/*
* JBoss, Home of Professional Open Source
* Copyright 2009 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.interceptors.distribution;
import org.infinispan.commands.FlagAffectedCommand;
import org.infinispan.commands.remote.ClusteredGetCommand;
import org.infinispan.commands.write.PutMapCommand;
import org.infinispan.commands.write.RemoveCommand;
import org.infinispan.commands.write.ReplaceCommand;
import org.infinispan.commands.write.VersionedPutKeyValueCommand;
import org.infinispan.commands.write.WriteCommand;
import org.infinispan.container.entries.InternalCacheEntry;
import org.infinispan.container.entries.InternalCacheValue;
import org.infinispan.context.InvocationContext;
import org.infinispan.context.impl.TxInvocationContext;
import org.infinispan.distribution.DistributionManager;
import org.infinispan.factories.annotations.Inject;
import org.infinispan.interceptors.ClusteringInterceptor;
import org.infinispan.interceptors.locking.ClusteringDependentLogic;
import org.infinispan.remoting.responses.ClusteredGetResponseValidityFilter;
import org.infinispan.remoting.responses.Response;
import org.infinispan.remoting.responses.SuccessfulResponse;
import org.infinispan.remoting.rpc.ResponseFilter;
import org.infinispan.remoting.rpc.ResponseMode;
import org.infinispan.remoting.rpc.RpcOptions;
import org.infinispan.remoting.transport.Address;
import org.infinispan.transaction.xa.GlobalTransaction;
import org.infinispan.util.Immutables;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
import java.util.*;
/**
* Base class for distribution of entries across a cluster.
*
* @author Manik Surtani
* @author Mircea.Markus@jboss.com
* @author Pete Muir
* @author Dan Berindei <dan@infinispan.org>
* @since 4.0
*/
public abstract class BaseDistributionInterceptor extends ClusteringInterceptor {
protected DistributionManager dm;
protected ClusteringDependentLogic cdl;
private static final Log log = LogFactory.getLog(BaseDistributionInterceptor.class);
@Override
protected Log getLog() {
return log;
}
@Inject
public void injectDependencies(DistributionManager distributionManager, ClusteringDependentLogic cdl) {
this.dm = distributionManager;
this.cdl = cdl;
}
@Override
protected InternalCacheEntry retrieveFromRemoteSource(Object key, InvocationContext ctx, boolean acquireRemoteLock, FlagAffectedCommand command) throws Exception {
GlobalTransaction gtx = acquireRemoteLock ? ((TxInvocationContext)ctx).getGlobalTransaction() : null;
ClusteredGetCommand get = cf.buildClusteredGetCommand(key, command.getFlags(), acquireRemoteLock, gtx);
List<Address> targets = new ArrayList<Address>(stateTransferManager.getCacheTopology().getReadConsistentHash().locateOwners(key));
// if any of the recipients has left the cluster since the command was issued, just don't wait for its response
targets.retainAll(rpcManager.getTransport().getMembers());
ResponseFilter filter = new ClusteredGetResponseValidityFilter(targets, rpcManager.getAddress());
RpcOptions options = rpcManager.getRpcOptionsBuilder(ResponseMode.WAIT_FOR_VALID_RESPONSE, false)
.responseFilter(filter).build();
Map<Address, Response> responses = rpcManager.invokeRemotely(targets, get, options);
if (!responses.isEmpty()) {
for (Response r : responses.values()) {
if (r instanceof SuccessfulResponse) {
InternalCacheValue cacheValue = (InternalCacheValue) ((SuccessfulResponse) r).getResponseValue();
return cacheValue.toInternalCacheEntry(key);
}
}
}
// TODO If everyone returned null, and the read CH has changed, retry the remote get.
// Otherwise our get command might be processed by the old owners after they have invalidated their data
// and we'd return a null even though the key exists on
return null;
}
@Override
public Object visitPutMapCommand(InvocationContext ctx, PutMapCommand command) throws Throwable {
// don't bother with a remote get for the PutMapCommand!
return handleWriteCommand(ctx, command,
new MultipleKeysRecipientGenerator(command.getMap().keySet()), true, false);
}
@Override
public Object visitRemoveCommand(InvocationContext ctx, RemoveCommand command) throws Throwable {
return handleWriteCommand(ctx, command,
new SingleKeyRecipientGenerator(command.getKey()), false, false);
}
@Override
public Object visitReplaceCommand(InvocationContext ctx, ReplaceCommand command) throws Throwable {
return handleWriteCommand(ctx, command,
new SingleKeyRecipientGenerator(command.getKey()), false, false);
}
protected abstract Object handleWriteCommand(InvocationContext ctx, WriteCommand command, RecipientGenerator recipientGenerator, boolean skipRemoteGet, boolean skipL1Invalidation) throws Throwable;
/**
* If a single owner has been configured and the target for the key is the local address, it returns true.
*/
protected boolean isSingleOwnerAndLocal(RecipientGenerator recipientGenerator) {
List<Address> recipients;
return cacheConfiguration.clustering().hash().numOwners() == 1
&& (recipients = recipientGenerator.generateRecipients()) != null
&& recipients.size() == 1
&& recipients.get(0).equals(rpcManager.getTransport().getAddress());
}
interface KeyGenerator {
Collection<Object> getKeys();
}
interface RecipientGenerator extends KeyGenerator {
List<Address> generateRecipients();
}
class SingleKeyRecipientGenerator implements RecipientGenerator {
private final Object key;
private final Set<Object> keys;
private List<Address> recipients = null;
SingleKeyRecipientGenerator(Object key) {
this.key = key;
keys = Collections.singleton(key);
}
@Override
public List<Address> generateRecipients() {
if (recipients == null) recipients = dm.locate(key);
return recipients;
}
@Override
public Collection<Object> getKeys() {
return keys;
}
}
class MultipleKeysRecipientGenerator implements RecipientGenerator {
private final Collection<Object> keys;
private List<Address> recipients = null;
MultipleKeysRecipientGenerator(Collection<Object> keys) {
this.keys = keys;
}
@Override
public List<Address> generateRecipients() {
if (recipients == null) {
Set<Address> addresses = dm.locateAll(keys);
recipients = Immutables.immutableListConvert(addresses);
}
return recipients;
}
@Override
public Collection<Object> getKeys() {
return keys;
}
}
}