80 lines
2.3 KiB
Go
80 lines
2.3 KiB
Go
/*
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Copyright 2022 Alibaba Group Holding Limited.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package event
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import (
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"fmt"
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"io"
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"github.com/google/uuid"
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"github.com/alibaba/polardbx-operator/pkg/binlogtool/binlog/layout"
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"github.com/alibaba/polardbx-operator/pkg/binlogtool/utils"
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)
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type GTIDInterval struct {
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Start uint64 `json:"start"`
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End uint64 `json:"end"`
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}
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type SIDAndGTIDInterval struct {
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SID uuid.UUID `json:"sid,omitempty"`
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Intervals []GTIDInterval `json:"intervals,omitempty"`
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}
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func (s *SIDAndGTIDInterval) Layout(version uint32, code byte, fde *FormatDescriptionEvent) *layout.Layout {
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var intervalLen uint64
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return layout.Decl(
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layout.UUID(&s.SID),
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layout.Number(&intervalLen),
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layout.Area(layout.Infinite(), func(r io.Reader) error {
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block := make([]byte, 16*intervalLen)
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if _, err := io.ReadFull(r, block); err != nil {
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return fmt.Errorf("unable to read: %w", err)
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}
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s.Intervals = make([]GTIDInterval, intervalLen)
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for i := 0; i < int(intervalLen); i++ {
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interval := &s.Intervals[i]
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utils.ReadNumberLittleEndianHack(&interval.Start, block[i*16:i*16+8])
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utils.ReadNumberLittleEndianHack(&interval.End, block[i*16+8:i*16+16])
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}
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return nil
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}),
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)
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}
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type PreviousGTIDsEvent struct {
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SIDAndGTIDIntervals []SIDAndGTIDInterval ` json:"sid_and_gtid_intervals,omitempty"`
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}
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func (e *PreviousGTIDsEvent) Layout(version uint32, code byte, fde *FormatDescriptionEvent) *layout.Layout {
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var sidsLen uint64
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return layout.Decl(
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layout.Number(&sidsLen),
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layout.Area(layout.Infinite(), func(r io.Reader) error {
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e.SIDAndGTIDIntervals = make([]SIDAndGTIDInterval, sidsLen)
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for i := 0; i < int(sidsLen); i++ {
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sg := &e.SIDAndGTIDIntervals[i]
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if err := sg.Layout(version, code, fde).FromStream(r); err != nil {
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return nil
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}
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}
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return nil
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}),
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)
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}
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