105 lines
2.8 KiB
JavaScript
105 lines
2.8 KiB
JavaScript
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var Command = require('./command');
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var util = require('util');
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var CommandCode = require('../constants/commands');
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var Packets = require('../packets');
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function BinlogDump(opts)
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{
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Command.call(this);
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//this.onResult = callback;
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this.opts = opts;
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}
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util.inherits(BinlogDump, Command);
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BinlogDump.prototype.start = function(packet, connection) {
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var packet = new Packets.BinlogDump(this.opts);
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connection.writePacket(packet.toPacket(1));
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return BinlogDump.prototype.binlogData;
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};
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function BinlogEventHeader(packet) {
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this.timestamp = packet.readInt32();
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this.eventType = packet.readInt8();
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this.serverId = packet.readInt32();
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this.eventSize = packet.readInt32();
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this.logPos = packet.readInt32();
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this.flags = packet.readInt16();
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}
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function RotateEvent(packet) {
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this.pposition = packet.readInt32();
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// TODO: read uint64 here
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var positionDword2 = packet.readInt32();
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this.nextBinlog = packet.readString();
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this.name = 'RotateEvent';
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}
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function FormatDescriptionEvent(packet) {
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this.binlogVersion = packet.readInt16();
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this.serverVersion = packet.readString(50).replace(/\u0000.*/, '');
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this.createTimestamp = packet.readInt32();
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this.eventHeaderLength = packet.readInt8(); // should be 19
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this.eventsLength = packet.readBuffer();
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this.name = 'FormatDescriptionEvent';
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}
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function QueryEvent(packet) {
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var parseStatusVars = require('../packets/binlog_query_statusvars.js');
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this.slaveProxyId = packet.readInt32();
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this.executionTime = packet.readInt32();
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var schemaLength = packet.readInt8();
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this.errorCode = packet.readInt16();
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var statusVarsLength = packet.readInt16();
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var statusVars = packet.readBuffer(statusVarsLength);
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this.schema = packet.readString(schemaLength);
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packet.readInt8(); // should be zero
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this.statusVars = parseStatusVars(statusVars);
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this.query = packet.readString();
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this.name = 'QueryEvent';
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}
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function XidEvent(packet) {
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this.binlogVersion = packet.readInt16();
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this.xid = packet.readInt64();
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this.name = 'XidEvent';
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}
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var eventParsers = [];
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eventParsers[2] = QueryEvent;
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eventParsers[4] = RotateEvent;
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eventParsers[15] = FormatDescriptionEvent;
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eventParsers[16] = XidEvent;
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BinlogDump.prototype.binlogData = function(packet) {
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// ok - continue consuming events
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// error - error
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// eof - end of binlog
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if (packet.isEOF()) {
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this.emit('eof');
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return null;
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}
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// binlog event header
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var ok = packet.readInt8();
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var header = new BinlogEventHeader(packet);
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var EventParser = eventParsers[header.eventType];
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var event;
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if (EventParser)
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event = new EventParser(packet);
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else {
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event = {
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name: 'UNKNOWN'
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}
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}
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event.header = header;
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this.emit('event', event);
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return BinlogDump.prototype.binlogData;
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};
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module.exports = BinlogDump;
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