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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>
49 lines
2.0 KiB
Go
49 lines
2.0 KiB
Go
package replicates
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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/util/replicateutil"
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)
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type replicateAckerImpl func(err error)
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func (r replicateAckerImpl) Ack(err error) {
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r(err)
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}
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// ReplicateAcker is a guard for replicate message.
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type ReplicateAcker interface {
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// Ack acknowledges the replicate message operation is done.
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// It will push forward the in-memory checkpoint if the err is nil.
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Ack(err error)
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}
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// ReplicateManager manages the replicate operation on one wal.
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// There are two states:
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// 1. primary: wal will only receive the non-replicate message.
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// 2. secondary: wal will only receive the replicate message.
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type ReplicateManager interface {
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// Role returns the role of the replicate manager.
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Role() replicateutil.Role
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// SwitchReplicateMode switches the replicate mode.
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// following cases will happens:
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// 1. primary->secondary: will transit into replicating mode, the message without replicate header will be rejected.
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// 2. primary->primary: nothing happens,
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// 3. secondary->primary: will transit into non-replicating mode, the secondary replica state (remote cluster replicating checkpoint...) will be dropped.
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// 4. secondary->secondary with the source cluster is changed: the previous remote cluster replicating checkpoint will be dropped.
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// 5. secondary->secondary without the source cluster is changed: nothing happens.
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SwitchReplicateMode(ctx context.Context, msg message.MutableAlterReplicateConfigMessageV2) error
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// BeginReplicateMessage begins the replicate one-replicated-message operation.
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// ReplicateAcker's Ack method should be called if returned without error.
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BeginReplicateMessage(ctx context.Context, msg message.MutableMessage) (ReplicateAcker, error)
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// GetReplicateCheckpoint gets current replicate checkpoint.
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// return ReplicateViolationError if the replicate mode is not replicating.
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GetReplicateCheckpoint() (*utility.ReplicateCheckpoint, error)
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}
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