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c171280f63
issue: #44123 - support replicate message in wal of milvus. - support CDC-replicate recovery from wal. - fix some CDC replicator bugs Signed-off-by: chyezh <chyezh@outlook.com>
63 lines
2.1 KiB
Go
63 lines
2.1 KiB
Go
package wal
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import (
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"context"
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"github.com/milvus-io/milvus/internal/streamingnode/server/wal/utility"
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"github.com/milvus-io/milvus/pkg/v2/streaming/util/message"
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"github.com/milvus-io/milvus/pkg/v2/streaming/util/types"
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)
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type (
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AppendResult = types.AppendResult
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ReplicateCheckpoint = utility.ReplicateCheckpoint
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)
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// WAL is the WAL framework interface.
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// !!! Don't implement it directly, implement walimpls.WAL instead.
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type WAL interface {
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ROWAL
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// GetLatestMVCCTimestamp get the latest mvcc timestamp of the wal at vchannel.
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GetLatestMVCCTimestamp(ctx context.Context, vchannel string) (uint64, error)
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// GetReplicateCheckpoint returns the replicate checkpoint of the wal.
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// If the wal is not on replicating mode, it will return ReplicateViolationError.
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// If the wal is on replicating mode, it will return the replicate checkpoint of the wal.
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// If the wal is initialized into replica mode, not replicate any message,
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// the message id of the replicate checkpoint will be 0.
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GetReplicateCheckpoint() (*ReplicateCheckpoint, error)
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// Append writes a record to the log.
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Append(ctx context.Context, msg message.MutableMessage) (*AppendResult, error)
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// Append a record to the log asynchronously.
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AppendAsync(ctx context.Context, msg message.MutableMessage, cb func(*AppendResult, error))
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}
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// ROWAL is the read-only WAL interface.
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// ROWAL only supports reading records from the wal but not writing.
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// !!! Don't implement it directly, implement walimpls.WAL instead.
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type ROWAL interface {
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// WALName returns the name of the wal.
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WALName() message.WALName
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// Metrics returns the metrics of the wal.
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Metrics() types.WALMetrics
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// Channel returns the channel assignment info of the wal.
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Channel() types.PChannelInfo
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// Read returns a scanner for reading records from the wal.
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Read(ctx context.Context, deliverPolicy ReadOption) (Scanner, error)
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// Available return a channel that will be closed when the wal is available.
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Available() <-chan struct{}
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// IsAvailable returns if the wal is available.
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IsAvailable() bool
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// Close closes the wal instance.
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Close()
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}
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