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The Java operations layer for the MongoDB Java Driver. Third parties can ' +
'wrap this layer to provide custom higher-level APIs
/*
* Copyright 2008-present MongoDB, Inc.
*
* 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.
*/
package com.mongodb.internal.connection;
import com.mongodb.LoggerSettings;
import com.mongodb.MongoClientException;
import com.mongodb.MongoCompressor;
import com.mongodb.MongoException;
import com.mongodb.MongoInternalException;
import com.mongodb.MongoInterruptedException;
import com.mongodb.MongoSocketClosedException;
import com.mongodb.MongoSocketReadException;
import com.mongodb.MongoSocketReadTimeoutException;
import com.mongodb.MongoSocketWriteException;
import com.mongodb.RequestContext;
import com.mongodb.ServerAddress;
import com.mongodb.annotations.NotThreadSafe;
import com.mongodb.connection.AsyncCompletionHandler;
import com.mongodb.connection.ClusterConnectionMode;
import com.mongodb.connection.ClusterId;
import com.mongodb.connection.ConnectionDescription;
import com.mongodb.connection.ConnectionId;
import com.mongodb.connection.ServerConnectionState;
import com.mongodb.connection.ServerDescription;
import com.mongodb.connection.ServerId;
import com.mongodb.connection.ServerType;
import com.mongodb.connection.Stream;
import com.mongodb.connection.StreamFactory;
import com.mongodb.event.CommandListener;
import com.mongodb.internal.VisibleForTesting;
import com.mongodb.internal.async.SingleResultCallback;
import com.mongodb.internal.diagnostics.logging.Logger;
import com.mongodb.internal.diagnostics.logging.Loggers;
import com.mongodb.internal.logging.StructuredLogger;
import com.mongodb.internal.session.SessionContext;
import com.mongodb.lang.Nullable;
import org.bson.BsonBinaryReader;
import org.bson.BsonDocument;
import org.bson.ByteBuf;
import org.bson.codecs.BsonDocumentCodec;
import org.bson.codecs.Decoder;
import org.bson.io.ByteBufferBsonInput;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.SocketTimeoutException;
import java.nio.channels.ClosedByInterruptException;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
import static com.mongodb.assertions.Assertions.assertNotNull;
import static com.mongodb.assertions.Assertions.isTrue;
import static com.mongodb.assertions.Assertions.notNull;
import static com.mongodb.internal.async.ErrorHandlingResultCallback.errorHandlingCallback;
import static com.mongodb.internal.connection.CommandHelper.HELLO;
import static com.mongodb.internal.connection.CommandHelper.LEGACY_HELLO;
import static com.mongodb.internal.connection.CommandHelper.LEGACY_HELLO_LOWER;
import static com.mongodb.internal.connection.MessageHeader.MESSAGE_HEADER_LENGTH;
import static com.mongodb.internal.connection.OpCode.OP_COMPRESSED;
import static com.mongodb.internal.connection.ProtocolHelper.createSpecialWriteConcernException;
import static com.mongodb.internal.connection.ProtocolHelper.getClusterTime;
import static com.mongodb.internal.connection.ProtocolHelper.getCommandFailureException;
import static com.mongodb.internal.connection.ProtocolHelper.getMessageSettings;
import static com.mongodb.internal.connection.ProtocolHelper.getOperationTime;
import static com.mongodb.internal.connection.ProtocolHelper.getRecoveryToken;
import static com.mongodb.internal.connection.ProtocolHelper.getSnapshotTimestamp;
import static com.mongodb.internal.connection.ProtocolHelper.isCommandOk;
import static com.mongodb.internal.logging.StructuredLogMessage.Level.DEBUG;
import static java.lang.String.format;
import static java.util.Arrays.asList;
/**
* This class is not part of the public API and may be removed or changed at any time
*/
@NotThreadSafe
public class InternalStreamConnection implements InternalConnection {
private static final Set SECURITY_SENSITIVE_COMMANDS = new HashSet<>(asList(
"authenticate",
"saslStart",
"saslContinue",
"getnonce",
"createUser",
"updateUser",
"copydbgetnonce",
"copydbsaslstart",
"copydb"));
private static final Set SECURITY_SENSITIVE_HELLO_COMMANDS = new HashSet<>(asList(
HELLO,
LEGACY_HELLO,
LEGACY_HELLO_LOWER));
private static final Logger LOGGER = Loggers.getLogger("connection");
private final ClusterConnectionMode clusterConnectionMode;
private final boolean isMonitoringConnection;
private final ServerId serverId;
private final ConnectionGenerationSupplier connectionGenerationSupplier;
private final StreamFactory streamFactory;
private final InternalConnectionInitializer connectionInitializer;
private volatile ConnectionDescription description;
private volatile ServerDescription initialServerDescription;
private volatile Stream stream;
private final AtomicBoolean isClosed = new AtomicBoolean();
private final AtomicBoolean opened = new AtomicBoolean();
private final List compressorList;
private final LoggerSettings loggerSettings;
private final CommandListener commandListener;
@Nullable private volatile Compressor sendCompressor;
private final Map compressorMap;
private volatile boolean hasMoreToCome;
private volatile int responseTo;
private int generation = NOT_INITIALIZED_GENERATION;
// Package-level access provided to avoid duplicating the list in test code
static Set getSecuritySensitiveCommands() {
return Collections.unmodifiableSet(SECURITY_SENSITIVE_COMMANDS);
}
// Package-level access provided to avoid duplicating the list in test code
static Set getSecuritySensitiveHelloCommands() {
return Collections.unmodifiableSet(SECURITY_SENSITIVE_HELLO_COMMANDS);
}
@VisibleForTesting(otherwise = VisibleForTesting.AccessModifier.PRIVATE)
public InternalStreamConnection(final ClusterConnectionMode clusterConnectionMode, final ServerId serverId,
final ConnectionGenerationSupplier connectionGenerationSupplier,
final StreamFactory streamFactory, final List compressorList,
final CommandListener commandListener, final InternalConnectionInitializer connectionInitializer) {
this(clusterConnectionMode, false, serverId, connectionGenerationSupplier, streamFactory, compressorList,
LoggerSettings.builder().build(), commandListener, connectionInitializer);
}
public InternalStreamConnection(final ClusterConnectionMode clusterConnectionMode, final boolean isMonitoringConnection,
final ServerId serverId,
final ConnectionGenerationSupplier connectionGenerationSupplier,
final StreamFactory streamFactory, final List compressorList,
final LoggerSettings loggerSettings,
final CommandListener commandListener, final InternalConnectionInitializer connectionInitializer) {
this.clusterConnectionMode = clusterConnectionMode;
this.isMonitoringConnection = isMonitoringConnection;
this.serverId = notNull("serverId", serverId);
this.connectionGenerationSupplier = notNull("connectionGeneration", connectionGenerationSupplier);
this.streamFactory = notNull("streamFactory", streamFactory);
this.compressorList = notNull("compressorList", compressorList);
this.compressorMap = createCompressorMap(compressorList);
this.loggerSettings = loggerSettings;
this.commandListener = commandListener;
this.connectionInitializer = notNull("connectionInitializer", connectionInitializer);
description = new ConnectionDescription(serverId);
initialServerDescription = ServerDescription.builder()
.address(serverId.getAddress())
.type(ServerType.UNKNOWN)
.state(ServerConnectionState.CONNECTING)
.build();
if (clusterConnectionMode != ClusterConnectionMode.LOAD_BALANCED) {
generation = connectionGenerationSupplier.getGeneration();
}
}
@Override
public ConnectionDescription getDescription() {
return description;
}
@Override
public ServerDescription getInitialServerDescription() {
return initialServerDescription;
}
@Override
public int getGeneration() {
return generation;
}
@Override
public void open() {
isTrue("Open already called", stream == null);
stream = streamFactory.create(serverId.getAddress());
try {
stream.open();
InternalConnectionInitializationDescription initializationDescription = connectionInitializer.startHandshake(this);
initAfterHandshakeStart(initializationDescription);
initializationDescription = connectionInitializer.finishHandshake(this, initializationDescription);
initAfterHandshakeFinish(initializationDescription);
} catch (Throwable t) {
close();
if (t instanceof MongoException) {
throw (MongoException) t;
} else {
throw new MongoException(t.toString(), t);
}
}
}
@Override
public void openAsync(final SingleResultCallback callback) {
isTrue("Open already called", stream == null, callback);
try {
stream = streamFactory.create(serverId.getAddress());
stream.openAsync(new AsyncCompletionHandler() {
@Override
public void completed(@Nullable final Void aVoid) {
connectionInitializer.startHandshakeAsync(InternalStreamConnection.this,
(initialResult, initialException) -> {
if (initialException != null) {
close();
callback.onResult(null, initialException);
} else {
assertNotNull(initialResult);
initAfterHandshakeStart(initialResult);
connectionInitializer.finishHandshakeAsync(InternalStreamConnection.this,
initialResult, (completedResult, completedException) -> {
if (completedException != null) {
close();
callback.onResult(null, completedException);
} else {
assertNotNull(completedResult);
initAfterHandshakeFinish(completedResult);
callback.onResult(null, null);
}
});
}
});
}
@Override
public void failed(final Throwable t) {
close();
callback.onResult(null, t);
}
});
} catch (Throwable t) {
close();
callback.onResult(null, t);
}
}
private void initAfterHandshakeStart(final InternalConnectionInitializationDescription initializationDescription) {
description = initializationDescription.getConnectionDescription();
initialServerDescription = initializationDescription.getServerDescription();
if (clusterConnectionMode == ClusterConnectionMode.LOAD_BALANCED) {
generation = connectionGenerationSupplier.getGeneration(assertNotNull(description.getServiceId()));
}
}
private void initAfterHandshakeFinish(final InternalConnectionInitializationDescription initializationDescription) {
description = initializationDescription.getConnectionDescription();
initialServerDescription = initializationDescription.getServerDescription();
opened.set(true);
sendCompressor = findSendCompressor(description);
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(format("Opened connection [%s] to %s", getId(), serverId.getAddress()));
}
}
private Map createCompressorMap(final List compressorList) {
Map compressorMap = new HashMap<>(this.compressorList.size());
for (MongoCompressor mongoCompressor : compressorList) {
Compressor compressor = createCompressor(mongoCompressor);
compressorMap.put(compressor.getId(), compressor);
}
return compressorMap;
}
@Nullable
private Compressor findSendCompressor(final ConnectionDescription description) {
if (description.getCompressors().isEmpty()) {
return null;
}
String firstCompressorName = description.getCompressors().get(0);
for (Compressor compressor : compressorMap.values()) {
if (compressor.getName().equals(firstCompressorName)) {
return compressor;
}
}
throw new MongoInternalException("Unexpected compressor negotiated: " + firstCompressorName);
}
private Compressor createCompressor(final MongoCompressor mongoCompressor) {
if (mongoCompressor.getName().equals("zlib")) {
return new ZlibCompressor(mongoCompressor);
} else if (mongoCompressor.getName().equals("snappy")) {
return new SnappyCompressor();
} else if (mongoCompressor.getName().equals("zstd")) {
return new ZstdCompressor();
} else {
throw new MongoClientException("Unsupported compressor " + mongoCompressor.getName());
}
}
@Override
public void close() {
// All but the first call is a no-op
if (!isClosed.getAndSet(true)) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(format("Closing connection %s", getId()));
}
if (stream != null) {
stream.close();
}
}
}
@Override
public boolean opened() {
return opened.get();
}
@Override
public boolean isClosed() {
return isClosed.get();
}
@Nullable
@Override
public T sendAndReceive(final CommandMessage message, final Decoder decoder, final SessionContext sessionContext,
final RequestContext requestContext) {
CommandEventSender commandEventSender;
try (ByteBufferBsonOutput bsonOutput = new ByteBufferBsonOutput(this)) {
message.encode(bsonOutput, sessionContext);
commandEventSender = createCommandEventSender(message, bsonOutput, requestContext);
commandEventSender.sendStartedEvent();
try {
sendCommandMessage(message, bsonOutput, sessionContext);
} catch (Exception e) {
commandEventSender.sendFailedEvent(e);
throw e;
}
}
if (message.isResponseExpected()) {
return receiveCommandMessageResponse(decoder, commandEventSender, sessionContext, 0);
} else {
commandEventSender.sendSucceededEventForOneWayCommand();
return null;
}
}
@Override
public void send(final CommandMessage message, final Decoder decoder, final SessionContext sessionContext) {
try (ByteBufferBsonOutput bsonOutput = new ByteBufferBsonOutput(this)) {
message.encode(bsonOutput, sessionContext);
sendCommandMessage(message, bsonOutput, sessionContext);
if (message.isResponseExpected()) {
hasMoreToCome = true;
}
}
}
@Override
public T receive(final Decoder decoder, final SessionContext sessionContext) {
isTrue("Response is expected", hasMoreToCome);
return receiveCommandMessageResponse(decoder, new NoOpCommandEventSender(), sessionContext, 0);
}
@Override
public boolean supportsAdditionalTimeout() {
return stream.supportsAdditionalTimeout();
}
@Override
public T receive(final Decoder decoder, final SessionContext sessionContext, final int additionalTimeout) {
isTrue("Response is expected", hasMoreToCome);
return receiveCommandMessageResponse(decoder, new NoOpCommandEventSender(), sessionContext, additionalTimeout);
}
@Override
public boolean hasMoreToCome() {
return hasMoreToCome;
}
private void sendCommandMessage(final CommandMessage message,
final ByteBufferBsonOutput bsonOutput, final SessionContext sessionContext) {
Compressor localSendCompressor = sendCompressor;
if (localSendCompressor == null || SECURITY_SENSITIVE_COMMANDS.contains(message.getCommandDocument(bsonOutput).getFirstKey())) {
try {
sendMessage(bsonOutput.getByteBuffers(), message.getId());
} finally {
bsonOutput.close();
}
} else {
List byteBuffers = bsonOutput.getByteBuffers();
ByteBufferBsonOutput compressedBsonOutput;
try {
CompressedMessage compressedMessage = new CompressedMessage(message.getOpCode(), byteBuffers, localSendCompressor,
getMessageSettings(description));
compressedBsonOutput = new ByteBufferBsonOutput(this);
compressedMessage.encode(compressedBsonOutput, sessionContext);
} finally {
releaseAllBuffers(byteBuffers);
bsonOutput.close();
}
try {
sendMessage(compressedBsonOutput.getByteBuffers(), message.getId());
} finally {
compressedBsonOutput.close();
}
}
responseTo = message.getId();
}
private T receiveCommandMessageResponse(final Decoder decoder,
final CommandEventSender commandEventSender, final SessionContext sessionContext,
final int additionalTimeout) {
boolean commandSuccessful = false;
try (ResponseBuffers responseBuffers = receiveMessageWithAdditionalTimeout(additionalTimeout)) {
updateSessionContext(sessionContext, responseBuffers);
if (!isCommandOk(responseBuffers)) {
throw getCommandFailureException(responseBuffers.getResponseDocument(responseTo,
new BsonDocumentCodec()), description.getServerAddress());
}
commandSuccessful = true;
commandEventSender.sendSucceededEvent(responseBuffers);
T commandResult = getCommandResult(decoder, responseBuffers, responseTo);
hasMoreToCome = responseBuffers.getReplyHeader().hasMoreToCome();
if (hasMoreToCome) {
responseTo = responseBuffers.getReplyHeader().getRequestId();
} else {
responseTo = 0;
}
return commandResult;
} catch (Exception e) {
if (!commandSuccessful) {
commandEventSender.sendFailedEvent(e);
}
throw e;
}
}
@Override
public void sendAndReceiveAsync(final CommandMessage message, final Decoder decoder, final SessionContext sessionContext,
final RequestContext requestContext, final SingleResultCallback callback) {
notNull("stream is open", stream, callback);
if (isClosed()) {
callback.onResult(null, new MongoSocketClosedException("Can not read from a closed socket", getServerAddress()));
return;
}
ByteBufferBsonOutput bsonOutput = new ByteBufferBsonOutput(this);
ByteBufferBsonOutput compressedBsonOutput = new ByteBufferBsonOutput(this);
try {
message.encode(bsonOutput, sessionContext);
CommandEventSender commandEventSender = createCommandEventSender(message, bsonOutput, requestContext);
commandEventSender.sendStartedEvent();
Compressor localSendCompressor = sendCompressor;
if (localSendCompressor == null || SECURITY_SENSITIVE_COMMANDS.contains(message.getCommandDocument(bsonOutput).getFirstKey())) {
sendCommandMessageAsync(message.getId(), decoder, sessionContext, callback, bsonOutput, commandEventSender,
message.isResponseExpected());
} else {
List byteBuffers = bsonOutput.getByteBuffers();
try {
CompressedMessage compressedMessage = new CompressedMessage(message.getOpCode(), byteBuffers, localSendCompressor,
getMessageSettings(description));
compressedMessage.encode(compressedBsonOutput, sessionContext);
} finally {
releaseAllBuffers(byteBuffers);
bsonOutput.close();
}
sendCommandMessageAsync(message.getId(), decoder, sessionContext, callback, compressedBsonOutput, commandEventSender,
message.isResponseExpected());
}
} catch (Throwable t) {
bsonOutput.close();
compressedBsonOutput.close();
callback.onResult(null, t);
}
}
private void releaseAllBuffers(final List byteBuffers) {
for (ByteBuf cur : byteBuffers) {
cur.release();
}
}
private void sendCommandMessageAsync(final int messageId, final Decoder decoder, final SessionContext sessionContext,
final SingleResultCallback callback, final ByteBufferBsonOutput bsonOutput,
final CommandEventSender commandEventSender, final boolean responseExpected) {
sendMessageAsync(bsonOutput.getByteBuffers(), messageId, (result, t) -> {
bsonOutput.close();
if (t != null) {
commandEventSender.sendFailedEvent(t);
callback.onResult(null, t);
} else if (!responseExpected) {
commandEventSender.sendSucceededEventForOneWayCommand();
callback.onResult(null, null);
} else {
readAsync(MESSAGE_HEADER_LENGTH, new MessageHeaderCallback((responseBuffers, t1) -> {
if (t1 != null) {
commandEventSender.sendFailedEvent(t1);
callback.onResult(null, t1);
return;
}
assertNotNull(responseBuffers);
try {
updateSessionContext(sessionContext, responseBuffers);
boolean commandOk =
isCommandOk(new BsonBinaryReader(new ByteBufferBsonInput(responseBuffers.getBodyByteBuffer())));
responseBuffers.reset();
if (!commandOk) {
MongoException commandFailureException = getCommandFailureException(
responseBuffers.getResponseDocument(messageId, new BsonDocumentCodec()),
description.getServerAddress());
commandEventSender.sendFailedEvent(commandFailureException);
throw commandFailureException;
}
commandEventSender.sendSucceededEvent(responseBuffers);
T result1 = getCommandResult(decoder, responseBuffers, messageId);
callback.onResult(result1, null);
} catch (Throwable localThrowable) {
callback.onResult(null, localThrowable);
} finally {
responseBuffers.close();
}
}));
}
});
}
private T getCommandResult(final Decoder decoder, final ResponseBuffers responseBuffers, final int messageId) {
T result = new ReplyMessage<>(responseBuffers, decoder, messageId).getDocuments().get(0);
MongoException writeConcernBasedError = createSpecialWriteConcernException(responseBuffers, description.getServerAddress());
if (writeConcernBasedError != null) {
throw new MongoWriteConcernWithResponseException(writeConcernBasedError, result);
}
return result;
}
@Override
public void sendMessage(final List byteBuffers, final int lastRequestId) {
notNull("stream is open", stream);
if (isClosed()) {
throw new MongoSocketClosedException("Cannot write to a closed stream", getServerAddress());
}
try {
stream.write(byteBuffers);
} catch (Exception e) {
close();
throw translateWriteException(e);
}
}
@Override
public ResponseBuffers receiveMessage(final int responseTo) {
notNull("stream is open", stream);
if (isClosed()) {
throw new MongoSocketClosedException("Cannot read from a closed stream", getServerAddress());
}
return receiveMessageWithAdditionalTimeout(0);
}
private ResponseBuffers receiveMessageWithAdditionalTimeout(final int additionalTimeout) {
try {
return receiveResponseBuffers(additionalTimeout);
} catch (Throwable t) {
close();
throw translateReadException(t);
}
}
@Override
public void sendMessageAsync(final List byteBuffers, final int lastRequestId, final SingleResultCallback callback) {
notNull("stream is open", stream, callback);
if (isClosed()) {
callback.onResult(null, new MongoSocketClosedException("Can not read from a closed socket", getServerAddress()));
return;
}
writeAsync(byteBuffers, errorHandlingCallback(callback, LOGGER));
}
private void writeAsync(final List byteBuffers, final SingleResultCallback callback) {
try {
stream.writeAsync(byteBuffers, new AsyncCompletionHandler() {
@Override
public void completed(@Nullable final Void v) {
callback.onResult(null, null);
}
@Override
public void failed(final Throwable t) {
close();
callback.onResult(null, translateWriteException(t));
}
});
} catch (Throwable t) {
close();
callback.onResult(null, t);
}
}
@Override
public void receiveMessageAsync(final int responseTo, final SingleResultCallback callback) {
isTrue("stream is open", stream != null, callback);
if (isClosed()) {
callback.onResult(null, new MongoSocketClosedException("Can not read from a closed socket", getServerAddress()));
return;
}
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(format("Start receiving response on %s", getId()));
}
readAsync(MESSAGE_HEADER_LENGTH, new MessageHeaderCallback((result, t) -> {
if (t != null) {
close();
callback.onResult(null, t);
} else {
callback.onResult(result, null);
}
}));
}
private void readAsync(final int numBytes, final SingleResultCallback callback) {
if (isClosed()) {
callback.onResult(null, new MongoSocketClosedException("Cannot read from a closed stream", getServerAddress()));
return;
}
try {
stream.readAsync(numBytes, new AsyncCompletionHandler() {
@Override
public void completed(@Nullable final ByteBuf buffer) {
callback.onResult(buffer, null);
}
@Override
public void failed(final Throwable t) {
close();
callback.onResult(null, translateReadException(t));
}
});
} catch (Exception e) {
close();
callback.onResult(null, translateReadException(e));
}
}
private ConnectionId getId() {
return description.getConnectionId();
}
private ServerAddress getServerAddress() {
return description.getServerAddress();
}
private void updateSessionContext(final SessionContext sessionContext, final ResponseBuffers responseBuffers) {
sessionContext.advanceOperationTime(getOperationTime(responseBuffers));
sessionContext.advanceClusterTime(getClusterTime(responseBuffers));
sessionContext.setSnapshotTimestamp(getSnapshotTimestamp(responseBuffers));
if (sessionContext.hasActiveTransaction()) {
BsonDocument recoveryToken = getRecoveryToken(responseBuffers);
if (recoveryToken != null) {
sessionContext.setRecoveryToken(recoveryToken);
}
}
}
private MongoException translateWriteException(final Throwable e) {
if (e instanceof MongoException) {
return (MongoException) e;
} else if (e instanceof IOException) {
return new MongoSocketWriteException("Exception sending message", getServerAddress(), e);
} else if (e instanceof InterruptedException) {
return new MongoInternalException("Thread interrupted exception", e);
} else {
return new MongoInternalException("Unexpected exception", e);
}
}
private MongoException translateReadException(final Throwable e) {
if (e instanceof MongoException) {
return (MongoException) e;
} else if (e instanceof SocketTimeoutException) {
return new MongoSocketReadTimeoutException("Timeout while receiving message", getServerAddress(), e);
} else if (e instanceof InterruptedIOException) {
return new MongoInterruptedException("Interrupted while receiving message", (InterruptedIOException) e);
} else if (e instanceof ClosedByInterruptException) {
return new MongoInterruptedException("Interrupted while receiving message", (ClosedByInterruptException) e);
} else if (e instanceof IOException) {
return new MongoSocketReadException("Exception receiving message", getServerAddress(), e);
} else if (e instanceof RuntimeException) {
return new MongoInternalException("Unexpected runtime exception", e);
} else if (e instanceof InterruptedException) {
return new MongoInternalException("Interrupted exception", e);
} else {
return new MongoInternalException("Unexpected exception", e);
}
}
private ResponseBuffers receiveResponseBuffers(final int additionalTimeout) throws IOException {
ByteBuf messageHeaderBuffer = stream.read(MESSAGE_HEADER_LENGTH, additionalTimeout);
MessageHeader messageHeader;
try {
messageHeader = new MessageHeader(messageHeaderBuffer, description.getMaxMessageSize());
} finally {
messageHeaderBuffer.release();
}
ByteBuf messageBuffer = stream.read(messageHeader.getMessageLength() - MESSAGE_HEADER_LENGTH, additionalTimeout);
boolean releaseMessageBuffer = true;
try {
if (messageHeader.getOpCode() == OP_COMPRESSED.getValue()) {
CompressedHeader compressedHeader = new CompressedHeader(messageBuffer, messageHeader);
Compressor compressor = getCompressor(compressedHeader);
ByteBuf buffer = getBuffer(compressedHeader.getUncompressedSize());
compressor.uncompress(messageBuffer, buffer);
buffer.flip();
return new ResponseBuffers(new ReplyHeader(buffer, compressedHeader), buffer);
} else {
ResponseBuffers responseBuffers = new ResponseBuffers(new ReplyHeader(messageBuffer, messageHeader), messageBuffer);
releaseMessageBuffer = false;
return responseBuffers;
}
} finally {
if (releaseMessageBuffer) {
messageBuffer.release();
}
}
}
private Compressor getCompressor(final CompressedHeader compressedHeader) {
Compressor compressor = compressorMap.get(compressedHeader.getCompressorId());
if (compressor == null) {
throw new MongoClientException("Unsupported compressor with identifier " + compressedHeader.getCompressorId());
}
return compressor;
}
@Override
public ByteBuf getBuffer(final int size) {
notNull("open", stream);
return stream.getBuffer(size);
}
private class MessageHeaderCallback implements SingleResultCallback {
private final SingleResultCallback callback;
MessageHeaderCallback(final SingleResultCallback callback) {
this.callback = callback;
}
@Override
public void onResult(@Nullable final ByteBuf result, @Nullable final Throwable t) {
if (t != null) {
callback.onResult(null, t);
return;
}
try {
assertNotNull(result);
MessageHeader messageHeader = new MessageHeader(result, description.getMaxMessageSize());
readAsync(messageHeader.getMessageLength() - MESSAGE_HEADER_LENGTH, new MessageCallback(messageHeader));
} catch (Throwable localThrowable) {
callback.onResult(null, localThrowable);
} finally {
if (result != null) {
result.release();
}
}
}
private class MessageCallback implements SingleResultCallback {
private final MessageHeader messageHeader;
MessageCallback(final MessageHeader messageHeader) {
this.messageHeader = messageHeader;
}
@Override
public void onResult(@Nullable final ByteBuf result, @Nullable final Throwable t) {
if (t != null) {
callback.onResult(null, t);
return;
}
boolean releaseResult = true;
assertNotNull(result);
try {
ReplyHeader replyHeader;
ByteBuf responseBuffer;
if (messageHeader.getOpCode() == OP_COMPRESSED.getValue()) {
try {
CompressedHeader compressedHeader = new CompressedHeader(result, messageHeader);
Compressor compressor = getCompressor(compressedHeader);
ByteBuf buffer = getBuffer(compressedHeader.getUncompressedSize());
compressor.uncompress(result, buffer);
buffer.flip();
replyHeader = new ReplyHeader(buffer, compressedHeader);
responseBuffer = buffer;
} finally {
releaseResult = false;
result.release();
}
} else {
replyHeader = new ReplyHeader(result, messageHeader);
responseBuffer = result;
releaseResult = false;
}
callback.onResult(new ResponseBuffers(replyHeader, responseBuffer), null);
} catch (Throwable localThrowable) {
callback.onResult(null, localThrowable);
} finally {
if (releaseResult) {
result.release();
}
}
}
}
}
private static final StructuredLogger COMMAND_PROTOCOL_LOGGER = new StructuredLogger("protocol.command");
private CommandEventSender createCommandEventSender(final CommandMessage message, final ByteBufferBsonOutput bsonOutput,
final RequestContext requestContext) {
if (!isMonitoringConnection && opened() && (commandListener != null || COMMAND_PROTOCOL_LOGGER.isRequired(DEBUG, getClusterId()))) {
return new LoggingCommandEventSender(SECURITY_SENSITIVE_COMMANDS, SECURITY_SENSITIVE_HELLO_COMMANDS, description,
commandListener, requestContext, message, bsonOutput, COMMAND_PROTOCOL_LOGGER, loggerSettings);
} else {
return new NoOpCommandEventSender();
}
}
private ClusterId getClusterId() {
return description.getConnectionId().getServerId().getClusterId();
}
}