org.opensaml.saml.metadata.resolver.ChainingMetadataResolver Maven / Gradle / Ivy
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* Licensed to the University Corporation for Advanced Internet Development,
* Inc. (UCAID) under one or more contributor license agreements. See the
* NOTICE file distributed with this work for additional information regarding
* copyright ownership. The UCAID licenses this file to You under the Apache
* License, Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.opensaml.saml.metadata.resolver;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import net.shibboleth.utilities.java.support.annotation.constraint.NonnullElements;
import net.shibboleth.utilities.java.support.annotation.constraint.NotLive;
import net.shibboleth.utilities.java.support.annotation.constraint.Unmodifiable;
import net.shibboleth.utilities.java.support.component.AbstractIdentifiableInitializableComponent;
import net.shibboleth.utilities.java.support.component.ComponentInitializationException;
import net.shibboleth.utilities.java.support.component.ComponentSupport;
import net.shibboleth.utilities.java.support.resolver.CriteriaSet;
import net.shibboleth.utilities.java.support.resolver.ResolverException;
import org.joda.time.DateTime;
import org.opensaml.saml.metadata.resolver.filter.MetadataFilter;
import org.opensaml.saml.saml2.metadata.EntityDescriptor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Predicates;
import com.google.common.collect.Collections2;
import com.google.common.collect.ImmutableList;
/**
* A metadata provider that uses registered resolvers, in turn, to answer queries.
*
* The Iterable of entity descriptors returned is the first non-null and non-empty Iterable found while iterating over
* the registered resolvers in resolver list order.
*/
public class ChainingMetadataResolver extends AbstractIdentifiableInitializableComponent implements MetadataResolver,
RefreshableMetadataResolver {
/** Class logger. */
@Nonnull private final Logger log = LoggerFactory.getLogger(ChainingMetadataResolver.class);
/** Registered resolvers. */
@Nonnull @NonnullElements private List resolvers;
/** Constructor. */
public ChainingMetadataResolver() {
resolvers = Collections.emptyList();
}
/**
* Get an immutable the list of currently registered resolvers.
*
* @return list of currently registered resolvers
*/
@Nonnull @NonnullElements @Unmodifiable @NotLive public List getResolvers() {
return ImmutableList.copyOf(resolvers);
}
/**
* Set the registered metadata resolvers.
*
* @param newResolvers the metadata resolvers to use
*
* @throws ResolverException thrown if there is a problem adding the metadata resolvers
*/
public void setResolvers(@Nonnull @NonnullElements final List newResolvers)
throws ResolverException {
ComponentSupport.ifInitializedThrowUnmodifiabledComponentException(this);
ComponentSupport.ifDestroyedThrowDestroyedComponentException(this);
if (newResolvers == null || newResolvers.isEmpty()) {
resolvers = Collections.emptyList();
return;
}
resolvers = new ArrayList<>(Collections2.filter(newResolvers, Predicates.notNull()));
}
/** {@inheritDoc} */
@Override public boolean isRequireValidMetadata() {
log.warn("Attempt to access unsupported requireValidMetadata property on ChainingMetadataResolver");
return false;
}
/** {@inheritDoc} */
@Override public void setRequireValidMetadata(boolean requireValidMetadata) {
throw new UnsupportedOperationException("Setting requireValidMetadata is not supported on chaining resolver");
}
/** {@inheritDoc} */
@Override public MetadataFilter getMetadataFilter() {
log.warn("Attempt to access unsupported MetadataFilter property on ChainingMetadataResolver");
return null;
}
/** {@inheritDoc} */
@Override public void setMetadataFilter(MetadataFilter newFilter) {
throw new UnsupportedOperationException("Metadata filters are not supported on ChainingMetadataResolver");
}
/** {@inheritDoc} */
@Override
@Nullable public EntityDescriptor resolveSingle(@Nullable final CriteriaSet criteria) throws ResolverException {
ComponentSupport.ifNotInitializedThrowUninitializedComponentException(this);
final Iterable iterable = resolve(criteria);
if (iterable != null) {
final Iterator iterator = iterable.iterator();
if (iterator != null && iterator.hasNext()) {
return iterator.next();
}
}
return null;
}
/** {@inheritDoc} */
@Override
@Nonnull public Iterable resolve(@Nullable final CriteriaSet criteria) throws ResolverException {
ComponentSupport.ifNotInitializedThrowUninitializedComponentException(this);
for (final MetadataResolver resolver : resolvers) {
try {
final Iterable descriptors = resolver.resolve(criteria);
if (descriptors != null && descriptors.iterator().hasNext()) {
return descriptors;
}
} catch (final ResolverException e) {
log.warn("Error retrieving metadata from resolver of type {}, proceeding to next resolver",
resolver.getClass().getName(), e);
continue;
}
}
return Collections.emptyList();
}
/** {@inheritDoc} */
@Override public void refresh() throws ResolverException {
for (final MetadataResolver resolver : resolvers) {
if (resolver instanceof RefreshableMetadataResolver) {
((RefreshableMetadataResolver) resolver).refresh();
}
}
}
/** {@inheritDoc} */
@Override
@Nullable public DateTime getLastUpdate() {
DateTime ret = null;
for (final MetadataResolver resolver : resolvers) {
if (resolver instanceof RefreshableMetadataResolver) {
final DateTime lastUpdate = ((RefreshableMetadataResolver) resolver).getLastUpdate();
if (ret == null || ret.isBefore(lastUpdate)) {
ret = lastUpdate;
}
}
}
return ret;
}
/** {@inheritDoc} */
@Override
@Nullable public DateTime getLastRefresh() {
DateTime ret = null;
for (final MetadataResolver resolver : resolvers) {
if (resolver instanceof RefreshableMetadataResolver) {
final DateTime lastRefresh = ((RefreshableMetadataResolver) resolver).getLastRefresh();
if (ret == null || ret.isBefore(lastRefresh)) {
ret = lastRefresh;
}
}
}
return ret;
}
/** {@inheritDoc} */
@Override protected void doInitialize() throws ComponentInitializationException {
super.doInitialize();
if (resolvers == null) {
log.warn("ChainingMetadataResolver was not configured with any member MetadataResolvers");
resolvers = Collections.emptyList();
}
}
/** {@inheritDoc} */
@Override protected void doDestroy() {
super.doDestroy();
resolvers = Collections.emptyList();
}
}