/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.distribution;
import org.infinispan.commands.CommandsFactory;
import org.infinispan.commands.write.InvalidateCommand;
import org.infinispan.config.Configuration;
import org.infinispan.factories.annotations.Inject;
import org.infinispan.remoting.rpc.RpcManager;
import org.infinispan.remoting.transport.Address;
import org.infinispan.util.concurrent.AggregatingNotifyingFutureImpl;
import org.infinispan.util.concurrent.ConcurrentHashSet;
import org.infinispan.util.concurrent.NotifyingNotifiableFuture;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
import java.util.Collection;
import java.util.HashSet;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
public class L1ManagerImpl implements L1Manager {
private static final Log log = LogFactory.getLog(L1ManagerImpl.class);
private final boolean trace = log.isTraceEnabled();
private RpcManager rpcManager;
private CommandsFactory commandsFactory;
private int threshold;
private final ConcurrentMap<Object, Collection<Address>> requestors;
public L1ManagerImpl() {
requestors = new ConcurrentHashMap<Object, Collection<Address>>();
}
@Inject
public void init(Configuration configuration, RpcManager rpcManager, CommandsFactory commandsFactory) {
this.rpcManager = rpcManager;
this.commandsFactory = commandsFactory;
this.threshold = configuration.getL1InvalidationThreshold();
}
public void addRequestor(Object key, Address origin) {
//we do a plain get first as that's likely to be enough
Collection<Address> as = requestors.get(key);
if (as == null) {
// only if needed we create a new HashSet, but make sure we don't replace another one being created
as = new ConcurrentHashSet<Address>();
as.add(origin);
Collection<Address> previousAs = requestors.putIfAbsent(key, as);
if (previousAs != null) {
//another thread added it already, so use his copy and discard our proposed instance
previousAs.add(origin);
}
} else {
as.add(origin);
}
}
public NotifyingNotifiableFuture<Object> flushCache(Collection<Object> keys, Object retval, Address origin) {
if (trace) log.tracef("Invalidating L1 caches for keys %s", keys);
NotifyingNotifiableFuture<Object> future = new AggregatingNotifyingFutureImpl(retval, 2);
Collection<Address> invalidationAddresses = buildInvalidationAddressList(keys, origin);
int nodes = invalidationAddresses.size();
if (nodes > 0) {
// No need to invalidate at all if there is no one to invalidate!
boolean multicast = isUseMulticast(nodes);
if (trace) log.tracef("There are %s nodes involved in invalidation. Threshold is: %s; using multicast: %s", nodes, threshold, multicast);
if (multicast) {
if (trace) log.tracef("Invalidating keys %s via multicast", keys);
InvalidateCommand ic = commandsFactory.buildInvalidateFromL1Command(origin, false, keys);
rpcManager.broadcastRpcCommandInFuture(ic, future);
} else {
InvalidateCommand ic = commandsFactory.buildInvalidateFromL1Command(origin, false, keys);
// Ask the caches who have requested from us to remove
if (trace) log.tracef("Keys %s needs invalidation on %s", keys, invalidationAddresses);
rpcManager.invokeRemotelyInFuture(invalidationAddresses, ic, future);
return future;
}
} else
if (trace) log.trace("No L1 caches to invalidate");
return future;
}
private Collection<Address> buildInvalidationAddressList(Collection<Object> keys, Address origin) {
Collection<Address> addresses = new HashSet<Address>(2);
for (Object key : keys) {
Collection<Address> as = requestors.remove(key);
if (as != null) {
addresses.addAll(as);
if (origin != null && as.contains(origin)) addRequestor(key, origin);
}
}
if (origin != null)
addresses.remove(origin);
return addresses;
}
private boolean isUseMulticast(int nodes) {
// User has requested unicast only
if (threshold == -1) return false;
// Underlying transport is not multicast capable
if (!rpcManager.getTransport().isMulticastCapable()) return false;
// User has requested multicast only
if (threshold == 0) return true;
// we decide:
return nodes > threshold;
}
}