| // Copyright 2020 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| |
| package common |
| |
| import ( |
| "fmt" |
| "strconv" |
| "strings" |
| ) |
| |
| // PublishMetadata holds the results of a published message. |
| type PublishMetadata struct { |
| Partition int |
| Offset int64 |
| } |
| |
| func (pm *PublishMetadata) String() string { |
| return fmt.Sprintf("%d:%d", pm.Partition, pm.Offset) |
| } |
| |
| // ParsePublishMetadata converts a string obtained from PublishMetadata.String() |
| // back to PublishMetadata. |
| func ParsePublishMetadata(input string) (*PublishMetadata, error) { |
| parts := strings.Split(input, ":") |
| if len(parts) != 2 { |
| return nil, fmt.Errorf("pubsublite: invalid encoded PublishMetadata %q", input) |
| } |
| |
| partition, pErr := strconv.ParseInt(parts[0], 10, 64) |
| offset, oErr := strconv.ParseInt(parts[1], 10, 64) |
| if pErr != nil || oErr != nil { |
| return nil, fmt.Errorf("pubsublite: invalid encoded PublishMetadata %q", input) |
| } |
| return &PublishMetadata{Partition: int(partition), Offset: offset}, nil |
| } |