/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* Licensed 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.keycloak.cluster.infinispan;
import java.io.Serializable;
import java.util.Set;
import org.infinispan.Cache;
import org.infinispan.client.hotrod.Flag;
import org.infinispan.client.hotrod.RemoteCache;
import org.infinispan.commons.api.BasicCache;
import org.infinispan.persistence.remote.RemoteStore;
import org.jboss.logging.Logger;
/**
* @author <a href="mailto:mposolda@redhat.com">Marek Posolda</a>
*/
abstract class CrossDCAwareCacheFactory {
protected static final Logger logger = Logger.getLogger(CrossDCAwareCacheFactory.class);
abstract BasicCache<String, Serializable> getCache();
static CrossDCAwareCacheFactory getFactory(Cache<String, Serializable> workCache, Set<RemoteStore> remoteStores) {
if (remoteStores.isEmpty()) {
logger.debugf("No configured remoteStore available. Cross-DC scenario is not used");
return new InfinispanCacheWrapperFactory(workCache);
} else {
logger.debugf("RemoteStore is available. Cross-DC scenario will be used");
if (remoteStores.size() > 1) {
logger.warnf("More remoteStores configured for work cache. Will use just the first one");
}
// For cross-DC scenario, we need to return underlying remoteCache for atomic operations to work properly
RemoteStore remoteStore = remoteStores.iterator().next();
RemoteCache remoteCache = remoteStore.getRemoteCache();
return new RemoteCacheWrapperFactory(remoteCache);
}
}
// We don't have external JDG configured. No cross-DC.
private static class InfinispanCacheWrapperFactory extends CrossDCAwareCacheFactory {
private final Cache<String, Serializable> workCache;
InfinispanCacheWrapperFactory(Cache<String, Serializable> workCache) {
this.workCache = workCache;
}
@Override
BasicCache<String, Serializable> getCache() {
return workCache;
}
}
// We have external JDG configured. Cross-DC should be enabled
private static class RemoteCacheWrapperFactory extends CrossDCAwareCacheFactory {
private final RemoteCache<String, Serializable> remoteCache;
RemoteCacheWrapperFactory(RemoteCache<String, Serializable> remoteCache) {
this.remoteCache = remoteCache;
}
@Override
BasicCache<String, Serializable> getCache() {
// Flags are per-invocation!
return remoteCache.withFlags(Flag.FORCE_RETURN_VALUE);
}
}
}