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com.mysql.cj.protocol.a.NativeMessageBuilder Maven / Gradle / Ivy
/*
* Copyright (c) 2017, 2022, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj.protocol.a;
import java.util.List;
import com.mysql.cj.BindValue;
import com.mysql.cj.Constants;
import com.mysql.cj.MessageBuilder;
import com.mysql.cj.Messages;
import com.mysql.cj.NativeSession;
import com.mysql.cj.PreparedQuery;
import com.mysql.cj.QueryAttributesBindings;
import com.mysql.cj.QueryBindings;
import com.mysql.cj.Session;
import com.mysql.cj.conf.PropertyKey;
import com.mysql.cj.exceptions.CJOperationNotSupportedException;
import com.mysql.cj.exceptions.ExceptionFactory;
import com.mysql.cj.protocol.a.NativeConstants.IntegerDataType;
import com.mysql.cj.protocol.a.NativeConstants.StringLengthDataType;
import com.mysql.cj.protocol.a.NativeConstants.StringSelfDataType;
import com.mysql.cj.util.StringUtils;
public class NativeMessageBuilder implements MessageBuilder {
private boolean supportsQueryAttributes = true;
public NativeMessageBuilder(boolean supportsQueryAttributes) {
this.supportsQueryAttributes = supportsQueryAttributes;
}
@Override
public NativePacketPayload buildSqlStatement(String statement) {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, "Not supported");
}
@Override
public NativePacketPayload buildSqlStatement(String statement, List args) {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, "Not supported");
}
@Override
public NativePacketPayload buildClose() {
throw ExceptionFactory.createException(CJOperationNotSupportedException.class, "Not supported");
}
public NativePacketPayload buildComQuery(NativePacketPayload sharedPacket, byte[] query) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(query.length + 1);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_QUERY);
if (this.supportsQueryAttributes) {
// CLIENT_QUERY_ATTRIBUTES capability has been negotiated but, since this method is used solely to run queries internally and it is not bound to any
// Statement object, no query attributes are ever set.
packet.writeInteger(IntegerDataType.INT_LENENC, 0);
packet.writeInteger(IntegerDataType.INT_LENENC, 1); // parameter_set_count (always 1)
}
packet.writeBytes(StringLengthDataType.STRING_FIXED, query);
return packet;
}
public NativePacketPayload buildComQuery(NativePacketPayload sharedPacket, String query) {
return buildComQuery(sharedPacket, StringUtils.getBytes(query));
}
public NativePacketPayload buildComQuery(NativePacketPayload sharedPacket, String query, String encoding) {
return buildComQuery(sharedPacket, StringUtils.getBytes(query, encoding));
}
public NativePacketPayload buildComQuery(NativePacketPayload sharedPacket, Session sess, PreparedQuery preparedQuery, QueryBindings bindings,
String characterEncoding) {
NativePacketPayload sendPacket = sharedPacket != null ? sharedPacket : new NativePacketPayload(9);
QueryAttributesBindings queryAttributesBindings = preparedQuery.getQueryAttributesBindings();
synchronized (this) {
BindValue[] bindValues = bindings.getBindValues();
sendPacket.writeInteger(IntegerDataType.INT1, NativeConstants.COM_QUERY);
if (this.supportsQueryAttributes) {
if (queryAttributesBindings.getCount() > 0) {
sendPacket.writeInteger(IntegerDataType.INT_LENENC, queryAttributesBindings.getCount());
sendPacket.writeInteger(IntegerDataType.INT_LENENC, 1); // parameter_set_count (always 1)
byte[] nullBitsBuffer = new byte[(queryAttributesBindings.getCount() + 7) / 8];
for (int i = 0; i < queryAttributesBindings.getCount(); i++) {
if (queryAttributesBindings.getAttributeValue(i).isNull()) {
nullBitsBuffer[i >>> 3] |= 1 << (i & 7);
}
}
sendPacket.writeBytes(StringLengthDataType.STRING_VAR, nullBitsBuffer);
sendPacket.writeInteger(IntegerDataType.INT1, 1); // new_params_bind_flag (always 1)
queryAttributesBindings.runThroughAll(a -> {
sendPacket.writeInteger(IntegerDataType.INT2, a.getFieldType());
sendPacket.writeBytes(StringSelfDataType.STRING_LENENC, a.getName().getBytes());
});
queryAttributesBindings.runThroughAll(a -> {
if (!a.isNull()) {
a.writeAsQueryAttribute(sendPacket);
}
});
} else {
sendPacket.writeInteger(IntegerDataType.INT_LENENC, 0);
sendPacket.writeInteger(IntegerDataType.INT_LENENC, 1); // parameter_set_count (always 1)
}
} else if (queryAttributesBindings.getCount() > 0) {
sess.getLog().logWarn(Messages.getString("QueryAttributes.SetButNotSupported"));
}
sendPacket.setTag("QUERY");
boolean useStreamLengths = sess.getPropertySet().getBooleanProperty(PropertyKey.useStreamLengthsInPrepStmts).getValue();
//
// Try and get this allocation as close as possible for BLOBs
//
int ensurePacketSize = 0;
String statementComment = ((NativeSession) sess).getProtocol().getQueryComment();
byte[] commentAsBytes = null;
if (statementComment != null) {
commentAsBytes = StringUtils.getBytes(statementComment, characterEncoding);
ensurePacketSize += commentAsBytes.length;
ensurePacketSize += 6; // for /*[space] [space]*/
}
for (int i = 0; i < bindValues.length; i++) {
if (bindValues[i].isStream() && useStreamLengths) {
ensurePacketSize += bindValues[i].getScaleOrLength();
}
}
if (ensurePacketSize != 0) {
sendPacket.ensureCapacity(ensurePacketSize);
}
if (commentAsBytes != null) {
sendPacket.writeBytes(StringLengthDataType.STRING_FIXED, Constants.SLASH_STAR_SPACE_AS_BYTES);
sendPacket.writeBytes(StringLengthDataType.STRING_FIXED, commentAsBytes);
sendPacket.writeBytes(StringLengthDataType.STRING_FIXED, Constants.SPACE_STAR_SLASH_SPACE_AS_BYTES);
}
byte[][] staticSqlStrings = preparedQuery.getQueryInfo().getStaticSqlParts();
for (int i = 0; i < bindValues.length; i++) {
bindings.checkParameterSet(i);
sendPacket.writeBytes(StringLengthDataType.STRING_FIXED, staticSqlStrings[i]);
bindValues[i].writeAsText(sendPacket);
}
sendPacket.writeBytes(StringLengthDataType.STRING_FIXED, staticSqlStrings[bindValues.length]);
return sendPacket;
}
}
public NativePacketPayload buildComInitDb(NativePacketPayload sharedPacket, byte[] dbName) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(dbName.length + 1);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_INIT_DB);
packet.writeBytes(StringLengthDataType.STRING_FIXED, dbName);
return packet;
}
public NativePacketPayload buildComInitDb(NativePacketPayload sharedPacket, String dbName) {
return buildComInitDb(sharedPacket, StringUtils.getBytes(dbName));
}
public NativePacketPayload buildComShutdown(NativePacketPayload sharedPacket) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(1);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_SHUTDOWN);
return packet;
}
public NativePacketPayload buildComSetOption(NativePacketPayload sharedPacket, int val) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(3);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_SET_OPTION);
packet.writeInteger(IntegerDataType.INT2, val);
return packet;
}
public NativePacketPayload buildComPing(NativePacketPayload sharedPacket) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(1);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_PING);
return packet;
}
public NativePacketPayload buildComQuit(NativePacketPayload sharedPacket) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(1);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_QUIT);
return packet;
}
public NativePacketPayload buildComStmtPrepare(NativePacketPayload sharedPacket, byte[] query) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(query.length + 1);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_STMT_PREPARE);
packet.writeBytes(StringLengthDataType.STRING_FIXED, query);
return packet;
}
public NativePacketPayload buildComStmtPrepare(NativePacketPayload sharedPacket, String queryString, String characterEncoding) {
return buildComStmtPrepare(sharedPacket, StringUtils.getBytes(queryString, characterEncoding));
}
public NativePacketPayload buildComStmtClose(NativePacketPayload sharedPacket, long serverStatementId) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(5);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_STMT_CLOSE);
packet.writeInteger(IntegerDataType.INT4, serverStatementId);
return packet;
}
public NativePacketPayload buildComStmtReset(NativePacketPayload sharedPacket, long serverStatementId) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(5);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_STMT_RESET);
packet.writeInteger(IntegerDataType.INT4, serverStatementId);
return packet;
}
public NativePacketPayload buildComStmtFetch(NativePacketPayload sharedPacket, long serverStatementId, long numRowsToFetch) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(9);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_STMT_FETCH);
packet.writeInteger(IntegerDataType.INT4, serverStatementId);
packet.writeInteger(IntegerDataType.INT4, numRowsToFetch);
return packet;
}
public NativePacketPayload buildComStmtSendLongData(NativePacketPayload sharedPacket, long serverStatementId, int parameterIndex, byte[] longData) {
NativePacketPayload packet = buildComStmtSendLongDataHeader(sharedPacket, serverStatementId, parameterIndex);
packet.writeBytes(StringLengthDataType.STRING_FIXED, longData);
return packet;
}
public NativePacketPayload buildComStmtSendLongDataHeader(NativePacketPayload sharedPacket, long serverStatementId, int parameterIndex) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(9);
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_STMT_SEND_LONG_DATA);
packet.writeInteger(IntegerDataType.INT4, serverStatementId);
packet.writeInteger(IntegerDataType.INT2, parameterIndex);
return packet;
}
public NativePacketPayload buildComStmtExecute(NativePacketPayload sharedPacket, long serverStatementId, byte flags, boolean sendQueryAttributes,
PreparedQuery preparedQuery) {
NativePacketPayload packet = sharedPacket != null ? sharedPacket : new NativePacketPayload(5);
int parameterCount = preparedQuery.getParameterCount();
QueryBindings queryBindings = preparedQuery.getQueryBindings();
BindValue[] parameterBindings = queryBindings.getBindValues();
QueryAttributesBindings queryAttributesBindings = preparedQuery.getQueryAttributesBindings();
packet.writeInteger(IntegerDataType.INT1, NativeConstants.COM_STMT_EXECUTE);
packet.writeInteger(IntegerDataType.INT4, serverStatementId);
packet.writeInteger(IntegerDataType.INT1, flags);
packet.writeInteger(IntegerDataType.INT4, 1); // placeholder for parameter iterations
int parametersAndAttributesCount = parameterCount;
if (this.supportsQueryAttributes) {
if (sendQueryAttributes) {
parametersAndAttributesCount += queryAttributesBindings.getCount();
}
if (sendQueryAttributes || parametersAndAttributesCount > 0) {
// Servers between 8.0.23 and 8.0.25 don't expect a 'parameter_count' value if the statement was prepared without parameters.
packet.writeInteger(IntegerDataType.INT_LENENC, parametersAndAttributesCount);
}
}
if (parametersAndAttributesCount > 0) {
/* Reserve place for null-marker bytes */
int nullCount = (parametersAndAttributesCount + 7) / 8;
int nullBitsPosition = packet.getPosition();
for (int i = 0; i < nullCount; i++) {
packet.writeInteger(IntegerDataType.INT1, 0);
}
byte[] nullBitsBuffer = new byte[nullCount];
// In case if buffers (type) changed or there are query attributes to send.
if (queryBindings.getSendTypesToServer().get() || sendQueryAttributes && queryAttributesBindings.getCount() > 0) {
packet.writeInteger(IntegerDataType.INT1, 1);
// Store types of parameters in the first package that is sent to the server.
for (int i = 0; i < parameterCount; i++) {
packet.writeInteger(IntegerDataType.INT2, parameterBindings[i].getFieldType());
if (this.supportsQueryAttributes) {
packet.writeBytes(StringSelfDataType.STRING_LENENC, "".getBytes()); // Parameters have no names.
}
}
if (sendQueryAttributes) {
queryAttributesBindings.runThroughAll(a -> {
packet.writeInteger(IntegerDataType.INT2, a.getFieldType());
packet.writeBytes(StringSelfDataType.STRING_LENENC, a.getName().getBytes());
});
}
} else {
packet.writeInteger(IntegerDataType.INT1, 0);
}
// Store the parameter values.
for (int i = 0; i < parameterCount; i++) {
if (!parameterBindings[i].isStream()) {
if (!parameterBindings[i].isNull()) {
parameterBindings[i].writeAsBinary(packet);
} else {
nullBitsBuffer[i >>> 3] |= (1 << (i & 7));
}
}
}
if (sendQueryAttributes) {
for (int i = 0; i < queryAttributesBindings.getCount(); i++) {
if (queryAttributesBindings.getAttributeValue(i).isNull()) {
int b = i + parameterCount;
nullBitsBuffer[b >>> 3] |= 1 << (b & 7);
}
}
queryAttributesBindings.runThroughAll(a -> {
if (!a.isNull()) {
a.writeAsQueryAttribute(packet);
}
});
}
// Go back and write the NULL flags to the beginning of the packet
int endPosition = packet.getPosition();
packet.setPosition(nullBitsPosition);
packet.writeBytes(StringLengthDataType.STRING_FIXED, nullBitsBuffer);
packet.setPosition(endPosition);
}
return packet;
}
}
