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node-task/node_modules/mysql2/lib/commands/binlog_dump.js

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2014-09-24 17:56:53 -04:00
var Command = require('./command');
var util = require('util');
var CommandCode = require('../constants/commands');
var Packets = require('../packets');
function BinlogDump(opts)
{
Command.call(this);
//this.onResult = callback;
this.opts = opts;
}
util.inherits(BinlogDump, Command);
BinlogDump.prototype.start = function(packet, connection) {
var packet = new Packets.BinlogDump(this.opts);
connection.writePacket(packet.toPacket(1));
return BinlogDump.prototype.binlogData;
};
function BinlogEventHeader(packet) {
this.timestamp = packet.readInt32();
this.eventType = packet.readInt8();
this.serverId = packet.readInt32();
this.eventSize = packet.readInt32();
this.logPos = packet.readInt32();
this.flags = packet.readInt16();
}
function RotateEvent(packet) {
this.pposition = packet.readInt32();
// TODO: read uint64 here
var positionDword2 = packet.readInt32();
this.nextBinlog = packet.readString();
this.name = 'RotateEvent';
}
function FormatDescriptionEvent(packet) {
this.binlogVersion = packet.readInt16();
this.serverVersion = packet.readString(50).replace(/\u0000.*/, '');
this.createTimestamp = packet.readInt32();
this.eventHeaderLength = packet.readInt8(); // should be 19
this.eventsLength = packet.readBuffer();
this.name = 'FormatDescriptionEvent';
}
function QueryEvent(packet) {
var parseStatusVars = require('../packets/binlog_query_statusvars.js');
this.slaveProxyId = packet.readInt32();
this.executionTime = packet.readInt32();
var schemaLength = packet.readInt8();
this.errorCode = packet.readInt16();
var statusVarsLength = packet.readInt16();
var statusVars = packet.readBuffer(statusVarsLength);
this.schema = packet.readString(schemaLength);
packet.readInt8(); // should be zero
this.statusVars = parseStatusVars(statusVars);
this.query = packet.readString();
this.name = 'QueryEvent';
}
function XidEvent(packet) {
this.binlogVersion = packet.readInt16();
this.xid = packet.readInt64();
this.name = 'XidEvent';
}
var eventParsers = [];
eventParsers[2] = QueryEvent;
eventParsers[4] = RotateEvent;
eventParsers[15] = FormatDescriptionEvent;
eventParsers[16] = XidEvent;
BinlogDump.prototype.binlogData = function(packet) {
// ok - continue consuming events
// error - error
// eof - end of binlog
if (packet.isEOF()) {
this.emit('eof');
return null;
}
// binlog event header
var ok = packet.readInt8();
var header = new BinlogEventHeader(packet);
var EventParser = eventParsers[header.eventType];
var event;
if (EventParser)
event = new EventParser(packet);
else {
event = {
name: 'UNKNOWN'
}
}
event.header = header;
this.emit('event', event);
return BinlogDump.prototype.binlogData;
};
module.exports = BinlogDump;