github.com/QuangHoangHao/kafka-go@v0.4.36/commit.go (about) 1 package kafka 2 3 // A commit represents the instruction of publishing an update of the last 4 // offset read by a program for a topic and partition. 5 type commit struct { 6 topic string 7 partition int 8 offset int64 9 } 10 11 // makeCommit builds a commit value from a message, the resulting commit takes 12 // its topic, partition, and offset from the message. 13 func makeCommit(msg Message) commit { 14 return commit{ 15 topic: msg.Topic, 16 partition: msg.Partition, 17 offset: msg.Offset + 1, 18 } 19 } 20 21 // makeCommits generates a slice of commits from a list of messages, it extracts 22 // the topic, partition, and offset of each message and builds the corresponding 23 // commit slice. 24 func makeCommits(msgs ...Message) []commit { 25 commits := make([]commit, len(msgs)) 26 27 for i, m := range msgs { 28 commits[i] = makeCommit(m) 29 } 30 31 return commits 32 } 33 34 // commitRequest is the data type exchanged between the CommitMessages method 35 // and internals of the reader's implementation. 36 type commitRequest struct { 37 commits []commit 38 errch chan<- error 39 }