Examples of org.apache.sling.api.resource.ResourceResolver

org.apache.sling.api.resource.ResourceResolver

The ResourceResolver defines the service API which may be used to resolve {@link Resource} objects. The resource resolver is available tothe request processing servlet through the {@link org.apache.sling.api.SlingHttpServletRequest#getResourceResolver()}method. A resource resolver can also be created through the {@link ResourceResolverFactory}.

The ResourceResolver is also an {@link Adaptable} to getadapters to other types. A JCR based resource resolver might support adapting to the JCR Session used by the resolver to access the JCR Repository.

A ResourceResolver is generally not thread safe! As a consequence, an application which uses the resolver, its returned resources and/or objects resulting from adapting either the resolver or a resource, must provide proper synchronization to ensure no more than one thread concurrently operates against a single resolver, resource or resulting objects.

Accessing Resources

This interface defines two kinds of methods to access resources: The resolve methods and the getResource methods. The difference lies in the algorithm applied to find the requested resource and in the behavior in case a resource cannot be found:

Method Kind	Access Algorithm	Missing Resource
resolve	Path is always assumed to be absolute. Uses elaborate resource resolution algorithm. This kind of method is intended to resolve request URLs to resources.	Returns {@link NonExistingResource}
getResource	Directly access resources with absolute path. For relative paths, the {@link #getSearchPath() search path} is applied. This method is intended tobe used by request processing scripts to access further resources as required.	Returns `null`

Lifecycle

A Resource Resolver has a life cycle which begins with the creation of the Resource Resolver using any of the factory methods and ends with calling the {@link #close()} method. It is very important to call the {@link #close()}method once the resource resolver is not used any more to ensure any system resources are properly cleaned up.

To check whether a Resource Resolver can still be used, the {@link #isLive()}method can be called.

Resource Resolver Attributes

The authentication info properties provided to the {@link ResourceResolverFactory#getResourceResolver(Map)}, {@link ResourceResolverFactory#getAdministrativeResourceResolver(Map)}, or {@link #clone(Map)} are available through the {@link #getAttributeNames()}and {@link #getAttribute(String)} methods with the exception of securitysensitive properties like {@link ResourceResolverFactory#PASSWORD} which isnot exposed.

    @SuppressWarnings("unchecked")
    private void callJsp(final Bindings bindings,
                         final SlingScriptHelper scriptHelper,
                         final ScriptContext context) {


        ResourceResolver resolver = (ResourceResolver) context.getAttribute(SlingScriptConstants.ATTR_SCRIPT_RESOURCE_RESOLVER,
                SlingScriptConstants.SLING_SCOPE);
        if ( resolver == null ) {
            resolver = scriptHelper.getScript().getScriptResource().getResourceResolver();
        }
        final SlingIOProvider io = this.ioProvider;
        final JspFactoryHandler jspfh = this.jspFactoryHandler;


        // abort if JSP Support is shut down concurrently (SLING-2704)
        if (io == null || jspfh == null) {
            logger.warn("callJsp: JSP Script Engine seems to be shut down concurrently; not calling {}",
                    scriptHelper.getScript().getScriptResource().getPath());
            return;
        }


        final ResourceResolver oldResolver = io.setRequestResourceResolver(resolver);
        jspfh.incUsage();
        try {
            final SlingBindings slingBindings = new SlingBindings();
            slingBindings.putAll(bindings);

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    }


    Scriptable globalScope = ScriptableObject.getTopLevelScope(thisObj);


    Resource scriptResource = sling.getScript().getScriptResource();
    ResourceResolver resolver = scriptResource.getResourceResolver();


    // the path of the current script to resolve realtive paths
    String currentScript = sling.getScript().getScriptResource().getPath();
    String scriptParent = ResourceUtil.getParent(currentScript);


    for (Object arg : args) {
      String scriptName = ScriptRuntime.toString(arg);


      Resource loadScript = null;
      if (!scriptName.startsWith("/")) {
        String absScriptName = scriptParent + "/" + scriptName;
        loadScript = resolver.resolve(absScriptName);
      }


      // not resolved relative to the current script
      if (loadScript == null) {
        loadScript = resolver.resolve(scriptName);
      }


      if (loadScript == null) {
        throw Context.reportRuntimeError("Script file " + scriptName
            + " not found");

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    SlingScriptHelper sling = getProperty(cx, thisObj, SlingBindings.SLING,
        SlingScriptHelper.class);
    if (sling == null) {
      throw new NullPointerException(SlingBindings.SLING);
    }
    ResourceResolver resrev = sling.getScript().getScriptResource().getResourceResolver();


    Resource script = null;
    String scriptName = null;
    for (String basepath : resrev.getSearchPath()) {
      script = resrev.resolve(basepath + absolutePath);
      if (script!=null&&!(script instanceof NonExistingResource)) {
        scriptName = basepath + absolutePath;
        break;
      }
    }
    if (script==null) {
      throw Context.reportRuntimeError("Unable to resolve module " + absolutePath + " in search path");
    }


    InputStream scriptStream = script.adaptTo(InputStream.class);
    if (scriptStream == null) {
      //try once again
       scriptStream = resrev.resolve(scriptName).adaptTo(InputStream.class);
      if (scriptStream==null) {
        throw Context.reportRuntimeError("Script file " + script.getPath()
            + " cannot be read");
      }
    }

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                tracker.log("Including script {0} for path={1}, type={2}: {3}", script, resource.getPath(),
                        resource.getResourceType(), servletName);
            }


        } else {
            final ResourceResolver resolver = bindings.getRequest().getResourceResolver();
            final String scriptPath;
            if (!script.startsWith("/")) {


                // resolve relative script
                String parentPath = ResourceUtil.getParent(scriptHelper.getScript().getScriptResource().getPath());
                // check if parent resides on search path
                for (String sp : resolver.getSearchPath()) {
                    if (parentPath.startsWith(sp)) {
                        parentPath = parentPath.substring(sp.length());
                        break;
                    }
                }

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                break;
            }


            try {
                final EventAdmin localEa = this.support.getEventAdmin();
                final ResourceResolver resolver = this.support.getResourceResolver();
                if (localEa != null && resolver != null ) {
                    final String topic = (String) event.remove(EventConstants.EVENT_TOPIC);
                    final String path = (String) event.get(SlingConstants.PROPERTY_PATH);
                    Resource resource = resolver.getResource(path);
                    boolean sendEvent = true;
                    if (!SlingConstants.TOPIC_RESOURCE_REMOVED.equals(topic)) {
                        if (resource != null) {
                            // check if this is a JCR backed resource, otherwise it is not visible!
                            final Node node = resource.adaptTo(Node.class);

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  @Override
  public int doEndTag() {
    log.trace("doEndTag");


    ResourceResolver resolver = getResourceResolver();
    Resource resource = null;
    if (path.startsWith("/")) {
      log.debug("Retrieving resource at absolute path: {}", path);
      resource = resolver.getResource(path);
    } else {
      if (base != null) {
        log.debug(
            "Retrieving resource at relative path: {} to resource {}",
            path, base.getPath());
        resource = resolver.getResource(base, path);
      } else {
        log.warn(
            "Unable to retrieve resource at relative path {}, no base resource specified",
            path);
      }

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   */
  protected ResourceResolver getResourceResolver() {
    final SlingBindings bindings = (SlingBindings) pageContext.getRequest()
        .getAttribute(SlingBindings.class.getName());
    final SlingScriptHelper scriptHelper = bindings.getSling();
    final ResourceResolver resolver = scriptHelper.getRequest()
        .getResourceResolver();
    return resolver;
  }

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     */
    protected void doInit() {


        this.initializing.lock();
        try {
            final ResourceResolver resolver = this.resolver;
            final MapConfigurationProvider factory = this.factory;
            if (resolver == null || factory == null) {
                return;
            }

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            }


            // immediately set the resolver field to null to indicate
            // that we have been disposed (this also signals to the
            // event handler to stop working
            final ResourceResolver oldResolver = this.resolver;
            this.resolver = null;


            if (oldResolver != null) {
                oldResolver.close();
            } else {
                log.warn("dispose: ResourceResolver has already been cleared before; duplicate call to dispose ?");
            }
        } finally {
            if (initLocked) {

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        final String rtPath = (resourceType == null ? null : ResourceUtil.resourceTypeToPath(resourceType));
        // get the resource type resource and check its super type
        String resourceSuperType = null;


        if ( rtPath != null ) {
            ResourceResolver adminResolver = this.getResourceTypeResourceResolver(factory, resolver);
            if ( adminResolver != null ) {
                final Resource rtResource = adminResolver.getResource(rtPath);
                if (rtResource != null) {
                    resourceSuperType = rtResource.getResourceSuperType();
                }
            }
        }

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