package org.infinispan.distribution;
import java.util.Collection;
import java.util.HashSet;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
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.NotifyingNotifiableFuture;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
public class L1ManagerImpl implements L1Manager {
private 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) {
synchronized (key) {
if (!requestors.containsKey(key)) {
requestors.put(key, new HashSet<Address>());
}
if (trace) log.trace("Key %s will be L1 cached by requestor %s so storing requestor for later invalidation", key, origin);
requestors.get(key).add(origin);
}
}
public NotifyingNotifiableFuture<Object> flushCache(Collection<Object> keys, Object retval, Address origin) {
if (trace) log.trace("Invalidating L1 caches for keys %s", keys);
NotifyingNotifiableFuture<Object> future = new AggregatingNotifyingFutureImpl(retval, 2);
Collection<Address> invalidationAddresses = buildInvalidationAddressList(keys, origin);
int nodes = invalidationAddresses.size();
boolean multicast = isUseMulticast(nodes);
if (trace) log.trace("There are %s nodes involved in invalidation. Threshold is: %s; using multicast: %s", nodes, threshold, multicast);
if (multicast) {
if (trace) log.trace("Invalidating keys %s via multicast", keys);
InvalidateCommand ic = commandsFactory.buildInvalidateFromL1Command(false, keys);
try {
rpcManager.broadcastRpcCommandInFuture(ic, future);
} finally {
cleanupRequestors(keys);
}
} else {
try {
InvalidateCommand ic = commandsFactory.buildInvalidateFromL1Command(false, keys);
// Ask the caches who have requested from us to remove
if (trace) log.trace("Keys %s needs invalidation on %s", keys, invalidationAddresses);
rpcManager.invokeRemotelyInFuture(invalidationAddresses, ic, future);
return future;
} finally {
cleanupRequestors(keys);
}
}
return future;
}
private void cleanupRequestors(Collection<Object> keys) {
for (Object key : keys) {
requestors.remove(key);
}
}
private Collection<Address> buildInvalidationAddressList(Collection<Object> keys, Address origin) {
Collection<Address> addresses = new HashSet<Address>();
for (Object key : keys) {
synchronized (key) {
if (requestors.containsKey(key)) {
addresses.addAll(requestors.get(key));
}
}
}
if (origin != null) {
addresses.remove(origin);
}
return addresses;
}
private boolean isUseMulticast(int nodes) {
// User has requested unicast or multicast only
if (threshold == -1) return false;
if (threshold == 0) return true;
// Underlying transport is not multicast capable
if (!rpcManager.getTransport().isMulticastCapable()) return false;
return nodes > threshold;
}
}