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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
/*
* 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.execute;
import java.util.Set;
import org.apache.logging.log4j.Logger;
import org.apache.geode.cache.execute.Function;
import org.apache.geode.cache.execute.FunctionException;
import org.apache.geode.cache.execute.ResultCollector;
import org.apache.geode.distributed.DistributedMember;
import org.apache.geode.distributed.internal.DM;
import org.apache.geode.internal.cache.ForceReattemptException;
import org.apache.geode.internal.cache.PartitionedRegion;
import org.apache.geode.internal.cache.partitioned.PartitionedRegionFunctionStreamingMessage;
import org.apache.geode.internal.i18n.LocalizedStrings;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.internal.logging.log4j.LocalizedMessage;
/**
* ResultSender needs ResultCollector in which to add results one by one. In case of localExecution
* it just adds result to the resultCollector whereas for remote cases it takes help of
* PRFunctionExecutionStreamer to send results to the calling node. The results will be received in
* the ResultReciever. ResultSender will be instantiated in executeOnDatastore and set in
* FunctionContext.
*
*/
public final class PartitionedRegionFunctionResultSender implements InternalResultSender {
private static final Logger logger = LogService.getLogger();
PartitionedRegionFunctionStreamingMessage msg = null;
private final DM dm;
private final PartitionedRegion pr;
private final long time;
private final boolean forwardExceptions;
private ResultCollector rc;
private ServerToClientFunctionResultSender serverSender;
private boolean localLastResultRecieved = false;
private boolean onlyLocal = false;
private boolean onlyRemote = false;
private boolean completelyDoneFromRemote = false;
private final Function function;
private boolean enableOrderedResultStreming;
private Set bucketSet;
private BucketMovedException bme;
/**
* Have to combine next two constructor in one and make a new class which will send Results back.
*
* @param msg
* @param dm
* @param pr
* @param time
*/
public PartitionedRegionFunctionResultSender(DM dm, PartitionedRegion pr, long time,
PartitionedRegionFunctionStreamingMessage msg, Function function, Set bucketSet) {
this.msg = msg;
this.dm = dm;
this.pr = pr;
this.time = time;
this.function = function;
this.bucketSet = bucketSet;
forwardExceptions = false;
}
/**
* Have to combine next two constructor in one and make a new class which will send Results back.
*
* @param dm
* @param partitionedRegion
* @param time
* @param rc
*/
public PartitionedRegionFunctionResultSender(DM dm, PartitionedRegion partitionedRegion,
long time, ResultCollector rc, ServerToClientFunctionResultSender sender, boolean onlyLocal,
boolean onlyRemote, boolean forwardExceptions, Function function, Set bucketSet) {
this.dm = dm;
this.pr = partitionedRegion;
this.time = time;
this.rc = rc;
this.serverSender = sender;
this.onlyLocal = onlyLocal;
this.onlyRemote = onlyRemote;
this.forwardExceptions = forwardExceptions;
this.function = function;
this.bucketSet = bucketSet;
}
private void checkForBucketMovement(Object oneResult) {
if (!(forwardExceptions && oneResult instanceof Throwable)
&& !pr.getDataStore().areAllBucketsHosted(bucketSet)) {
// making sure that we send all the local results first
// before sending this exception to client
bme = new BucketMovedException(
LocalizedStrings.FunctionService_BUCKET_MIGRATED_TO_ANOTHER_NODE.toLocalizedString());
if (function.isHA()) {
throw bme;
}
}
}
// this must be getting called directly from function
public void lastResult(Object oneResult) {
if (!this.function.hasResult()) {
throw new IllegalStateException(
LocalizedStrings.ExecuteFunction_CANNOT_0_RESULTS_HASRESULT_FALSE
.toLocalizedString("send"));
}
// this could be done before doing end result
// so that client receives all the results before
if (this.serverSender != null) { // Client-Server
if (this.localLastResultRecieved) {
return;
}
if (onlyLocal) {
checkForBucketMovement(oneResult);
if (bme != null) {
clientSend(oneResult, dm.getDistributionManagerId());
lastClientSend(dm.getDistributionManagerId(), bme);
} else {
lastClientSend(dm.getDistributionManagerId(), oneResult);
}
this.rc.endResults();
this.localLastResultRecieved = true;
} else {
// call a synchronized method as local node is also waiting to send lastResult
lastResult(oneResult, rc, false, true, dm.getDistributionManagerId());
}
} else { // P2P
if (this.msg != null) {
checkForBucketMovement(oneResult);
try {
if (this.bme != null) {
this.msg.sendReplyForOneResult(dm, pr, time, oneResult, false,
enableOrderedResultStreming);
throw bme;
} else {
this.msg.sendReplyForOneResult(dm, pr, time, oneResult, true,
enableOrderedResultStreming);
}
} catch (ForceReattemptException e) {
throw new FunctionException(e);
} catch (InterruptedException e) {
throw new FunctionException(e);
}
} else {
if (this.localLastResultRecieved) {
return;
}
if (onlyLocal) {
checkForBucketMovement(oneResult);
if (bme != null) {
this.rc.addResult(dm.getDistributionManagerId(), oneResult);
this.rc.addResult(dm.getDistributionManagerId(), bme);
} else {
this.rc.addResult(dm.getDistributionManagerId(), oneResult);
}
// exception thrown will do end result
this.rc.endResults();
this.localLastResultRecieved = true;
} else {
// call a synchronized method as local node is also waiting to send lastResult
lastResult(oneResult, rc, false, true, dm.getDistributionManagerId());
}
FunctionStats.getFunctionStats(function.getId(), this.dm.getSystem()).incResultsReceived();
}
// incrementing result sent stats.
// Bug : remote node as well as local node calls this method to send
// the result When the remote nodes are added to the local result collector at that
// time the stats for the result sent is again incremented : Once the PR team comes with the
// concept of the Streaming FunctionOperation
// for the partitioned Region then it will be simple to fix this problem.
FunctionStats.getFunctionStats(function.getId(), this.dm.getSystem()).incResultsReturned();
}
}
private synchronized void lastResult(Object oneResult, ResultCollector collector,
boolean lastRemoteResult, boolean lastLocalResult, DistributedMember memberID) {
if (lastRemoteResult) {
this.completelyDoneFromRemote = true;
}
if (lastLocalResult) {
this.localLastResultRecieved = true;
}
if (this.serverSender != null) { // Client-Server
if (this.completelyDoneFromRemote && this.localLastResultRecieved) {
if (lastLocalResult) {
checkForBucketMovement(oneResult);
if (bme != null) {
clientSend(oneResult, dm.getDistributionManagerId());
lastClientSend(dm.getDistributionManagerId(), bme);
} else {
lastClientSend(memberID, oneResult);
}
} else {
lastClientSend(memberID, oneResult);
}
collector.endResults();
} else {
if (lastLocalResult) {
checkForBucketMovement(oneResult);
if (bme != null) {
clientSend(oneResult, memberID);
clientSend(bme, memberID);
} else {
clientSend(oneResult, memberID);
}
} else {
clientSend(oneResult, memberID);
}
}
} else { // P2P
if (this.completelyDoneFromRemote && this.localLastResultRecieved) {
if (lastLocalResult) {
checkForBucketMovement(oneResult);
if (bme != null) {
collector.addResult(memberID, oneResult);
collector.addResult(memberID, bme);
} else {
collector.addResult(memberID, oneResult);
}
} else {
collector.addResult(memberID, oneResult);
}
collector.endResults();
} else {
if (lastLocalResult) {
checkForBucketMovement(oneResult);
if (bme != null) {
collector.addResult(memberID, oneResult);
collector.addResult(memberID, bme);
} else {
collector.addResult(memberID, oneResult);
}
} else {
collector.addResult(memberID, oneResult);
}
}
}
}
public synchronized void lastResult(Object oneResult, boolean completelyDoneFromRemote,
ResultCollector reply, DistributedMember memberID) {
logger.debug("PartitionedRegionFunctionResultSender Sending lastResult {}", oneResult);
if (this.serverSender != null) { // Client-Server
if (completelyDoneFromRemote) {
if (this.onlyRemote) {
lastClientSend(memberID, oneResult);
reply.endResults();
} else {
// call a synchronized method as local node is also waiting to send lastResult
lastResult(oneResult, reply, true, false, memberID);
}
} else {
clientSend(oneResult, memberID);
}
} else {
if (completelyDoneFromRemote) {
if (this.onlyRemote) {
reply.addResult(memberID, oneResult);
reply.endResults();
} else {
// call a synchronized method as local node is also waiting to send lastResult
lastResult(oneResult, reply, true, false, memberID);
}
} else {
reply.addResult(memberID, oneResult);
}
if (this.dm == null) {
FunctionStats.getFunctionStats(function.getId()).incResultsReceived();
} else {
FunctionStats.getFunctionStats(function.getId(), this.dm.getSystem()).incResultsReceived();
}
}
if (this.dm == null) {
FunctionStats.getFunctionStats(function.getId()).incResultsReturned();
} else {
FunctionStats.getFunctionStats(function.getId(), this.dm.getSystem()).incResultsReturned();
}
}
public void sendResult(Object oneResult) {
if (!this.function.hasResult()) {
throw new IllegalStateException(
LocalizedStrings.ExecuteFunction_CANNOT_0_RESULTS_HASRESULT_FALSE
.toLocalizedString("send"));
}
if (this.serverSender != null) {
logger.debug(
"PartitionedRegionFunctionResultSender sending result from local node to client {}",
oneResult);
clientSend(oneResult, dm.getDistributionManagerId());
} else { // P2P
if (this.msg != null) {
try {
logger.debug("PartitionedRegionFunctionResultSender sending result from remote node {}",
oneResult);
this.msg.sendReplyForOneResult(dm, pr, time, oneResult, false,
enableOrderedResultStreming);
} catch (ForceReattemptException e) {
throw new FunctionException(e);
} catch (InterruptedException e) {
throw new FunctionException(e);
}
} else {
logger.debug(
"PartitionedRegionFunctionResultSender adding result to ResultCollector on local node {}",
oneResult);
this.rc.addResult(dm.getDistributionManagerId(), oneResult);
FunctionStats.getFunctionStats(function.getId(), this.dm.getSystem()).incResultsReceived();
}
// incrementing result sent stats.
FunctionStats.getFunctionStats(function.getId(), this.dm.getSystem()).incResultsReturned();
}
}
private void clientSend(Object oneResult, DistributedMember memberID) {
this.serverSender.sendResult(oneResult, memberID);
}
private void lastClientSend(DistributedMember memberID, Object lastResult) {
this.serverSender.lastResult(lastResult, memberID);
}
public void sendException(Throwable exception) {
InternalFunctionException iFunxtionException = new InternalFunctionException(exception);
this.lastResult(iFunxtionException);
this.localLastResultRecieved = true;
}
public void setException(Throwable exception) {
if (this.serverSender != null) {
this.serverSender.setException(exception);
} else {
((LocalResultCollector) this.rc).setException(exception);
logger.info(
LocalizedMessage.create(
LocalizedStrings.PartitionedRegionFunctionResultSender_UNEXPECTED_EXCEPTION_DURING_FUNCTION_EXECUTION_ON_LOCAL_NODE),
exception);
}
this.rc.endResults();
this.localLastResultRecieved = true;
}
public void enableOrderedResultStreming(boolean enable) {
this.enableOrderedResultStreming = enable;
}
public boolean isLocallyExecuted() {
return this.msg == null;
}
public boolean isLastResultReceived() {
return localLastResultRecieved;
}
}