDataLocatorTypes.length) {
            AxisDataLocator dataLocator = getDataLocator(
                    availableDataLocatorTypes[nextIndex], request.getDialect());
            nextIndex++;
            if (dataLocator != null) {
                data = dataLocator.getData(request, msgContext);
                if (data == null) {
                    data = bubbleupDataLocators(nextIndex, request, msgContext);
                } else {
                    return data;
                }

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    /*
    * Get data locator instance based on the LocatorType and dialect.
    */
    private AxisDataLocator getDataLocator(LocatorType locatorType, String dialect)
            throws AxisFault {
        AxisDataLocator locator = null;
        if (locatorType == LocatorType.SERVICE_DIALECT) {
            locator = getServiceDataLocator(dialect);
        } else if (locatorType == LocatorType.SERVICE_LEVEL) {
            locator = getServiceDataLocator(DRConstants.SERVICE_LEVEL);
        } else if (locatorType == LocatorType.GLOBAL_DIALECT) {

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    * Checks if service level data locator configured for specified dialect.
    * Returns an instance of the data locator if exists, and null otherwise.
    */
    private AxisDataLocator getServiceDataLocator(String dialect)
            throws AxisFault {
        AxisDataLocator locator = null;
        locator = (AxisDataLocator) dataLocators.get(dialect);
        if (locator == null) {
            String className = (String) dataLocatorClassNames.get(dialect);
            if (className != null) {
                locator = loadDataLocator(className);

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    */


    public AxisDataLocator getGlobalDataLocator(String dialect)
            throws AxisFault {
        AxisConfiguration axisConfig = getAxisConfiguration();
        AxisDataLocator locator = null;
        if (axisConfig != null) {
            locator = axisConfig.getDataLocator(dialect);
            if (locator == null) {
                String className = axisConfig.getDataLocatorClassName(dialect);
                if (className != null) {

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    protected AxisDataLocator loadDataLocator(String className)
            throws AxisFault {


        AxisDataLocator locator = null;


        try {
            Class dataLocator;
            dataLocator = Class.forName(className, true, serviceClassLoader);
            locator = (AxisDataLocator) dataLocator.newInstance();

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            deploymentFileData.setClassLoader(isDirectory, getClass().getClassLoader(),
                    (File) cfgCtx.getAxisConfiguration().getParameterValue(
                            Constants.Configuration.ARTIFACTS_TEMP_DIR),
                    cfgCtx.getAxisConfiguration().isChildFirstClassLoading());


            DeploymentClassLoader urlCl
                = (DeploymentClassLoader)deploymentFileData.getClassLoader();
            Thread.currentThread().setContextClassLoader(urlCl);


            // StartupFactory registration
            for (StartupFactory factory : getProviders(StartupFactory.class, urlCl)) {

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    private void handleException(String message, Exception e) throws DeploymentException {
        if (log.isDebugEnabled()) {
            log.debug(message, e);
        }
        throw new DeploymentException(message, e);
    }

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    private void handleException(String message, Throwable t) throws DeploymentException {
        if (log.isDebugEnabled()) {
            log.debug(message, t);
        }
        throw new DeploymentException(message, t);
    }

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            }
        } else {
            String msg = "Artifact representing the filename "
                    + fileName + " is not deployed on Synapse";
            log.error(msg);
            throw new DeploymentException(msg);
        }


        if (log.isDebugEnabled()) {
            log.debug("UnDeployment of the synapse artifact from file : "
                    + fileName + " : COMPLETED");

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