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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
/*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional information regarding
* copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License. You may obtain a
* copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package org.apache.geode.internal.cache;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Collections;
import java.util.Set;
import org.apache.logging.log4j.Logger;
import org.apache.geode.DataSerializer;
import org.apache.geode.cache.CacheException;
import org.apache.geode.cache.RegionDestroyedException;
import org.apache.geode.distributed.internal.DM;
import org.apache.geode.distributed.internal.DirectReplyProcessor;
import org.apache.geode.distributed.internal.DistributionManager;
import org.apache.geode.distributed.internal.DistributionMessage;
import org.apache.geode.distributed.internal.DistributionStats;
import org.apache.geode.distributed.internal.InternalDistributedSystem;
import org.apache.geode.distributed.internal.ReplyMessage;
import org.apache.geode.distributed.internal.ReplyProcessor21;
import org.apache.geode.distributed.internal.ReplySender;
import org.apache.geode.distributed.internal.membership.InternalDistributedMember;
import org.apache.geode.internal.Assert;
import org.apache.geode.internal.i18n.LocalizedStrings;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.internal.logging.log4j.LogMarker;
/**
* This message is used be a replicate region to send a contains key/value request to another peer.
*
* @since GemFire 6.5
*/
public final class RemoteContainsKeyValueMessage extends RemoteOperationMessageWithDirectReply {
private static final Logger logger = LogService.getLogger();
private boolean valueCheck;
private Object key;
protected static final short VALUE_CHECK = UNRESERVED_FLAGS_START;
public RemoteContainsKeyValueMessage() {}
public RemoteContainsKeyValueMessage(InternalDistributedMember recipient, String regionPath,
DirectReplyProcessor processor, Object key, boolean valueCheck) {
super(recipient, regionPath, processor);
this.valueCheck = valueCheck;
this.key = key;
}
/**
* Sends a ReplicateRegion message for either
* {@link org.apache.geode.cache.Region#containsKey(Object)}or
* {@link org.apache.geode.cache.Region#containsValueForKey(Object)} depending on the
* valueCheck argument
*
* @param recipient the member that the contains keys/value message is sent to
* @param r the LocalRegion
* @param key the key to be queried
* @param valueCheck true if {@link org.apache.geode.cache.Region#containsValueForKey(Object)} is
* desired, false if {@link org.apache.geode.cache.Region#containsKey(Object)}is desired
* @return the processor used to read the returned keys
*/
public static RemoteContainsKeyValueResponse send(InternalDistributedMember recipient,
LocalRegion r, Object key, boolean valueCheck) throws RemoteOperationException {
Assert.assertTrue(recipient != null,
"PRDistribuedRemoteContainsKeyValueMessage NULL reply message");
RemoteContainsKeyValueResponse p =
new RemoteContainsKeyValueResponse(r.getSystem(), Collections.singleton(recipient), key);
RemoteContainsKeyValueMessage m =
new RemoteContainsKeyValueMessage(recipient, r.getFullPath(), p, key, valueCheck);
Set failures = r.getDistributionManager().putOutgoing(m);
if (failures != null && failures.size() > 0) {
throw new RemoteOperationException(LocalizedStrings.FAILED_SENDING_0.toLocalizedString(m));
}
return p;
}
@Override
public boolean isSevereAlertCompatible() {
// allow forced-disconnect processing for all cache op messages
return true;
}
@Override
protected boolean operateOnRegion(DistributionManager dm, LocalRegion r, long startTime)
throws CacheException, RemoteOperationException {
if (logger.isTraceEnabled(LogMarker.DM)) {
logger.trace(LogMarker.DM, "DistributedRemoteContainsKeyValueMessage operateOnRegion: {}",
r.getFullPath());
}
if (!(r instanceof PartitionedRegion)) { // prs already wait on initialization
r.waitOnInitialization(); // bug #43371 - accessing a region before it's initialized
}
final boolean replyVal;
if (this.valueCheck) {
replyVal = r.containsValueForKey(this.key);
} else {
replyVal = r.containsKey(this.key);
}
if (logger.isTraceEnabled(LogMarker.DM)) {
logger.debug(
"DistributedRemoteContainsKeyValueMessage sending reply back using processorId: {}",
getProcessorId());
}
// r.getPrStats().endPartitionMessagesProcessing(startTime);
RemoteContainsKeyValueReplyMessage.send(getSender(), getProcessorId(), getReplySender(dm),
replyVal);
// Unless there was an exception thrown, this message handles sending the
// response
return false;
}
@Override
protected void appendFields(StringBuffer buff) {
super.appendFields(buff);
buff.append("; valueCheck=").append(this.valueCheck).append("; key=").append(this.key);
}
public int getDSFID() {
return R_CONTAINS_MESSAGE;
}
@Override
public void fromData(DataInput in) throws IOException, ClassNotFoundException {
super.fromData(in);
this.key = DataSerializer.readObject(in);
this.valueCheck = (flags & VALUE_CHECK) != 0;
}
@Override
public void toData(DataOutput out) throws IOException {
super.toData(out);
DataSerializer.writeObject(this.key, out);
}
@Override
protected short computeCompressedShort() {
short flags = super.computeCompressedShort();
if (this.valueCheck)
flags |= VALUE_CHECK;
return flags;
}
public static final class RemoteContainsKeyValueReplyMessage extends ReplyMessage {
/** Propagated exception from remote node to operation initiator */
private boolean containsKeyValue;
/**
* Empty constructor to conform to DataSerializable interface
*/
public RemoteContainsKeyValueReplyMessage() {}
private RemoteContainsKeyValueReplyMessage(int processorId, boolean containsKeyValue) {
this.processorId = processorId;
this.containsKeyValue = containsKeyValue;
}
/** Send an ack */
public static void send(InternalDistributedMember recipient, int processorId,
ReplySender replySender, boolean containsKeyValue) {
Assert.assertTrue(recipient != null, "ContainsKeyValueReplyMessage NULL reply message");
RemoteContainsKeyValueReplyMessage m =
new RemoteContainsKeyValueReplyMessage(processorId, containsKeyValue);
m.setRecipient(recipient);
replySender.putOutgoing(m);
}
/**
* Processes this message. This method is invoked by the receiver of the message.
*
* @param dm the distribution manager that is processing the message.
*/
@Override
public void process(final DM dm, ReplyProcessor21 processor) {
final long startTime = getTimestamp();
if (processor == null) {
if (logger.isTraceEnabled(LogMarker.DM)) {
logger.trace(LogMarker.DM, "ContainsKeyValueReplyMessage processor not found");
}
return;
}
processor.process(this);
dm.getStats().incReplyMessageTime(DistributionStats.getStatTime() - startTime);
}
@Override
public int getDSFID() {
return R_CONTAINS_REPLY_MESSAGE;
}
@Override
public void fromData(DataInput in) throws IOException, ClassNotFoundException {
super.fromData(in);
this.containsKeyValue = in.readBoolean();
}
@Override
public void toData(DataOutput out) throws IOException {
super.toData(out);
out.writeBoolean(this.containsKeyValue);
}
@Override
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("ContainsKeyValueReplyMessage ").append("processorid=").append(this.processorId)
.append(" reply to sender ").append(this.getSender())
.append(" returning containsKeyValue=").append(doesItContainKeyValue());
return sb.toString();
}
public boolean doesItContainKeyValue() {
return this.containsKeyValue;
}
}
/**
* A processor to capture the value returned by
* {@link org.apache.geode.internal.cache.RemoteContainsKeyValueMessage.RemoteContainsKeyValueReplyMessage}
*
* @since GemFire 6.5
*/
public static class RemoteContainsKeyValueResponse extends RemoteOperationResponse {
private volatile boolean returnValue;
private volatile boolean returnValueReceived;
final Object key;
public RemoteContainsKeyValueResponse(InternalDistributedSystem ds, Set recipients,
Object key) {
super(ds, recipients, false);
this.key = key;
}
@Override
public void process(DistributionMessage msg) {
try {
if (msg instanceof RemoteContainsKeyValueReplyMessage) {
RemoteContainsKeyValueReplyMessage reply = (RemoteContainsKeyValueReplyMessage) msg;
this.returnValue = reply.doesItContainKeyValue();
this.returnValueReceived = true;
if (logger.isTraceEnabled(LogMarker.DM)) {
logger.trace(LogMarker.DM, "ContainsKeyValueResponse return value is {}",
this.returnValue);
}
}
} finally {
super.process(msg);
}
}
/**
* @return Set the keys associated with the ReplicateRegion of the
* {@link RemoteContainsKeyValueMessage}
* @throws PrimaryBucketException if the instance of the bucket that received this operation was
* not primary
*/
public boolean waitForContainsResult() throws PrimaryBucketException, RemoteOperationException {
try {
waitForCacheException();
} catch (RemoteOperationException rce) {
rce.checkKey(key);
throw rce;
} catch (PrimaryBucketException pbe) {
// Is this necessary?
throw pbe;
} catch (RegionDestroyedException e) {
throw e;
} catch (CacheException ce) {
logger.debug("ContainsKeyValueResponse got remote CacheException; forcing reattempt.", ce);
throw new RemoteOperationException(
LocalizedStrings.RemoteContainsKeyValueMessage_CONTAINSKEYVALUERESPONSE_GOT_REMOTE_CACHEEXCEPTION
.toLocalizedString(),
ce);
}
if (!this.returnValueReceived) {
throw new RemoteOperationException(
LocalizedStrings.RemoteContainsKeyValueMessage_NO_RETURN_VALUE_RECEIVED
.toLocalizedString());
}
return this.returnValue;
}
}
}