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* Copyright 2012 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 copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.infinispan.interceptors.distribution;
import org.infinispan.CacheException;
import org.infinispan.commands.read.GetKeyValueCommand;
import org.infinispan.commands.write.ClearCommand;
import org.infinispan.commands.write.PutKeyValueCommand;
import org.infinispan.commands.write.WriteCommand;
import org.infinispan.container.entries.InternalCacheEntry;
import org.infinispan.context.Flag;
import org.infinispan.context.InvocationContext;
import org.infinispan.remoting.responses.Response;
import org.infinispan.remoting.responses.SuccessfulResponse;
import org.infinispan.remoting.transport.Address;
import org.infinispan.remoting.transport.jgroups.SuspectException;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
import java.util.List;
import java.util.Map;
/**
* Handles the distribution of the non-transactional caches.
*
* @author Mircea Markus
* @since 5.2
*/
public class NonTxDistributionInterceptor extends BaseDistributionInterceptor {
private static Log log = LogFactory.getLog(NonTxDistributionInterceptor.class);
@Override
public Object visitGetKeyValueCommand(InvocationContext ctx, GetKeyValueCommand command) throws Throwable {
try {
Object returnValue = invokeNextInterceptor(ctx, command);
if (needsRemoteGet(ctx, command, returnValue == null)) {
Object key = command.getKey();
returnValue = shouldFetchFromRemote(ctx, key) ? remoteGet(ctx, key, command) : null;
}
return returnValue;
} catch (SuspectException e) {
// retry
return visitGetKeyValueCommand(ctx, command);
}
}
@Override
public Object visitPutKeyValueCommand(InvocationContext ctx, PutKeyValueCommand command) throws Throwable {
SingleKeyRecipientGenerator skrg = new SingleKeyRecipientGenerator(command.getKey());
return handleWriteCommand(ctx, command, skrg, command.hasFlag(Flag.PUT_FOR_STATE_TRANSFER), false);
}
/**
* Don't forward in the case of clear commands, just acquire local locks and broadcast.
*/
@Override
public Object visitClearCommand(InvocationContext ctx, ClearCommand command) throws Throwable {
if (ctx.isOriginLocal() && !isLocalModeForced(command)) {
rpcManager.broadcastRpcCommand(command, isSynchronous(command));
}
return invokeNextInterceptor(ctx, command);
}
protected Object handleWriteCommand(InvocationContext ctx, WriteCommand command, RecipientGenerator recipientGenerator, boolean skipRemoteGet, boolean skipL1Invalidation) throws Throwable {
// if this is local mode then skip distributing
if (isLocalModeForced(command)) {
return invokeNextInterceptor(ctx, command);
}
if (!ctx.isOriginLocal()) {
Object returnValue = invokeNextInterceptor(ctx, command);
handleRemoteWrite(ctx, command, recipientGenerator, skipL1Invalidation, isSynchronous(command));
return returnValue;
} else {
return handleLocalWrite(ctx, command, recipientGenerator, skipL1Invalidation, isSynchronous(command));
}
}
protected Object handleLocalWrite(InvocationContext ctx, WriteCommand command, RecipientGenerator rg, boolean skipL1Invalidation, boolean sync) throws Throwable {
Object returnValue = invokeNextInterceptor(ctx, command);
if (!isSingleOwnerAndLocal(rg)) {
List<Address> recipients = rg.generateRecipients();
if (recipients.contains(rpcManager.getAddress()) && (!command.isSuccessful())) {
log.trace("Skipping remote invocation as the command hasn't executed correctly on owner");
} else {
Map<Address, Response> responseMap = rpcManager.invokeRemotely(recipients, command, sync);
Address mainOwner;
boolean equals = (mainOwner = recipients.get(0)).equals(rpcManager.getAddress());
if (sync && !recipients.isEmpty() && !equals) {
returnValue = getResponseFromPrimaryOwner(mainOwner, responseMap);
}
}
}
return returnValue;
}
protected void handleRemoteWrite(InvocationContext ctx, WriteCommand command, RecipientGenerator recipientGenerator, boolean skipL1Invalidation, boolean sync) throws Throwable {}
private Object remoteGet(InvocationContext ctx, Object key, GetKeyValueCommand command) throws Throwable {
if (trace) log.tracef("Doing a remote get for key %s", key);
InternalCacheEntry ice = dm.retrieveFromRemoteSource(key, ctx, false, command);
command.setRemotelyFetchedValue(ice);
if (ice != null) {
return ice.getValue();
}
return null;
}
protected Object getResponseFromPrimaryOwner(Address primaryOwner, Map<Address, Response> addressResponseMap) {
if (addressResponseMap.isEmpty() || addressResponseMap.get(primaryOwner) == null) {
return null;
}
Response fromPrimaryOwner = addressResponseMap.get(primaryOwner);
if (!fromPrimaryOwner.isSuccessful()) {
throw new CacheException("Got unsuccessful response" + fromPrimaryOwner);
} else {
return ((SuccessfulResponse) fromPrimaryOwner).getResponseValue();
}
}
}