@Override
public T execute(final InternalConnection connection) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(
format(
"Sending command {%s : %s} to database %s on connection [%s] to server %s",
getCommandName(),
command.values().iterator().next(),
namespace.getDatabaseName(),
connection.getDescription().getConnectionId(),
connection.getDescription().getServerAddress()));
}
long startTimeNanos = System.nanoTime();
CommandMessage commandMessage =
new CommandMessage(
namespace.getFullName(),
command,
slaveOk,
fieldNameValidator,
ProtocolHelper.getMessageSettings(connection.getDescription()));
ResponseBuffers responseBuffers = null;
try {
sendMessage(commandMessage, connection);
responseBuffers = connection.receiveMessage(commandMessage.getId());
if (!ProtocolHelper.isCommandOk(
new BsonBinaryReader(new ByteBufferBsonInput(responseBuffers.getBodyByteBuffer())))) {
throw getCommandFailureException(
getResponseDocument(responseBuffers, commandMessage, new BsonDocumentCodec()),
connection.getDescription().getServerAddress());
}
T retval = getResponseDocument(responseBuffers, commandMessage, commandResultDecoder);
if (commandListener != null) {
sendSucceededEvent(
connection.getDescription(),
startTimeNanos,
commandMessage,
getResponseDocument(responseBuffers, commandMessage, new RawBsonDocumentCodec()));
}
LOGGER.debug("Command execution completed");
return retval;
} catch (RuntimeException e) {
sendFailedEvent(connection.getDescription(), startTimeNanos, commandMessage, e);
throw e;
} finally {
if (responseBuffers != null) {
responseBuffers.close();
}
}
}
@Override
public void executeAsync(
final InternalConnection connection, final SingleResultCallback<T> callback) {
long startTimeNanos = System.nanoTime();
CommandMessage message =
new CommandMessage(
namespace.getFullName(),
command,
slaveOk,
fieldNameValidator,
ProtocolHelper.getMessageSettings(connection.getDescription()));
boolean sentStartedEvent = false;
try {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(
format(
"Asynchronously sending command {%s : %s} to database %s on connection [%s] to server %s",
getCommandName(),
command.values().iterator().next(),
namespace.getDatabaseName(),
connection.getDescription().getConnectionId(),
connection.getDescription().getServerAddress()));
}
ByteBufferBsonOutput bsonOutput = new ByteBufferBsonOutput(connection);
int documentPosition =
ProtocolHelper.encodeMessageWithMetadata(message, bsonOutput).getFirstDocumentPosition();
sendStartedEvent(connection, bsonOutput, message, documentPosition);
sentStartedEvent = true;
SingleResultCallback<ResponseBuffers> receiveCallback =
new CommandResultCallback(callback, message, connection.getDescription(), startTimeNanos);
connection.sendMessageAsync(
bsonOutput.getByteBuffers(),
message.getId(),
new SendMessageCallback<T>(
connection,
bsonOutput,
message,
getCommandName(),
startTimeNanos,
commandListener,
callback,
receiveCallback));
} catch (Throwable t) {
if (sentStartedEvent) {
sendFailedEvent(connection.getDescription(), startTimeNanos, message, t);
}
callback.onResult(null, t);
}
}
private BsonDocument getCommand(final ConnectionDescription description) {
BsonDocument outputDocument =
new BsonDocument(getAction(), new BsonString(getCollectionName()));
outputDocument.append("sharded", BsonBoolean.valueOf(isSharded()));
outputDocument.append("nonAtomic", BsonBoolean.valueOf(isNonAtomic()));
if (getDatabaseName() != null) {
outputDocument.put("db", new BsonString(getDatabaseName()));
}
BsonDocument commandDocument =
new BsonDocument("mapreduce", new BsonString(namespace.getCollectionName()))
.append("map", getMapFunction())
.append("reduce", getReduceFunction())
.append("out", outputDocument)
.append("query", asValueOrNull(getFilter()))
.append("sort", asValueOrNull(getSort()))
.append("finalize", asValueOrNull(getFinalizeFunction()))
.append("scope", asValueOrNull(getScope()))
.append("verbose", BsonBoolean.valueOf(isVerbose()));
putIfNotZero(commandDocument, "limit", getLimit());
putIfNotZero(commandDocument, "maxTimeMS", getMaxTime(MILLISECONDS));
putIfTrue(commandDocument, "jsMode", isJsMode());
if (bypassDocumentValidation != null
&& description != null
&& serverIsAtLeastVersionThreeDotTwo(description)) {
commandDocument.put(
"bypassDocumentValidation", BsonBoolean.valueOf(bypassDocumentValidation));
}
if (description != null) {
appendWriteConcernToCommand(writeConcern, commandDocument, description);
}
if (collation != null) {
commandDocument.put("collation", collation.asDocument());
}
return commandDocument;
}
private CommandReadOperation<BsonDocument> createExplainableOperation(
final ExplainVerbosity explainVerbosity) {
return new CommandReadOperation<BsonDocument>(
namespace.getDatabaseName(),
ExplainHelper.asExplainCommand(getCommand(null), explainVerbosity),
new BsonDocumentCodec());
}
private void sendStartedEvent(
final InternalConnection connection,
final ByteBufferBsonOutput bsonOutput,
final CommandMessage message,
final int documentPosition) {
if (commandListener != null) {
ByteBufBsonDocument byteBufBsonDocument = createOne(bsonOutput, documentPosition);
BsonDocument commandDocument;
if (byteBufBsonDocument.containsKey("$query")) {
commandDocument = byteBufBsonDocument.getDocument("$query");
commandName = commandDocument.keySet().iterator().next();
} else {
commandDocument = byteBufBsonDocument;
commandName = byteBufBsonDocument.getFirstKey();
}
BsonDocument commandDocumentForEvent =
(SECURITY_SENSITIVE_COMMANDS.contains(commandName))
? new BsonDocument()
: commandDocument;
sendCommandStartedEvent(
message,
namespace.getDatabaseName(),
commandName,
commandDocumentForEvent,
connection.getDescription(),
commandListener);
}
}
