https://github.com/jdamick/kafka

Producer and Consumer for Kafka in Go
https://github.com/jdamick/kafka

Last synced: 2 months ago
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Producer and Consumer for Kafka in Go

• Host: GitHub
• URL: https://github.com/jdamick/kafka
• Owner: jdamick
• License: apache-2.0
• Created: 2011-05-16T15:19:43.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2017-01-24T15:08:55.000Z (about 8 years ago)
• Last Synced: 2024-11-08T20:24:44.966Z (3 months ago)
• Language: Go
• Homepage:
• Size: 107 KB
• Stars: 130
• Watchers: 10
• Forks: 38
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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# kafka - Publisher & Consumer for Kafka 0.7.x in Go #

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Kafka is a distributed publish-subscribe messaging system: (http://kafka.apache.org)

Go language: (http://golang.org/) 


##### For Kafka 0.8.x take a look at https://github.com/Shopify/sarama

## Changes

### May 2015

* fixed bug handling partial message at end of a fetch response when the payload is < 4 bytes

* if the the kafka log segment being read is cleaned up, attempt resuming the consumer from the earliest available offset

### April 2015

* added support for Snappy compression

* fixed handling of partial messages at the end of each fetch response

* added ProduceFromChannel() method in the publisher, mirroring the ConsumeOnChannel() method in the consumer

* changed the quit channel type to empty struct{}, adding ability to stop the consumer on demand without race conditions

* reused connection in BatchPublish(), instead of establishing a brand new connection every time.

* applied gofmt / golint on the code (renamed Id() to ID() for compliance)

* added comments

* better distinction between DEBUG and ERROR logs, with info on how to get the consumer unstuck when the max fetch size is too small

### April 2013

* Merged back from the apache repository & outstanding patches from jira applied

## Get up and running ##

Install go (version 1): 


For more info see: http://weekly.golang.org/doc/install.html#install 

Make sure to set your GOROOT properly (http://golang.org/doc/install.html#environment).

Also set your GOPATH appropriately: http://weekly.golang.org/doc/code.html#tmp_13

Build from source:

make kafka




Make the tools (publisher & consumer) 


make tools




Start zookeeper, Kafka server 


For more info on Kafka, see: http://incubator.apache.org/kafka/quickstart.html

## Tools ##

Start a consumer:



   $GOPATH/bin/consumer -topic test -consumeforever

  Consuming Messages :

  From: localhost:9092, topic: test, partition: 0

   ---------------------- 



Now the consumer will just poll until a message is received.

  

Publish a message:



  $GOPATH/bin/publisher -topic test -message "Hello World"



The consumer should output message.

## API Usage ##

### Publishing ###



broker := kafka.NewBrokerPublisher("localhost:9092", "mytesttopic", 0)

broker.Publish(kafka.NewMessage([]byte("testing 1 2 3")))



### Publishing Compressed Messages ###



broker := kafka.NewBrokerPublisher("localhost:9092", "mytesttopic", 0)

broker.Publish(kafka.NewCompressedMessage([]byte("testing 1 2 3")))



### Consumer ###



broker := kafka.NewBrokerConsumer("localhost:9092", "mytesttopic", 0, 0, 1048576)

broker.Consume(func(msg *kafka.Message) { msg.Print() })




Or the consumer can use a channel based approach:



broker := kafka.NewBrokerConsumer("localhost:9092", "mytesttopic", 0, 0, 1048576)

go broker.ConsumeOnChannel(msgChan, 10, quitChan)




### Consuming Offsets ###



broker := kafka.NewBrokerOffsetConsumer("localhost:9092", "mytesttopic", 0)

offsets, err := broker.GetOffsets(-1, 1)



### Contact ###

jeffreydamick (at) gmail (dot) com

http://twitter.com/jeffreydamick

Big thank you to [NeuStar](http://neustar.biz) for sponsoring this work.