//This builds BinlogResponse for each transaction.
func (blp *Blp) buildTxnResponse() (txnResponseList []*mysqlctl.BinlogResponse, dmlCount int64) {
var line []byte
var keyspaceIdStr string
var keyspaceId key.KeyspaceId
dmlBuffer := make([]string, 0, 10)
for _, event := range blp.txnLineBuffer {
line = event.LogLine
if bytes.HasPrefix(line, mysqlctl.BINLOG_BEGIN) {
streamBuf := new(mysqlctl.BinlogResponse)
streamBuf.BlPosition = event.BlPosition
streamBuf.SqlType = mysqlctl.BEGIN
txnResponseList = append(txnResponseList, streamBuf)
continue
}
if bytes.HasPrefix(line, mysqlctl.BINLOG_COMMIT) {
commitEvent := createCommitEvent(event)
txnResponseList = append(txnResponseList, commitEvent)
continue
}
sqlType := mysqlctl.GetSqlType(event.firstKw)
if sqlType == mysqlctl.DML {
keyspaceIdStr, keyspaceId = parseKeyspaceId(line, mysqlctl.GetDmlType(event.firstKw))
if keyspaceIdStr == "" {
continue
}
if !blp.keyspaceRange.Contains(keyspaceId) {
dmlBuffer = dmlBuffer[:0]
continue
}
dmlCount += 1
//extract keyspace id - match it with client's request,
//extract index ids.
dmlBuffer = append(dmlBuffer, string(line))
dmlEvent := blp.createDmlEvent(event, keyspaceIdStr)
dmlEvent.Sql = make([]string, len(dmlBuffer))
dmlLines := copy(dmlEvent.Sql, dmlBuffer)
if dmlLines < len(dmlBuffer) {
relog.Warning("The entire dml buffer was not properly copied")
}
txnResponseList = append(txnResponseList, dmlEvent)
dmlBuffer = dmlBuffer[:0]
} else {
//add as prefixes to the DML from last DML.
//start a new dml buffer and keep adding to it.
dmlBuffer = append(dmlBuffer, string(line))
}
}
return txnResponseList, dmlCount
}
func (blp *Blp) parseEventData(sendReply mysqlctl.SendUpdateStreamResponse, event *eventBuffer) {
if bytes.HasPrefix(event.LogLine, mysqlctl.BINLOG_SET_TIMESTAMP) {
blp.extractEventTimestamp(event)
blp.initialSeek = false
if blp.inTxn {
blp.txnLineBuffer = append(blp.txnLineBuffer, event)
}
} else if bytes.HasPrefix(event.LogLine, mysqlctl.BINLOG_BEGIN) {
blp.handleBeginEvent(event)
} else if bytes.HasPrefix(event.LogLine, mysqlctl.BINLOG_ROLLBACK) {
blp.inTxn = false
blp.txnLineBuffer = blp.txnLineBuffer[:0]
} else if bytes.HasPrefix(event.LogLine, mysqlctl.BINLOG_COMMIT) {
blp.handleCommitEvent(sendReply, event)
blp.inTxn = false
blp.txnLineBuffer = blp.txnLineBuffer[:0]
} else if len(event.LogLine) > 0 {
sqlType := mysqlctl.GetSqlType(event.firstKw)
if blp.inTxn && mysqlctl.IsTxnStatement(event.LogLine, event.firstKw) {
blp.txnLineBuffer = append(blp.txnLineBuffer, event)
} else if sqlType == mysqlctl.DDL {
blp.handleDdlEvent(sendReply, event)
} else {
if sqlType == mysqlctl.DML {
lineBuf := make([][]byte, 0, 10)
for _, dml := range blp.txnLineBuffer {
lineBuf = append(lineBuf, dml.LogLine)
}
panic(NewBinlogParseError(fmt.Sprintf("DML outside a txn - len %v, dml '%v', txn buffer '%v'", len(blp.txnLineBuffer), string(event.LogLine), string(bytes.Join(lineBuf, mysqlctl.SEMICOLON_BYTE)))))
}
//Ignore these often occuring statement types.
if !mysqlctl.IgnoredStatement(event.LogLine) {
relog.Warning("Unknown statement '%v'", string(event.LogLine))
}
}
}
}
