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85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
package ack
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import (
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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/typeutil"
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)
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var _ typeutil.HeapInterface = (*ackersOrderByTimestamp)(nil)
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// Acker records the timestamp and last confirmed message id that has not been acknowledged.
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type Acker struct {
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acknowledged bool // is acknowledged.
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detail *AckDetail // info is available after acknowledged.
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manager *AckManager // the manager of the acker.
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}
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// LastConfirmedMessageID returns the last confirmed message id.
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func (ta *Acker) LastConfirmedMessageID() message.MessageID {
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return ta.detail.LastConfirmedMessageID
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}
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// Timestamp returns the timestamp.
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func (ta *Acker) Timestamp() uint64 {
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return ta.detail.BeginTimestamp
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}
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// Ack marks the timestamp as acknowledged.
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func (ta *Acker) Ack(opts ...AckOption) {
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for _, opt := range opts {
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opt(ta.detail)
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}
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ta.manager.ack(ta)
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}
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// ackDetail returns the ack info, only can be called after acknowledged.
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func (ta *Acker) ackDetail() *AckDetail {
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if !ta.acknowledged {
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panic("unreachable: ackDetail can only be called after acknowledged")
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}
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return ta.detail
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}
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// ackersOrderByTimestamp is a heap underlying represent of timestampAck.
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type ackersOrderByTimestamp struct {
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ackers
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}
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// Less returns true if the element at index i is less than the element at index j.
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func (h ackersOrderByTimestamp) Less(i, j int) bool {
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return h.ackers[i].detail.BeginTimestamp < h.ackers[j].detail.BeginTimestamp
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}
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// ackers is a heap underlying represent of timestampAck.
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type ackers []*Acker
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// Len returns the length of the heap.
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func (h ackers) Len() int {
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return len(h)
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}
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// Swap swaps the elements at indexes i and j.
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func (h ackers) Swap(i, j int) { h[i], h[j] = h[j], h[i] }
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// Push pushes the last one at len.
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func (h *ackers) Push(x interface{}) {
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// Push and Pop use pointer receivers because they modify the slice's length,
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// not just its contents.
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*h = append(*h, x.(*Acker))
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}
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// Pop pop the last one at len.
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func (h *ackers) Pop() interface{} {
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old := *h
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n := len(old)
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x := old[n-1]
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old[n-1] = nil // release the memory of underlying array.
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*h = old[0 : n-1]
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return x
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}
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// Peek returns the element at the top of the heap.
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func (h *ackers) Peek() interface{} {
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return (*h)[0]
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}
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