gcp►b-data-engineer

b06-01-Cloud-PubSub-HelloWorld

In this article I will show you how to publish and receive messages in PubSub with Java

  1. create topic

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    gcloud pubsub topics create my-topic

  2. create subscription to this topic

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    gcloud pubsub subscriptions create my-sub --topic my-topic

  3. git clone project into cloud shell

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    git clone https://github.com/googleapis/java-pubsub.git

  4. go into the sample

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    cd samples/snippets/

  5. modify PublisherExample.java and SubscribeAsyncExample.java to put the right project id, topic id and subscription id

  6. compile project

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    mvn clean install -DskipTests

  7. run subscriber

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    mvn exec:java -Dexec.mainClass="pubsub.SubscribeAsyncExample"

  8. run publisher in another screen and observe subscriber

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    mvn exec:java -Dexec.mainClass="pubsub.PublisherExample"