compact_op.go


package clientv3

import (
    pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
)

// CompactOp represents a compact operation.
type CompactOp struct {
    revision int64
    physical bool
}

// CompactOption configures compact operation.
type CompactOption func(*CompactOp)

func (op *CompactOp) applyCompactOpts(opts []CompactOption) {
    for _, opt := range opts {
        opt(op)
    }
}

// OpCompact wraps slice CompactOption to create a CompactOp.
func OpCompact(rev int64, opts ...CompactOption) CompactOp {
    ret := CompactOp{revision: rev}
    ret.applyCompactOpts(opts)
    return ret
}

func (op CompactOp) toRequest() *pb.CompactionRequest {
    return &pb.CompactionRequest{Revision: op.revision, Physical: op.physical}
}

// WithCompactPhysical makes compact RPC call wait until
// the compaction is physically applied to the local database
// such that compacted entries are totally removed from the
// backend database.
func WithCompactPhysical() CompactOption {
    return func(op *CompactOp) { op.physical = true }
}

原文地址:https://www.cnblogs.com/zhangboyu/p/7452667.html