@Override
public Set<String> findDescendantResources(String parentResourceId, EvaluationCtx context)
throws Exception {
EvaluationResult environment;
String environmentId = null;
Set<String> resourceNames = null;
NodeList children = context.getRequestRoot().getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
Node child = children.item(i);
if (child != null) {
if (PDPConstants.ENVIRONMENT_ELEMENT.equals(child.getLocalName())) {
if (child.getChildNodes() != null && child.getChildNodes().getLength() > 0) {
environment =
context.getAttribute(
new URI(StringAttribute.identifier),
new URI(PDPConstants.ENVIRONMENT_ID_DEFAULT),
null,
new URI(XACMLConstants.ENT_CATEGORY));
if (environment != null
&& environment.getAttributeValue() != null
&& environment.getAttributeValue().isBag()) {
BagAttribute attr = (BagAttribute) environment.getAttributeValue();
environmentId = ((AttributeValue) attr.iterator().next()).encode();
}
}
}
}
}
if (isAbstractResourceCacheEnabled) {
IdentityCacheKey cacheKey;
String key =
PDPConstants.RESOURCE_DESCENDANTS
+ parentResourceId
+ (environmentId != null ? environmentId : "");
tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId();
cacheKey = new IdentityCacheKey(tenantId, key);
IdentityCacheEntry cacheEntry =
(IdentityCacheEntry) abstractResourceCache.getValueFromCache(cacheKey);
if (cacheEntry != null) {
String[] values = cacheEntry.getCacheEntryArray();
resourceNames = new HashSet<String>(Arrays.asList(values));
if (log.isDebugEnabled()) {
log.debug("Carbon Resource Cache Hit");
}
}
if (resourceNames != null) {
resourceNames = findDescendantResources(parentResourceId, environmentId);
if (log.isDebugEnabled()) {
log.debug("Carbon Resource Cache Miss");
}
if (resourceNames != null && !resourceNames.isEmpty()) {
cacheEntry =
new IdentityCacheEntry(resourceNames.toArray(new String[resourceNames.size()]));
abstractResourceCache.addToCache(cacheKey, cacheEntry);
}
}
} else {
resourceNames = findDescendantResources(parentResourceId, environmentId);
}
return resourceNames;
}
@Override
public void clearCache() {
if (abstractResourceCache != null) {
abstractResourceCache.clear();
}
}
