| /* |
| * 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.Collection; |
| import java.util.Set; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.CancelException; |
| import org.apache.geode.DataSerializer; |
| 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.HighPriorityDistributionMessage; |
| import org.apache.geode.distributed.internal.MessageWithReply; |
| import org.apache.geode.distributed.internal.ReplyMessage; |
| import org.apache.geode.distributed.internal.ReplyProcessor21; |
| import org.apache.geode.internal.InternalDataSerializer; |
| import org.apache.geode.internal.cache.versions.VersionTag; |
| import org.apache.geode.internal.serialization.DeserializationContext; |
| import org.apache.geode.internal.serialization.SerializationContext; |
| import org.apache.geode.logging.internal.log4j.api.LogService; |
| |
| public class FindVersionTagOperation { |
| private static final Logger logger = LogService.getLogger(); |
| |
| public static VersionTag findVersionTag(InternalRegion r, EventID eventId, boolean isBulkOp) { |
| DistributionManager dm = r.getDistributionManager(); |
| Set recipients; |
| if (r instanceof DistributedRegion) { |
| recipients = ((DistributedRegion) r).getDistributionAdvisor().adviseCacheOp(); |
| } else { |
| recipients = ((PartitionedRegion) r).getRegionAdvisor().adviseDataStore(); |
| } |
| ResultReplyProcessor processor = new ResultReplyProcessor(dm, recipients); |
| FindVersionTagMessage msg = new FindVersionTagMessage(recipients, processor.getProcessorId(), |
| r.getFullPath(), eventId, isBulkOp); |
| dm.putOutgoing(msg); |
| try { |
| processor.waitForReplies(); |
| } catch (InterruptedException e) { |
| dm.getCancelCriterion().checkCancelInProgress(e); |
| Thread.currentThread().interrupt(); |
| return null; |
| } |
| return processor.getVersionTag(); |
| } |
| |
| public static class ResultReplyProcessor extends ReplyProcessor21 { |
| |
| VersionTag versionTag; |
| |
| public ResultReplyProcessor(DistributionManager dm, Collection initMembers) { |
| super(dm, initMembers); |
| } |
| |
| @Override |
| public void process(DistributionMessage msg) { |
| if (msg instanceof VersionTagReply) { |
| VersionTagReply reply = (VersionTagReply) msg; |
| if (reply.versionTag != null) { |
| this.versionTag = reply.versionTag; |
| this.versionTag.replaceNullIDs(reply.getSender()); |
| } |
| } |
| super.process(msg); |
| } |
| |
| public VersionTag getVersionTag() { |
| return versionTag; |
| } |
| |
| @Override |
| public boolean stillWaiting() { |
| return this.versionTag == null && super.stillWaiting(); |
| } |
| } |
| |
| /** |
| * FindVersionTagOperation searches other members for version information for a replayed |
| * operation. If we don't have version information the op may be applied by this cache as a new |
| * event. When the event is then propagated to other servers that have already seen the event it |
| * will be ignored, causing an inconsistency. |
| */ |
| public static class FindVersionTagMessage extends HighPriorityDistributionMessage |
| implements MessageWithReply { |
| |
| int processorId; |
| String regionName; |
| EventID eventId; |
| private boolean isBulkOp; |
| |
| protected FindVersionTagMessage(Collection recipients, int processorId, String regionName, |
| EventID eventId, boolean isBulkOp) { |
| super(); |
| setRecipients(recipients); |
| this.processorId = processorId; |
| this.regionName = regionName; |
| this.eventId = eventId; |
| this.isBulkOp = isBulkOp; |
| } |
| |
| /** for deserialization */ |
| public FindVersionTagMessage() {} |
| |
| @Override |
| protected void process(ClusterDistributionManager dm) { |
| VersionTag result = null; |
| try { |
| LocalRegion r = (LocalRegion) findRegion(dm); |
| if (r == null) { |
| if (logger.isDebugEnabled()) { |
| logger.debug("Region not found, so ignoring version tag request: {}", this); |
| } |
| return; |
| } |
| if (isBulkOp) { |
| result = r.findVersionTagForClientBulkOp(eventId); |
| |
| } else { |
| result = r.findVersionTagForEvent(eventId); |
| } |
| if (result != null) { |
| result.replaceNullIDs(r.getVersionMember()); |
| } |
| if (logger.isDebugEnabled()) { |
| logger.debug("Found version tag {}", result); |
| } |
| |
| } catch (RuntimeException e) { |
| logger.warn("Exception thrown while searching for a version tag", e); |
| } finally { |
| VersionTagReply reply = new VersionTagReply(result); |
| reply.setProcessorId(this.processorId); |
| reply.setRecipient(getSender()); |
| try { |
| dm.putOutgoing(reply); |
| } catch (CancelException e) { |
| // can't send a reply, so ignore the exception |
| } |
| } |
| } |
| |
| private InternalRegion findRegion(ClusterDistributionManager dm) { |
| try { |
| InternalCache cache = dm.getCache(); |
| if (cache != null) { |
| return cache.getRegionByPathForProcessing(regionName); |
| } |
| } catch (CancelException e) { |
| // nothing to do |
| } |
| return null; |
| } |
| |
| @Override |
| public int getDSFID() { |
| return FIND_VERSION_TAG; |
| } |
| |
| @Override |
| public void toData(DataOutput out, |
| SerializationContext context) throws IOException { |
| super.toData(out, context); |
| out.writeInt(this.processorId); |
| out.writeUTF(this.regionName); |
| InternalDataSerializer.invokeToData(this.eventId, out); |
| out.writeBoolean(this.isBulkOp); |
| } |
| |
| @Override |
| public void fromData(DataInput in, |
| DeserializationContext context) throws IOException, ClassNotFoundException { |
| super.fromData(in, context); |
| this.processorId = in.readInt(); |
| this.regionName = in.readUTF(); |
| this.eventId = new EventID(); |
| InternalDataSerializer.invokeFromData(this.eventId, in); |
| this.isBulkOp = in.readBoolean(); |
| } |
| |
| @Override |
| public String toString() { |
| return this.getShortClassName() + "(processorId=" + this.processorId + ";region=" |
| + this.regionName + ";eventId=" + this.eventId + ";isBulkOp=" + this.isBulkOp + ")"; |
| } |
| } |
| |
| public static class VersionTagReply extends ReplyMessage { |
| VersionTag versionTag; |
| |
| VersionTagReply(VersionTag result) { |
| this.versionTag = result; |
| } |
| |
| /** for deserialization */ |
| public VersionTagReply() {} |
| |
| @Override |
| public String toString() { |
| return "VersionTagReply(" + this.versionTag + ")"; |
| } |
| |
| @Override |
| public void toData(DataOutput out, |
| SerializationContext context) throws IOException { |
| super.toData(out, context); |
| DataSerializer.writeObject(this.versionTag, out); |
| } |
| |
| @Override |
| public void fromData(DataInput in, |
| DeserializationContext context) throws IOException, ClassNotFoundException { |
| super.fromData(in, context); |
| this.versionTag = (VersionTag) DataSerializer.readObject(in); |
| } |
| |
| @Override |
| public int getDSFID() { |
| return VERSION_TAG_REPLY; |
| } |
| } |
| |
| } |