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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.io.IOException;
import java.nio.ByteBuffer;
import java.util.concurrent.atomic.AtomicBoolean;
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.ResultSender;
import org.apache.geode.cache.operations.ExecuteFunctionOperationContext;
import org.apache.geode.distributed.DistributedMember;
import org.apache.geode.distributed.internal.InternalDistributedSystem;
import org.apache.geode.internal.cache.tier.Command;
import org.apache.geode.internal.cache.tier.sockets.ChunkedMessage;
import org.apache.geode.internal.cache.tier.sockets.Message;
import org.apache.geode.internal.cache.tier.sockets.ServerConnection;
import org.apache.geode.internal.i18n.LocalizedStrings;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.internal.logging.log4j.LocalizedMessage;
import org.apache.geode.internal.security.AuthorizeRequestPP;
/**
*/
public class ServerToClientFunctionResultSender implements ResultSender {
private static final Logger logger = LogService.getLogger();
protected ChunkedMessage msg = null;
protected ServerConnection sc = null;
protected int messageType = -1;
protected volatile boolean headerSent = false;
protected Function fn;
protected ExecuteFunctionOperationContext authContext;
protected InternalDistributedSystem ids = InternalDistributedSystem.getAnyInstance();
protected AtomicBoolean alreadySendException = new AtomicBoolean(false);
protected boolean lastResultReceived;
protected ByteBuffer commBuffer;
protected boolean isSelector;
public boolean isLastResultReceived() {
return lastResultReceived;
}
public ServerToClientFunctionResultSender(ChunkedMessage msg, int messageType,
ServerConnection sc, Function function, ExecuteFunctionOperationContext authzContext) {
this.msg = msg;
this.msg.setVersion(sc.getClientVersion());
this.messageType = messageType;
this.sc = sc;
this.fn = function;
this.authContext = authzContext;
this.isSelector = sc.getAcceptor().isSelector();
if (this.isSelector) {
this.commBuffer = msg.getCommBuffer();
}
}
public synchronized void lastResult(Object oneResult) {
this.lastResultReceived = true;
if (!isOkayToSendResult()) {
if (logger.isDebugEnabled()) {
logger.debug(
"ServerToClientFunctionResultSender not sending lastResult {} as the server has shutdown",
oneResult);
}
return;
}
if (this.lastResultReceived) {
return;
}
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending last result1 {} " + oneResult);
}
try {
authorizeResult(oneResult);
if (!this.fn.hasResult()) {
throw new IllegalStateException(
LocalizedStrings.ExecuteFunction_CANNOT_0_RESULTS_HASRESULT_FALSE
.toLocalizedString("send"));
}
if (!headerSent) {
sendHeader();
}
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending lastResult {}", oneResult);
}
this.setBuffer();
this.msg.setNumberOfParts(1);
this.msg.addObjPart(oneResult);
this.msg.setLastChunk(true);
this.msg.sendChunk(this.sc);
this.sc.setAsTrue(Command.RESPONDED);
FunctionStats.getFunctionStats(fn.getId()).incResultsReturned();
} catch (IOException ex) {
if (isOkayToSendResult()) {
throw new FunctionException(
LocalizedStrings.ExecuteFunction_IOEXCEPTION_WHILE_SENDING_LAST_CHUNK
.toLocalizedString(),
ex);
}
}
}
public synchronized void lastResult(Object oneResult, DistributedMember memberID) {
this.lastResultReceived = true;
if (!isOkayToSendResult()) {
if (logger.isDebugEnabled()) {
logger.debug(
"ServerToClientFunctionResultSender not sending lastResult {} as the server has shutdown",
oneResult);
}
return;
}
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending last result2 {} " + oneResult);
}
try {
authorizeResult(oneResult);
if (!this.fn.hasResult()) {
throw new IllegalStateException(
LocalizedStrings.ExecuteFunction_CANNOT_0_RESULTS_HASRESULT_FALSE
.toLocalizedString("send"));
}
if (!headerSent) {
sendHeader();
}
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending lastResult {}", oneResult);
}
this.setBuffer();
this.msg.setNumberOfParts(1);
this.msg.addObjPart(oneResult);
this.msg.setLastChunk(true);
this.msg.sendChunk(this.sc);
this.sc.setAsTrue(Command.RESPONDED);
FunctionStats.getFunctionStats(fn.getId()).incResultsReturned();
} catch (IOException ex) {
if (isOkayToSendResult()) {
throw new FunctionException(
LocalizedStrings.ExecuteFunction_IOEXCEPTION_WHILE_SENDING_LAST_CHUNK
.toLocalizedString(),
ex);
}
}
}
public synchronized void sendResult(Object oneResult) {
if (!isOkayToSendResult()) {
if (logger.isDebugEnabled()) {
logger.debug(
"ServerToClientFunctionResultSender not sending result {} as the server has shutdown",
oneResult);
}
return;
}
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending result1 {} " + oneResult);
}
try {
authorizeResult(oneResult);
if (!this.fn.hasResult()) {
throw new IllegalStateException(
LocalizedStrings.ExecuteFunction_CANNOT_0_RESULTS_HASRESULT_FALSE
.toLocalizedString("send"));
}
if (!headerSent) {
sendHeader();
}
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending result {}", oneResult);
}
this.setBuffer();
this.msg.setNumberOfParts(1);
this.msg.addObjPart(oneResult);
this.msg.sendChunk(this.sc);
FunctionStats.getFunctionStats(fn.getId()).incResultsReturned();
} catch (IOException ex) {
if (isOkayToSendResult()) {
throw new FunctionException(
LocalizedStrings.ExecuteFunction_IOEXCEPTION_WHILE_SENDING_RESULT_CHUNK
.toLocalizedString(),
ex);
}
}
}
public synchronized void sendResult(Object oneResult, DistributedMember memberID) {
if (!isOkayToSendResult()) {
if (logger.isDebugEnabled()) {
logger.debug(
"ServerToClientFunctionResultSender not sending result {} as the server has shutdown",
oneResult);
}
return;
}
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending result2 {} " + oneResult);
}
try {
authorizeResult(oneResult);
if (!this.fn.hasResult()) {
throw new IllegalStateException(
LocalizedStrings.ExecuteFunction_CANNOT_0_RESULTS_HASRESULT_FALSE
.toLocalizedString("send"));
}
if (!headerSent) {
sendHeader();
}
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending result {}", oneResult);
}
this.setBuffer();
this.msg.setNumberOfParts(1);
this.msg.addObjPart(oneResult);
this.msg.sendChunk(this.sc);
FunctionStats.getFunctionStats(fn.getId()).incResultsReturned();
} catch (IOException ex) {
if (isOkayToSendResult()) {
throw new FunctionException(
LocalizedStrings.ExecuteFunction_IOEXCEPTION_WHILE_SENDING_RESULT_CHUNK
.toLocalizedString(),
ex);
}
}
}
protected void authorizeResult(Object oneResult) throws IOException {
// check if the caller is authorised to receive these function execution
// results from server
AuthorizeRequestPP authzRequestPP = this.sc.getPostAuthzRequest();
if (authzRequestPP != null) {
this.authContext.setIsPostOperation(true);
this.authContext = authzRequestPP.executeFunctionAuthorize(oneResult, this.authContext);
}
}
protected void writeFunctionExceptionResponse(ChunkedMessage message, String errormessage,
Throwable e) throws IOException {
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending Function Error Response: {}",
errormessage);
}
message.clear();
message.setLastChunk(true);
message.addObjPart(e);
message.sendChunk(this.sc);
this.sc.setAsTrue(Command.RESPONDED);
}
protected void sendHeader() throws IOException {
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending header");
}
this.setBuffer();
this.msg.setMessageType(messageType);
this.msg.setLastChunk(false);
this.msg.setNumberOfParts(1);
this.msg.sendHeader();
this.headerSent = true;
}
public void sendException(Throwable exception) {
InternalFunctionException iFunxtionException = new InternalFunctionException(exception);
this.lastResult(iFunxtionException);
this.lastResultReceived = true;
}
public synchronized void setException(Throwable exception) {
this.lastResultReceived = true;
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender setting exception {} ", exception);
}
synchronized (this.msg) {
if (!this.sc.getTransientFlag(Command.RESPONDED)) {
alreadySendException.set(true);
try {
if (!headerSent) {
sendHeader();
}
String exceptionMessage = exception.getMessage() != null ? exception.getMessage()
: "Exception occured during function execution";
logger.warn(LocalizedMessage.create(
LocalizedStrings.ExecuteRegionFunction_EXCEPTION_ON_SERVER_WHILE_EXECUTIONG_FUNCTION_0,
this.fn), exception);
if (logger.isDebugEnabled()) {
logger.debug("ServerToClientFunctionResultSender sending Function Exception : ");
}
writeFunctionExceptionResponse(msg, exceptionMessage, exception);
} catch (IOException ignoreAsSocketIsClosed) {
}
}
}
}
protected boolean isOkayToSendResult() {
return (sc.getAcceptor().isRunning() && !ids.isDisconnecting()
&& !sc.getCachedRegionHelper().getCache().isClosed() && !alreadySendException.get());
}
protected void setBuffer() {
if (this.isSelector) {
Message.setTLCommBuffer(this.commBuffer);
}
}
}