/*
* Copyright 2012 Red Hat, Inc. and/or its affiliates.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
package org.infinispan.interceptors;
import org.infinispan.config.Configuration;
import org.infinispan.distribution.DistributionManager;
import org.infinispan.factories.annotations.Inject;
import org.infinispan.factories.annotations.Start;
import org.infinispan.remoting.transport.Transport;
/**
* The same as a regular cache loader interceptor, except that it contains additional logic to force loading from the
* cache loader if needed on a remote node, in certain conditions.
*
* @author Manik Surtani
* @since 5.1
*/
public class ClusteredCacheLoaderInterceptor extends CacheLoaderInterceptor {
private Configuration.CacheMode cacheMode;
private boolean remoteNodeMayNeedToLoad;
private Transport transport;
private DistributionManager distributionManager;
@Inject
private void injectClusteredCacheLoaderInterceptorDependencies(Transport transport, DistributionManager distributionManager) {
this.transport = transport;
this.distributionManager = distributionManager;
}
@Start(priority = 15)
private void startClusteredCacheLoaderInterceptor() {
cacheMode = configuration.getCacheMode();
// For now the coordinator/primary data owner may need to load from the cache store, even if
// this is a remote call, if write skew checking is enabled. Once ISPN-317 is in, this may also need to
// happen if running in distributed mode and eviction is enabled.
remoteNodeMayNeedToLoad = configuration.isWriteSkewCheck() && cacheMode.isClustered();
}
@Override
protected boolean isPrimaryOwner(Object key) {
return remoteNodeMayNeedToLoad && ((cacheMode.isReplicated() && transport.isCoordinator()) ||
(cacheMode.isDistributed() && distributionManager.getPrimaryLocation(key).equals(transport.getAddress())));
}
}