234 lines
7.8 KiB
Java
234 lines
7.8 KiB
Java
package eu.dnetlib.enabling.is.sn.resourcestate;
|
|
|
|
import java.util.Arrays;
|
|
import java.util.Collection;
|
|
import java.util.HashSet;
|
|
import java.util.Set;
|
|
|
|
import javax.xml.transform.dom.DOMResult;
|
|
import javax.xml.ws.wsaddressing.W3CEndpointReference;
|
|
import javax.xml.xpath.XPathExpressionException;
|
|
import javax.xml.xpath.XPathFactory;
|
|
|
|
import com.google.common.collect.Sets;
|
|
import org.apache.commons.logging.Log;
|
|
import org.apache.commons.logging.LogFactory;
|
|
import org.apache.oro.text.perl.Perl5Util;
|
|
import org.springframework.beans.factory.annotation.Autowired;
|
|
import org.springframework.beans.factory.annotation.Required;
|
|
|
|
import eu.dnetlib.enabling.is.sn.AbstractSubscriptionRegistry;
|
|
import eu.dnetlib.enabling.is.sn.SubscriptionRegistry;
|
|
import eu.dnetlib.enabling.is.sn.SubscriptionRequest;
|
|
import eu.dnetlib.enabling.is.sn.TopicExpressionMatchResult;
|
|
import eu.dnetlib.enabling.is.sn.rmi.SubscriptionRequestRejectedException;
|
|
import org.springframework.cache.annotation.CacheEvict;
|
|
import org.springframework.cache.annotation.Cacheable;
|
|
|
|
/**
|
|
* Manage subscription for UPDATE/CREATE/DELETE resource-related topic prefixes.
|
|
*
|
|
* @author marko
|
|
*
|
|
*/
|
|
public class ResourceStateSubscriptionRegistry extends AbstractSubscriptionRegistry implements SubscriptionRegistry {
|
|
|
|
private static final Log log = LogFactory.getLog(ResourceStateSubscriptionRegistry.class);
|
|
|
|
/**
|
|
* subscription DAO.
|
|
*/
|
|
private ResourceStateSubscriptionDAO subscriptionDao;
|
|
|
|
/**
|
|
* subscription request filter.
|
|
*/
|
|
@Autowired
|
|
private SubscriptionRequestFilter subscriptionRequestFilter;
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*
|
|
* @see eu.dnetlib.enabling.is.sn.SubscriptionRegistry#registerSubscription(eu.dnetlib.enabling.is.sn.SubscriptionRequest)
|
|
*/
|
|
@Override
|
|
@CacheEvict(value = "subscriptions", allEntries = true)
|
|
public String registerSubscription(final SubscriptionRequest subscription) throws SubscriptionRequestRejectedException {
|
|
final TopicExpressionMatchResult prefixMatch = matchPrefix(subscription);
|
|
if (prefixMatch == null)
|
|
return null;
|
|
|
|
final TopicExpressionMatchResult typeMatch = matchType(prefixMatch.getRest());
|
|
if (typeMatch == null)
|
|
return null; // TODO: decide whether to fail or not
|
|
|
|
final TopicExpressionMatchResult idMatch = matchId(typeMatch.getRest());
|
|
|
|
if (idMatch == null)
|
|
return null; // TODO: decide whether to fail or not
|
|
|
|
final ResourceStateSubscription rss = new ResourceStateSubscription(subscription, prefixMatch.getPrefix(), typeMatch.getPrefix(), idMatch.getPrefix(),
|
|
idMatch.getRest());
|
|
|
|
if (!getSubscriptionRequestFilter().accept(rss))
|
|
throw new SubscriptionRequestRejectedException(String.format("rejected subscription request, resourceId: '%s', xpath: '%s', from: %s",
|
|
rss.getResourceId(), rss.getXpath(), rss.getSubscriber()));
|
|
|
|
return registerSubscription(rss);
|
|
}
|
|
|
|
/**
|
|
* this registers the real subscription.
|
|
*
|
|
* TODO: am I sure that the overload is a good thing here?
|
|
*
|
|
* @param subscription
|
|
* subscription
|
|
* @return subscription id (potentially changed)
|
|
*/
|
|
private String registerSubscription(final ResourceStateSubscription subscription) {
|
|
if(log.isDebugEnabled()) {
|
|
log.debug("evict subscriptions cache");
|
|
}
|
|
|
|
// TODO: change the dao, and implement a method which finds a given subscription directly.
|
|
final Collection<ResourceStateSubscription> similar = subscriptionDao.listSubscriptions(subscription.getPrefix(), subscription.getType(),
|
|
subscription.getResourceId());
|
|
for (final ResourceStateSubscription r : similar) {
|
|
if (r != null && getAddress(subscription.getSubscriberAsEpr()).equals(getAddress(r.getSubscriberAsEpr()))
|
|
&& (subscription.getXpath() == r.getXpath() || subscription.getXpath().equals(r.getXpath()))
|
|
&& (subscription.getResourceId() == r.getResourceId() || subscription.getResourceId().equals(r.getResourceId())))
|
|
return r.getSubscriptionId();
|
|
}
|
|
|
|
subscriptionDao.addSubscription(subscription);
|
|
|
|
return subscription.getSubscriptionId();
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*
|
|
* @see eu.dnetlib.enabling.is.sn.SubscriptionRegistry#unsubscribe(java.lang.String)
|
|
*/
|
|
@Override
|
|
@CacheEvict(value = "subscriptions", allEntries = true)
|
|
public boolean unsubscribe(final String subId) {
|
|
log.info("evict subscriptions cache");
|
|
return subscriptionDao.removeSubscription(subId);
|
|
}
|
|
|
|
/**
|
|
* Obtains the address component of the EPR.
|
|
*
|
|
* TODO: refactor in a utility class.
|
|
*
|
|
* @param epr
|
|
* endpoint reference
|
|
* @return address contained in the endpoint reference
|
|
*/
|
|
private Object getAddress(final W3CEndpointReference epr) {
|
|
final DOMResult dom = new DOMResult();
|
|
epr.writeTo(dom);
|
|
|
|
try {
|
|
return XPathFactory.newInstance().newXPath().evaluate("//*[local-name() = 'Address']", dom.getNode());
|
|
} catch (final XPathExpressionException e) {
|
|
throw new IllegalStateException("cannot construct xpath expression", e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* extract resource type name.
|
|
*
|
|
* @param rest
|
|
* topic expression without prefix
|
|
* @return tuple containing type name and rest of the prefix
|
|
*/
|
|
public TopicExpressionMatchResult matchType(final String rest) {
|
|
final Perl5Util matcher = new Perl5Util(); // NOPMD
|
|
if (!matcher.match("/^(\\*|[a-zA-Z_0-9]*)($|/)(.*)$/", rest))
|
|
return null;
|
|
|
|
return new TopicExpressionMatchResult(matcher.getMatch().group(1), matcher.getMatch().group(2 + 1));
|
|
}
|
|
|
|
/**
|
|
* extract resource id.
|
|
*
|
|
* @param rest
|
|
* topic expression without prefix
|
|
* @return tuple containing type name and rest of the prefix
|
|
*/
|
|
public TopicExpressionMatchResult matchId(final String rest) {
|
|
final Perl5Util matcher = new Perl5Util(); // NOPMD
|
|
if (!matcher.match("/^([^/]*)(.*)/", rest))
|
|
return null;
|
|
|
|
return new TopicExpressionMatchResult(matcher.getMatch().group(1), matcher.getMatch().group(2));
|
|
}
|
|
|
|
/**
|
|
* return all subscriptions matching a given prefix and a given type. Wildcard subscriptions will match any resource type.
|
|
*
|
|
* @param prefix
|
|
* prefix
|
|
* @param type
|
|
* concrete type
|
|
* @param resId
|
|
* resource identifier
|
|
* @return all matching subscriptions
|
|
*/
|
|
@Override
|
|
@Cacheable(value="subscriptions", key="{ #prefix, #type, #resId }")
|
|
public Collection<ResourceStateSubscription> listMatchingSubscriptions(final String prefix, final String type, final String resId) {
|
|
|
|
if(log.isDebugEnabled()) {
|
|
log.debug(String.format("uncached list subscriptions [prefix: '%s', type: '%s', resourceId: '%s']", prefix, type, resId));
|
|
}
|
|
final Set<ResourceStateSubscription> merged = new HashSet<ResourceStateSubscription>();
|
|
merged.addAll(subscriptionDao.listSubscriptions(prefix, type, resId));
|
|
merged.addAll(subscriptionDao.listSubscriptions(prefix, type, "*"));
|
|
merged.addAll(subscriptionDao.listSubscriptions(prefix, "*", "*"));
|
|
return merged;
|
|
}
|
|
|
|
@Override
|
|
@Cacheable(value="subscriptions")
|
|
public Collection<ResourceStateSubscription> listSubscriptions() {
|
|
log.info("uncached list subscriptions");
|
|
|
|
return Sets.newHashSet(subscriptionDao.listSubscriptions());
|
|
}
|
|
|
|
@Override
|
|
@CacheEvict(value = "subscriptions", allEntries = true)
|
|
public boolean removeSubscription(final String subscriptionId) {
|
|
return subscriptionDao.removeSubscription(subscriptionId);
|
|
}
|
|
|
|
@Override
|
|
protected Collection<String> getAcceptedPrefixes() {
|
|
return Arrays.asList(new String[] { ResourceStateSubscription.PREFIX_CREATE, ResourceStateSubscription.PREFIX_DELETE,
|
|
ResourceStateSubscription.PREFIX_UPDATE });
|
|
}
|
|
|
|
public ResourceStateSubscriptionDAO getSubscriptionDao() {
|
|
return subscriptionDao;
|
|
}
|
|
|
|
@Required
|
|
public void setSubscriptionDao(final ResourceStateSubscriptionDAO subscriptionDao) {
|
|
this.subscriptionDao = subscriptionDao;
|
|
}
|
|
|
|
public SubscriptionRequestFilter getSubscriptionRequestFilter() {
|
|
return subscriptionRequestFilter;
|
|
}
|
|
|
|
public void setSubscriptionRequestFilter(final SubscriptionRequestFilter subscriptionRequestFilter) {
|
|
this.subscriptionRequestFilter = subscriptionRequestFilter;
|
|
}
|
|
|
|
}
|