Example #1
0
func applyPut(kv dstorage.KV, p *pb.PutRequest) (*pb.PutResponse, error) {
	resp := &pb.PutResponse{}
	resp.Header = &pb.ResponseHeader{}
	rev := kv.Put(p.Key, p.Value)
	resp.Header.Revision = rev
	return resp, nil
}
Example #2
0
func applyDeleteRange(kv dstorage.KV, dr *pb.DeleteRangeRequest) (*pb.DeleteRangeResponse, error) {
	resp := &pb.DeleteRangeResponse{}
	resp.Header = &pb.ResponseHeader{}
	_, rev := kv.DeleteRange(dr.Key, dr.RangeEnd)
	resp.Header.Revision = rev
	return resp, nil
}
Example #3
0
func applyCompaction(kv dstorage.KV, compaction *pb.CompactionRequest) (*pb.CompactionResponse, error) {
	resp := &pb.CompactionResponse{}
	resp.Header = &pb.ResponseHeader{}
	err := kv.Compact(compaction.Revision)
	if err != nil {
		return nil, err
	}
	// get the current revision. which key to get is not important.
	_, resp.Header.Revision, _ = kv.Range([]byte("compaction"), nil, 1, 0)
	return resp, err
}
Example #4
0
func applyRange(kv dstorage.KV, r *pb.RangeRequest) (*pb.RangeResponse, error) {
	resp := &pb.RangeResponse{}
	resp.Header = &pb.ResponseHeader{}
	kvs, rev, err := kv.Range(r.Key, r.RangeEnd, r.Limit, 0)
	if err != nil {
		return nil, err
	}

	resp.Header.Revision = rev
	for i := range kvs {
		resp.Kvs = append(resp.Kvs, &kvs[i])
	}
	return resp, nil
}
Example #5
0
func applyCompare(kv dstorage.KV, c *pb.Compare) (int64, bool) {
	ckvs, rev, err := kv.Range(c.Key, nil, 1, 0)
	if err != nil {
		return rev, false
	}

	ckv := ckvs[0]

	// -1 is less, 0 is equal, 1 is greater
	var result int
	switch c.Target {
	case pb.Compare_VALUE:
		result = bytes.Compare(ckv.Value, c.Value)
	case pb.Compare_CREATE:
		result = compareInt64(ckv.CreateRevision, c.CreateRevision)
	case pb.Compare_MOD:
		result = compareInt64(ckv.ModRevision, c.ModRevision)
	case pb.Compare_VERSION:
		result = compareInt64(ckv.Version, c.Version)
	}

	switch c.Result {
	case pb.Compare_EQUAL:
		if result != 0 {
			return rev, false
		}
	case pb.Compare_GREATER:
		if result != 1 {
			return rev, false
		}
	case pb.Compare_LESS:
		if result != -1 {
			return rev, false
		}
	}
	return rev, true
}