/*
* Copyright 2012-2015 org.opencloudb.
*
* 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 org.opencloudb.response;
import java.nio.ByteBuffer;
import org.opencloudb.MycatServer;
import org.opencloudb.config.Fields;
import org.opencloudb.manager.ManagerConnection;
import org.opencloudb.mysql.PacketUtil;
import org.opencloudb.net.mysql.EOFPacket;
import org.opencloudb.net.mysql.FieldPacket;
import org.opencloudb.net.mysql.ResultSetHeaderPacket;
import org.opencloudb.net.mysql.RowDataPacket;
import org.opencloudb.statistic.SQLRecord;
import org.opencloudb.util.IntegerUtil;
import org.opencloudb.util.LongUtil;
import org.opencloudb.util.StringUtil;
/**
* 查询执行时间超过设定阈值的SQL
*
* @author mycat
*/
public final class ShowSQLSlow {
private static final int FIELD_COUNT = 7;
private static final ResultSetHeaderPacket header = PacketUtil.getHeader(FIELD_COUNT);
private static final FieldPacket[] fields = new FieldPacket[FIELD_COUNT];
private static final EOFPacket eof = new EOFPacket();
static {
int i = 0;
byte packetId = 0;
header.packetId = ++packetId;
fields[i] = PacketUtil.getField("HOST", Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("SCHEMA", Fields.FIELD_TYPE_LONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("DATASOURCE", Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("INDEX", Fields.FIELD_TYPE_LONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("START_TIME", Fields.FIELD_TYPE_LONGLONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("EXECUTE_TIME", Fields.FIELD_TYPE_LONGLONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("SQL", Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
eof.packetId = ++packetId;
}
public static void execute(ManagerConnection c) {
ByteBuffer buffer = c.allocate();
// write header
buffer = header.write(buffer, c);
// write fields
for (FieldPacket field : fields) {
buffer = field.write(buffer, c);
}
// write eof
buffer = eof.write(buffer, c);
// write rows
byte packetId = eof.packetId;
SQLRecord[] records = MycatServer.getInstance().getSqlRecorder().getRecords();
for (int i = records.length - 1; i >= 0; i--) {
if (records[i] != null) {
RowDataPacket row = getRow(records[i], c.getCharset());
row.packetId = ++packetId;
buffer = row.write(buffer, c);
}
}
// write last eof
EOFPacket lastEof = new EOFPacket();
lastEof.packetId = ++packetId;
buffer = lastEof.write(buffer, c);
// write buffer
c.write(buffer);
}
private static RowDataPacket getRow(SQLRecord sql, String charset) {
RowDataPacket row = new RowDataPacket(FIELD_COUNT);
row.add(StringUtil.encode(sql.host, charset));
row.add(StringUtil.encode(sql.schema, charset));
row.add(StringUtil.encode(sql.dataNode, charset));
row.add(IntegerUtil.toBytes(sql.dataNodeIndex));
row.add(LongUtil.toBytes(sql.startTime));
row.add(LongUtil.toBytes(sql.executeTime));
row.add(StringUtil.encode(sql.statement, charset));
return row;
}
}