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/*
* 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.DataSerializable;
import org.apache.geode.DataSerializer;
import org.apache.geode.admin.OperationCancelledException;
import org.apache.geode.cache.CacheException;
import org.apache.geode.cache.EntryNotFoundException;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.RegionDestroyedException;
import org.apache.geode.cache.TransactionException;
import org.apache.geode.distributed.internal.DM;
import org.apache.geode.distributed.internal.DistributionManager;
import org.apache.geode.distributed.internal.DistributionMessage;
import org.apache.geode.distributed.internal.InternalDistributedSystem;
import org.apache.geode.distributed.internal.ReplyException;
import org.apache.geode.distributed.internal.ReplyMessage;
import org.apache.geode.distributed.internal.ReplyProcessor21;
import org.apache.geode.distributed.internal.membership.InternalDistributedMember;
import org.apache.geode.internal.Assert;
import org.apache.geode.internal.InternalDataSerializer;
import org.apache.geode.internal.NanoTimer;
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 as the request for a
* {@link org.apache.geode.cache.Region#getEntry(Object)}operation. The reply is sent in a
* {@link org.apache.geode.internal.cache.RemoteFetchEntryMessage.FetchEntryReplyMessage}.
*
* @since GemFire 5.1
*/
public final class RemoteFetchEntryMessage extends RemoteOperationMessage {
private static final Logger logger = LogService.getLogger();
private Object key;
/**
* Empty constructor to satisfy {@link DataSerializer} requirements
*/
public RemoteFetchEntryMessage() {}
private RemoteFetchEntryMessage(InternalDistributedMember recipient, String regionPath,
ReplyProcessor21 processor, final Object key) {
super(recipient, regionPath, processor);
this.key = key;
}
/**
* Sends a LocalRegion {@link org.apache.geode.cache.Region#getEntry(Object)} message
*
* @param recipient the member that the getEntry message is sent to
* @param r the Region for which getEntry was performed upon
* @param key the object to which the value should be feteched
* @return the processor used to fetch the returned value associated with the key
* @throws RemoteOperationException if the peer is no longer available
*/
public static FetchEntryResponse send(InternalDistributedMember recipient, LocalRegion r,
final Object key) throws RemoteOperationException {
Assert.assertTrue(recipient != null, "RemoteFetchEntryMessage NULL recipient");
FetchEntryResponse p =
new FetchEntryResponse(r.getSystem(), Collections.singleton(recipient), r, key);
RemoteFetchEntryMessage m = new RemoteFetchEntryMessage(recipient, r.getFullPath(), p, key);
Set failures = r.getDistributionManager().putOutgoing(m);
if (failures != null && failures.size() > 0) {
throw new RemoteOperationException(
LocalizedStrings.RemoteFetchEntryMessage_FAILED_SENDING_0.toLocalizedString(m));
}
return p;
}
// final public int getProcessorType()
// {
// return DistributionManager.PARTITIONED_REGION_EXECUTOR;
// }
@Override
public boolean isSevereAlertCompatible() {
// allow forced-disconnect processing for all cache op messages
return true;
}
@Override
protected final boolean operateOnRegion(DistributionManager dm, LocalRegion r, long startTime)
throws RemoteOperationException {
// RemoteFetchEntryMessage is used in refreshing client caches during interest list recovery,
// so don't be too verbose or hydra tasks may time out
if (!(r instanceof PartitionedRegion)) {
r.waitOnInitialization(); // bug #43371 - accessing a region before it's initialized
}
EntrySnapshot val;
try {
final KeyInfo keyInfo = r.getKeyInfo(key);
Region.Entry re = r.getDataView().getEntry(keyInfo, r, true);
if (re == null) {
r.checkEntryNotFound(key);
}
NonLocalRegionEntry nlre = new NonLocalRegionEntry(re, r);
LocalRegion dataReg = r.getDataRegionForRead(keyInfo);
val = new EntrySnapshot(nlre, dataReg, r, false);
// r.getPrStats().endRemoteOperationMessagesProcessing(startTime);
FetchEntryReplyMessage.send(getSender(), getProcessorId(), val, dm, null);
} catch (TransactionException tex) {
FetchEntryReplyMessage.send(getSender(), getProcessorId(), null, dm, new ReplyException(tex));
} catch (EntryNotFoundException enfe) {
FetchEntryReplyMessage.send(getSender(), getProcessorId(), null, dm, new ReplyException(
LocalizedStrings.RemoteFetchEntryMessage_ENTRY_NOT_FOUND.toLocalizedString(), enfe));
} catch (PrimaryBucketException pbe) {
FetchEntryReplyMessage.send(getSender(), getProcessorId(), null, dm, new ReplyException(pbe));
}
// 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("; key=").append(this.key);
}
public int getDSFID() {
return R_FETCH_ENTRY_MESSAGE;
}
@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);
}
public void setKey(Object key) {
this.key = key;
}
/**
* This message is used for the reply to a {@link RemoteFetchEntryMessage}.
*
* @since GemFire 5.0
*/
public static final class FetchEntryReplyMessage extends ReplyMessage {
/** Propagated exception from remote node to operation initiator */
private EntrySnapshot value;
/**
* Empty constructor to conform to DataSerializable interface
*/
public FetchEntryReplyMessage() {}
private FetchEntryReplyMessage(int processorId, EntrySnapshot value, ReplyException re) {
this.processorId = processorId;
this.value = value;
setException(re);
}
/** Send an ack */
public static void send(InternalDistributedMember recipient, int processorId,
EntrySnapshot value, DM dm, ReplyException re) {
Assert.assertTrue(recipient != null, "FetchEntryReplyMessage NULL recipient");
FetchEntryReplyMessage m = new FetchEntryReplyMessage(processorId, value, re);
m.setRecipient(recipient);
dm.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, final ReplyProcessor21 processor) {
final boolean isDebugEnabled = logger.isTraceEnabled(LogMarker.DM);
final long startTime = getTimestamp();
if (isDebugEnabled) {
logger.trace(LogMarker.DM,
"FetchEntryReplyMessage process invoking reply processor with processorId:{}",
this.processorId);
}
if (processor == null) {
if (isDebugEnabled) {
logger.trace(LogMarker.DM, "FetchEntryReplyMessage processor not found");
}
return;
}
processor.process(this);
if (isDebugEnabled) {
logger.trace(LogMarker.DM, "{} processed {}", processor, this);
}
dm.getStats().incReplyMessageTime(NanoTimer.getTime() - startTime);
}
public EntrySnapshot getValue() {
return this.value;
}
@Override
public void toData(DataOutput out) throws IOException {
super.toData(out);
if (this.value == null) {
out.writeBoolean(true); // null entry
} else {
out.writeBoolean(false); // null entry
InternalDataSerializer.invokeToData((DataSerializable) this.value, out);
}
}
@Override
public int getDSFID() {
return R_FETCH_ENTRY_REPLY_MESSAGE;
}
@Override
public void fromData(DataInput in) throws IOException, ClassNotFoundException {
super.fromData(in);
boolean nullEntry = in.readBoolean();
if (!nullEntry) {
// since the Entry object shares state with the PartitionedRegion,
// we have to find the region and ask it to create a new Entry instance
// to be populated from the DataInput
FetchEntryResponse processor =
(FetchEntryResponse) ReplyProcessor21.getProcessor(this.processorId);
if (processor == null) {
throw new OperationCancelledException("This operation was cancelled (null processor)");
}
this.value = new EntrySnapshot(in, processor.region);
}
}
@Override
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("FetchEntryReplyMessage ").append("processorid=").append(this.processorId)
.append(" reply to sender ").append(this.getSender()).append(" returning value=")
.append(this.value);
return sb.toString();
}
}
/**
* A processor to capture the value returned by
* {@link org.apache.geode.internal.cache.RemoteFetchEntryMessage.FetchEntryReplyMessage}
*
*/
public static class FetchEntryResponse extends RemoteOperationResponse {
private volatile EntrySnapshot returnValue;
final LocalRegion region;
final Object key;
public FetchEntryResponse(InternalDistributedSystem ds, Set recipients, LocalRegion theRegion,
Object key) {
super(ds, recipients);
this.region = theRegion;
this.key = key;
}
@Override
public void process(DistributionMessage msg) {
try {
if (msg instanceof FetchEntryReplyMessage) {
FetchEntryReplyMessage reply = (FetchEntryReplyMessage) msg;
this.returnValue = reply.getValue();
if (logger.isTraceEnabled(LogMarker.DM)) {
logger.trace(LogMarker.DM, "FetchEntryResponse return value is {}", this.returnValue);
}
}
} finally {
super.process(msg);
}
}
/**
* @return Object associated with the key that was sent in the get message
* @throws EntryNotFoundException
* @throws RemoteOperationException if the peer is no longer available
* @throws EntryNotFoundException
*/
public EntrySnapshot waitForResponse() throws EntryNotFoundException, RemoteOperationException {
try {
// waitForRepliesUninterruptibly();
waitForCacheException();
} catch (RemoteOperationException e) {
e.checkKey(key);
final String msg = "FetchEntryResponse got remote RemoteOperationException; rethrowing";
logger.debug(msg, e);
throw e;
} catch (EntryNotFoundException e) {
throw e;
} catch (TransactionException e) {
throw e;
} catch (RegionDestroyedException e) {
throw e;
} catch (CacheException ce) {
logger.debug("FetchEntryResponse got remote CacheException; forcing reattempt.", ce);
throw new RemoteOperationException(
LocalizedStrings.RemoteFetchEntryMessage_FETCHENTRYRESPONSE_GOT_REMOTE_CACHEEXCEPTION_FORCING_REATTEMPT
.toLocalizedString(),
ce);
}
return this.returnValue;
}
}
}
