/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code 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 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package org.opencloudb.response;
import java.nio.ByteBuffer;
import org.opencloudb.MycatServer;
import org.opencloudb.backend.BackendConnection;
import org.opencloudb.buffer.BufferQueue;
import org.opencloudb.config.Fields;
import org.opencloudb.manager.ManagerConnection;
import org.opencloudb.mysql.PacketUtil;
import org.opencloudb.mysql.nio.MySQLConnection;
import org.opencloudb.net.BackendAIOConnection;
import org.opencloudb.net.NIOProcessor;
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.util.IntegerUtil;
import org.opencloudb.util.LongUtil;
import org.opencloudb.util.StringUtil;
import org.opencloudb.util.TimeUtil;
/**
* 查询后端连接
*
* @author mycat
*/
public class ShowBackend {
private static final int FIELD_COUNT = 16;
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("processor",
Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("id", Fields.FIELD_TYPE_LONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("mysqlId", Fields.FIELD_TYPE_LONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("host", Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("port", Fields.FIELD_TYPE_LONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("l_port", Fields.FIELD_TYPE_LONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("net_in", Fields.FIELD_TYPE_LONGLONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("net_out", Fields.FIELD_TYPE_LONGLONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("life", Fields.FIELD_TYPE_LONGLONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("closed", Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("run", Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("borrowed",
Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("SEND_QUEUE", Fields.FIELD_TYPE_LONG);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("schema", Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil
.getField("txlevel", Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
fields[i] = PacketUtil.getField("autocommit",
Fields.FIELD_TYPE_VAR_STRING);
fields[i++].packetId = ++packetId;
eof.packetId = ++packetId;
}
public static void execute(ManagerConnection c) {
ByteBuffer buffer = c.allocate();
buffer = header.write(buffer, c, true);
for (FieldPacket field : fields) {
buffer = field.write(buffer, c, true);
}
buffer = eof.write(buffer, c, true);
byte packetId = eof.packetId;
String charset = c.getCharset();
for (NIOProcessor p : MycatServer.getInstance().getProcessors()) {
for (BackendConnection bc : p.getBackends().values()) {
if (bc != null) {
RowDataPacket row = getRow(bc, charset);
row.packetId = ++packetId;
buffer = row.write(buffer, c, true);
}
}
}
EOFPacket lastEof = new EOFPacket();
lastEof.packetId = ++packetId;
buffer = lastEof.write(buffer, c, true);
c.write(buffer);
}
private static RowDataPacket getRow(BackendConnection c, String charset) {
RowDataPacket row = new RowDataPacket(FIELD_COUNT);
if (c instanceof BackendAIOConnection) {
row.add(((BackendAIOConnection) c).getProcessor().getName()
.getBytes());
} else {
row.add("N/A".getBytes());
}
row.add(LongUtil.toBytes(c.getId()));
long threadId=0;
if (c instanceof MySQLConnection) {
threadId=((MySQLConnection)c).getThreadId();
}
row.add(LongUtil.toBytes(threadId));
row.add(StringUtil.encode(c.getHost(), charset));
row.add(IntegerUtil.toBytes(c.getPort()));
row.add(IntegerUtil.toBytes(c.getLocalPort()));
row.add(LongUtil.toBytes(c.getNetInBytes()));
row.add(LongUtil.toBytes(c.getNetOutBytes()));
row.add(LongUtil.toBytes((TimeUtil.currentTimeMillis() - c
.getStartupTime()) / 1000L));
row.add(c.isClosed() ? "true".getBytes() : "false".getBytes());
boolean isRunning = c.isRunning();
row.add(isRunning ? "true".getBytes() : "false".getBytes());
boolean isBorrowed=c.isBorrowed();
row.add(isBorrowed ? "true".getBytes() : "false".getBytes());
BufferQueue bq = null;
String schema="";
String txLevel="";
String txAutommit="";
if (c instanceof MySQLConnection) {
MySQLConnection mysqlC=(MySQLConnection) c;
bq=mysqlC.getWriteQueue();
schema=mysqlC.getSchema();
txLevel=mysqlC.getTxIsolation()+"";
txAutommit=mysqlC.isAutocommit()+"";
}
row.add(IntegerUtil.toBytes(bq == null ? 0 : bq.snapshotSize()));
row.add(schema.getBytes());
row.add(txLevel.getBytes());
row.add(txAutommit.getBytes());
return row;
}
}