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/*
* 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.Map;
import java.util.Set;
import com.gemstone.gemfire.CancelException;
import com.gemstone.gemfire.DataSerializer;
import com.gemstone.gemfire.SystemFailure;
import com.gemstone.gemfire.cache.CacheClosedException;
import com.gemstone.gemfire.cache.CacheException;
import com.gemstone.gemfire.cache.CacheFactory;
import com.gemstone.gemfire.cache.LowMemoryException;
import com.gemstone.gemfire.cache.Operation;
import com.gemstone.gemfire.cache.RegionDestroyedException;
import com.gemstone.gemfire.distributed.DistributedSystemDisconnectedException;
import com.gemstone.gemfire.distributed.internal.DM;
import com.gemstone.gemfire.distributed.internal.DirectReplyProcessor;
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.MessageWithReply;
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.Assert;
import com.gemstone.gemfire.internal.cache.partitioned.PutMessage;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;
import com.gemstone.gnu.trove.THashMap;
/**
* The base PartitionedRegion message type upon which other messages should be
* based.
*
* @author mthomas
* @author bruce
* @since 6.5
*/
public abstract class RemoteOperationMessage extends AbstractOperationMessage
implements MessageWithReply {
/** default exception to ensure a false-positive response is never returned */
static final ForceReattemptException UNHANDLED_EXCEPTION
= (ForceReattemptException)new ForceReattemptException(LocalizedStrings
.PartitionMessage_UNKNOWN_EXCEPTION.toLocalizedString())
.fillInStackTrace();
protected String regionPath;
public RemoteOperationMessage() {
}
public RemoteOperationMessage(InternalDistributedMember recipient,
LocalRegion r, ReplyProcessor21 processor, TXStateInterface tx) {
super(tx);
Assert.assertTrue(recipient != null,
"PartitionMesssage recipient can not be null");
setRecipient(recipient);
this.regionPath = r.getFullPath();
this.processorId = processor == null ? 0 : processor.getProcessorId();
if (processor != null && this.isSevereAlertCompatible()) {
processor.enableSevereAlertProcessing();
}
// note that Operation above may not be reliable but just gives an idea of
// the type of operation i.e. read or write which is enough for
// IndexUpdater.hasRemoteOperations
//initProcessorType(r, op);
// check for TX match with that in thread-local
final TXStateInterface currentTX;
assert tx == (currentTX = TXManagerImpl.getCurrentTXState()):
"unexpected mismatch of current TX " + currentTX
+ ", and TX passed to message " + tx;
}
public RemoteOperationMessage(Set recipients, LocalRegion r,
ReplyProcessor21 processor, TXStateInterface tx) {
super(tx);
if (recipients != null) {
setRecipients(recipients);
}
this.regionPath = r.getFullPath();
this.processorId = processor == null ? 0 : processor.getProcessorId();
if (processor != null && this.isSevereAlertCompatible()) {
processor.enableSevereAlertProcessing();
}
// note that Operation above may not be reliable but just gives an idea of
// the type of operation i.e. read or write which is enough for
// IndexUpdater.hasRemoteOperations
//initProcessorType(r, op);
// check for TX match with that in thread-local
final TXStateInterface currentTX;
assert tx == (currentTX = TXManagerImpl.getCurrentTXState()):
"unexpected mismatch of current TX " + currentTX
+ ", and TX passed to message " + tx;
}
/**
* Copy constructor that initializes the fields declared in this class
* @param other
*/
public RemoteOperationMessage(RemoteOperationMessage other) {
super(other);
this.regionPath = other.regionPath;
}
/**
* Severe alert processing enables suspect processing at the ack-wait-threshold
* and issuing of a severe alert at the end of the ack-severe-alert-threshold.
* Some messages should not support this type of processing
* (e.g., GII, or DLockRequests)
* @return whether severe-alert processing may be performed on behalf
* of this message
*/
@Override
public boolean isSevereAlertCompatible() {
return true;
}
protected int getMessageProcessorType() {
// don't use SERIAL_EXECUTOR if we may have to wait for a pending TX
// else if may deadlock as the p2p msg reader thread will be blocked
// also don't use SERIAL_EXECUTOR for putAll
// if this thread is a pool processor thread then use WAITING_POOL_EXECUTOR
// to avoid deadlocks (#42459, #44913)
/*
final IndexUpdater indexUpdater;
if (this.pendingTXId != null || op.isPutAll()
|| ((indexUpdater = r.getIndexUpdater()) != null && indexUpdater
.avoidSerialExecutor(op))) {
// ordering is not an issue here since these ops are always transactional
this.processorType = DistributionManager.PARTITIONED_REGION_EXECUTOR;
}
*/
return DistributionManager.PARTITIONED_REGION_EXECUTOR;
}
@Override
public int getProcessorType() {
return this.processorType == 0 ? getMessageProcessorType()
: this.processorType;
}
@Override
public final void setProcessorType(boolean isReaderThread) {
if (isReaderThread) {
this.processorType = DistributionManager.WAITING_POOL_EXECUTOR;
}
}
/**
* @return the full path of the region
*/
public final String getRegionPath() {
return regionPath;
}
/**
* @param processorId1
* the
* {@link com.gemstone.gemfire.distributed.internal.ReplyProcessor21}
* id associated with the message, null if no acknowlegement is
* required.
*/
public final void registerProcessor(int processorId1) {
this.processorId = processorId1;
}
/**
* check to see if the cache is closing
*/
final public boolean checkCacheClosing(DistributionManager dm) {
GemFireCacheImpl cache = GemFireCacheImpl.getInstance();
// return (cache != null && cache.isClosed());
return cache == null || cache.isClosed();
}
/**
* check to see if the distributed system is closing
*
* @return true if the distributed system is closing
*/
final public boolean checkDSClosing(DistributionManager dm) {
InternalDistributedSystem ds = dm.getSystem();
return (ds == null || ds.isDisconnecting());
}
/**
* Upon receipt of the message, both process the message and send an
* acknowledgement, not necessarily in that order. Note: Any hang in this
* message may cause a distributed deadlock for those threads waiting for an
* acknowledgement.
*
* @throws PartitionedRegionException
* if the region does not exist (typically, if it has been
* destroyed)
*/
@Override
protected final void basicProcess(final DistributionManager dm) {
Throwable thr = null;
LogWriterI18n logger = null;
boolean sendReply = true;
LocalRegion r = null;
long startTime = 0;
try {
logger = dm.getLoggerI18n();
if (checkCacheClosing(dm) || checkDSClosing(dm)) {
thr = new CacheClosedException(
LocalizedStrings.PartitionMessage_REMOTE_CACHE_IS_CLOSED_0
.toLocalizedString(dm.getId()));
return;
}
GemFireCacheImpl gfc = (GemFireCacheImpl)CacheFactory.getInstance(dm.getSystem());
r = gfc.getRegionByPathForProcessing(this.regionPath);
if (r == null && failIfRegionMissing()) {
// if the distributed system is disconnecting, don't send a reply saying
// the partitioned region can't be found (bug 36585)
thr = new ForceReattemptException(LocalizedStrings
.PartitionMessage_0_COULD_NOT_FIND_PARTITIONED_REGION_WITH_ID_1
.toLocalizedString(new Object[] {
dm.getDistributionManagerId(), regionPath }));
return; // reply sent in finally block below
}
thr = UNHANDLED_EXCEPTION;
if (getTXId() == null) {
sendReply = operateOnRegion(dm, r, startTime);
}
else {
// [bruce] r might be null here, so we have to go to the cache instance
// to get the txmgr
final TXManagerImpl txMgr = GemFireCacheImpl.getInstance()
.getTxManager();
final TXManagerImpl.TXContext context = txMgr.masqueradeAs(this, false,
true);
try {
sendReply = operateOnRegion(dm, r, startTime);
} finally {
txMgr.unmasquerade(context, true);
}
}
thr = null;
} catch (RemoteOperationException fre) {
thr = fre;
}
catch (DistributedSystemDisconnectedException se) {
// bug 37026: this is too noisy...
// throw new CacheClosedException("remote system shutting down");
// thr = se; cache is closed, no point trying to send a reply
thr = null;
sendReply = false;
if (logger.fineEnabled()) {
logger.fine("shutdown caught, abandoning message: " + se);
}
}
catch (RegionDestroyedException rde) {
// if (logger.fineEnabled()) {
// logger.fine("Region is Destroyed " + rde);
// }
// [bruce] RDE does not always mean that the sender's region is also
// destroyed, so we must send back an exception. If the sender's
// region is also destroyed, who cares if we send it an exception
//if (pr != null && pr.isClosed) {
thr = new ForceReattemptException(LocalizedStrings
.PartitionMessage_REGION_IS_DESTROYED_IN_0.toLocalizedString(dm
.getDistributionManagerId()), rde);
//}
}
catch (Throwable t) {
Error err;
if (t instanceof Error && SystemFailure.isJVMFailureError(
err = (Error)t)) {
SystemFailure.initiateFailure(err);
// If this ever returns, rethrow the error. We're poisoned
// now, so don't let this thread continue.
throw err;
}
// Whenever you catch Error or Throwable, you must also
// check for fatal JVM error (see above). However, there is
// _still_ a possibility that you are dealing with a cascading
// error condition, so you also need to check to see if the JVM
// is still usable:
SystemFailure.checkFailure();
// log the exception at fine level if there is no reply to the message
thr = null;
if (sendReply) {
if (!checkDSClosing(dm)) {
thr = t;
}
else {
// don't pass arbitrary runtime exceptions and errors back if this
// cache/vm is closing
thr = new ForceReattemptException(LocalizedStrings
.PartitionMessage_DISTRIBUTED_SYSTEM_IS_DISCONNECTING
.toLocalizedString());
}
}
if (logger.fineEnabled()) {
if (DistributionManager.VERBOSE && (t instanceof RuntimeException)) {
logger.fine("Exception caught while processing message", t);
}
}
}
finally {
if (sendReply) {
ReplyException rex = null;
if (thr != null) {
// don't transmit the exception if this message was to a listener
// and this listener is shutting down
rex = new ReplyException(thr);
}
// Send the reply if the operateOnPartitionedRegion returned true
sendReply(getSender(), this.processorId, dm, rex, r, startTime);
}
}
}
/**
* Send a generic ReplyMessage. This is in a method so that subclasses can
* override the reply message type
*
* @param pr
* the Partitioned Region for the message whose statistics are
* incremented
* @param startTime
* the start time of the operation in nanoseconds
* @see PutMessage#sendReply
*/
protected void sendReply(InternalDistributedMember member, int procId, DM dm,
ReplyException ex, LocalRegion pr, long startTime) {
if (pr != null && startTime > 0) {
// pr.getPrStats().endRemoteOperationMessagesProcessing(startTime);
}
ReplyMessage.send(member, procId, ex, getReplySender(dm), this);
}
/**
* Allow classes that over-ride to choose whether a RegionDestroyException is
* thrown if no partitioned region is found (typically occurs if the message
* will be sent before the PartitionedRegion has been fully constructed.
*
* @return true if throwing a {@link RegionDestroyedException} is acceptable
*/
protected boolean failIfRegionMissing() {
return true;
}
/**
* return a new reply processor for this class, for use in relaying a
* response. This must be an instance method so subclasses can override
* it properly.
*/
RemoteOperationResponse createReplyProcessor(PartitionedRegion r,
Set recipients) {
return new RemoteOperationResponse(r.getSystem(), recipients);
}
protected abstract boolean operateOnRegion(DistributionManager dm,
LocalRegion r, long startTime) throws RemoteOperationException;
/**
* Fill out this instance of the message using the DataInput
* Required to be a {@link com.gemstone.gemfire.DataSerializable}Note: must be
* symmetric with {@link #toData(DataOutput)} in what it reads
*/
@Override
public void fromData(DataInput in) throws IOException, ClassNotFoundException
{
super.fromData(in);
this.regionPath = DataSerializer.readString(in);
}
/**
* Send the contents of this instance to the DataOutput Required to be a
* {@link com.gemstone.gemfire.DataSerializable}Note: must be symmetric with
* {@link #fromData(DataInput)}in what it writes
*/
@Override
public void toData(DataOutput out) throws IOException
{
super.toData(out);
DataSerializer.writeString(this.regionPath,out);
}
/**
* Helper class of {@link #toString()}
*
* @param buff
* buffer in which to append the state of this instance
*/
@Override
protected void appendFields(StringBuilder buff) {
// className.substring(className.lastIndexOf('.', className.lastIndexOf('.')
// - 1) + 1); // partition. more generic version
//buff.append(className.substring(className.indexOf(PN_TOKEN) +
//PN_TOKEN.length())); // partition.
buff.append("; regionPath="); // make sure this is the first one
buff.append(this.regionPath);
buff.append("; sender=").append(getSender());
buff.append("; recipients=[");
InternalDistributedMember[] recips = getRecipients();
for(int i=0; i 0) {
buff.append(recips[recips.length-1]);
}
buff.append(']');
}
public InternalDistributedMember getRecipient() {
return getRecipients()[0];
}
public void setOperation(Operation op) {
// override in subclasses holding operations
}
/**
* added to support old value to be written on wire.
* @param value true or false
* @since 6.5
*/
public void setHasOldValue(boolean value) {
// override in subclasses which need old value to be serialized.
// overridden by classes like PutMessage, DestroyMessage.
}
/**
* A processor on which to await a response from the
* {@link RemoteOperationMessage} recipient, capturing any CacheException
* thrown by the recipient and handle it as an expected exception.
*
* @author Greg Passmore
* @since 6.5
* @see #waitForCacheException()
*/
public static class RemoteOperationResponse extends DirectReplyProcessor {
/**
* The exception thrown when the recipient does not reply
*/
volatile ForceReattemptException prce;
/**
* Whether a response has been received
*/
volatile boolean responseReceived;
/**
* whether a response is required
*/
boolean responseRequired;
volatile THashMap exceptions;
public RemoteOperationResponse(InternalDistributedSystem dm,
Set initMembers) {
this(dm, initMembers, true);
}
public RemoteOperationResponse(InternalDistributedSystem dm,
Set initMembers, boolean register) {
super(dm, initMembers);
if (register) {
register();
}
}
public RemoteOperationResponse(InternalDistributedSystem dm,
InternalDistributedMember member) {
this(dm, member, true);
}
public RemoteOperationResponse(InternalDistributedSystem dm,
InternalDistributedMember member, boolean register) {
super(dm, member);
if (register) {
register();
}
}
/**
* require a response message to be received
*/
public void requireResponse() {
this.responseRequired = true;
}
@Override
public void memberDeparted(final InternalDistributedMember id,
final boolean crashed) {
if (id != null) {
if (removeMember(id, true)) {
this.prce = new ForceReattemptException(LocalizedStrings
.PartitionMessage_PARTITIONRESPONSE_GOT_MEMBERDEPARTED_EVENT_FOR_0_CRASHED_1
.toLocalizedString(new Object[] { id,
Boolean.valueOf(crashed) }));
}
checkIfDone();
}
else {
Exception e = new Exception(
LocalizedStrings.PartitionMessage_MEMBERDEPARTED_GOT_NULL_MEMBERID
.toLocalizedString());
getDistributionManager().getLoggerI18n().info(LocalizedStrings
.PartitionMessage_MEMBERDEPARTED_GOT_NULL_MEMBERID_CRASHED_0,
Boolean.valueOf(crashed), e);
}
}
/**
* Waits for the response from the {@link RemoteOperationMessage}'s
* recipient
*
* @throws CacheException
* if the recipient threw a cache exception during message
* processing
* @throws ForceReattemptException
* if the recipient left the distributed system before the
* response was received.
* @throws PrimaryBucketException
*/
final public void waitForCacheException() throws CacheException,
RemoteOperationException, PrimaryBucketException {
try {
waitForRepliesUninterruptibly();
if (this.prce != null
|| (this.responseRequired && !this.responseReceived)) {
throw new RemoteOperationException(
LocalizedStrings.PartitionMessage_ATTEMPT_FAILED
.toLocalizedString(),
this.prce);
}
} catch (ReplyException e) {
Throwable t = e.getCause();
if (t instanceof CacheException) {
throw (CacheException)t;
}
else if (t instanceof RemoteOperationException) {
RemoteOperationException ft = (RemoteOperationException)t;
// See FetchEntriesMessage, which can marshal a ForceReattempt
// across to the sender
RemoteOperationException fre = new RemoteOperationException(
LocalizedStrings.PartitionMessage_PEER_REQUESTS_REATTEMPT
.toLocalizedString(),
t);
if (ft.hasHash()) {
fre.setHash(ft.getHash());
}
throw fre;
}
else if (t instanceof PrimaryBucketException) {
// See FetchEntryMessage, GetMessage, InvalidateMessage,
// PutMessage
// which can marshal a ForceReattemptacross to the sender
throw new PrimaryBucketException(
LocalizedStrings.PartitionMessage_PEER_FAILED_PRIMARY_TEST
.toLocalizedString(),
t);
}
else if (t instanceof CancelException) {
if (getDistributionManager().getLoggerI18n().fineEnabled()) {
getDistributionManager().getLoggerI18n().fine(
"RemoteOperationResponse got CacheClosedException from "
+ e.getSender() + ", throwing ForceReattemptException", t);
}
throw new RemoteOperationException(LocalizedStrings
.PartitionMessage_PARTITIONRESPONSE_GOT_REMOTE_CACHECLOSEDEXCEPTION
.toLocalizedString(), t);
}
else if (t instanceof LowMemoryException) {
if (getDistributionManager().getLoggerI18n().fineEnabled()) {
getDistributionManager().getLoggerI18n().fine(
"RemoteOperationResponse re-throwing remote "
+ "LowMemoryException from " + e.getSender(), t);
}
throw (LowMemoryException)t;
}
e.handleAsUnexpected();
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public final Map getExceptions() {
if (this.exceptions != null) {
synchronized (this) {
return new THashMap((Map)this.exceptions);
}
}
return null;
}
@Override
protected final boolean stopBecauseOfExceptions() {
// do not stop in transactions since we have to ensure that commit or
// rollback is fired only after everything is done
return false;
}
@Override
protected final synchronized void processException(
final DistributionMessage msg, final ReplyException ex) {
if (this.exceptions == null) {
this.exceptions = new THashMap();
}
this.exceptions.put(msg.getSender(), ex);
super.processException(msg, ex);
}
/* overridden from ReplyProcessor21 */
@Override
public void process(DistributionMessage msg) {
this.responseReceived = true;
super.process(msg);
}
}
}