A quick sample code to create a google pubsub topic and subscription and publish/receive form/to it.

Setup:

• Create a GCP project
• From the API and services add pubsub
• Create a service account and give it pubsub role, save the credentials

Execution:

• To create topic and subscription:

  ./gopubsub -create -projectId=<projectId> -topic=<topic> -subscription=<subscription>
  

• To receive messages from a topic/subscription:

  ./gopubsub -projectId=<projectId> -topic=<topic> -subscription=<subscription> -publisher=false
  

• To publish messages, one word at a time, on a topic/subscription:

  ./gopubsub -projectId=<projectId> -topic=<topic> -subscription=<subscription> -publisher