71 lines
1.8 KiB
Go
71 lines
1.8 KiB
Go
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package storage
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import (
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"database/sql"
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"github.com/matrix-org/dendrite/roomserver/types"
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)
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type statements struct {
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selectPartitionOffsetsStmt *sql.Stmt
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upsertPartitionOffsetStmt *sql.Stmt
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}
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func (s *statements) prepare(db *sql.DB) error {
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var err error
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_, err = db.Exec(partitionOffsetsSchema)
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if err != nil {
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return err
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}
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if s.selectPartitionOffsetsStmt, err = db.Prepare(selectPartitionOffsetsSQL); err != nil {
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return err
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}
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if s.upsertPartitionOffsetStmt, err = db.Prepare(upsertPartitionOffsetsSQL); err != nil {
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return err
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}
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return nil
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}
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const partitionOffsetsSchema = `
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-- The offsets that the server has processed up to.
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CREATE TABLE IF NOT EXISTS partition_offsets (
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-- The name of the topic.
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topic TEXT NOT NULL,
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-- The 32-bit partition ID
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partition INTEGER NOT NULL,
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-- The 64-bit offset.
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partition_offset BIGINT NOT NULL,
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CONSTRAINT topic_partition_unique UNIQUE (topic, partition)
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);
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`
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const selectPartitionOffsetsSQL = "" +
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"SELECT partition, partition_offset FROM partition_offsets WHERE topic = $1"
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const upsertPartitionOffsetsSQL = "" +
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"INSERT INTO partition_offsets (topic, partition, partition_offset) VALUES ($1, $2, $3)" +
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" ON CONFLICT ON CONSTRAINT topic_partition_unique" +
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" DO UPDATE SET partition_offset = $3"
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func (s *statements) selectPartitionOffsets(topic string) ([]types.PartitionOffset, error) {
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rows, err := s.selectPartitionOffsetsStmt.Query(topic)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var results []types.PartitionOffset
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for rows.Next() {
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var offset types.PartitionOffset
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if err := rows.Scan(&offset.Partition, &offset.Offset); err != nil {
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return nil, err
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}
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}
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return results, nil
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}
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func (s *statements) upsertPartitionOffset(topic string, partition int32, offset int64) error {
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_, err := s.upsertPartitionOffsetStmt.Exec(topic, partition, offset)
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return err
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}
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