com.gemstone.gemfire.internal.cache.RemoteFetchVersionMessage Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of gemfire-core Show documentation
Show all versions of gemfire-core Show documentation
SnappyData store based off Pivotal GemFireXD
/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* Licensed 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. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.internal.cache;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Set;
import com.gemstone.gemfire.DataSerializer;
import com.gemstone.gemfire.cache.CacheException;
import com.gemstone.gemfire.cache.EntryNotFoundException;
import com.gemstone.gemfire.distributed.internal.DM;
import com.gemstone.gemfire.distributed.internal.DistributionManager;
import com.gemstone.gemfire.distributed.internal.DistributionMessage;
import com.gemstone.gemfire.distributed.internal.InternalDistributedSystem;
import com.gemstone.gemfire.distributed.internal.ReplyException;
import com.gemstone.gemfire.distributed.internal.ReplyMessage;
import com.gemstone.gemfire.distributed.internal.ReplyProcessor21;
import com.gemstone.gemfire.distributed.internal.membership.InternalDistributedMember;
import com.gemstone.gemfire.i18n.LogWriterI18n;
import com.gemstone.gemfire.internal.NanoTimer;
import com.gemstone.gemfire.internal.cache.versions.VersionTag;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;
/**
* This message is used to request a VersionTag from a remote member.
*
* DistributedRegions with DataPolicy EMPTY, NORMAL, PRELOADED, can use
* this message to fetch VersionTag for a key.
*
* @author sbawaska
* @since 7.0
*/
public final class RemoteFetchVersionMessage extends RemoteOperationMessage {
private Object key;
/** for deserialization */
public RemoteFetchVersionMessage() {
}
/**
* Send RemoteFetchVersionMessage to the recipient for the given key
* @param recipient
* @param r
* @param key
* @return the processor used to fetch the VersionTag for the key
* @throws RemoteOperationException if the member is no longer available
*/
public static FetchVersionResponse send(InternalDistributedMember recipient,
LocalRegion r, Object key) throws RemoteOperationException {
FetchVersionResponse response = new FetchVersionResponse(r.getSystem(),
recipient);
RemoteFetchVersionMessage msg = new RemoteFetchVersionMessage(recipient, r,
response, key);
Set failures = r.getDistributionManager().putOutgoing(msg);
if (failures != null && failures.size() > 0) {
throw new RemoteOperationException(
LocalizedStrings.GetMessage_FAILED_SENDING_0.toLocalizedString(msg));
}
return response;
}
private RemoteFetchVersionMessage(InternalDistributedMember recipient,
LocalRegion r, ReplyProcessor21 processor, Object key) {
super(recipient, r, processor, null);
this.key = key;
}
@Override
public int getDSFID() {
return R_FETCH_VERSION_MESSAGE;
}
@Override
public boolean isSevereAlertCompatible() {
// allow forced-disconnect processing for all cache op messages
return true;
}
@Override
protected int getMessageProcessorType() {
return DistributionManager.SERIAL_EXECUTOR;
}
@Override
public void fromData(DataInput in) throws IOException,
ClassNotFoundException {
super.fromData(in);
this.key = DataSerializer.readObject(in);
}
@Override
public void toData(DataOutput out) throws IOException {
super.toData(out);
DataSerializer.writeObject(this.key, out);
}
@Override
protected short computeCompressedShort(short flags) {
return flags;
}
@Override
protected boolean operateOnRegion(DistributionManager dm, LocalRegion r,
long startTime) throws RemoteOperationException {
if (!(r instanceof PartitionedRegion)) {
r.waitOnInitialization();
}
VersionTag tag;
try {
if (r.keyRequiresRegionContext()) {
((KeyWithRegionContext) this.key).setRegionContext(r);
}
RegionEntry re = r.getRegionEntry(key);
if (re == null) {
if (DistributionManager.VERBOSE) {
dm.getLoggerI18n().fine("RemoteFetchVersionMessage did not find entry for key:"+key);
}
r.checkEntryNotFound(key);
}
tag = re.getVersionStamp().asVersionTag();
if (DistributionManager.VERBOSE) {
dm.getLoggerI18n().fine("RemoteFetchVersionMessage for key:"+key+" returning tag:"+tag);
}
FetchVersionReplyMessage.send(getSender(), processorId, tag, dm);
} catch (EntryNotFoundException e) {
sendReply(getSender(), getProcessorId(), dm, new ReplyException(e), r,
startTime);
}
return false;
}
/**
* This message is used to send a reply for RemoteFetchVersionMessage.
*
* @author sbawaska
*/
public static final class FetchVersionReplyMessage extends ReplyMessage {
private VersionTag tag;
/** for deserialization */
public FetchVersionReplyMessage() {
}
private FetchVersionReplyMessage(int processorId, VersionTag tag) {
setProcessorId(processorId);
this.tag = tag;
}
public static void send(InternalDistributedMember recipient,
int processorId, VersionTag tag, DM dm) {
FetchVersionReplyMessage reply = new FetchVersionReplyMessage(
processorId, tag);
reply.setRecipient(recipient);
dm.putOutgoing(reply);
}
@Override
public void process(DM dm, ReplyProcessor21 processor) {
final long startTime = getTimestamp();
LogWriterI18n l = dm.getLoggerI18n();
if (DistributionManager.VERBOSE) {
l.fine("FetchVersionReplyMessage process invoking reply processor with processorId:"
+ this.processorId);
}
if (processor == null) {
if (DistributionManager.VERBOSE) {
l.fine("FetchVersionReplyMessage processor not found");
}
return;
}
processor.process(this);
if (DistributionManager.VERBOSE) {
LogWriterI18n logger = dm.getLoggerI18n();
logger.info(LocalizedStrings.RemoteFetchEntryMessage_0__PROCESSED__1,
new Object[] { processor, this });
}
dm.getStats().incReplyMessageTime(NanoTimer.getTime() - startTime);
}
@Override
public int getDSFID() {
return R_FETCH_VERSION_REPLY;
}
@Override
public void toData(DataOutput out) throws IOException {
super.toData(out);
DataSerializer.writeObject(this.tag, out);
}
@Override
public void fromData(DataInput in) throws IOException,
ClassNotFoundException {
super.fromData(in);
this.tag = DataSerializer.readObject(in);
}
}
/**
* A processor to capture the VersionTag returned by RemoteFetchVersion message.
*
* @author sbawaska
*/
public static class FetchVersionResponse extends RemoteOperationResponse {
private volatile VersionTag tag;
public FetchVersionResponse(InternalDistributedSystem dm,
InternalDistributedMember member) {
super(dm, member, true);
}
@Override
public void process(DistributionMessage msg) {
try {
if (msg instanceof FetchVersionReplyMessage) {
FetchVersionReplyMessage reply = (FetchVersionReplyMessage) msg;
this.tag = reply.tag;
if (DistributionManager.VERBOSE || getDistributionManager().getLoggerI18n().fineEnabled()) {
getDistributionManager().getLoggerI18n().fine(
"FetchVersionResponse return tag is " + this.tag);
}
}
} finally {
super.process(msg);
}
}
public VersionTag waitForResponse() throws RemoteOperationException {
try {
waitForCacheException();
} catch (RemoteOperationException e) {
getDistributionManager().getLoggerI18n().fine("RemoteFetchVersionMessage threw", e);
throw e;
} catch (EntryNotFoundException e) {
getDistributionManager().getLoggerI18n().fine("RemoteFetchVersionMessage threw", e);
throw e;
} catch (CacheException e) {
getDistributionManager().getLoggerI18n().fine("RemoteFetchVersionMessage threw", e);
throw new RemoteOperationException("RemoteFetchVersionMessage threw exception", e);
}
return tag;
}
}
}