| /* |
| * 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.tx; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.Set; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.DataSerializable; |
| import org.apache.geode.DataSerializer; |
| import org.apache.geode.cache.CacheException; |
| import org.apache.geode.cache.EntryNotFoundException; |
| import org.apache.geode.cache.Region; |
| import org.apache.geode.cache.TransactionException; |
| import org.apache.geode.distributed.internal.ClusterDistributionManager; |
| 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.cache.EntrySnapshot; |
| import org.apache.geode.internal.cache.KeyInfo; |
| import org.apache.geode.internal.cache.LocalRegion; |
| import org.apache.geode.internal.cache.NonLocalRegionEntry; |
| import org.apache.geode.internal.cache.RemoteOperationException; |
| import org.apache.geode.internal.logging.log4j.LogMarker; |
| import org.apache.geode.internal.serialization.DeserializationContext; |
| import org.apache.geode.internal.serialization.SerializationContext; |
| import org.apache.geode.logging.internal.log4j.api.LogService; |
| |
| /** |
| * 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.tx.RemoteFetchEntryMessage.FetchEntryReplyMessage}. |
| * |
| * @since GemFire 5.1 |
| */ |
| public 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 fetched |
| * @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(), 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( |
| String.format("Failed sending < %s >", m)); |
| } |
| |
| return p; |
| } |
| |
| @Override |
| protected boolean operateOnRegion(ClusterDistributionManager dm, LocalRegion r, long startTime) |
| throws RemoteOperationException { |
| 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); |
| 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( |
| "entry not found", enfe)); |
| } |
| |
| // 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); |
| } |
| |
| @Override |
| public int getDSFID() { |
| return R_FETCH_ENTRY_MESSAGE; |
| } |
| |
| @Override |
| public void fromData(DataInput in, |
| DeserializationContext context) throws IOException, ClassNotFoundException { |
| super.fromData(in, context); |
| this.key = DataSerializer.readObject(in); |
| } |
| |
| @Override |
| public void toData(DataOutput out, |
| SerializationContext context) throws IOException { |
| super.toData(out, context); |
| 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 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, DistributionManager 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 DistributionManager dm, final ReplyProcessor21 processor) { |
| final boolean isDebugEnabled = logger.isTraceEnabled(LogMarker.DM_VERBOSE); |
| |
| final long startTime = getTimestamp(); |
| if (isDebugEnabled) { |
| logger.trace(LogMarker.DM_VERBOSE, |
| "FetchEntryReplyMessage process invoking reply processor with processorId:{}", |
| this.processorId); |
| } |
| |
| if (processor == null) { |
| if (isDebugEnabled) { |
| logger.trace(LogMarker.DM_VERBOSE, "FetchEntryReplyMessage processor not found"); |
| } |
| return; |
| } |
| processor.process(this); |
| |
| if (isDebugEnabled) { |
| logger.trace(LogMarker.DM_VERBOSE, "{} processed {}", processor, this); |
| } |
| dm.getStats().incReplyMessageTime(NanoTimer.getTime() - startTime); |
| } |
| |
| public EntrySnapshot getValue() { |
| return this.value; |
| } |
| |
| @Override |
| public void toData(DataOutput out, |
| SerializationContext context) throws IOException { |
| super.toData(out, context); |
| 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, |
| DeserializationContext context) throws IOException, ClassNotFoundException { |
| super.fromData(in, context); |
| boolean nullEntry = in.readBoolean(); |
| if (!nullEntry) { |
| // EntrySnapshot.setRegion is called later |
| this.value = new EntrySnapshot(in, null); |
| } |
| } |
| |
| @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.tx.RemoteFetchEntryMessage.FetchEntryReplyMessage} |
| * |
| */ |
| public static class FetchEntryResponse extends RemoteOperationResponse { |
| private volatile EntrySnapshot returnValue; |
| |
| final LocalRegion region; |
| final Object key; |
| |
| public FetchEntryResponse(InternalDistributedSystem ds, InternalDistributedMember recipient, |
| LocalRegion theRegion, Object key) { |
| super(ds, recipient); |
| 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 (this.returnValue != null) { |
| this.returnValue.setRegion(this.region); |
| } |
| if (logger.isTraceEnabled(LogMarker.DM_VERBOSE)) { |
| logger.trace(LogMarker.DM_VERBOSE, "FetchEntryResponse return value is {}", |
| this.returnValue); |
| } |
| } |
| } finally { |
| super.process(msg); |
| } |
| } |
| |
| /** |
| * @return Object associated with the key that was sent in the get message |
| * @throws RemoteOperationException if the peer is no longer available |
| */ |
| public EntrySnapshot waitForResponse() throws EntryNotFoundException, RemoteOperationException { |
| try { |
| waitForRemoteResponse(); |
| } catch (EntryNotFoundException | TransactionException e) { |
| throw e; |
| } catch (CacheException ce) { |
| logger.debug("FetchEntryResponse failed with remote CacheException", ce); |
| throw new RemoteOperationException("FetchEntryResponse failed with remote CacheException", |
| ce); |
| } |
| return this.returnValue; |
| } |
| } |
| |
| } |